A quick and dirty implementation

2020-12-03 23:08:46 -05:00 · 2020-12-03 23:08:46 -05:00 · f6e9c70eb3
commit f6e9c70eb3
parent 3682810e27
352 changed files with 242881 additions and 0 deletions
--- a/config/config.go
+++ b/config/config.go
@ -0,0 +1,42 @@
+package config
+
+import (
+	"fmt"
+
+	"github.com/pelletier/go-toml"
+	"github.com/tblyler/lightshowpi/light/rpi"
+	"github.com/tblyler/lightshowpi/sound"
+)
+
+// Config contains all the potentially needed config data
+type Config struct {
+	ListenAddress     string
+	SongPath          string
+	FMOutput          sound.FMConfig
+	LightSchedulePath string
+	RaspberryPi       struct {
+		ChipName    string
+		BasicLights map[string]struct {
+			Pin int
+		}
+	}
+}
+
+// ParseConfig from raw binary data
+func ParseConfig(rawConfig []byte) (*Config, error) {
+	config := &Config{}
+
+	err := toml.Unmarshal(rawConfig, config)
+	if err != nil {
+		return nil, fmt.Errorf("failed to unmarshal TOML config: %w", err)
+	}
+
+	return config, nil
+}
+
+// RPIManagerConfig instance derrived from this config
+func (c *Config) RPIManagerConfig() *rpi.ManagerConfig {
+	return &rpi.ManagerConfig{
+		ChipName: c.RaspberryPi.ChipName,
+	}
+}
--- a/go.mod
+++ b/go.mod
@ -0,0 +1,9 @@
+module github.com/tblyler/lightshowpi
+
+go 1.15
+
+require (
+	github.com/pelletier/go-toml v1.8.1
+	github.com/warthog618/gpiod v0.5.0
+	golang.org/x/sync v0.0.0-20201020160332-67f06af15bc9
+)
--- a/go.sum
+++ b/go.sum
@ -0,0 +1,189 @@
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--- a/light/light.go
+++ b/light/light.go
@ -0,0 +1,165 @@
+package light
+
+import (
+	"context"
+	"encoding/csv"
+	"fmt"
+	"io"
+	"os"
+	"time"
+
+	"golang.org/x/sync/errgroup"
+)
+
+// BasicLight describes a light that simply can be turned on/off, like a relay
+type BasicLight interface {
+	On() error
+	Off() error
+	State() (isOn bool, err error)
+	Close() error
+}
+
+// BasicLightConductorSchedule says which basic lights should be on/off for the second that maps to their index
+type BasicLightConductorSchedule struct {
+	On  [][]string
+	Off [][]string
+}
+
+// NewBasicLightConductorScheduleFromFile creates a new asicLightConductorSchedule instance from a file path
+func NewBasicLightConductorScheduleFromFile(filePath string) (*BasicLightConductorSchedule, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open basic light conductor schedule file at %s: %w", filePath, err)
+	}
+
+	defer file.Close()
+
+	csvReader := csv.NewReader(file)
+
+	header, err := csvReader.Read()
+	if err != nil {
+		return nil, fmt.Errorf("failed to get header for basic light conductor schedule file %s: %w", filePath, err)
+	}
+
+	schedule := &BasicLightConductorSchedule{}
+	for lineNumber := 2; true; lineNumber++ {
+		record, err := csvReader.Read()
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+
+			return nil, fmt.Errorf("failed to get record at line %d of basic light conductor schedule file %s: %w", lineNumber, filePath, err)
+		}
+
+		onRow := []string{}
+		offRow := []string{}
+
+		for columnNumber, val := range record {
+			switch val {
+			case "on":
+				onRow = append(onRow, header[columnNumber])
+			case "off":
+				offRow = append(offRow, header[columnNumber])
+
+			default:
+				return nil, fmt.Errorf(
+					"invalid setting %s at line %d column %d of basic light conductor schedule file %s: %w",
+					val,
+					lineNumber,
+					columnNumber+1,
+					filePath,
+					err,
+				)
+			}
+		}
+
+		schedule.On = append(schedule.On, onRow)
+		schedule.Off = append(schedule.Off, offRow)
+	}
+
+	return schedule, nil
+}
+
+// BasicLightConductor turns basic lights on/off for a given schedule when told to conduct
+type BasicLightConductor struct {
+	basicLights map[string]BasicLight
+	schedule    *BasicLightConductorSchedule
+}
+
+// NewBasicLightConductor creates a basic light conductor instance for the given basic lights and schedule
+func NewBasicLightConductor(basicLights map[string]BasicLight, schedule *BasicLightConductorSchedule) *BasicLightConductor {
+	return &BasicLightConductor{
+		basicLights: basicLights,
+		schedule:    schedule,
+	}
+}
+
+func (blc *BasicLightConductor) setStatesForSecondInterval(i int) error {
+	errGroup := errgroup.Group{}
+
+	errGroup.Go(func() error {
+		for _, alias := range blc.schedule.Off[i] {
+			basicLight, ok := blc.basicLights[alias]
+			if !ok {
+				return fmt.Errorf("invalid alias %s for basic light provided at schedule index %d", alias, i)
+			}
+
+			err := basicLight.Off()
+			if err != nil {
+				return fmt.Errorf("failed to turn off basic light alias %s: %w", alias, err)
+			}
+		}
+
+		return nil
+	})
+
+	errGroup.Go(func() error {
+		for _, alias := range blc.schedule.On[i] {
+			basicLight, ok := blc.basicLights[alias]
+			if !ok {
+				return fmt.Errorf("invalid alias %s for basic light provided at schedule index %d", alias, i)
+			}
+
+			err := basicLight.On()
+			if err != nil {
+				return fmt.Errorf("failed to turn on basic light alias %s: %w", alias, err)
+			}
+		}
+
+		return nil
+	})
+
+	return errGroup.Wait()
+}
+
+// Start begins turning the basic lights on/off for the given schedule
+func (blc *BasicLightConductor) Start(ctx context.Context) error {
+	ticker := time.NewTicker(time.Second)
+	defer ticker.Stop()
+
+	scheduleLen := len(blc.schedule.Off)
+	if onLen := len(blc.schedule.On); scheduleLen != onLen {
+		return fmt.Errorf("schedule for on/off light aliases do not have the same amount of entries! on: %d off: %d", onLen, scheduleLen)
+	}
+
+	err := blc.setStatesForSecondInterval(0)
+	if err != nil {
+		return err
+	}
+
+	for i := 1; i < scheduleLen; i++ {
+		select {
+		case <-ctx.Done():
+			return ctx.Err()
+
+		case <-ticker.C:
+			err = blc.setStatesForSecondInterval(i)
+			if err != nil {
+				return err
+			}
+		}
+	}
+
+	return nil
+}
--- a/light/rpi/basic_light.go
+++ b/light/rpi/basic_light.go
@ -0,0 +1,68 @@
+package rpi
+
+import (
+	"fmt"
+	"sync"
+
+	"github.com/warthog618/gpiod"
+)
+
+// BasicLight is a BasicLight implementation for the Raspberry Pi
+type BasicLight struct {
+	pin      int
+	line     *gpiod.Line
+	manager  *Manager
+	isOn     bool
+	isOnLock sync.Mutex
+}
+
+// On turns on the light
+func (bl *BasicLight) On() error {
+	bl.isOnLock.Lock()
+	defer bl.isOnLock.Unlock()
+
+	if bl.isOn {
+		return nil
+	}
+
+	err := bl.line.SetValue(0)
+	if err != nil {
+		return fmt.Errorf("failed to set pin %d to low (on): %w", bl.pin, err)
+	}
+
+	bl.isOn = true
+
+	return nil
+}
+
+// Off turns off the light
+func (bl *BasicLight) Off() error {
+	bl.isOnLock.Lock()
+	defer bl.isOnLock.Unlock()
+
+	if !bl.isOn {
+		return nil
+	}
+
+	err := bl.line.SetValue(1)
+	if err != nil {
+		return fmt.Errorf("failed to set pin %d to high (on): %w", bl.pin, err)
+	}
+
+	bl.isOn = false
+
+	return nil
+}
+
+// State of whether the light is on or off
+func (bl *BasicLight) State() (isOn bool, err error) {
+	bl.isOnLock.Lock()
+	defer bl.isOnLock.Unlock()
+
+	return bl.isOn, nil
+}
+
+// Close underlying open connection
+func (bl *BasicLight) Close() error {
+	return bl.manager.closeLine(bl.pin)
+}
--- a/light/rpi/manager.go
+++ b/light/rpi/manager.go
@ -0,0 +1,121 @@
+package rpi
+
+import (
+	"errors"
+	"fmt"
+	"sync"
+
+	"github.com/warthog618/gpiod"
+)
+
+const (
+	// DefaultChipName to try to use if one is not provided
+	DefaultChipName = "gpiochip0"
+)
+
+var (
+	// ErrLineAlreadyRequested denotes that the requested line is not available because it has already been requested and not Closed
+	ErrLineAlreadyRequested = errors.New("line has already been requested")
+
+	// ErrLineNotRequested denotes that the given line cannot be acted on because it was not previously requested
+	ErrLineNotRequested = errors.New("line was not previously requested")
+)
+
+// ManagerConfig configuration for a Manager
+type ManagerConfig struct {
+	ChipName string
+}
+
+// GetChipName from the config
+func (mc *ManagerConfig) GetChipName() string {
+	if mc.ChipName == "" {
+		return DefaultChipName
+	}
+
+	return mc.ChipName
+}
+
+// Manager for overarching raspberry pi GPIO management
+type Manager struct {
+	config    *ManagerConfig
+	chip      *gpiod.Chip
+	lines     map[int]*gpiod.Line
+	linesLock sync.Mutex
+}
+
+// NewManager creates a new Manager instance for the given config
+func NewManager(config ManagerConfig) (*Manager, error) {
+	chip, err := gpiod.NewChip(config.GetChipName())
+	if err != nil {
+		return nil, fmt.Errorf("failed to open GPIO chip %s: %w", config.GetChipName(), err)
+	}
+
+	return &Manager{
+		config: &config,
+		chip:   chip,
+		lines:  make(map[int]*gpiod.Line),
+	}, nil
+}
+
+// GetBasicLight for the given pin if available
+func (m *Manager) GetBasicLight(pin int) (*BasicLight, error) {
+	line, err := m.requestLine(pin)
+	if err != nil {
+		return nil, err
+	}
+
+	return &BasicLight{
+		pin:     pin,
+		line:    line,
+		manager: m,
+	}, nil
+}
+
+func (m *Manager) requestLine(pin int) (*gpiod.Line, error) {
+	m.linesLock.Lock()
+	defer m.linesLock.Unlock()
+
+	_, exists := m.lines[pin]
+	if exists {
+		return nil, fmt.Errorf("%w pin %d", ErrLineAlreadyRequested, pin)
+	}
+
+	line, err := m.chip.RequestLine(pin, gpiod.AsOutput(0))
+	if err != nil {
+		return nil, fmt.Errorf("failed to request line for pin %d: %w", pin, err)
+	}
+
+	m.lines[pin] = line
+
+	return line, nil
+}
+
+func (m *Manager) closeLine(pin int) error {
+	m.linesLock.Lock()
+	defer m.linesLock.Unlock()
+
+	return m.closeLineHelper(pin)
+}
+
+func (m *Manager) closeLineHelper(pin int) error {
+	line := m.lines[pin]
+	if line == nil {
+		return fmt.Errorf("%w pin %d", ErrLineNotRequested, pin)
+	}
+
+	delete(m.lines, pin)
+
+	return line.Close()
+}
+
+// Close this Manager and all of its associated lines
+func (m *Manager) Close() error {
+	m.linesLock.Lock()
+	defer m.linesLock.Unlock()
+
+	for pin := range m.lines {
+		m.closeLineHelper(pin)
+	}
+
+	return m.chip.Close()
+}
--- a/main.go
+++ b/main.go
@ -0,0 +1,86 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"github.com/tblyler/lightshowpi/config"
+	"github.com/tblyler/lightshowpi/light"
+	"github.com/tblyler/lightshowpi/light/rpi"
+	"github.com/tblyler/lightshowpi/sound"
+	"golang.org/x/sync/errgroup"
+)
+
+func readConfig(filePath string) (*config.Config, error) {
+	file, err := os.Open(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to open %s: %w", filePath, err)
+	}
+
+	defer file.Close()
+
+	rawConfigData, err := ioutil.ReadAll(file)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read config file %s: %w", filePath, err)
+	}
+
+	config, err := config.ParseConfig(rawConfigData)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse %s: %w", filePath, err)
+	}
+
+	return config, nil
+}
+
+func main() {
+	err := func() error {
+		cfg, err := readConfig("/etc/lightshowpi.toml")
+		if err != nil {
+			return err
+		}
+
+		piManager, err := rpi.NewManager(*cfg.RPIManagerConfig())
+		if err != nil {
+			return err
+		}
+
+		defer piManager.Close()
+
+		basicLights := map[string]light.BasicLight{}
+
+		for alias, info := range cfg.RaspberryPi.BasicLights {
+			basicLight, err := piManager.GetBasicLight(info.Pin)
+			if err != nil {
+				return fmt.Errorf("failed to get raspberry pi basic light %s for pin %d: %w", alias, info.Pin, err)
+			}
+
+			basicLights[alias] = basicLight
+		}
+
+		basicLightConductorSchedule, err := light.NewBasicLightConductorScheduleFromFile(cfg.LightSchedulePath)
+		if err != nil {
+			return err
+		}
+
+		basicLightConductor := light.NewBasicLightConductor(basicLights, basicLightConductorSchedule)
+		soundOuput := sound.NewFM(cfg.FMOutput)
+
+		errGroup, errGroupCtx := errgroup.WithContext(context.TODO())
+		errGroup.Go(func() error {
+			return basicLightConductor.Start(errGroupCtx)
+		})
+
+		errGroup.Go(func() error {
+			return soundOuput.Play(errGroupCtx, cfg.SongPath)
+		})
+
+		return errGroup.Wait()
+	}()
+
+	if err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
--- a/sound/fm.go
+++ b/sound/fm.go
@ -0,0 +1,87 @@
+package sound
+
+import (
+	"context"
+	"fmt"
+	"io"
+	"os/exec"
+)
+
+// FMConfig defines the tunables for an FM instance
+type FMConfig struct {
+	Frequency float32
+}
+
+// FM is a sound.Output implementation that outputs to an FM frequency
+type FM struct {
+	config *FMConfig
+}
+
+// NewFM creates a new FM instance with the given config
+func NewFM(config FMConfig) *FM {
+	return &FM{
+		config: &config,
+	}
+}
+
+// Play the given input to the FM frequency
+func (f *FM) Play(ctx context.Context, filePath string) error {
+	ctx, cancel := context.WithCancel(ctx)
+	defer cancel()
+
+	soxCmd := exec.CommandContext(
+		ctx,
+		"sox",
+		filePath,
+		"-r", "22050",
+		"-c", "1",
+		"-b", "16",
+		"-t", "wav",
+		"-",
+	)
+
+	reader, err := soxCmd.StdoutPipe()
+	if err != nil {
+		return fmt.Errorf("failed to open STDOUT pipe for converting the input file to the FM transmitter format: %w", err)
+	}
+
+	err = soxCmd.Start()
+	if err != nil {
+		return fmt.Errorf("failed to start conversion for the input file for the FM transmitter: %w", err)
+	}
+
+	fmCmd := exec.CommandContext(
+		ctx,
+		"fm_transmitter",
+		"-f",
+		fmt.Sprintf("%.1f", f.config.Frequency),
+		"-",
+	)
+
+	writer, err := fmCmd.StdinPipe()
+	if err != nil {
+		return fmt.Errorf("failed to create STDIN pipe for FM transmitter: %w", err)
+	}
+
+	err = fmCmd.Start()
+	if err != nil {
+		return fmt.Errorf("failed to start FM transmitter command: %w", err)
+	}
+
+	_, err = io.Copy(writer, reader)
+	if err != nil {
+		return fmt.Errorf("failed to write audio output to FM transmitter: %w", err)
+	}
+
+	err = soxCmd.Wait()
+	if err != nil {
+		return fmt.Errorf("audio conversion command resulted in an error: %w", err)
+	}
+
+	err = fmCmd.Wait()
+	if err != nil {
+		return fmt.Errorf("FM transmitter command resulted in an error: %w", err)
+	}
+
+	return nil
+}
--- a/sound/sound.go
+++ b/sound/sound.go
@ -0,0 +1,9 @@
+package sound
+
+import (
+	"context"
+)
+
+type Output interface {
+	Play(ctx context.Context, filePath string) error
+}
--- a/vendor/github.com/pelletier/go-toml/.dockerignore
+++ b/vendor/github.com/pelletier/go-toml/.dockerignore
@ -0,0 +1,2 @@
+cmd/tomll/tomll
+cmd/tomljson/tomljson
--- a/vendor/github.com/pelletier/go-toml/.gitignore
+++ b/vendor/github.com/pelletier/go-toml/.gitignore
@ -0,0 +1,5 @@
+test_program/test_program_bin
+fuzz/
+cmd/tomll/tomll
+cmd/tomljson/tomljson
+cmd/tomltestgen/tomltestgen
--- a/vendor/github.com/pelletier/go-toml/CONTRIBUTING.md
+++ b/vendor/github.com/pelletier/go-toml/CONTRIBUTING.md
@ -0,0 +1,132 @@
+## Contributing
+
+Thank you for your interest in go-toml! We appreciate you considering
+contributing to go-toml!
+
+The main goal is the project is to provide an easy-to-use TOML
+implementation for Go that gets the job done and gets out of your way –
+dealing with TOML is probably not the central piece of your project.
+
+As the single maintainer of go-toml, time is scarce. All help, big or
+small, is more than welcomed!
+
+### Ask questions
+
+Any question you may have, somebody else might have it too. Always feel
+free to ask them on the [issues tracker][issues-tracker].  We will try to
+answer them as clearly and quickly as possible, time permitting.
+
+Asking questions also helps us identify areas where the documentation needs
+improvement, or new features that weren't envisioned before. Sometimes, a
+seemingly innocent question leads to the fix of a bug. Don't hesitate and
+ask away!
+
+### Improve the documentation
+
+The best way to share your knowledge and experience with go-toml is to
+improve the documentation. Fix a typo, clarify an interface, add an
+example, anything goes!
+
+The documentation is present in the [README][readme] and thorough the
+source code. On release, it gets updated on [GoDoc][godoc]. To make a
+change to the documentation, create a pull request with your proposed
+changes. For simple changes like that, the easiest way to go is probably
+the "Fork this project and edit the file" button on Github, displayed at
+the top right of the file. Unless it's a trivial change (for example a
+typo), provide a little bit of context in your pull request description or
+commit message.
+
+### Report a bug
+
+Found a bug! Sorry to hear that :(. Help us and other track them down and
+fix by reporting it. [File a new bug report][bug-report] on the [issues
+tracker][issues-tracker]. The template should provide enough guidance on
+what to include. When in doubt: add more details! By reducing ambiguity and
+providing more information, it decreases back and forth and saves everyone
+time.
+
+### Code changes
+
+Want to contribute a patch? Very happy to hear that!
+
+First, some high-level rules:
+
+* A short proposal with some POC code is better than a lengthy piece of
+  text with no code. Code speaks louder than words.
+* No backward-incompatible patch will be accepted unless discussed.
+  Sometimes it's hard, and Go's lack of versioning by default does not
+  help, but we try not to break people's programs unless we absolutely have
+  to.
+* If you are writing a new feature or extending an existing one, make sure
+  to write some documentation.
+* Bug fixes need to be accompanied with regression tests.
+* New code needs to be tested.
+* Your commit messages need to explain why the change is needed, even if
+  already included in the PR description.
+
+It does sound like a lot, but those best practices are here to save time
+overall and continuously improve the quality of the project, which is
+something everyone benefits from.
+
+#### Get started
+
+The fairly standard code contribution process looks like that:
+
+1. [Fork the project][fork].
+2. Make your changes, commit on any branch you like.
+3. [Open up a pull request][pull-request]
+4. Review, potential ask for changes.
+5. Merge. You're in!
+
+Feel free to ask for help! You can create draft pull requests to gather
+some early feedback!
+
+#### Run the tests
+
+You can run tests for go-toml using Go's test tool: `go test ./...`.
+When creating a pull requests, all tests will be ran on Linux on a few Go
+versions (Travis CI), and on Windows using the latest Go version
+(AppVeyor).
+
+#### Style
+
+Try to look around and follow the same format and structure as the rest of
+the code. We enforce using `go fmt` on the whole code base.
+
+---
+
+### Maintainers-only
+
+#### Merge pull request
+
+Checklist:
+
+* Passing CI.
+* Does not introduce backward-incompatible changes (unless discussed).
+* Has relevant doc changes.
+* Has relevant unit tests.
+
+1. Merge using "squash and merge".
+2. Make sure to edit the commit message to keep all the useful information
+   nice and clean.
+3. Make sure the commit title is clear and contains the PR number (#123).
+
+#### New release
+
+1. Go to [releases][releases]. Click on "X commits to master since this
+   release".
+2. Make note of all the changes. Look for backward incompatible changes,
+   new features, and bug fixes.
+3. Pick the new version using the above and semver.
+4. Create a [new release][new-release].
+5. Follow the same format as [1.1.0][release-110].
+
+[issues-tracker]: https://github.com/pelletier/go-toml/issues
+[bug-report]: https://github.com/pelletier/go-toml/issues/new?template=bug_report.md
+[godoc]: https://godoc.org/github.com/pelletier/go-toml
+[readme]: ./README.md
+[fork]: https://help.github.com/articles/fork-a-repo
+[pull-request]: https://help.github.com/en/articles/creating-a-pull-request
+[releases]: https://github.com/pelletier/go-toml/releases
+[new-release]: https://github.com/pelletier/go-toml/releases/new
+[release-110]: https://github.com/pelletier/go-toml/releases/tag/v1.1.0
--- a/vendor/github.com/pelletier/go-toml/Dockerfile
+++ b/vendor/github.com/pelletier/go-toml/Dockerfile
@ -0,0 +1,11 @@
+FROM golang:1.12-alpine3.9 as builder
+WORKDIR /go/src/github.com/pelletier/go-toml
+COPY . .
+ENV CGO_ENABLED=0
+ENV GOOS=linux
+RUN go install ./...
+
+FROM scratch
+COPY --from=builder /go/bin/tomll /usr/bin/tomll
+COPY --from=builder /go/bin/tomljson /usr/bin/tomljson
+COPY --from=builder /go/bin/jsontoml /usr/bin/jsontoml
--- a/vendor/github.com/pelletier/go-toml/LICENSE
+++ b/vendor/github.com/pelletier/go-toml/LICENSE
@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2013 - 2017 Thomas Pelletier, Eric Anderton
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/vendor/github.com/pelletier/go-toml/Makefile
+++ b/vendor/github.com/pelletier/go-toml/Makefile
@ -0,0 +1,29 @@
+export CGO_ENABLED=0
+go := go
+go.goos ?= $(shell echo `go version`|cut -f4 -d ' '|cut -d '/' -f1)
+go.goarch ?= $(shell echo `go version`|cut -f4 -d ' '|cut -d '/' -f2)
+
+out.tools := tomll tomljson jsontoml
+out.dist := $(out.tools:=_$(go.goos)_$(go.goarch).tar.xz)
+sources := $(wildcard **/*.go)
+
+
+.PHONY:
+tools: $(out.tools)
+
+$(out.tools): $(sources)
+	GOOS=$(go.goos) GOARCH=$(go.goarch) $(go) build ./cmd/$@
+
+.PHONY:
+dist: $(out.dist)
+
+$(out.dist):%_$(go.goos)_$(go.goarch).tar.xz: %
+	if [ "$(go.goos)" = "windows" ]; then \
+		tar -cJf $@ $^.exe; \
+	else \
+		tar -cJf $@ $^; \
+	fi
+
+.PHONY:
+clean:
+	rm -rf $(out.tools) $(out.dist)
--- a/vendor/github.com/pelletier/go-toml/PULL_REQUEST_TEMPLATE.md
+++ b/vendor/github.com/pelletier/go-toml/PULL_REQUEST_TEMPLATE.md
@ -0,0 +1,5 @@
+**Issue:** add link to pelletier/go-toml issue here
+
+Explanation of what this pull request does.
+
+More detailed description of the decisions being made and the reasons why (if the patch is non-trivial).
--- a/vendor/github.com/pelletier/go-toml/README.md
+++ b/vendor/github.com/pelletier/go-toml/README.md
@ -0,0 +1,151 @@
+# go-toml
+
+Go library for the [TOML](https://github.com/mojombo/toml) format.
+
+This library supports TOML version
+[v1.0.0-rc.1](https://github.com/toml-lang/toml/blob/master/versions/en/toml-v1.0.0-rc.1.md)
+
+[![GoDoc](https://godoc.org/github.com/pelletier/go-toml?status.svg)](http://godoc.org/github.com/pelletier/go-toml)
+[![license](https://img.shields.io/github/license/pelletier/go-toml.svg)](https://github.com/pelletier/go-toml/blob/master/LICENSE)
+[![Build Status](https://dev.azure.com/pelletierthomas/go-toml-ci/_apis/build/status/pelletier.go-toml?branchName=master)](https://dev.azure.com/pelletierthomas/go-toml-ci/_build/latest?definitionId=1&branchName=master)
+[![codecov](https://codecov.io/gh/pelletier/go-toml/branch/master/graph/badge.svg)](https://codecov.io/gh/pelletier/go-toml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/pelletier/go-toml)](https://goreportcard.com/report/github.com/pelletier/go-toml)
+[![FOSSA Status](https://app.fossa.io/api/projects/git%2Bgithub.com%2Fpelletier%2Fgo-toml.svg?type=shield)](https://app.fossa.io/projects/git%2Bgithub.com%2Fpelletier%2Fgo-toml?ref=badge_shield)
+
+## Features
+
+Go-toml provides the following features for using data parsed from TOML documents:
+
+* Load TOML documents from files and string data
+* Easily navigate TOML structure using Tree
+* Marshaling and unmarshaling to and from data structures
+* Line & column position data for all parsed elements
+* [Query support similar to JSON-Path](query/)
+* Syntax errors contain line and column numbers
+
+## Import
+
+```go
+import "github.com/pelletier/go-toml"
+```
+
+## Usage example
+
+Read a TOML document:
+
+```go
+config, _ := toml.Load(`
+[postgres]
+user = "pelletier"
+password = "mypassword"`)
+// retrieve data directly
+user := config.Get("postgres.user").(string)
+
+// or using an intermediate object
+postgresConfig := config.Get("postgres").(*toml.Tree)
+password := postgresConfig.Get("password").(string)
+```
+
+Or use Unmarshal:
+
+```go
+type Postgres struct {
+    User     string
+    Password string
+}
+type Config struct {
+    Postgres Postgres
+}
+
+doc := []byte(`
+[Postgres]
+User = "pelletier"
+Password = "mypassword"`)
+
+config := Config{}
+toml.Unmarshal(doc, &config)
+fmt.Println("user=", config.Postgres.User)
+```
+
+Or use a query:
+
+```go
+// use a query to gather elements without walking the tree
+q, _ := query.Compile("$..[user,password]")
+results := q.Execute(config)
+for ii, item := range results.Values() {
+    fmt.Printf("Query result %d: %v\n", ii, item)
+}
+```
+
+## Documentation
+
+The documentation and additional examples are available at
+[godoc.org](http://godoc.org/github.com/pelletier/go-toml).
+
+## Tools
+
+Go-toml provides two handy command line tools:
+
+* `tomll`: Reads TOML files and lints them.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/tomll
+    tomll --help
+    ```
+* `tomljson`: Reads a TOML file and outputs its JSON representation.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/tomljson
+    tomljson --help
+    ```
+
+ * `jsontoml`: Reads a JSON file and outputs a TOML representation.
+
+    ```
+    go install github.com/pelletier/go-toml/cmd/jsontoml
+    jsontoml --help
+    ```
+
+### Docker image
+
+Those tools are also availble as a Docker image from
+[dockerhub](https://hub.docker.com/r/pelletier/go-toml). For example, to
+use `tomljson`:
+
+```
+docker run -v $PWD:/workdir pelletier/go-toml tomljson /workdir/example.toml
+```
+
+Only master (`latest`) and tagged versions are published to dockerhub. You
+can build your own image as usual:
+
+```
+docker build -t go-toml .
+```
+
+## Contribute
+
+Feel free to report bugs and patches using GitHub's pull requests system on
+[pelletier/go-toml](https://github.com/pelletier/go-toml). Any feedback would be
+much appreciated!
+
+### Run tests
+
+`go test ./...`
+
+### Fuzzing
+
+The script `./fuzz.sh` is available to
+run [go-fuzz](https://github.com/dvyukov/go-fuzz) on go-toml.
+
+## Versioning
+
+Go-toml follows [Semantic Versioning](http://semver.org/). The supported version
+of [TOML](https://github.com/toml-lang/toml) is indicated at the beginning of
+this document. The last two major versions of Go are supported
+(see [Go Release Policy](https://golang.org/doc/devel/release.html#policy)).
+
+## License
+
+The MIT License (MIT). Read [LICENSE](LICENSE).
--- a/vendor/github.com/pelletier/go-toml/azure-pipelines.yml
+++ b/vendor/github.com/pelletier/go-toml/azure-pipelines.yml
@ -0,0 +1,230 @@
+trigger:
+- master
+
+stages:
+- stage: fuzzit
+  displayName: "Run Fuzzit"
+  dependsOn: []
+  condition: and(succeeded(), eq(variables['Build.SourceBranchName'], 'master'))
+  jobs:
+  - job: submit
+    displayName: "Submit"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.15"
+      inputs:
+        version: "1.15"
+    - script: echo "##vso[task.setvariable variable=PATH]${PATH}:/home/vsts/go/bin/"
+    - script: mkdir -p ${HOME}/go/src/github.com/pelletier/go-toml
+    - script: cp -R . ${HOME}/go/src/github.com/pelletier/go-toml
+    - task: Bash@3
+      inputs:
+        filePath: './fuzzit.sh'
+      env:
+        TYPE: fuzzing
+        FUZZIT_API_KEY: $(FUZZIT_API_KEY)
+
+- stage: run_checks
+  displayName: "Check"
+  dependsOn: []
+  jobs:
+  - job: fmt
+    displayName: "fmt"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.15"
+      inputs:
+        version: "1.15"
+    - task: Go@0
+      displayName: "go fmt ./..."
+      inputs:
+        command: 'custom'
+        customCommand: 'fmt'
+        arguments: './...'
+  - job: coverage
+    displayName: "coverage"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.15"
+      inputs:
+        version: "1.15"
+    - task: Go@0
+      displayName: "Generate coverage"
+      inputs:
+        command: 'test'
+        arguments: "-race -coverprofile=coverage.txt -covermode=atomic"
+    - task: Bash@3
+      inputs:
+        targetType: 'inline'
+        script: 'bash <(curl -s https://codecov.io/bash) -t ${CODECOV_TOKEN}'
+      env:
+        CODECOV_TOKEN: $(CODECOV_TOKEN)
+  - job: benchmark
+    displayName: "benchmark"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.15"
+      inputs:
+        version: "1.15"
+    - script: echo "##vso[task.setvariable variable=PATH]${PATH}:/home/vsts/go/bin/"
+    - task: Bash@3
+      inputs:
+        filePath: './benchmark.sh'
+        arguments: "master $(Build.Repository.Uri)"
+
+  - job: fuzzing
+    displayName: "fuzzing"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go 1.15"
+      inputs:
+        version: "1.15"
+    - script: echo "##vso[task.setvariable variable=PATH]${PATH}:/home/vsts/go/bin/"
+    - script: mkdir -p ${HOME}/go/src/github.com/pelletier/go-toml
+    - script: cp -R . ${HOME}/go/src/github.com/pelletier/go-toml
+    - task: Bash@3
+      inputs:
+        filePath: './fuzzit.sh'
+      env:
+        TYPE: local-regression
+
+  - job: go_unit_tests
+    displayName: "unit tests"
+    strategy:
+      matrix:
+        linux 1.15:
+          goVersion: '1.15'
+          imageName: 'ubuntu-latest'
+        mac 1.15:
+          goVersion: '1.15'
+          imageName: 'macOS-latest'
+        windows 1.15:
+          goVersion: '1.15'
+          imageName: 'windows-latest'
+        linux 1.14:
+          goVersion: '1.14'
+          imageName: 'ubuntu-latest'
+        mac 1.14:
+          goVersion: '1.14'
+          imageName: 'macOS-latest'
+        windows 1.14:
+          goVersion: '1.14'
+          imageName: 'windows-latest'
+    pool:
+      vmImage: $(imageName)
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go $(goVersion)"
+      inputs:
+        version: $(goVersion)
+    - task: Go@0
+      displayName: "go test ./..."
+      inputs:
+        command: 'test'
+        arguments: './...'
+- stage: build_binaries
+  displayName: "Build binaries"
+  dependsOn: run_checks
+  jobs:
+  - job: build_binary
+    displayName: "Build binary"
+    strategy:
+      matrix:
+        linux_amd64:
+          GOOS: linux
+          GOARCH: amd64
+        darwin_amd64:
+          GOOS: darwin
+          GOARCH: amd64
+        windows_amd64:
+          GOOS: windows
+          GOARCH: amd64
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: GoTool@0
+      displayName: "Install Go"
+      inputs:
+        version: 1.15
+    - task: Bash@3
+      inputs:
+        targetType: inline
+        script: "make dist"
+      env:
+        go.goos: $(GOOS)
+        go.goarch: $(GOARCH)
+    - task: CopyFiles@2
+      inputs:
+        sourceFolder: '$(Build.SourcesDirectory)'
+        contents: '*.tar.xz'
+        TargetFolder: '$(Build.ArtifactStagingDirectory)'
+    - task: PublishBuildArtifacts@1
+      inputs:
+        pathtoPublish: '$(Build.ArtifactStagingDirectory)'
+        artifactName: binaries
+- stage: build_binaries_manifest
+  displayName: "Build binaries manifest"
+  dependsOn: build_binaries
+  jobs:
+  - job: build_manifest
+    displayName: "Build binaries manifest"
+    steps:
+      - task: DownloadBuildArtifacts@0
+        inputs:
+          buildType: 'current'
+          downloadType: 'single'
+          artifactName: 'binaries'
+          downloadPath: '$(Build.SourcesDirectory)'
+      - task: Bash@3
+        inputs:
+          targetType: inline
+          script: "cd binaries && sha256sum --binary *.tar.xz | tee $(Build.ArtifactStagingDirectory)/sha256sums.txt"
+      - task: PublishBuildArtifacts@1
+        inputs:
+          pathtoPublish: '$(Build.ArtifactStagingDirectory)'
+          artifactName: manifest
+
+- stage: build_docker_image
+  displayName: "Build Docker image"
+  dependsOn: run_checks
+  jobs:
+  - job: build
+    displayName: "Build"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: Docker@2
+      inputs:
+        command: 'build'
+        Dockerfile: 'Dockerfile'
+        buildContext: '.'
+        addPipelineData: false
+
+- stage: publish_docker_image
+  displayName: "Publish Docker image"
+  dependsOn: build_docker_image
+  condition: and(succeeded(), eq(variables['Build.SourceBranchName'], 'master'))
+  jobs:
+  - job: publish
+    displayName: "Publish"
+    pool:
+      vmImage: ubuntu-latest
+    steps:
+    - task: Docker@2
+      inputs:
+        containerRegistry: 'DockerHub'
+        repository: 'pelletier/go-toml'
+        command: 'buildAndPush'
+        Dockerfile: 'Dockerfile'
+        buildContext: '.'
+        tags: 'latest'
--- a/vendor/github.com/pelletier/go-toml/benchmark.sh
+++ b/vendor/github.com/pelletier/go-toml/benchmark.sh
@ -0,0 +1,35 @@
+#!/bin/bash
+
+set -ex
+
+reference_ref=${1:-master}
+reference_git=${2:-.}
+
+if ! `hash benchstat 2>/dev/null`; then
+    echo "Installing benchstat"
+    go get golang.org/x/perf/cmd/benchstat
+fi
+
+tempdir=`mktemp -d /tmp/go-toml-benchmark-XXXXXX`
+ref_tempdir="${tempdir}/ref"
+ref_benchmark="${ref_tempdir}/benchmark-`echo -n ${reference_ref}|tr -s '/' '-'`.txt"
+local_benchmark="`pwd`/benchmark-local.txt"
+
+echo "=== ${reference_ref} (${ref_tempdir})"
+git clone ${reference_git} ${ref_tempdir} >/dev/null 2>/dev/null
+pushd ${ref_tempdir} >/dev/null
+git checkout ${reference_ref} >/dev/null 2>/dev/null
+go test -bench=. -benchmem | tee ${ref_benchmark}
+cd benchmark
+go test -bench=. -benchmem | tee -a ${ref_benchmark}
+popd >/dev/null
+
+echo ""
+echo "=== local"
+go test -bench=. -benchmem  | tee ${local_benchmark}
+cd benchmark
+go test -bench=. -benchmem | tee -a ${local_benchmark}
+
+echo ""
+echo "=== diff"
+benchstat -delta-test=none ${ref_benchmark} ${local_benchmark}
--- a/vendor/github.com/pelletier/go-toml/doc.go
+++ b/vendor/github.com/pelletier/go-toml/doc.go
@ -0,0 +1,23 @@
+// Package toml is a TOML parser and manipulation library.
+//
+// This version supports the specification as described in
+// https://github.com/toml-lang/toml/blob/master/versions/en/toml-v0.5.0.md
+//
+// Marshaling
+//
+// Go-toml can marshal and unmarshal TOML documents from and to data
+// structures.
+//
+// TOML document as a tree
+//
+// Go-toml can operate on a TOML document as a tree. Use one of the Load*
+// functions to parse TOML data and obtain a Tree instance, then one of its
+// methods to manipulate the tree.
+//
+// JSONPath-like queries
+//
+// The package github.com/pelletier/go-toml/query implements a system
+// similar to JSONPath to quickly retrieve elements of a TOML document using a
+// single expression. See the package documentation for more information.
+//
+package toml
--- a/vendor/github.com/pelletier/go-toml/example-crlf.toml
+++ b/vendor/github.com/pelletier/go-toml/example-crlf.toml
@ -0,0 +1,30 @@
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
+score = 4e-08 # to make sure leading zeroes in exponent parts of floats are supported
--- a/vendor/github.com/pelletier/go-toml/example.toml
+++ b/vendor/github.com/pelletier/go-toml/example.toml
@ -0,0 +1,30 @@
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
+score = 4e-08 # to make sure leading zeroes in exponent parts of floats are supported
--- a/vendor/github.com/pelletier/go-toml/fuzz.go
+++ b/vendor/github.com/pelletier/go-toml/fuzz.go
@ -0,0 +1,31 @@
+// +build gofuzz
+
+package toml
+
+func Fuzz(data []byte) int {
+	tree, err := LoadBytes(data)
+	if err != nil {
+		if tree != nil {
+			panic("tree must be nil if there is an error")
+		}
+		return 0
+	}
+
+	str, err := tree.ToTomlString()
+	if err != nil {
+		if str != "" {
+			panic(`str must be "" if there is an error`)
+		}
+		panic(err)
+	}
+
+	tree, err = Load(str)
+	if err != nil {
+		if tree != nil {
+			panic("tree must be nil if there is an error")
+		}
+		return 0
+	}
+
+	return 1
+}
--- a/vendor/github.com/pelletier/go-toml/fuzz.sh
+++ b/vendor/github.com/pelletier/go-toml/fuzz.sh
@ -0,0 +1,15 @@
+#! /bin/sh
+set -eu
+
+go get github.com/dvyukov/go-fuzz/go-fuzz
+go get github.com/dvyukov/go-fuzz/go-fuzz-build
+
+if [ ! -e toml-fuzz.zip ]; then
+    go-fuzz-build github.com/pelletier/go-toml
+fi
+
+rm -fr fuzz
+mkdir -p fuzz/corpus
+cp *.toml fuzz/corpus
+
+go-fuzz -bin=toml-fuzz.zip -workdir=fuzz
--- a/vendor/github.com/pelletier/go-toml/fuzzit.sh
+++ b/vendor/github.com/pelletier/go-toml/fuzzit.sh
@ -0,0 +1,26 @@
+#!/bin/bash
+set -xe
+
+# go-fuzz doesn't support modules yet, so ensure we do everything
+# in the old style GOPATH way
+export GO111MODULE="off"
+
+# install go-fuzz
+go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-build
+
+# target name can only contain lower-case letters (a-z), digits (0-9) and a dash (-)
+# to add another target, make sure to create it with `fuzzit create target`
+# before using `fuzzit create job`
+TARGET=toml-fuzzer
+
+go-fuzz-build -libfuzzer -o ${TARGET}.a github.com/pelletier/go-toml
+clang -fsanitize=fuzzer ${TARGET}.a -o ${TARGET}
+
+# install fuzzit for talking to fuzzit.dev service
+# or latest version:
+# https://github.com/fuzzitdev/fuzzit/releases/latest/download/fuzzit_Linux_x86_64
+wget -q -O fuzzit https://github.com/fuzzitdev/fuzzit/releases/download/v2.4.52/fuzzit_Linux_x86_64
+chmod a+x fuzzit
+
+# TODO: change kkowalczyk to go-toml and create toml-fuzzer target there
+./fuzzit create job --type $TYPE go-toml/${TARGET} ${TARGET}
--- a/vendor/github.com/pelletier/go-toml/go.mod
+++ b/vendor/github.com/pelletier/go-toml/go.mod
@ -0,0 +1,5 @@
+module github.com/pelletier/go-toml
+
+go 1.12
+
+require github.com/davecgh/go-spew v1.1.1
--- a/vendor/github.com/pelletier/go-toml/go.sum
+++ b/vendor/github.com/pelletier/go-toml/go.sum
@ -0,0 +1,19 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.3 h1:fvjTMHxHEw/mxHbtzPi3JCcKXQRAnQTBRo6YCJSVHKI=
+gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.4 h1:/eiJrUcujPVeJ3xlSWaiNi3uSVmDGBK1pDHUHAnao1I=
+gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.5 h1:ymVxjfMaHvXD8RqPRmzHHsB3VvucivSkIAvJFDI5O3c=
+gopkg.in/yaml.v2 v2.2.5/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.7 h1:VUgggvou5XRW9mHwD/yXxIYSMtY0zoKQf/v226p2nyo=
+gopkg.in/yaml.v2 v2.2.7/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
+gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
--- a/vendor/github.com/pelletier/go-toml/keysparsing.go
+++ b/vendor/github.com/pelletier/go-toml/keysparsing.go
@ -0,0 +1,112 @@
+// Parsing keys handling both bare and quoted keys.
+
+package toml
+
+import (
+	"errors"
+	"fmt"
+)
+
+// Convert the bare key group string to an array.
+// The input supports double quotation and single quotation,
+// but escape sequences are not supported. Lexers must unescape them beforehand.
+func parseKey(key string) ([]string, error) {
+	runes := []rune(key)
+	var groups []string
+
+	if len(key) == 0 {
+		return nil, errors.New("empty key")
+	}
+
+	idx := 0
+	for idx < len(runes) {
+		for ; idx < len(runes) && isSpace(runes[idx]); idx++ {
+			// skip leading whitespace
+		}
+		if idx >= len(runes) {
+			break
+		}
+		r := runes[idx]
+		if isValidBareChar(r) {
+			// parse bare key
+			startIdx := idx
+			endIdx := -1
+			idx++
+			for idx < len(runes) {
+				r = runes[idx]
+				if isValidBareChar(r) {
+					idx++
+				} else if r == '.' {
+					endIdx = idx
+					break
+				} else if isSpace(r) {
+					endIdx = idx
+					for ; idx < len(runes) && isSpace(runes[idx]); idx++ {
+						// skip trailing whitespace
+					}
+					if idx < len(runes) && runes[idx] != '.' {
+						return nil, fmt.Errorf("invalid key character after whitespace: %c", runes[idx])
+					}
+					break
+				} else {
+					return nil, fmt.Errorf("invalid bare key character: %c", r)
+				}
+			}
+			if endIdx == -1 {
+				endIdx = idx
+			}
+			groups = append(groups, string(runes[startIdx:endIdx]))
+		} else if r == '\'' {
+			// parse single quoted key
+			idx++
+			startIdx := idx
+			for {
+				if idx >= len(runes) {
+					return nil, fmt.Errorf("unclosed single-quoted key")
+				}
+				r = runes[idx]
+				if r == '\'' {
+					groups = append(groups, string(runes[startIdx:idx]))
+					idx++
+					break
+				}
+				idx++
+			}
+		} else if r == '"' {
+			// parse double quoted key
+			idx++
+			startIdx := idx
+			for {
+				if idx >= len(runes) {
+					return nil, fmt.Errorf("unclosed double-quoted key")
+				}
+				r = runes[idx]
+				if r == '"' {
+					groups = append(groups, string(runes[startIdx:idx]))
+					idx++
+					break
+				}
+				idx++
+			}
+		} else if r == '.' {
+			idx++
+			if idx >= len(runes) {
+				return nil, fmt.Errorf("unexpected end of key")
+			}
+			r = runes[idx]
+			if !isValidBareChar(r) && r != '\'' && r != '"' && r != ' ' {
+				return nil, fmt.Errorf("expecting key part after dot")
+			}
+		} else {
+			return nil, fmt.Errorf("invalid key character: %c", r)
+		}
+	}
+	if len(groups) == 0 {
+		return nil, fmt.Errorf("empty key")
+	}
+	return groups, nil
+}
+
+func isValidBareChar(r rune) bool {
+	return isAlphanumeric(r) || r == '-' || isDigit(r)
+}
--- a/vendor/github.com/pelletier/go-toml/lexer.go
+++ b/vendor/github.com/pelletier/go-toml/lexer.go
@ -0,0 +1,807 @@
+// TOML lexer.
+//
+// Written using the principles developed by Rob Pike in
+// http://www.youtube.com/watch?v=HxaD_trXwRE
+
+package toml
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+var dateRegexp *regexp.Regexp
+
+// Define state functions
+type tomlLexStateFn func() tomlLexStateFn
+
+// Define lexer
+type tomlLexer struct {
+	inputIdx          int
+	input             []rune // Textual source
+	currentTokenStart int
+	currentTokenStop  int
+	tokens            []token
+	brackets          []rune
+	line              int
+	col               int
+	endbufferLine     int
+	endbufferCol      int
+}
+
+// Basic read operations on input
+
+func (l *tomlLexer) read() rune {
+	r := l.peek()
+	if r == '\n' {
+		l.endbufferLine++
+		l.endbufferCol = 1
+	} else {
+		l.endbufferCol++
+	}
+	l.inputIdx++
+	return r
+}
+
+func (l *tomlLexer) next() rune {
+	r := l.read()
+
+	if r != eof {
+		l.currentTokenStop++
+	}
+	return r
+}
+
+func (l *tomlLexer) ignore() {
+	l.currentTokenStart = l.currentTokenStop
+	l.line = l.endbufferLine
+	l.col = l.endbufferCol
+}
+
+func (l *tomlLexer) skip() {
+	l.next()
+	l.ignore()
+}
+
+func (l *tomlLexer) fastForward(n int) {
+	for i := 0; i < n; i++ {
+		l.next()
+	}
+}
+
+func (l *tomlLexer) emitWithValue(t tokenType, value string) {
+	l.tokens = append(l.tokens, token{
+		Position: Position{l.line, l.col},
+		typ:      t,
+		val:      value,
+	})
+	l.ignore()
+}
+
+func (l *tomlLexer) emit(t tokenType) {
+	l.emitWithValue(t, string(l.input[l.currentTokenStart:l.currentTokenStop]))
+}
+
+func (l *tomlLexer) peek() rune {
+	if l.inputIdx >= len(l.input) {
+		return eof
+	}
+	return l.input[l.inputIdx]
+}
+
+func (l *tomlLexer) peekString(size int) string {
+	maxIdx := len(l.input)
+	upperIdx := l.inputIdx + size // FIXME: potential overflow
+	if upperIdx > maxIdx {
+		upperIdx = maxIdx
+	}
+	return string(l.input[l.inputIdx:upperIdx])
+}
+
+func (l *tomlLexer) follow(next string) bool {
+	return next == l.peekString(len(next))
+}
+
+// Error management
+
+func (l *tomlLexer) errorf(format string, args ...interface{}) tomlLexStateFn {
+	l.tokens = append(l.tokens, token{
+		Position: Position{l.line, l.col},
+		typ:      tokenError,
+		val:      fmt.Sprintf(format, args...),
+	})
+	return nil
+}
+
+// State functions
+
+func (l *tomlLexer) lexVoid() tomlLexStateFn {
+	for {
+		next := l.peek()
+		switch next {
+		case '}': // after '{'
+			return l.lexRightCurlyBrace
+		case '[':
+			return l.lexTableKey
+		case '#':
+			return l.lexComment(l.lexVoid)
+		case '=':
+			return l.lexEqual
+		case '\r':
+			fallthrough
+		case '\n':
+			l.skip()
+			continue
+		}
+
+		if isSpace(next) {
+			l.skip()
+		}
+
+		if isKeyStartChar(next) {
+			return l.lexKey
+		}
+
+		if next == eof {
+			l.next()
+			break
+		}
+	}
+
+	l.emit(tokenEOF)
+	return nil
+}
+
+func (l *tomlLexer) lexRvalue() tomlLexStateFn {
+	for {
+		next := l.peek()
+		switch next {
+		case '.':
+			return l.errorf("cannot start float with a dot")
+		case '=':
+			return l.lexEqual
+		case '[':
+			return l.lexLeftBracket
+		case ']':
+			return l.lexRightBracket
+		case '{':
+			return l.lexLeftCurlyBrace
+		case '}':
+			return l.lexRightCurlyBrace
+		case '#':
+			return l.lexComment(l.lexRvalue)
+		case '"':
+			return l.lexString
+		case '\'':
+			return l.lexLiteralString
+		case ',':
+			return l.lexComma
+		case '\r':
+			fallthrough
+		case '\n':
+			l.skip()
+			if len(l.brackets) > 0 && l.brackets[len(l.brackets)-1] == '[' {
+				return l.lexRvalue
+			}
+			return l.lexVoid
+		}
+
+		if l.follow("true") {
+			return l.lexTrue
+		}
+
+		if l.follow("false") {
+			return l.lexFalse
+		}
+
+		if l.follow("inf") {
+			return l.lexInf
+		}
+
+		if l.follow("nan") {
+			return l.lexNan
+		}
+
+		if isSpace(next) {
+			l.skip()
+			continue
+		}
+
+		if next == eof {
+			l.next()
+			break
+		}
+
+		possibleDate := l.peekString(35)
+		dateSubmatches := dateRegexp.FindStringSubmatch(possibleDate)
+		if dateSubmatches != nil && dateSubmatches[0] != "" {
+			l.fastForward(len(dateSubmatches[0]))
+			if dateSubmatches[2] == "" { // no timezone information => local date
+				return l.lexLocalDate
+			}
+			return l.lexDate
+		}
+
+		if next == '+' || next == '-' || isDigit(next) {
+			return l.lexNumber
+		}
+
+		return l.errorf("no value can start with %c", next)
+	}
+
+	l.emit(tokenEOF)
+	return nil
+}
+
+func (l *tomlLexer) lexLeftCurlyBrace() tomlLexStateFn {
+	l.next()
+	l.emit(tokenLeftCurlyBrace)
+	l.brackets = append(l.brackets, '{')
+	return l.lexVoid
+}
+
+func (l *tomlLexer) lexRightCurlyBrace() tomlLexStateFn {
+	l.next()
+	l.emit(tokenRightCurlyBrace)
+	if len(l.brackets) == 0 || l.brackets[len(l.brackets)-1] != '{' {
+		return l.errorf("cannot have '}' here")
+	}
+	l.brackets = l.brackets[:len(l.brackets)-1]
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexDate() tomlLexStateFn {
+	l.emit(tokenDate)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexLocalDate() tomlLexStateFn {
+	l.emit(tokenLocalDate)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexTrue() tomlLexStateFn {
+	l.fastForward(4)
+	l.emit(tokenTrue)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexFalse() tomlLexStateFn {
+	l.fastForward(5)
+	l.emit(tokenFalse)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexInf() tomlLexStateFn {
+	l.fastForward(3)
+	l.emit(tokenInf)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexNan() tomlLexStateFn {
+	l.fastForward(3)
+	l.emit(tokenNan)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexEqual() tomlLexStateFn {
+	l.next()
+	l.emit(tokenEqual)
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexComma() tomlLexStateFn {
+	l.next()
+	l.emit(tokenComma)
+	if len(l.brackets) > 0 && l.brackets[len(l.brackets)-1] == '{' {
+		return l.lexVoid
+	}
+	return l.lexRvalue
+}
+
+// Parse the key and emits its value without escape sequences.
+// bare keys, basic string keys and literal string keys are supported.
+func (l *tomlLexer) lexKey() tomlLexStateFn {
+	var sb strings.Builder
+
+	for r := l.peek(); isKeyChar(r) || r == '\n' || r == '\r'; r = l.peek() {
+		if r == '"' {
+			l.next()
+			str, err := l.lexStringAsString(`"`, false, true)
+			if err != nil {
+				return l.errorf(err.Error())
+			}
+			sb.WriteString("\"")
+			sb.WriteString(str)
+			sb.WriteString("\"")
+			l.next()
+			continue
+		} else if r == '\'' {
+			l.next()
+			str, err := l.lexLiteralStringAsString(`'`, false)
+			if err != nil {
+				return l.errorf(err.Error())
+			}
+			sb.WriteString("'")
+			sb.WriteString(str)
+			sb.WriteString("'")
+			l.next()
+			continue
+		} else if r == '\n' {
+			return l.errorf("keys cannot contain new lines")
+		} else if isSpace(r) {
+			var str strings.Builder
+			str.WriteString(" ")
+
+			// skip trailing whitespace
+			l.next()
+			for r = l.peek(); isSpace(r); r = l.peek() {
+				str.WriteRune(r)
+				l.next()
+			}
+			// break loop if not a dot
+			if r != '.' {
+				break
+			}
+			str.WriteString(".")
+			// skip trailing whitespace after dot
+			l.next()
+			for r = l.peek(); isSpace(r); r = l.peek() {
+				str.WriteRune(r)
+				l.next()
+			}
+			sb.WriteString(str.String())
+			continue
+		} else if r == '.' {
+			// skip
+		} else if !isValidBareChar(r) {
+			return l.errorf("keys cannot contain %c character", r)
+		}
+		sb.WriteRune(r)
+		l.next()
+	}
+	l.emitWithValue(tokenKey, sb.String())
+	return l.lexVoid
+}
+
+func (l *tomlLexer) lexComment(previousState tomlLexStateFn) tomlLexStateFn {
+	return func() tomlLexStateFn {
+		for next := l.peek(); next != '\n' && next != eof; next = l.peek() {
+			if next == '\r' && l.follow("\r\n") {
+				break
+			}
+			l.next()
+		}
+		l.ignore()
+		return previousState
+	}
+}
+
+func (l *tomlLexer) lexLeftBracket() tomlLexStateFn {
+	l.next()
+	l.emit(tokenLeftBracket)
+	l.brackets = append(l.brackets, '[')
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexLiteralStringAsString(terminator string, discardLeadingNewLine bool) (string, error) {
+	var sb strings.Builder
+
+	if discardLeadingNewLine {
+		if l.follow("\r\n") {
+			l.skip()
+			l.skip()
+		} else if l.peek() == '\n' {
+			l.skip()
+		}
+	}
+
+	// find end of string
+	for {
+		if l.follow(terminator) {
+			return sb.String(), nil
+		}
+
+		next := l.peek()
+		if next == eof {
+			break
+		}
+		sb.WriteRune(l.next())
+	}
+
+	return "", errors.New("unclosed string")
+}
+
+func (l *tomlLexer) lexLiteralString() tomlLexStateFn {
+	l.skip()
+
+	// handle special case for triple-quote
+	terminator := "'"
+	discardLeadingNewLine := false
+	if l.follow("''") {
+		l.skip()
+		l.skip()
+		terminator = "'''"
+		discardLeadingNewLine = true
+	}
+
+	str, err := l.lexLiteralStringAsString(terminator, discardLeadingNewLine)
+	if err != nil {
+		return l.errorf(err.Error())
+	}
+
+	l.emitWithValue(tokenString, str)
+	l.fastForward(len(terminator))
+	l.ignore()
+	return l.lexRvalue
+}
+
+// Lex a string and return the results as a string.
+// Terminator is the substring indicating the end of the token.
+// The resulting string does not include the terminator.
+func (l *tomlLexer) lexStringAsString(terminator string, discardLeadingNewLine, acceptNewLines bool) (string, error) {
+	var sb strings.Builder
+
+	if discardLeadingNewLine {
+		if l.follow("\r\n") {
+			l.skip()
+			l.skip()
+		} else if l.peek() == '\n' {
+			l.skip()
+		}
+	}
+
+	for {
+		if l.follow(terminator) {
+			return sb.String(), nil
+		}
+
+		if l.follow("\\") {
+			l.next()
+			switch l.peek() {
+			case '\r':
+				fallthrough
+			case '\n':
+				fallthrough
+			case '\t':
+				fallthrough
+			case ' ':
+				// skip all whitespace chars following backslash
+				for strings.ContainsRune("\r\n\t ", l.peek()) {
+					l.next()
+				}
+			case '"':
+				sb.WriteString("\"")
+				l.next()
+			case 'n':
+				sb.WriteString("\n")
+				l.next()
+			case 'b':
+				sb.WriteString("\b")
+				l.next()
+			case 'f':
+				sb.WriteString("\f")
+				l.next()
+			case '/':
+				sb.WriteString("/")
+				l.next()
+			case 't':
+				sb.WriteString("\t")
+				l.next()
+			case 'r':
+				sb.WriteString("\r")
+				l.next()
+			case '\\':
+				sb.WriteString("\\")
+				l.next()
+			case 'u':
+				l.next()
+				var code strings.Builder
+				for i := 0; i < 4; i++ {
+					c := l.peek()
+					if !isHexDigit(c) {
+						return "", errors.New("unfinished unicode escape")
+					}
+					l.next()
+					code.WriteRune(c)
+				}
+				intcode, err := strconv.ParseInt(code.String(), 16, 32)
+				if err != nil {
+					return "", errors.New("invalid unicode escape: \\u" + code.String())
+				}
+				sb.WriteRune(rune(intcode))
+			case 'U':
+				l.next()
+				var code strings.Builder
+				for i := 0; i < 8; i++ {
+					c := l.peek()
+					if !isHexDigit(c) {
+						return "", errors.New("unfinished unicode escape")
+					}
+					l.next()
+					code.WriteRune(c)
+				}
+				intcode, err := strconv.ParseInt(code.String(), 16, 64)
+				if err != nil {
+					return "", errors.New("invalid unicode escape: \\U" + code.String())
+				}
+				sb.WriteRune(rune(intcode))
+			default:
+				return "", errors.New("invalid escape sequence: \\" + string(l.peek()))
+			}
+		} else {
+			r := l.peek()
+
+			if 0x00 <= r && r <= 0x1F && r != '\t' && !(acceptNewLines && (r == '\n' || r == '\r')) {
+				return "", fmt.Errorf("unescaped control character %U", r)
+			}
+			l.next()
+			sb.WriteRune(r)
+		}
+
+		if l.peek() == eof {
+			break
+		}
+	}
+
+	return "", errors.New("unclosed string")
+}
+
+func (l *tomlLexer) lexString() tomlLexStateFn {
+	l.skip()
+
+	// handle special case for triple-quote
+	terminator := `"`
+	discardLeadingNewLine := false
+	acceptNewLines := false
+	if l.follow(`""`) {
+		l.skip()
+		l.skip()
+		terminator = `"""`
+		discardLeadingNewLine = true
+		acceptNewLines = true
+	}
+
+	str, err := l.lexStringAsString(terminator, discardLeadingNewLine, acceptNewLines)
+	if err != nil {
+		return l.errorf(err.Error())
+	}
+
+	l.emitWithValue(tokenString, str)
+	l.fastForward(len(terminator))
+	l.ignore()
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) lexTableKey() tomlLexStateFn {
+	l.next()
+
+	if l.peek() == '[' {
+		// token '[[' signifies an array of tables
+		l.next()
+		l.emit(tokenDoubleLeftBracket)
+		return l.lexInsideTableArrayKey
+	}
+	// vanilla table key
+	l.emit(tokenLeftBracket)
+	return l.lexInsideTableKey
+}
+
+// Parse the key till "]]", but only bare keys are supported
+func (l *tomlLexer) lexInsideTableArrayKey() tomlLexStateFn {
+	for r := l.peek(); r != eof; r = l.peek() {
+		switch r {
+		case ']':
+			if l.currentTokenStop > l.currentTokenStart {
+				l.emit(tokenKeyGroupArray)
+			}
+			l.next()
+			if l.peek() != ']' {
+				break
+			}
+			l.next()
+			l.emit(tokenDoubleRightBracket)
+			return l.lexVoid
+		case '[':
+			return l.errorf("table array key cannot contain ']'")
+		default:
+			l.next()
+		}
+	}
+	return l.errorf("unclosed table array key")
+}
+
+// Parse the key till "]" but only bare keys are supported
+func (l *tomlLexer) lexInsideTableKey() tomlLexStateFn {
+	for r := l.peek(); r != eof; r = l.peek() {
+		switch r {
+		case ']':
+			if l.currentTokenStop > l.currentTokenStart {
+				l.emit(tokenKeyGroup)
+			}
+			l.next()
+			l.emit(tokenRightBracket)
+			return l.lexVoid
+		case '[':
+			return l.errorf("table key cannot contain ']'")
+		default:
+			l.next()
+		}
+	}
+	return l.errorf("unclosed table key")
+}
+
+func (l *tomlLexer) lexRightBracket() tomlLexStateFn {
+	l.next()
+	l.emit(tokenRightBracket)
+	if len(l.brackets) == 0 || l.brackets[len(l.brackets)-1] != '[' {
+		return l.errorf("cannot have ']' here")
+	}
+	l.brackets = l.brackets[:len(l.brackets)-1]
+	return l.lexRvalue
+}
+
+type validRuneFn func(r rune) bool
+
+func isValidHexRune(r rune) bool {
+	return r >= 'a' && r <= 'f' ||
+		r >= 'A' && r <= 'F' ||
+		r >= '0' && r <= '9' ||
+		r == '_'
+}
+
+func isValidOctalRune(r rune) bool {
+	return r >= '0' && r <= '7' || r == '_'
+}
+
+func isValidBinaryRune(r rune) bool {
+	return r == '0' || r == '1' || r == '_'
+}
+
+func (l *tomlLexer) lexNumber() tomlLexStateFn {
+	r := l.peek()
+
+	if r == '0' {
+		follow := l.peekString(2)
+		if len(follow) == 2 {
+			var isValidRune validRuneFn
+			switch follow[1] {
+			case 'x':
+				isValidRune = isValidHexRune
+			case 'o':
+				isValidRune = isValidOctalRune
+			case 'b':
+				isValidRune = isValidBinaryRune
+			default:
+				if follow[1] >= 'a' && follow[1] <= 'z' || follow[1] >= 'A' && follow[1] <= 'Z' {
+					return l.errorf("unknown number base: %s. possible options are x (hex) o (octal) b (binary)", string(follow[1]))
+				}
+			}
+
+			if isValidRune != nil {
+				l.next()
+				l.next()
+				digitSeen := false
+				for {
+					next := l.peek()
+					if !isValidRune(next) {
+						break
+					}
+					digitSeen = true
+					l.next()
+				}
+
+				if !digitSeen {
+					return l.errorf("number needs at least one digit")
+				}
+
+				l.emit(tokenInteger)
+
+				return l.lexRvalue
+			}
+		}
+	}
+
+	if r == '+' || r == '-' {
+		l.next()
+		if l.follow("inf") {
+			return l.lexInf
+		}
+		if l.follow("nan") {
+			return l.lexNan
+		}
+	}
+
+	pointSeen := false
+	expSeen := false
+	digitSeen := false
+	for {
+		next := l.peek()
+		if next == '.' {
+			if pointSeen {
+				return l.errorf("cannot have two dots in one float")
+			}
+			l.next()
+			if !isDigit(l.peek()) {
+				return l.errorf("float cannot end with a dot")
+			}
+			pointSeen = true
+		} else if next == 'e' || next == 'E' {
+			expSeen = true
+			l.next()
+			r := l.peek()
+			if r == '+' || r == '-' {
+				l.next()
+			}
+		} else if isDigit(next) {
+			digitSeen = true
+			l.next()
+		} else if next == '_' {
+			l.next()
+		} else {
+			break
+		}
+		if pointSeen && !digitSeen {
+			return l.errorf("cannot start float with a dot")
+		}
+	}
+
+	if !digitSeen {
+		return l.errorf("no digit in that number")
+	}
+	if pointSeen || expSeen {
+		l.emit(tokenFloat)
+	} else {
+		l.emit(tokenInteger)
+	}
+	return l.lexRvalue
+}
+
+func (l *tomlLexer) run() {
+	for state := l.lexVoid; state != nil; {
+		state = state()
+	}
+}
+
+func init() {
+	// Regexp for all date/time formats supported by TOML.
+	// Group 1: nano precision
+	// Group 2: timezone
+	//
+	// /!\ also matches the empty string
+	//
+	// Example matches:
+	// 1979-05-27T07:32:00Z
+	// 1979-05-27T00:32:00-07:00
+	// 1979-05-27T00:32:00.999999-07:00
+	// 1979-05-27 07:32:00Z
+	// 1979-05-27 00:32:00-07:00
+	// 1979-05-27 00:32:00.999999-07:00
+	// 1979-05-27T07:32:00
+	// 1979-05-27T00:32:00.999999
+	// 1979-05-27 07:32:00
+	// 1979-05-27 00:32:00.999999
+	// 1979-05-27
+	// 07:32:00
+	// 00:32:00.999999
+	dateRegexp = regexp.MustCompile(`^(?:\d{1,4}-\d{2}-\d{2})?(?:[T ]?\d{2}:\d{2}:\d{2}(\.\d{1,9})?(Z|[+-]\d{2}:\d{2})?)?`)
+}
+
+// Entry point
+func lexToml(inputBytes []byte) []token {
+	runes := bytes.Runes(inputBytes)
+	l := &tomlLexer{
+		input:         runes,
+		tokens:        make([]token, 0, 256),
+		line:          1,
+		col:           1,
+		endbufferLine: 1,
+		endbufferCol:  1,
+	}
+	l.run()
+	return l.tokens
+}
--- a/vendor/github.com/pelletier/go-toml/localtime.go
+++ b/vendor/github.com/pelletier/go-toml/localtime.go
@ -0,0 +1,281 @@
+// Implementation of TOML's local date/time.
+// Copied over from https://github.com/googleapis/google-cloud-go/blob/master/civil/civil.go
+// to avoid pulling all the Google dependencies.
+//
+// Copyright 2016 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package civil implements types for civil time, a time-zone-independent
+// representation of time that follows the rules of the proleptic
+// Gregorian calendar with exactly 24-hour days, 60-minute hours, and 60-second
+// minutes.
+//
+// Because they lack location information, these types do not represent unique
+// moments or intervals of time. Use time.Time for that purpose.
+package toml
+
+import (
+	"fmt"
+	"time"
+)
+
+// A LocalDate represents a date (year, month, day).
+//
+// This type does not include location information, and therefore does not
+// describe a unique 24-hour timespan.
+type LocalDate struct {
+	Year  int        // Year (e.g., 2014).
+	Month time.Month // Month of the year (January = 1, ...).
+	Day   int        // Day of the month, starting at 1.
+}
+
+// LocalDateOf returns the LocalDate in which a time occurs in that time's location.
+func LocalDateOf(t time.Time) LocalDate {
+	var d LocalDate
+	d.Year, d.Month, d.Day = t.Date()
+	return d
+}
+
+// ParseLocalDate parses a string in RFC3339 full-date format and returns the date value it represents.
+func ParseLocalDate(s string) (LocalDate, error) {
+	t, err := time.Parse("2006-01-02", s)
+	if err != nil {
+		return LocalDate{}, err
+	}
+	return LocalDateOf(t), nil
+}
+
+// String returns the date in RFC3339 full-date format.
+func (d LocalDate) String() string {
+	return fmt.Sprintf("%04d-%02d-%02d", d.Year, d.Month, d.Day)
+}
+
+// IsValid reports whether the date is valid.
+func (d LocalDate) IsValid() bool {
+	return LocalDateOf(d.In(time.UTC)) == d
+}
+
+// In returns the time corresponding to time 00:00:00 of the date in the location.
+//
+// In is always consistent with time.LocalDate, even when time.LocalDate returns a time
+// on a different day. For example, if loc is America/Indiana/Vincennes, then both
+//     time.LocalDate(1955, time.May, 1, 0, 0, 0, 0, loc)
+// and
+//     civil.LocalDate{Year: 1955, Month: time.May, Day: 1}.In(loc)
+// return 23:00:00 on April 30, 1955.
+//
+// In panics if loc is nil.
+func (d LocalDate) In(loc *time.Location) time.Time {
+	return time.Date(d.Year, d.Month, d.Day, 0, 0, 0, 0, loc)
+}
+
+// AddDays returns the date that is n days in the future.
+// n can also be negative to go into the past.
+func (d LocalDate) AddDays(n int) LocalDate {
+	return LocalDateOf(d.In(time.UTC).AddDate(0, 0, n))
+}
+
+// DaysSince returns the signed number of days between the date and s, not including the end day.
+// This is the inverse operation to AddDays.
+func (d LocalDate) DaysSince(s LocalDate) (days int) {
+	// We convert to Unix time so we do not have to worry about leap seconds:
+	// Unix time increases by exactly 86400 seconds per day.
+	deltaUnix := d.In(time.UTC).Unix() - s.In(time.UTC).Unix()
+	return int(deltaUnix / 86400)
+}
+
+// Before reports whether d1 occurs before d2.
+func (d1 LocalDate) Before(d2 LocalDate) bool {
+	if d1.Year != d2.Year {
+		return d1.Year < d2.Year
+	}
+	if d1.Month != d2.Month {
+		return d1.Month < d2.Month
+	}
+	return d1.Day < d2.Day
+}
+
+// After reports whether d1 occurs after d2.
+func (d1 LocalDate) After(d2 LocalDate) bool {
+	return d2.Before(d1)
+}
+
+// MarshalText implements the encoding.TextMarshaler interface.
+// The output is the result of d.String().
+func (d LocalDate) MarshalText() ([]byte, error) {
+	return []byte(d.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+// The date is expected to be a string in a format accepted by ParseLocalDate.
+func (d *LocalDate) UnmarshalText(data []byte) error {
+	var err error
+	*d, err = ParseLocalDate(string(data))
+	return err
+}
+
+// A LocalTime represents a time with nanosecond precision.
+//
+// This type does not include location information, and therefore does not
+// describe a unique moment in time.
+//
+// This type exists to represent the TIME type in storage-based APIs like BigQuery.
+// Most operations on Times are unlikely to be meaningful. Prefer the LocalDateTime type.
+type LocalTime struct {
+	Hour       int // The hour of the day in 24-hour format; range [0-23]
+	Minute     int // The minute of the hour; range [0-59]
+	Second     int // The second of the minute; range [0-59]
+	Nanosecond int // The nanosecond of the second; range [0-999999999]
+}
+
+// LocalTimeOf returns the LocalTime representing the time of day in which a time occurs
+// in that time's location. It ignores the date.
+func LocalTimeOf(t time.Time) LocalTime {
+	var tm LocalTime
+	tm.Hour, tm.Minute, tm.Second = t.Clock()
+	tm.Nanosecond = t.Nanosecond()
+	return tm
+}
+
+// ParseLocalTime parses a string and returns the time value it represents.
+// ParseLocalTime accepts an extended form of the RFC3339 partial-time format. After
+// the HH:MM:SS part of the string, an optional fractional part may appear,
+// consisting of a decimal point followed by one to nine decimal digits.
+// (RFC3339 admits only one digit after the decimal point).
+func ParseLocalTime(s string) (LocalTime, error) {
+	t, err := time.Parse("15:04:05.999999999", s)
+	if err != nil {
+		return LocalTime{}, err
+	}
+	return LocalTimeOf(t), nil
+}
+
+// String returns the date in the format described in ParseLocalTime. If Nanoseconds
+// is zero, no fractional part will be generated. Otherwise, the result will
+// end with a fractional part consisting of a decimal point and nine digits.
+func (t LocalTime) String() string {
+	s := fmt.Sprintf("%02d:%02d:%02d", t.Hour, t.Minute, t.Second)
+	if t.Nanosecond == 0 {
+		return s
+	}
+	return s + fmt.Sprintf(".%09d", t.Nanosecond)
+}
+
+// IsValid reports whether the time is valid.
+func (t LocalTime) IsValid() bool {
+	// Construct a non-zero time.
+	tm := time.Date(2, 2, 2, t.Hour, t.Minute, t.Second, t.Nanosecond, time.UTC)
+	return LocalTimeOf(tm) == t
+}
+
+// MarshalText implements the encoding.TextMarshaler interface.
+// The output is the result of t.String().
+func (t LocalTime) MarshalText() ([]byte, error) {
+	return []byte(t.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+// The time is expected to be a string in a format accepted by ParseLocalTime.
+func (t *LocalTime) UnmarshalText(data []byte) error {
+	var err error
+	*t, err = ParseLocalTime(string(data))
+	return err
+}
+
+// A LocalDateTime represents a date and time.
+//
+// This type does not include location information, and therefore does not
+// describe a unique moment in time.
+type LocalDateTime struct {
+	Date LocalDate
+	Time LocalTime
+}
+
+// Note: We deliberately do not embed LocalDate into LocalDateTime, to avoid promoting AddDays and Sub.
+
+// LocalDateTimeOf returns the LocalDateTime in which a time occurs in that time's location.
+func LocalDateTimeOf(t time.Time) LocalDateTime {
+	return LocalDateTime{
+		Date: LocalDateOf(t),
+		Time: LocalTimeOf(t),
+	}
+}
+
+// ParseLocalDateTime parses a string and returns the LocalDateTime it represents.
+// ParseLocalDateTime accepts a variant of the RFC3339 date-time format that omits
+// the time offset but includes an optional fractional time, as described in
+// ParseLocalTime. Informally, the accepted format is
+//     YYYY-MM-DDTHH:MM:SS[.FFFFFFFFF]
+// where the 'T' may be a lower-case 't'.
+func ParseLocalDateTime(s string) (LocalDateTime, error) {
+	t, err := time.Parse("2006-01-02T15:04:05.999999999", s)
+	if err != nil {
+		t, err = time.Parse("2006-01-02t15:04:05.999999999", s)
+		if err != nil {
+			return LocalDateTime{}, err
+		}
+	}
+	return LocalDateTimeOf(t), nil
+}
+
+// String returns the date in the format described in ParseLocalDate.
+func (dt LocalDateTime) String() string {
+	return dt.Date.String() + "T" + dt.Time.String()
+}
+
+// IsValid reports whether the datetime is valid.
+func (dt LocalDateTime) IsValid() bool {
+	return dt.Date.IsValid() && dt.Time.IsValid()
+}
+
+// In returns the time corresponding to the LocalDateTime in the given location.
+//
+// If the time is missing or ambigous at the location, In returns the same
+// result as time.LocalDate. For example, if loc is America/Indiana/Vincennes, then
+// both
+//     time.LocalDate(1955, time.May, 1, 0, 30, 0, 0, loc)
+// and
+//     civil.LocalDateTime{
+//         civil.LocalDate{Year: 1955, Month: time.May, Day: 1}},
+//         civil.LocalTime{Minute: 30}}.In(loc)
+// return 23:30:00 on April 30, 1955.
+//
+// In panics if loc is nil.
+func (dt LocalDateTime) In(loc *time.Location) time.Time {
+	return time.Date(dt.Date.Year, dt.Date.Month, dt.Date.Day, dt.Time.Hour, dt.Time.Minute, dt.Time.Second, dt.Time.Nanosecond, loc)
+}
+
+// Before reports whether dt1 occurs before dt2.
+func (dt1 LocalDateTime) Before(dt2 LocalDateTime) bool {
+	return dt1.In(time.UTC).Before(dt2.In(time.UTC))
+}
+
+// After reports whether dt1 occurs after dt2.
+func (dt1 LocalDateTime) After(dt2 LocalDateTime) bool {
+	return dt2.Before(dt1)
+}
+
+// MarshalText implements the encoding.TextMarshaler interface.
+// The output is the result of dt.String().
+func (dt LocalDateTime) MarshalText() ([]byte, error) {
+	return []byte(dt.String()), nil
+}
+
+// UnmarshalText implements the encoding.TextUnmarshaler interface.
+// The datetime is expected to be a string in a format accepted by ParseLocalDateTime
+func (dt *LocalDateTime) UnmarshalText(data []byte) error {
+	var err error
+	*dt, err = ParseLocalDateTime(string(data))
+	return err
+}
--- a/vendor/github.com/pelletier/go-toml/marshal.go
+++ b/vendor/github.com/pelletier/go-toml/marshal.go
--- a/vendor/github.com/pelletier/go-toml/marshal_OrderPreserve_test.toml
+++ b/vendor/github.com/pelletier/go-toml/marshal_OrderPreserve_test.toml
@ -0,0 +1,39 @@
+title = "TOML Marshal Testing"
+
+[basic_lists]
+  floats = [12.3,45.6,78.9]
+  bools = [true,false,true]
+  dates = [1979-05-27T07:32:00Z,1980-05-27T07:32:00Z]
+  ints = [8001,8001,8002]
+  uints = [5002,5003]
+  strings = ["One","Two","Three"]
+
+[[subdocptrs]]
+  name = "Second"
+
+[basic_map]
+  one = "one"
+  two = "two"
+
+[subdoc]
+
+  [subdoc.second]
+    name = "Second"
+
+  [subdoc.first]
+    name = "First"
+
+[basic]
+  uint = 5001
+  bool = true
+  float = 123.4
+  float64 = 123.456782132399
+  int = 5000
+  string = "Bite me"
+  date = 1979-05-27T07:32:00Z
+
+[[subdoclist]]
+  name = "List.First"
+
+[[subdoclist]]
+  name = "List.Second"
--- a/vendor/github.com/pelletier/go-toml/marshal_test.toml
+++ b/vendor/github.com/pelletier/go-toml/marshal_test.toml
@ -0,0 +1,39 @@
+title = "TOML Marshal Testing"
+
+[basic]
+  bool = true
+  date = 1979-05-27T07:32:00Z
+  float = 123.4
+  float64 = 123.456782132399
+  int = 5000
+  string = "Bite me"
+  uint = 5001
+
+[basic_lists]
+  bools = [true,false,true]
+  dates = [1979-05-27T07:32:00Z,1980-05-27T07:32:00Z]
+  floats = [12.3,45.6,78.9]
+  ints = [8001,8001,8002]
+  strings = ["One","Two","Three"]
+  uints = [5002,5003]
+
+[basic_map]
+  one = "one"
+  two = "two"
+
+[subdoc]
+
+  [subdoc.first]
+    name = "First"
+
+  [subdoc.second]
+    name = "Second"
+
+[[subdoclist]]
+  name = "List.First"
+
+[[subdoclist]]
+  name = "List.Second"
+
+[[subdocptrs]]
+  name = "Second"
--- a/vendor/github.com/pelletier/go-toml/parser.go
+++ b/vendor/github.com/pelletier/go-toml/parser.go
@ -0,0 +1,493 @@
+// TOML Parser.
+
+package toml
+
+import (
+	"errors"
+	"fmt"
+	"math"
+	"reflect"
+	"regexp"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type tomlParser struct {
+	flowIdx       int
+	flow          []token
+	tree          *Tree
+	currentTable  []string
+	seenTableKeys []string
+}
+
+type tomlParserStateFn func() tomlParserStateFn
+
+// Formats and panics an error message based on a token
+func (p *tomlParser) raiseError(tok *token, msg string, args ...interface{}) {
+	panic(tok.Position.String() + ": " + fmt.Sprintf(msg, args...))
+}
+
+func (p *tomlParser) run() {
+	for state := p.parseStart; state != nil; {
+		state = state()
+	}
+}
+
+func (p *tomlParser) peek() *token {
+	if p.flowIdx >= len(p.flow) {
+		return nil
+	}
+	return &p.flow[p.flowIdx]
+}
+
+func (p *tomlParser) assume(typ tokenType) {
+	tok := p.getToken()
+	if tok == nil {
+		p.raiseError(tok, "was expecting token %s, but token stream is empty", tok)
+	}
+	if tok.typ != typ {
+		p.raiseError(tok, "was expecting token %s, but got %s instead", typ, tok)
+	}
+}
+
+func (p *tomlParser) getToken() *token {
+	tok := p.peek()
+	if tok == nil {
+		return nil
+	}
+	p.flowIdx++
+	return tok
+}
+
+func (p *tomlParser) parseStart() tomlParserStateFn {
+	tok := p.peek()
+
+	// end of stream, parsing is finished
+	if tok == nil {
+		return nil
+	}
+
+	switch tok.typ {
+	case tokenDoubleLeftBracket:
+		return p.parseGroupArray
+	case tokenLeftBracket:
+		return p.parseGroup
+	case tokenKey:
+		return p.parseAssign
+	case tokenEOF:
+		return nil
+	case tokenError:
+		p.raiseError(tok, "parsing error: %s", tok.String())
+	default:
+		p.raiseError(tok, "unexpected token %s", tok.typ)
+	}
+	return nil
+}
+
+func (p *tomlParser) parseGroupArray() tomlParserStateFn {
+	startToken := p.getToken() // discard the [[
+	key := p.getToken()
+	if key.typ != tokenKeyGroupArray {
+		p.raiseError(key, "unexpected token %s, was expecting a table array key", key)
+	}
+
+	// get or create table array element at the indicated part in the path
+	keys, err := parseKey(key.val)
+	if err != nil {
+		p.raiseError(key, "invalid table array key: %s", err)
+	}
+	p.tree.createSubTree(keys[:len(keys)-1], startToken.Position) // create parent entries
+	destTree := p.tree.GetPath(keys)
+	var array []*Tree
+	if destTree == nil {
+		array = make([]*Tree, 0)
+	} else if target, ok := destTree.([]*Tree); ok && target != nil {
+		array = destTree.([]*Tree)
+	} else {
+		p.raiseError(key, "key %s is already assigned and not of type table array", key)
+	}
+	p.currentTable = keys
+
+	// add a new tree to the end of the table array
+	newTree := newTree()
+	newTree.position = startToken.Position
+	array = append(array, newTree)
+	p.tree.SetPath(p.currentTable, array)
+
+	// remove all keys that were children of this table array
+	prefix := key.val + "."
+	found := false
+	for ii := 0; ii < len(p.seenTableKeys); {
+		tableKey := p.seenTableKeys[ii]
+		if strings.HasPrefix(tableKey, prefix) {
+			p.seenTableKeys = append(p.seenTableKeys[:ii], p.seenTableKeys[ii+1:]...)
+		} else {
+			found = (tableKey == key.val)
+			ii++
+		}
+	}
+
+	// keep this key name from use by other kinds of assignments
+	if !found {
+		p.seenTableKeys = append(p.seenTableKeys, key.val)
+	}
+
+	// move to next parser state
+	p.assume(tokenDoubleRightBracket)
+	return p.parseStart
+}
+
+func (p *tomlParser) parseGroup() tomlParserStateFn {
+	startToken := p.getToken() // discard the [
+	key := p.getToken()
+	if key.typ != tokenKeyGroup {
+		p.raiseError(key, "unexpected token %s, was expecting a table key", key)
+	}
+	for _, item := range p.seenTableKeys {
+		if item == key.val {
+			p.raiseError(key, "duplicated tables")
+		}
+	}
+
+	p.seenTableKeys = append(p.seenTableKeys, key.val)
+	keys, err := parseKey(key.val)
+	if err != nil {
+		p.raiseError(key, "invalid table array key: %s", err)
+	}
+	if err := p.tree.createSubTree(keys, startToken.Position); err != nil {
+		p.raiseError(key, "%s", err)
+	}
+	destTree := p.tree.GetPath(keys)
+	if target, ok := destTree.(*Tree); ok && target != nil && target.inline {
+		p.raiseError(key, "could not re-define exist inline table or its sub-table : %s",
+			strings.Join(keys, "."))
+	}
+	p.assume(tokenRightBracket)
+	p.currentTable = keys
+	return p.parseStart
+}
+
+func (p *tomlParser) parseAssign() tomlParserStateFn {
+	key := p.getToken()
+	p.assume(tokenEqual)
+
+	parsedKey, err := parseKey(key.val)
+	if err != nil {
+		p.raiseError(key, "invalid key: %s", err.Error())
+	}
+
+	value := p.parseRvalue()
+	var tableKey []string
+	if len(p.currentTable) > 0 {
+		tableKey = p.currentTable
+	} else {
+		tableKey = []string{}
+	}
+
+	prefixKey := parsedKey[0 : len(parsedKey)-1]
+	tableKey = append(tableKey, prefixKey...)
+
+	// find the table to assign, looking out for arrays of tables
+	var targetNode *Tree
+	switch node := p.tree.GetPath(tableKey).(type) {
+	case []*Tree:
+		targetNode = node[len(node)-1]
+	case *Tree:
+		targetNode = node
+	case nil:
+		// create intermediate
+		if err := p.tree.createSubTree(tableKey, key.Position); err != nil {
+			p.raiseError(key, "could not create intermediate group: %s", err)
+		}
+		targetNode = p.tree.GetPath(tableKey).(*Tree)
+	default:
+		p.raiseError(key, "Unknown table type for path: %s",
+			strings.Join(tableKey, "."))
+	}
+
+	if targetNode.inline {
+		p.raiseError(key, "could not add key or sub-table to exist inline table or its sub-table : %s",
+			strings.Join(tableKey, "."))
+	}
+
+	// assign value to the found table
+	keyVal := parsedKey[len(parsedKey)-1]
+	localKey := []string{keyVal}
+	finalKey := append(tableKey, keyVal)
+	if targetNode.GetPath(localKey) != nil {
+		p.raiseError(key, "The following key was defined twice: %s",
+			strings.Join(finalKey, "."))
+	}
+	var toInsert interface{}
+
+	switch value.(type) {
+	case *Tree, []*Tree:
+		toInsert = value
+	default:
+		toInsert = &tomlValue{value: value, position: key.Position}
+	}
+	targetNode.values[keyVal] = toInsert
+	return p.parseStart
+}
+
+var numberUnderscoreInvalidRegexp *regexp.Regexp
+var hexNumberUnderscoreInvalidRegexp *regexp.Regexp
+
+func numberContainsInvalidUnderscore(value string) error {
+	if numberUnderscoreInvalidRegexp.MatchString(value) {
+		return errors.New("invalid use of _ in number")
+	}
+	return nil
+}
+
+func hexNumberContainsInvalidUnderscore(value string) error {
+	if hexNumberUnderscoreInvalidRegexp.MatchString(value) {
+		return errors.New("invalid use of _ in hex number")
+	}
+	return nil
+}
+
+func cleanupNumberToken(value string) string {
+	cleanedVal := strings.Replace(value, "_", "", -1)
+	return cleanedVal
+}
+
+func (p *tomlParser) parseRvalue() interface{} {
+	tok := p.getToken()
+	if tok == nil || tok.typ == tokenEOF {
+		p.raiseError(tok, "expecting a value")
+	}
+
+	switch tok.typ {
+	case tokenString:
+		return tok.val
+	case tokenTrue:
+		return true
+	case tokenFalse:
+		return false
+	case tokenInf:
+		if tok.val[0] == '-' {
+			return math.Inf(-1)
+		}
+		return math.Inf(1)
+	case tokenNan:
+		return math.NaN()
+	case tokenInteger:
+		cleanedVal := cleanupNumberToken(tok.val)
+		var err error
+		var val int64
+		if len(cleanedVal) >= 3 && cleanedVal[0] == '0' {
+			switch cleanedVal[1] {
+			case 'x':
+				err = hexNumberContainsInvalidUnderscore(tok.val)
+				if err != nil {
+					p.raiseError(tok, "%s", err)
+				}
+				val, err = strconv.ParseInt(cleanedVal[2:], 16, 64)
+			case 'o':
+				err = numberContainsInvalidUnderscore(tok.val)
+				if err != nil {
+					p.raiseError(tok, "%s", err)
+				}
+				val, err = strconv.ParseInt(cleanedVal[2:], 8, 64)
+			case 'b':
+				err = numberContainsInvalidUnderscore(tok.val)
+				if err != nil {
+					p.raiseError(tok, "%s", err)
+				}
+				val, err = strconv.ParseInt(cleanedVal[2:], 2, 64)
+			default:
+				panic("invalid base") // the lexer should catch this first
+			}
+		} else {
+			err = numberContainsInvalidUnderscore(tok.val)
+			if err != nil {
+				p.raiseError(tok, "%s", err)
+			}
+			val, err = strconv.ParseInt(cleanedVal, 10, 64)
+		}
+		if err != nil {
+			p.raiseError(tok, "%s", err)
+		}
+		return val
+	case tokenFloat:
+		err := numberContainsInvalidUnderscore(tok.val)
+		if err != nil {
+			p.raiseError(tok, "%s", err)
+		}
+		cleanedVal := cleanupNumberToken(tok.val)
+		val, err := strconv.ParseFloat(cleanedVal, 64)
+		if err != nil {
+			p.raiseError(tok, "%s", err)
+		}
+		return val
+	case tokenDate:
+		layout := time.RFC3339Nano
+		if !strings.Contains(tok.val, "T") {
+			layout = strings.Replace(layout, "T", " ", 1)
+		}
+		val, err := time.ParseInLocation(layout, tok.val, time.UTC)
+		if err != nil {
+			p.raiseError(tok, "%s", err)
+		}
+		return val
+	case tokenLocalDate:
+		v := strings.Replace(tok.val, " ", "T", -1)
+		isDateTime := false
+		isTime := false
+		for _, c := range v {
+			if c == 'T' || c == 't' {
+				isDateTime = true
+				break
+			}
+			if c == ':' {
+				isTime = true
+				break
+			}
+		}
+
+		var val interface{}
+		var err error
+
+		if isDateTime {
+			val, err = ParseLocalDateTime(v)
+		} else if isTime {
+			val, err = ParseLocalTime(v)
+		} else {
+			val, err = ParseLocalDate(v)
+		}
+
+		if err != nil {
+			p.raiseError(tok, "%s", err)
+		}
+		return val
+	case tokenLeftBracket:
+		return p.parseArray()
+	case tokenLeftCurlyBrace:
+		return p.parseInlineTable()
+	case tokenEqual:
+		p.raiseError(tok, "cannot have multiple equals for the same key")
+	case tokenError:
+		p.raiseError(tok, "%s", tok)
+	}
+
+	p.raiseError(tok, "never reached")
+
+	return nil
+}
+
+func tokenIsComma(t *token) bool {
+	return t != nil && t.typ == tokenComma
+}
+
+func (p *tomlParser) parseInlineTable() *Tree {
+	tree := newTree()
+	var previous *token
+Loop:
+	for {
+		follow := p.peek()
+		if follow == nil || follow.typ == tokenEOF {
+			p.raiseError(follow, "unterminated inline table")
+		}
+		switch follow.typ {
+		case tokenRightCurlyBrace:
+			p.getToken()
+			break Loop
+		case tokenKey, tokenInteger, tokenString:
+			if !tokenIsComma(previous) && previous != nil {
+				p.raiseError(follow, "comma expected between fields in inline table")
+			}
+			key := p.getToken()
+			p.assume(tokenEqual)
+
+			parsedKey, err := parseKey(key.val)
+			if err != nil {
+				p.raiseError(key, "invalid key: %s", err)
+			}
+
+			value := p.parseRvalue()
+			tree.SetPath(parsedKey, value)
+		case tokenComma:
+			if tokenIsComma(previous) {
+				p.raiseError(follow, "need field between two commas in inline table")
+			}
+			p.getToken()
+		default:
+			p.raiseError(follow, "unexpected token type in inline table: %s", follow.String())
+		}
+		previous = follow
+	}
+	if tokenIsComma(previous) {
+		p.raiseError(previous, "trailing comma at the end of inline table")
+	}
+	tree.inline = true
+	return tree
+}
+
+func (p *tomlParser) parseArray() interface{} {
+	var array []interface{}
+	arrayType := reflect.TypeOf(newTree())
+	for {
+		follow := p.peek()
+		if follow == nil || follow.typ == tokenEOF {
+			p.raiseError(follow, "unterminated array")
+		}
+		if follow.typ == tokenRightBracket {
+			p.getToken()
+			break
+		}
+		val := p.parseRvalue()
+		if reflect.TypeOf(val) != arrayType {
+			arrayType = nil
+		}
+		array = append(array, val)
+		follow = p.peek()
+		if follow == nil || follow.typ == tokenEOF {
+			p.raiseError(follow, "unterminated array")
+		}
+		if follow.typ != tokenRightBracket && follow.typ != tokenComma {
+			p.raiseError(follow, "missing comma")
+		}
+		if follow.typ == tokenComma {
+			p.getToken()
+		}
+	}
+
+	// if the array is a mixed-type array or its length is 0,
+	// don't convert it to a table array
+	if len(array) <= 0 {
+		arrayType = nil
+	}
+	// An array of Trees is actually an array of inline
+	// tables, which is a shorthand for a table array. If the
+	// array was not converted from []interface{} to []*Tree,
+	// the two notations would not be equivalent.
+	if arrayType == reflect.TypeOf(newTree()) {
+		tomlArray := make([]*Tree, len(array))
+		for i, v := range array {
+			tomlArray[i] = v.(*Tree)
+		}
+		return tomlArray
+	}
+	return array
+}
+
+func parseToml(flow []token) *Tree {
+	result := newTree()
+	result.position = Position{1, 1}
+	parser := &tomlParser{
+		flowIdx:       0,
+		flow:          flow,
+		tree:          result,
+		currentTable:  make([]string, 0),
+		seenTableKeys: make([]string, 0),
+	}
+	parser.run()
+	return result
+}
+
+func init() {
+	numberUnderscoreInvalidRegexp = regexp.MustCompile(`([^\d]_|_[^\d])|_$|^_`)
+	hexNumberUnderscoreInvalidRegexp = regexp.MustCompile(`(^0x_)|([^\da-f]_|_[^\da-f])|_$|^_`)
+}
--- a/vendor/github.com/pelletier/go-toml/position.go
+++ b/vendor/github.com/pelletier/go-toml/position.go
@ -0,0 +1,29 @@
+// Position support for go-toml
+
+package toml
+
+import (
+	"fmt"
+)
+
+// Position of a document element within a TOML document.
+//
+// Line and Col are both 1-indexed positions for the element's line number and
+// column number, respectively.  Values of zero or less will cause Invalid(),
+// to return true.
+type Position struct {
+	Line int // line within the document
+	Col  int // column within the line
+}
+
+// String representation of the position.
+// Displays 1-indexed line and column numbers.
+func (p Position) String() string {
+	return fmt.Sprintf("(%d, %d)", p.Line, p.Col)
+}
+
+// Invalid returns whether or not the position is valid (i.e. with negative or
+// null values)
+func (p Position) Invalid() bool {
+	return p.Line <= 0 || p.Col <= 0
+}
--- a/vendor/github.com/pelletier/go-toml/token.go
+++ b/vendor/github.com/pelletier/go-toml/token.go
@ -0,0 +1,134 @@
+package toml
+
+import "fmt"
+
+// Define tokens
+type tokenType int
+
+const (
+	eof = -(iota + 1)
+)
+
+const (
+	tokenError tokenType = iota
+	tokenEOF
+	tokenComment
+	tokenKey
+	tokenString
+	tokenInteger
+	tokenTrue
+	tokenFalse
+	tokenFloat
+	tokenInf
+	tokenNan
+	tokenEqual
+	tokenLeftBracket
+	tokenRightBracket
+	tokenLeftCurlyBrace
+	tokenRightCurlyBrace
+	tokenLeftParen
+	tokenRightParen
+	tokenDoubleLeftBracket
+	tokenDoubleRightBracket
+	tokenDate
+	tokenLocalDate
+	tokenKeyGroup
+	tokenKeyGroupArray
+	tokenComma
+	tokenColon
+	tokenDollar
+	tokenStar
+	tokenQuestion
+	tokenDot
+	tokenDotDot
+	tokenEOL
+)
+
+var tokenTypeNames = []string{
+	"Error",
+	"EOF",
+	"Comment",
+	"Key",
+	"String",
+	"Integer",
+	"True",
+	"False",
+	"Float",
+	"Inf",
+	"NaN",
+	"=",
+	"[",
+	"]",
+	"{",
+	"}",
+	"(",
+	")",
+	"]]",
+	"[[",
+	"LocalDate",
+	"LocalDate",
+	"KeyGroup",
+	"KeyGroupArray",
+	",",
+	":",
+	"$",
+	"*",
+	"?",
+	".",
+	"..",
+	"EOL",
+}
+
+type token struct {
+	Position
+	typ tokenType
+	val string
+}
+
+func (tt tokenType) String() string {
+	idx := int(tt)
+	if idx < len(tokenTypeNames) {
+		return tokenTypeNames[idx]
+	}
+	return "Unknown"
+}
+
+func (t token) String() string {
+	switch t.typ {
+	case tokenEOF:
+		return "EOF"
+	case tokenError:
+		return t.val
+	}
+
+	return fmt.Sprintf("%q", t.val)
+}
+
+func isSpace(r rune) bool {
+	return r == ' ' || r == '\t'
+}
+
+func isAlphanumeric(r rune) bool {
+	return 'a' <= r && r <= 'z' || 'A' <= r && r <= 'Z' || r == '_'
+}
+
+func isKeyChar(r rune) bool {
+	// Keys start with the first character that isn't whitespace or [ and end
+	// with the last non-whitespace character before the equals sign. Keys
+	// cannot contain a # character."
+	return !(r == '\r' || r == '\n' || r == eof || r == '=')
+}
+
+func isKeyStartChar(r rune) bool {
+	return !(isSpace(r) || r == '\r' || r == '\n' || r == eof || r == '[')
+}
+
+func isDigit(r rune) bool {
+	return '0' <= r && r <= '9'
+}
+
+func isHexDigit(r rune) bool {
+	return isDigit(r) ||
+		(r >= 'a' && r <= 'f') ||
+		(r >= 'A' && r <= 'F')
+}
--- a/vendor/github.com/pelletier/go-toml/toml.go
+++ b/vendor/github.com/pelletier/go-toml/toml.go
@ -0,0 +1,529 @@
+package toml
+
+import (
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"runtime"
+	"strings"
+)
+
+type tomlValue struct {
+	value     interface{} // string, int64, uint64, float64, bool, time.Time, [] of any of this list
+	comment   string
+	commented bool
+	multiline bool
+	position  Position
+}
+
+// Tree is the result of the parsing of a TOML file.
+type Tree struct {
+	values    map[string]interface{} // string -> *tomlValue, *Tree, []*Tree
+	comment   string
+	commented bool
+	inline    bool
+	position  Position
+}
+
+func newTree() *Tree {
+	return newTreeWithPosition(Position{})
+}
+
+func newTreeWithPosition(pos Position) *Tree {
+	return &Tree{
+		values:   make(map[string]interface{}),
+		position: pos,
+	}
+}
+
+// TreeFromMap initializes a new Tree object using the given map.
+func TreeFromMap(m map[string]interface{}) (*Tree, error) {
+	result, err := toTree(m)
+	if err != nil {
+		return nil, err
+	}
+	return result.(*Tree), nil
+}
+
+// Position returns the position of the tree.
+func (t *Tree) Position() Position {
+	return t.position
+}
+
+// Has returns a boolean indicating if the given key exists.
+func (t *Tree) Has(key string) bool {
+	if key == "" {
+		return false
+	}
+	return t.HasPath(strings.Split(key, "."))
+}
+
+// HasPath returns true if the given path of keys exists, false otherwise.
+func (t *Tree) HasPath(keys []string) bool {
+	return t.GetPath(keys) != nil
+}
+
+// Keys returns the keys of the toplevel tree (does not recurse).
+func (t *Tree) Keys() []string {
+	keys := make([]string, len(t.values))
+	i := 0
+	for k := range t.values {
+		keys[i] = k
+		i++
+	}
+	return keys
+}
+
+// Get the value at key in the Tree.
+// Key is a dot-separated path (e.g. a.b.c) without single/double quoted strings.
+// If you need to retrieve non-bare keys, use GetPath.
+// Returns nil if the path does not exist in the tree.
+// If keys is of length zero, the current tree is returned.
+func (t *Tree) Get(key string) interface{} {
+	if key == "" {
+		return t
+	}
+	return t.GetPath(strings.Split(key, "."))
+}
+
+// GetPath returns the element in the tree indicated by 'keys'.
+// If keys is of length zero, the current tree is returned.
+func (t *Tree) GetPath(keys []string) interface{} {
+	if len(keys) == 0 {
+		return t
+	}
+	subtree := t
+	for _, intermediateKey := range keys[:len(keys)-1] {
+		value, exists := subtree.values[intermediateKey]
+		if !exists {
+			return nil
+		}
+		switch node := value.(type) {
+		case *Tree:
+			subtree = node
+		case []*Tree:
+			// go to most recent element
+			if len(node) == 0 {
+				return nil
+			}
+			subtree = node[len(node)-1]
+		default:
+			return nil // cannot navigate through other node types
+		}
+	}
+	// branch based on final node type
+	switch node := subtree.values[keys[len(keys)-1]].(type) {
+	case *tomlValue:
+		return node.value
+	default:
+		return node
+	}
+}
+
+// GetArray returns the value at key in the Tree.
+// It returns []string, []int64, etc type if key has homogeneous lists
+// Key is a dot-separated path (e.g. a.b.c) without single/double quoted strings.
+// Returns nil if the path does not exist in the tree.
+// If keys is of length zero, the current tree is returned.
+func (t *Tree) GetArray(key string) interface{} {
+	if key == "" {
+		return t
+	}
+	return t.GetArrayPath(strings.Split(key, "."))
+}
+
+// GetArrayPath returns the element in the tree indicated by 'keys'.
+// If keys is of length zero, the current tree is returned.
+func (t *Tree) GetArrayPath(keys []string) interface{} {
+	if len(keys) == 0 {
+		return t
+	}
+	subtree := t
+	for _, intermediateKey := range keys[:len(keys)-1] {
+		value, exists := subtree.values[intermediateKey]
+		if !exists {
+			return nil
+		}
+		switch node := value.(type) {
+		case *Tree:
+			subtree = node
+		case []*Tree:
+			// go to most recent element
+			if len(node) == 0 {
+				return nil
+			}
+			subtree = node[len(node)-1]
+		default:
+			return nil // cannot navigate through other node types
+		}
+	}
+	// branch based on final node type
+	switch node := subtree.values[keys[len(keys)-1]].(type) {
+	case *tomlValue:
+		switch n := node.value.(type) {
+		case []interface{}:
+			return getArray(n)
+		default:
+			return node.value
+		}
+	default:
+		return node
+	}
+}
+
+// if homogeneous array, then return slice type object over []interface{}
+func getArray(n []interface{}) interface{} {
+	var s []string
+	var i64 []int64
+	var f64 []float64
+	var bl []bool
+	for _, value := range n {
+		switch v := value.(type) {
+		case string:
+			s = append(s, v)
+		case int64:
+			i64 = append(i64, v)
+		case float64:
+			f64 = append(f64, v)
+		case bool:
+			bl = append(bl, v)
+		default:
+			return n
+		}
+	}
+	if len(s) == len(n) {
+		return s
+	} else if len(i64) == len(n) {
+		return i64
+	} else if len(f64) == len(n) {
+		return f64
+	} else if len(bl) == len(n) {
+		return bl
+	}
+	return n
+}
+
+// GetPosition returns the position of the given key.
+func (t *Tree) GetPosition(key string) Position {
+	if key == "" {
+		return t.position
+	}
+	return t.GetPositionPath(strings.Split(key, "."))
+}
+
+// SetPositionPath sets the position of element in the tree indicated by 'keys'.
+// If keys is of length zero, the current tree position is set.
+func (t *Tree) SetPositionPath(keys []string, pos Position) {
+	if len(keys) == 0 {
+		t.position = pos
+		return
+	}
+	subtree := t
+	for _, intermediateKey := range keys[:len(keys)-1] {
+		value, exists := subtree.values[intermediateKey]
+		if !exists {
+			return
+		}
+		switch node := value.(type) {
+		case *Tree:
+			subtree = node
+		case []*Tree:
+			// go to most recent element
+			if len(node) == 0 {
+				return
+			}
+			subtree = node[len(node)-1]
+		default:
+			return
+		}
+	}
+	// branch based on final node type
+	switch node := subtree.values[keys[len(keys)-1]].(type) {
+	case *tomlValue:
+		node.position = pos
+		return
+	case *Tree:
+		node.position = pos
+		return
+	case []*Tree:
+		// go to most recent element
+		if len(node) == 0 {
+			return
+		}
+		node[len(node)-1].position = pos
+		return
+	}
+}
+
+// GetPositionPath returns the element in the tree indicated by 'keys'.
+// If keys is of length zero, the current tree is returned.
+func (t *Tree) GetPositionPath(keys []string) Position {
+	if len(keys) == 0 {
+		return t.position
+	}
+	subtree := t
+	for _, intermediateKey := range keys[:len(keys)-1] {
+		value, exists := subtree.values[intermediateKey]
+		if !exists {
+			return Position{0, 0}
+		}
+		switch node := value.(type) {
+		case *Tree:
+			subtree = node
+		case []*Tree:
+			// go to most recent element
+			if len(node) == 0 {
+				return Position{0, 0}
+			}
+			subtree = node[len(node)-1]
+		default:
+			return Position{0, 0}
+		}
+	}
+	// branch based on final node type
+	switch node := subtree.values[keys[len(keys)-1]].(type) {
+	case *tomlValue:
+		return node.position
+	case *Tree:
+		return node.position
+	case []*Tree:
+		// go to most recent element
+		if len(node) == 0 {
+			return Position{0, 0}
+		}
+		return node[len(node)-1].position
+	default:
+		return Position{0, 0}
+	}
+}
+
+// GetDefault works like Get but with a default value
+func (t *Tree) GetDefault(key string, def interface{}) interface{} {
+	val := t.Get(key)
+	if val == nil {
+		return def
+	}
+	return val
+}
+
+// SetOptions arguments are supplied to the SetWithOptions and SetPathWithOptions functions to modify marshalling behaviour.
+// The default values within the struct are valid default options.
+type SetOptions struct {
+	Comment   string
+	Commented bool
+	Multiline bool
+}
+
+// SetWithOptions is the same as Set, but allows you to provide formatting
+// instructions to the key, that will be used by Marshal().
+func (t *Tree) SetWithOptions(key string, opts SetOptions, value interface{}) {
+	t.SetPathWithOptions(strings.Split(key, "."), opts, value)
+}
+
+// SetPathWithOptions is the same as SetPath, but allows you to provide
+// formatting instructions to the key, that will be reused by Marshal().
+func (t *Tree) SetPathWithOptions(keys []string, opts SetOptions, value interface{}) {
+	subtree := t
+	for i, intermediateKey := range keys[:len(keys)-1] {
+		nextTree, exists := subtree.values[intermediateKey]
+		if !exists {
+			nextTree = newTreeWithPosition(Position{Line: t.position.Line + i, Col: t.position.Col})
+			subtree.values[intermediateKey] = nextTree // add new element here
+		}
+		switch node := nextTree.(type) {
+		case *Tree:
+			subtree = node
+		case []*Tree:
+			// go to most recent element
+			if len(node) == 0 {
+				// create element if it does not exist
+				node = append(node, newTreeWithPosition(Position{Line: t.position.Line + i, Col: t.position.Col}))
+				subtree.values[intermediateKey] = node
+			}
+			subtree = node[len(node)-1]
+		}
+	}
+
+	var toInsert interface{}
+
+	switch v := value.(type) {
+	case *Tree:
+		v.comment = opts.Comment
+		v.commented = opts.Commented
+		toInsert = value
+	case []*Tree:
+		for i := range v {
+			v[i].commented = opts.Commented
+		}
+		toInsert = value
+	case *tomlValue:
+		v.comment = opts.Comment
+		v.commented = opts.Commented
+		v.multiline = opts.Multiline
+		toInsert = v
+	default:
+		toInsert = &tomlValue{value: value,
+			comment:   opts.Comment,
+			commented: opts.Commented,
+			multiline: opts.Multiline,
+			position:  Position{Line: subtree.position.Line + len(subtree.values) + 1, Col: subtree.position.Col}}
+	}
+
+	subtree.values[keys[len(keys)-1]] = toInsert
+}
+
+// Set an element in the tree.
+// Key is a dot-separated path (e.g. a.b.c).
+// Creates all necessary intermediate trees, if needed.
+func (t *Tree) Set(key string, value interface{}) {
+	t.SetWithComment(key, "", false, value)
+}
+
+// SetWithComment is the same as Set, but allows you to provide comment
+// information to the key, that will be reused by Marshal().
+func (t *Tree) SetWithComment(key string, comment string, commented bool, value interface{}) {
+	t.SetPathWithComment(strings.Split(key, "."), comment, commented, value)
+}
+
+// SetPath sets an element in the tree.
+// Keys is an array of path elements (e.g. {"a","b","c"}).
+// Creates all necessary intermediate trees, if needed.
+func (t *Tree) SetPath(keys []string, value interface{}) {
+	t.SetPathWithComment(keys, "", false, value)
+}
+
+// SetPathWithComment is the same as SetPath, but allows you to provide comment
+// information to the key, that will be reused by Marshal().
+func (t *Tree) SetPathWithComment(keys []string, comment string, commented bool, value interface{}) {
+	t.SetPathWithOptions(keys, SetOptions{Comment: comment, Commented: commented}, value)
+}
+
+// Delete removes a key from the tree.
+// Key is a dot-separated path (e.g. a.b.c).
+func (t *Tree) Delete(key string) error {
+	keys, err := parseKey(key)
+	if err != nil {
+		return err
+	}
+	return t.DeletePath(keys)
+}
+
+// DeletePath removes a key from the tree.
+// Keys is an array of path elements (e.g. {"a","b","c"}).
+func (t *Tree) DeletePath(keys []string) error {
+	keyLen := len(keys)
+	if keyLen == 1 {
+		delete(t.values, keys[0])
+		return nil
+	}
+	tree := t.GetPath(keys[:keyLen-1])
+	item := keys[keyLen-1]
+	switch node := tree.(type) {
+	case *Tree:
+		delete(node.values, item)
+		return nil
+	}
+	return errors.New("no such key to delete")
+}
+
+// createSubTree takes a tree and a key and create the necessary intermediate
+// subtrees to create a subtree at that point. In-place.
+//
+// e.g. passing a.b.c will create (assuming tree is empty) tree[a], tree[a][b]
+// and tree[a][b][c]
+//
+// Returns nil on success, error object on failure
+func (t *Tree) createSubTree(keys []string, pos Position) error {
+	subtree := t
+	for i, intermediateKey := range keys {
+		nextTree, exists := subtree.values[intermediateKey]
+		if !exists {
+			tree := newTreeWithPosition(Position{Line: t.position.Line + i, Col: t.position.Col})
+			tree.position = pos
+			tree.inline = subtree.inline
+			subtree.values[intermediateKey] = tree
+			nextTree = tree
+		}
+
+		switch node := nextTree.(type) {
+		case []*Tree:
+			subtree = node[len(node)-1]
+		case *Tree:
+			subtree = node
+		default:
+			return fmt.Errorf("unknown type for path %s (%s): %T (%#v)",
+				strings.Join(keys, "."), intermediateKey, nextTree, nextTree)
+		}
+	}
+	return nil
+}
+
+// LoadBytes creates a Tree from a []byte.
+func LoadBytes(b []byte) (tree *Tree, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			if _, ok := r.(runtime.Error); ok {
+				panic(r)
+			}
+			err = errors.New(r.(string))
+		}
+	}()
+
+	if len(b) >= 4 && (hasUTF32BigEndianBOM4(b) || hasUTF32LittleEndianBOM4(b)) {
+		b = b[4:]
+	} else if len(b) >= 3 && hasUTF8BOM3(b) {
+		b = b[3:]
+	} else if len(b) >= 2 && (hasUTF16BigEndianBOM2(b) || hasUTF16LittleEndianBOM2(b)) {
+		b = b[2:]
+	}
+
+	tree = parseToml(lexToml(b))
+	return
+}
+
+func hasUTF16BigEndianBOM2(b []byte) bool {
+	return b[0] == 0xFE && b[1] == 0xFF
+}
+
+func hasUTF16LittleEndianBOM2(b []byte) bool {
+	return b[0] == 0xFF && b[1] == 0xFE
+}
+
+func hasUTF8BOM3(b []byte) bool {
+	return b[0] == 0xEF && b[1] == 0xBB && b[2] == 0xBF
+}
+
+func hasUTF32BigEndianBOM4(b []byte) bool {
+	return b[0] == 0x00 && b[1] == 0x00 && b[2] == 0xFE && b[3] == 0xFF
+}
+
+func hasUTF32LittleEndianBOM4(b []byte) bool {
+	return b[0] == 0xFF && b[1] == 0xFE && b[2] == 0x00 && b[3] == 0x00
+}
+
+// LoadReader creates a Tree from any io.Reader.
+func LoadReader(reader io.Reader) (tree *Tree, err error) {
+	inputBytes, err := ioutil.ReadAll(reader)
+	if err != nil {
+		return
+	}
+	tree, err = LoadBytes(inputBytes)
+	return
+}
+
+// Load creates a Tree from a string.
+func Load(content string) (tree *Tree, err error) {
+	return LoadBytes([]byte(content))
+}
+
+// LoadFile creates a Tree from a file.
+func LoadFile(path string) (tree *Tree, err error) {
+	file, err := os.Open(path)
+	if err != nil {
+		return nil, err
+	}
+	defer file.Close()
+	return LoadReader(file)
+}
--- a/vendor/github.com/pelletier/go-toml/tomltree_create.go
+++ b/vendor/github.com/pelletier/go-toml/tomltree_create.go
@ -0,0 +1,155 @@
+package toml
+
+import (
+	"fmt"
+	"reflect"
+	"time"
+)
+
+var kindToType = [reflect.String + 1]reflect.Type{
+	reflect.Bool:    reflect.TypeOf(true),
+	reflect.String:  reflect.TypeOf(""),
+	reflect.Float32: reflect.TypeOf(float64(1)),
+	reflect.Float64: reflect.TypeOf(float64(1)),
+	reflect.Int:     reflect.TypeOf(int64(1)),
+	reflect.Int8:    reflect.TypeOf(int64(1)),
+	reflect.Int16:   reflect.TypeOf(int64(1)),
+	reflect.Int32:   reflect.TypeOf(int64(1)),
+	reflect.Int64:   reflect.TypeOf(int64(1)),
+	reflect.Uint:    reflect.TypeOf(uint64(1)),
+	reflect.Uint8:   reflect.TypeOf(uint64(1)),
+	reflect.Uint16:  reflect.TypeOf(uint64(1)),
+	reflect.Uint32:  reflect.TypeOf(uint64(1)),
+	reflect.Uint64:  reflect.TypeOf(uint64(1)),
+}
+
+// typeFor returns a reflect.Type for a reflect.Kind, or nil if none is found.
+// supported values:
+// string, bool, int64, uint64, float64, time.Time, int, int8, int16, int32, uint, uint8, uint16, uint32, float32
+func typeFor(k reflect.Kind) reflect.Type {
+	if k > 0 && int(k) < len(kindToType) {
+		return kindToType[k]
+	}
+	return nil
+}
+
+func simpleValueCoercion(object interface{}) (interface{}, error) {
+	switch original := object.(type) {
+	case string, bool, int64, uint64, float64, time.Time:
+		return original, nil
+	case int:
+		return int64(original), nil
+	case int8:
+		return int64(original), nil
+	case int16:
+		return int64(original), nil
+	case int32:
+		return int64(original), nil
+	case uint:
+		return uint64(original), nil
+	case uint8:
+		return uint64(original), nil
+	case uint16:
+		return uint64(original), nil
+	case uint32:
+		return uint64(original), nil
+	case float32:
+		return float64(original), nil
+	case fmt.Stringer:
+		return original.String(), nil
+	case []interface{}:
+		value := reflect.ValueOf(original)
+		length := value.Len()
+		arrayValue := reflect.MakeSlice(value.Type(), 0, length)
+		for i := 0; i < length; i++ {
+			val := value.Index(i).Interface()
+			simpleValue, err := simpleValueCoercion(val)
+			if err != nil {
+				return nil, err
+			}
+			arrayValue = reflect.Append(arrayValue, reflect.ValueOf(simpleValue))
+		}
+		return arrayValue.Interface(), nil
+	default:
+		return nil, fmt.Errorf("cannot convert type %T to Tree", object)
+	}
+}
+
+func sliceToTree(object interface{}) (interface{}, error) {
+	// arrays are a bit tricky, since they can represent either a
+	// collection of simple values, which is represented by one
+	// *tomlValue, or an array of tables, which is represented by an
+	// array of *Tree.
+
+	// holding the assumption that this function is called from toTree only when value.Kind() is Array or Slice
+	value := reflect.ValueOf(object)
+	insideType := value.Type().Elem()
+	length := value.Len()
+	if length > 0 {
+		insideType = reflect.ValueOf(value.Index(0).Interface()).Type()
+	}
+	if insideType.Kind() == reflect.Map {
+		// this is considered as an array of tables
+		tablesArray := make([]*Tree, 0, length)
+		for i := 0; i < length; i++ {
+			table := value.Index(i)
+			tree, err := toTree(table.Interface())
+			if err != nil {
+				return nil, err
+			}
+			tablesArray = append(tablesArray, tree.(*Tree))
+		}
+		return tablesArray, nil
+	}
+
+	sliceType := typeFor(insideType.Kind())
+	if sliceType == nil {
+		sliceType = insideType
+	}
+
+	arrayValue := reflect.MakeSlice(reflect.SliceOf(sliceType), 0, length)
+
+	for i := 0; i < length; i++ {
+		val := value.Index(i).Interface()
+		simpleValue, err := simpleValueCoercion(val)
+		if err != nil {
+			return nil, err
+		}
+		arrayValue = reflect.Append(arrayValue, reflect.ValueOf(simpleValue))
+	}
+	return &tomlValue{value: arrayValue.Interface(), position: Position{}}, nil
+}
+
+func toTree(object interface{}) (interface{}, error) {
+	value := reflect.ValueOf(object)
+
+	if value.Kind() == reflect.Map {
+		values := map[string]interface{}{}
+		keys := value.MapKeys()
+		for _, key := range keys {
+			if key.Kind() != reflect.String {
+				if _, ok := key.Interface().(string); !ok {
+					return nil, fmt.Errorf("map key needs to be a string, not %T (%v)", key.Interface(), key.Kind())
+				}
+			}
+
+			v := value.MapIndex(key)
+			newValue, err := toTree(v.Interface())
+			if err != nil {
+				return nil, err
+			}
+			values[key.String()] = newValue
+		}
+		return &Tree{values: values, position: Position{}}, nil
+	}
+
+	if value.Kind() == reflect.Array || value.Kind() == reflect.Slice {
+		return sliceToTree(object)
+	}
+
+	simpleValue, err := simpleValueCoercion(object)
+	if err != nil {
+		return nil, err
+	}
+	return &tomlValue{value: simpleValue, position: Position{}}, nil
+}
--- a/vendor/github.com/pelletier/go-toml/tomltree_write.go
+++ b/vendor/github.com/pelletier/go-toml/tomltree_write.go
@ -0,0 +1,517 @@
+package toml
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"math"
+	"math/big"
+	"reflect"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type valueComplexity int
+
+const (
+	valueSimple valueComplexity = iota + 1
+	valueComplex
+)
+
+type sortNode struct {
+	key        string
+	complexity valueComplexity
+}
+
+// Encodes a string to a TOML-compliant multi-line string value
+// This function is a clone of the existing encodeTomlString function, except that whitespace characters
+// are preserved. Quotation marks and backslashes are also not escaped.
+func encodeMultilineTomlString(value string, commented string) string {
+	var b bytes.Buffer
+	adjacentQuoteCount := 0
+
+	b.WriteString(commented)
+	for i, rr := range value {
+		if rr != '"' {
+			adjacentQuoteCount = 0
+		} else {
+			adjacentQuoteCount++
+		}
+		switch rr {
+		case '\b':
+			b.WriteString(`\b`)
+		case '\t':
+			b.WriteString("\t")
+		case '\n':
+			b.WriteString("\n" + commented)
+		case '\f':
+			b.WriteString(`\f`)
+		case '\r':
+			b.WriteString("\r")
+		case '"':
+			if adjacentQuoteCount >= 3 || i == len(value)-1 {
+				adjacentQuoteCount = 0
+				b.WriteString(`\"`)
+			} else {
+				b.WriteString(`"`)
+			}
+		case '\\':
+			b.WriteString(`\`)
+		default:
+			intRr := uint16(rr)
+			if intRr < 0x001F {
+				b.WriteString(fmt.Sprintf("\\u%0.4X", intRr))
+			} else {
+				b.WriteRune(rr)
+			}
+		}
+	}
+	return b.String()
+}
+
+// Encodes a string to a TOML-compliant string value
+func encodeTomlString(value string) string {
+	var b bytes.Buffer
+
+	for _, rr := range value {
+		switch rr {
+		case '\b':
+			b.WriteString(`\b`)
+		case '\t':
+			b.WriteString(`\t`)
+		case '\n':
+			b.WriteString(`\n`)
+		case '\f':
+			b.WriteString(`\f`)
+		case '\r':
+			b.WriteString(`\r`)
+		case '"':
+			b.WriteString(`\"`)
+		case '\\':
+			b.WriteString(`\\`)
+		default:
+			intRr := uint16(rr)
+			if intRr < 0x001F {
+				b.WriteString(fmt.Sprintf("\\u%0.4X", intRr))
+			} else {
+				b.WriteRune(rr)
+			}
+		}
+	}
+	return b.String()
+}
+
+func tomlTreeStringRepresentation(t *Tree, ord marshalOrder) (string, error) {
+	var orderedVals []sortNode
+	switch ord {
+	case OrderPreserve:
+		orderedVals = sortByLines(t)
+	default:
+		orderedVals = sortAlphabetical(t)
+	}
+
+	var values []string
+	for _, node := range orderedVals {
+		k := node.key
+		v := t.values[k]
+
+		repr, err := tomlValueStringRepresentation(v, "", "", ord, false)
+		if err != nil {
+			return "", err
+		}
+		values = append(values, quoteKeyIfNeeded(k)+" = "+repr)
+	}
+	return "{ " + strings.Join(values, ", ") + " }", nil
+}
+
+func tomlValueStringRepresentation(v interface{}, commented string, indent string, ord marshalOrder, arraysOneElementPerLine bool) (string, error) {
+	// this interface check is added to dereference the change made in the writeTo function.
+	// That change was made to allow this function to see formatting options.
+	tv, ok := v.(*tomlValue)
+	if ok {
+		v = tv.value
+	} else {
+		tv = &tomlValue{}
+	}
+
+	switch value := v.(type) {
+	case uint64:
+		return strconv.FormatUint(value, 10), nil
+	case int64:
+		return strconv.FormatInt(value, 10), nil
+	case float64:
+		// Default bit length is full 64
+		bits := 64
+		// Float panics if nan is used
+		if !math.IsNaN(value) {
+			// if 32 bit accuracy is enough to exactly show, use 32
+			_, acc := big.NewFloat(value).Float32()
+			if acc == big.Exact {
+				bits = 32
+			}
+		}
+		if math.Trunc(value) == value {
+			return strings.ToLower(strconv.FormatFloat(value, 'f', 1, bits)), nil
+		}
+		return strings.ToLower(strconv.FormatFloat(value, 'f', -1, bits)), nil
+	case string:
+		if tv.multiline {
+			return "\"\"\"\n" + encodeMultilineTomlString(value, commented) + "\"\"\"", nil
+		}
+		return "\"" + encodeTomlString(value) + "\"", nil
+	case []byte:
+		b, _ := v.([]byte)
+		return string(b), nil
+	case bool:
+		if value {
+			return "true", nil
+		}
+		return "false", nil
+	case time.Time:
+		return value.Format(time.RFC3339), nil
+	case LocalDate:
+		return value.String(), nil
+	case LocalDateTime:
+		return value.String(), nil
+	case LocalTime:
+		return value.String(), nil
+	case *Tree:
+		return tomlTreeStringRepresentation(value, ord)
+	case nil:
+		return "", nil
+	}
+
+	rv := reflect.ValueOf(v)
+
+	if rv.Kind() == reflect.Slice {
+		var values []string
+		for i := 0; i < rv.Len(); i++ {
+			item := rv.Index(i).Interface()
+			itemRepr, err := tomlValueStringRepresentation(item, commented, indent, ord, arraysOneElementPerLine)
+			if err != nil {
+				return "", err
+			}
+			values = append(values, itemRepr)
+		}
+		if arraysOneElementPerLine && len(values) > 1 {
+			stringBuffer := bytes.Buffer{}
+			valueIndent := indent + `  ` // TODO: move that to a shared encoder state
+
+			stringBuffer.WriteString("[\n")
+
+			for _, value := range values {
+				stringBuffer.WriteString(valueIndent)
+				stringBuffer.WriteString(commented + value)
+				stringBuffer.WriteString(`,`)
+				stringBuffer.WriteString("\n")
+			}
+
+			stringBuffer.WriteString(indent + commented + "]")
+
+			return stringBuffer.String(), nil
+		}
+		return "[" + strings.Join(values, ", ") + "]", nil
+	}
+	return "", fmt.Errorf("unsupported value type %T: %v", v, v)
+}
+
+func getTreeArrayLine(trees []*Tree) (line int) {
+	// get lowest line number that is not 0
+	for _, tv := range trees {
+		if tv.position.Line < line || line == 0 {
+			line = tv.position.Line
+		}
+	}
+	return
+}
+
+func sortByLines(t *Tree) (vals []sortNode) {
+	var (
+		line  int
+		lines []int
+		tv    *Tree
+		tom   *tomlValue
+		node  sortNode
+	)
+	vals = make([]sortNode, 0)
+	m := make(map[int]sortNode)
+
+	for k := range t.values {
+		v := t.values[k]
+		switch v.(type) {
+		case *Tree:
+			tv = v.(*Tree)
+			line = tv.position.Line
+			node = sortNode{key: k, complexity: valueComplex}
+		case []*Tree:
+			line = getTreeArrayLine(v.([]*Tree))
+			node = sortNode{key: k, complexity: valueComplex}
+		default:
+			tom = v.(*tomlValue)
+			line = tom.position.Line
+			node = sortNode{key: k, complexity: valueSimple}
+		}
+		lines = append(lines, line)
+		vals = append(vals, node)
+		m[line] = node
+	}
+	sort.Ints(lines)
+
+	for i, line := range lines {
+		vals[i] = m[line]
+	}
+
+	return vals
+}
+
+func sortAlphabetical(t *Tree) (vals []sortNode) {
+	var (
+		node     sortNode
+		simpVals []string
+		compVals []string
+	)
+	vals = make([]sortNode, 0)
+	m := make(map[string]sortNode)
+
+	for k := range t.values {
+		v := t.values[k]
+		switch v.(type) {
+		case *Tree, []*Tree:
+			node = sortNode{key: k, complexity: valueComplex}
+			compVals = append(compVals, node.key)
+		default:
+			node = sortNode{key: k, complexity: valueSimple}
+			simpVals = append(simpVals, node.key)
+		}
+		vals = append(vals, node)
+		m[node.key] = node
+	}
+
+	// Simples first to match previous implementation
+	sort.Strings(simpVals)
+	i := 0
+	for _, key := range simpVals {
+		vals[i] = m[key]
+		i++
+	}
+
+	sort.Strings(compVals)
+	for _, key := range compVals {
+		vals[i] = m[key]
+		i++
+	}
+
+	return vals
+}
+
+func (t *Tree) writeTo(w io.Writer, indent, keyspace string, bytesCount int64, arraysOneElementPerLine bool) (int64, error) {
+	return t.writeToOrdered(w, indent, keyspace, bytesCount, arraysOneElementPerLine, OrderAlphabetical, "  ", false)
+}
+
+func (t *Tree) writeToOrdered(w io.Writer, indent, keyspace string, bytesCount int64, arraysOneElementPerLine bool, ord marshalOrder, indentString string, parentCommented bool) (int64, error) {
+	var orderedVals []sortNode
+
+	switch ord {
+	case OrderPreserve:
+		orderedVals = sortByLines(t)
+	default:
+		orderedVals = sortAlphabetical(t)
+	}
+
+	for _, node := range orderedVals {
+		switch node.complexity {
+		case valueComplex:
+			k := node.key
+			v := t.values[k]
+
+			combinedKey := quoteKeyIfNeeded(k)
+			if keyspace != "" {
+				combinedKey = keyspace + "." + combinedKey
+			}
+
+			switch node := v.(type) {
+			// node has to be of those two types given how keys are sorted above
+			case *Tree:
+				tv, ok := t.values[k].(*Tree)
+				if !ok {
+					return bytesCount, fmt.Errorf("invalid value type at %s: %T", k, t.values[k])
+				}
+				if tv.comment != "" {
+					comment := strings.Replace(tv.comment, "\n", "\n"+indent+"#", -1)
+					start := "# "
+					if strings.HasPrefix(comment, "#") {
+						start = ""
+					}
+					writtenBytesCountComment, errc := writeStrings(w, "\n", indent, start, comment)
+					bytesCount += int64(writtenBytesCountComment)
+					if errc != nil {
+						return bytesCount, errc
+					}
+				}
+
+				var commented string
+				if parentCommented || t.commented || tv.commented {
+					commented = "# "
+				}
+				writtenBytesCount, err := writeStrings(w, "\n", indent, commented, "[", combinedKey, "]\n")
+				bytesCount += int64(writtenBytesCount)
+				if err != nil {
+					return bytesCount, err
+				}
+				bytesCount, err = node.writeToOrdered(w, indent+indentString, combinedKey, bytesCount, arraysOneElementPerLine, ord, indentString, parentCommented || t.commented || tv.commented)
+				if err != nil {
+					return bytesCount, err
+				}
+			case []*Tree:
+				for _, subTree := range node {
+					var commented string
+					if parentCommented || t.commented || subTree.commented {
+						commented = "# "
+					}
+					writtenBytesCount, err := writeStrings(w, "\n", indent, commented, "[[", combinedKey, "]]\n")
+					bytesCount += int64(writtenBytesCount)
+					if err != nil {
+						return bytesCount, err
+					}
+
+					bytesCount, err = subTree.writeToOrdered(w, indent+indentString, combinedKey, bytesCount, arraysOneElementPerLine, ord, indentString, parentCommented || t.commented || subTree.commented)
+					if err != nil {
+						return bytesCount, err
+					}
+				}
+			}
+		default: // Simple
+			k := node.key
+			v, ok := t.values[k].(*tomlValue)
+			if !ok {
+				return bytesCount, fmt.Errorf("invalid value type at %s: %T", k, t.values[k])
+			}
+
+			var commented string
+			if parentCommented || t.commented || v.commented {
+				commented = "# "
+			}
+			repr, err := tomlValueStringRepresentation(v, commented, indent, ord, arraysOneElementPerLine)
+			if err != nil {
+				return bytesCount, err
+			}
+
+			if v.comment != "" {
+				comment := strings.Replace(v.comment, "\n", "\n"+indent+"#", -1)
+				start := "# "
+				if strings.HasPrefix(comment, "#") {
+					start = ""
+				}
+				writtenBytesCountComment, errc := writeStrings(w, "\n", indent, start, comment, "\n")
+				bytesCount += int64(writtenBytesCountComment)
+				if errc != nil {
+					return bytesCount, errc
+				}
+			}
+
+			quotedKey := quoteKeyIfNeeded(k)
+			writtenBytesCount, err := writeStrings(w, indent, commented, quotedKey, " = ", repr, "\n")
+			bytesCount += int64(writtenBytesCount)
+			if err != nil {
+				return bytesCount, err
+			}
+		}
+	}
+
+	return bytesCount, nil
+}
+
+// quote a key if it does not fit the bare key format (A-Za-z0-9_-)
+// quoted keys use the same rules as strings
+func quoteKeyIfNeeded(k string) string {
+	// when encoding a map with the 'quoteMapKeys' option enabled, the tree will contain
+	// keys that have already been quoted.
+	// not an ideal situation, but good enough of a stop gap.
+	if len(k) >= 2 && k[0] == '"' && k[len(k)-1] == '"' {
+		return k
+	}
+	isBare := true
+	for _, r := range k {
+		if !isValidBareChar(r) {
+			isBare = false
+			break
+		}
+	}
+	if isBare {
+		return k
+	}
+	return quoteKey(k)
+}
+
+func quoteKey(k string) string {
+	return "\"" + encodeTomlString(k) + "\""
+}
+
+func writeStrings(w io.Writer, s ...string) (int, error) {
+	var n int
+	for i := range s {
+		b, err := io.WriteString(w, s[i])
+		n += b
+		if err != nil {
+			return n, err
+		}
+	}
+	return n, nil
+}
+
+// WriteTo encode the Tree as Toml and writes it to the writer w.
+// Returns the number of bytes written in case of success, or an error if anything happened.
+func (t *Tree) WriteTo(w io.Writer) (int64, error) {
+	return t.writeTo(w, "", "", 0, false)
+}
+
+// ToTomlString generates a human-readable representation of the current tree.
+// Output spans multiple lines, and is suitable for ingest by a TOML parser.
+// If the conversion cannot be performed, ToString returns a non-nil error.
+func (t *Tree) ToTomlString() (string, error) {
+	b, err := t.Marshal()
+	if err != nil {
+		return "", err
+	}
+	return string(b), nil
+}
+
+// String generates a human-readable representation of the current tree.
+// Alias of ToString. Present to implement the fmt.Stringer interface.
+func (t *Tree) String() string {
+	result, _ := t.ToTomlString()
+	return result
+}
+
+// ToMap recursively generates a representation of the tree using Go built-in structures.
+// The following types are used:
+//
+//	* bool
+//	* float64
+//	* int64
+//	* string
+//	* uint64
+//	* time.Time
+//	* map[string]interface{} (where interface{} is any of this list)
+//	* []interface{} (where interface{} is any of this list)
+func (t *Tree) ToMap() map[string]interface{} {
+	result := map[string]interface{}{}
+
+	for k, v := range t.values {
+		switch node := v.(type) {
+		case []*Tree:
+			var array []interface{}
+			for _, item := range node {
+				array = append(array, item.ToMap())
+			}
+			result[k] = array
+		case *Tree:
+			result[k] = node.ToMap()
+		case *tomlValue:
+			result[k] = node.value
+		}
+	}
+	return result
+}
--- a/vendor/github.com/warthog618/gpiod/.gitignore
+++ b/vendor/github.com/warthog618/gpiod/.gitignore
@ -0,0 +1 @@
+*.test
--- a/vendor/github.com/warthog618/gpiod/.travis.yml
+++ b/vendor/github.com/warthog618/gpiod/.travis.yml
@ -0,0 +1,21 @@
+language: go
+
+go:
+  - "1.x"
+  - "1.13"
+  - tip
+
+os:
+  - linux
+
+matrix:
+  allow_failures:
+    - go: tip
+  fast_finish: true
+
+install:
+  - go get -v ./...
+
+script:
+  - go vet ./...
+  - make
--- a/vendor/github.com/warthog618/gpiod/LICENSE
+++ b/vendor/github.com/warthog618/gpiod/LICENSE
@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Kent Gibson
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+
+The above copyright notice and this permission notice (including the next
+paragraph) shall be included in all copies or substantial portions of the
+Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
--- a/vendor/github.com/warthog618/gpiod/Makefile
+++ b/vendor/github.com/warthog618/gpiod/Makefile
@ -0,0 +1,28 @@
+GOCMD=go
+GOBUILD=$(GOCMD) build
+GOCLEAN=$(GOCMD) clean
+
+VERSION ?= $(shell git describe --tags --always --dirty 2> /dev/null )
+LDFLAGS=-ldflags "-X=main.version=$(VERSION)"
+
+spis=$(patsubst %.go, %, $(wildcard example/spi/*/*.go))
+examples=$(patsubst %.go, %, $(wildcard example/*/*.go))
+bins= $(spis) $(examples)
+
+cmds=$(patsubst %.go, %, $(wildcard cmd/gpio*/gpio*.go))
+
+all: tools $(bins)
+
+$(cmds) : % : %.go
+	cd $(@D); \
+	$(GOBUILD) $(LDFLAGS)
+
+$(bins) : % : %.go
+	cd $(@D); \
+	$(GOBUILD)
+
+clean: 
+	$(GOCLEAN) ./...
+
+tools: $(cmds)
+
--- a/vendor/github.com/warthog618/gpiod/README.md
+++ b/vendor/github.com/warthog618/gpiod/README.md
@ -0,0 +1,439 @@
+# gpiod
+
+[![Build Status](https://travis-ci.org/warthog618/gpiod.svg)](https://travis-ci.org/warthog618/gpiod)
+[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://pkg.go.dev/github.com/warthog618/gpiod)
+[![Go Report Card](https://goreportcard.com/badge/github.com/warthog618/gpiod)](https://goreportcard.com/report/github.com/warthog618/gpiod)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/warthog618/gpiod/blob/master/LICENSE)
+
+A native Go library for Linux GPIO.
+
+**gpiod** is a library for accessing GPIO pins/lines on Linux platforms using
+the GPIO character device.
+
+The goal of this library is to provide the Go equivalent of the C
+**[libgpiod](https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git/)**
+library. The intent is not to mirror the **libgpiod** API but to provide the
+equivalent functionality.
+
+## Features
+
+Supports the following functionality per line and for collections of lines:
+
+- direction (input/output)<sup>1</sup>
+- write (active/inactive)
+- read (active/inactive)
+- active high/low (defaults to high)
+- output mode (normal/open-drain/open-source)
+- pull up/down<sup>2</sup>
+- watches and edge detection (rising/falling/both)
+- chip and line labels
+
+<sup>1</sup>Dynamically changing line direction without releasing the line
+requires Linux v5.5 or later.
+
+<sup>2</sup>Pull up/down support requires Linux v5.5 or later.
+
+All library functions are safe to call from different goroutines.
+
+## Usage
+
+```go
+import "github.com/warthog618/gpiod"
+```
+
+Error handling is omitted from the following examples for brevity.
+
+### Chip Initialization
+
+The Chip object is used to request lines from a GPIO chip.
+
+A Chip object is constructed using the
+[*NewChip*](https://pkg.go.dev/github.com/warthog618/gpiod#NewChip) function.
+
+```go
+c, _ := gpiod.NewChip("gpiochip0")
+```
+
+The parameter is the chip name, which corresponds to the name of the device in
+the **/dev** directory, so in this example **/dev/gpiochip0**.
+
+Default attributes for Lines requested from the Chip can be set via
+[options](#line-options) to
+[*NewChip*](https://pkg.go.dev/github.com/warthog618/gpiod#NewChip).
+
+```go
+c, _ := gpiod.NewChip("gpiochip0", gpiod.WithConsumer("myapp"))
+```
+
+In this example the consumer label is defaulted to "myapp".
+
+When no longer required, the chip should be closed to release resources:
+
+```go
+c.Close()
+```
+
+Closing a chip does not close or otherwise alter the state of any lines
+requested from the chip.
+
+### Line Requests
+
+To alter the state of a
+[line](https://pkg.go.dev/github.com/warthog618/gpiod#Line) it must first be
+requested from the Chip, using
+[*Chip.RequestLine*](https://pkg.go.dev/github.com/warthog618/gpiod#Chip.RequestLine):
+
+```go
+l, _ := c.RequestLine(4)                    // in its existing state
+```
+
+The offset parameter identifies the line on the chip, and is specific to the
+GPIO chip.  To improve readability, convenience mappings can be provided for
+specific devices, such as the Raspberry Pi:
+
+```go
+l, _ := c.RequestLine(rpi.J8p7)             // using Raspberry Pi J8 mapping
+```
+
+The initial state of the line can be set by providing [line
+options](#line-options), as shown in this *AsOutput* example:
+
+```go
+l, _ := c.RequestLine(4,gpiod.AsOutput(1))  // as an output line
+```
+
+Multiple lines from the same chip may be requested as a collection of
+[lines](https://pkg.go.dev/github.com/warthog618/gpiod#Lines) using
+[*Chip.RequestLines*](https://pkg.go.dev/github.com/warthog618/gpiod#Chip.RequestLines):
+
+```go
+ll, _ := c.RequestLines([]int{0, 1, 2, 3}, gpiod.AsOutput(0, 0, 1, 1))
+```
+
+Note that [line options](#line-options) applied to a collection of lines apply
+to all lines in the collection.
+
+When no longer required, the line(s) should be closed to release resources:
+
+```go
+l.Close()
+ll.Close()
+```
+
+### Line Info
+
+[Info](https://pkg.go.dev/github.com/warthog618/gpiod#LineInfo) about a line can
+be read at any time from the chip using the
+[*LineInfo*](https://pkg.go.dev/github.com/warthog618/gpiod#Chip.LineInfo)
+method:
+
+```go
+inf, _ := c.LineInfo(4)
+inf, _ := c.LineInfo(rpi.J8p7) // Using Raspberry Pi J8 mapping
+```
+
+Note that the line info does not include the value.  The line must be requested
+from the chip to access the value.  Once requested, the line info can also be
+read from the line:
+
+```go
+inf, _ := l.Info()
+infs, _ := ll.Info()
+```
+
+### Direction
+
+The line direction can be controlled using the *AsInput* and *AsOutput* [line
+options](#line-options):
+
+```go
+l, _ := c.RequestLine(4,gpiod.AsInput) // during request
+l.Reconfigure(gpiod.AsInput)           // set direction to Input
+l.Reconfigure(gpiod.AsOutput(0))       // set direction to Output (and value to inactive)
+```
+
+### Read Input
+
+The current line level can be read with the
+[*Value*](https://pkg.go.dev/github.com/warthog618/gpiod#Line.Value)
+method:
+
+```go
+r, _ := l.Value()  // Read state from line (active / inactive)
+```
+
+For collections of lines, the level of all lines is read simultaneously using
+the [*Values*](https://pkg.go.dev/github.com/warthog618/gpiod#Lines.SetValues)
+method:
+
+```go
+rr := []int{0, 0, 0, 0} // buffer to read into...
+ll.Values(rr)           // Read the state of a collection of lines
+```
+
+### Write Output
+
+The current line level can be set with the
+[*SetValue*](https://pkg.go.dev/github.com/warthog618/gpiod#Line.SetValue)
+method:
+
+```go
+l.SetValue(1)     // Set line active
+l.SetValue(0)     // Set line inactive
+```
+
+Also refer to the [blinker](example/blinker/blinker.go) example.
+
+For collections of lines, all lines are set simultaneously using the
+[*SetValues*](https://pkg.go.dev/github.com/warthog618/gpiod#Lines.SetValues)
+method:
+
+```go
+ll.SetValues([]int{0, 1, 0, 1}) // Set a collection of lines
+```
+
+### Watches
+
+The state of an input line can be watched and trigger calls to handler
+functions.
+
+The watch can be on rising or falling edges, or both.
+
+The handler function is passed a
+[*LineEvent*](https://pkg.go.dev/github.com/warthog618/gpiod#LineEvent), which
+contains the offset of the triggering line, the time the edge was detected and
+the type of edge detected:
+
+```go
+func handler(evt gpiod.LineEvent) {
+  // handle change in line state
+}
+
+l, _ := c.RequestLine(rpi.J8p7, gpiod.WithBothEdges(handler)))
+```
+
+A watch can be removed by closing the line:
+
+```go
+l.Close()
+```
+
+Also see the [watcher](example/watcher/watcher.go) example.
+
+### Find
+
+Lines can be found by the GPIO label name as returned in line info and set by
+device-tree using the
+[*FindLine*](https://pkg.go.dev/github.com/warthog618/gpiod#FindLine) function:
+
+```go
+chipname, offset, _ := gpiod.FindLine("LED A")
+c, _ := gpiod.NewChip(chipname, gpiod.WithConsumer("myapp"))
+l, _ := c.RequestLine(offset)
+```
+
+### Active Level
+
+The values used throughout the API for line values are the logical value, which
+is 0 for inactive and 1 for active. The physical level considered active can be
+controlled using the *AsActiveHigh* and *AsActiveLow* [line
+options](#line-options):
+
+```go
+l, _ := c.RequestLine(4,gpiod.AsActiveLow) // during request
+l.Reconfigure(gpiod.AsActiveHigh)          // once requested
+```
+
+Lines are typically active high by default.
+
+### Bias
+
+The bias [line options](#line-options) control the pull up/down state of the
+line:
+
+```go
+l,_ := c.RequestLine(4,gpiod.WithPullUp)  // during request
+l.Reconfigure(gpiod.WithBiasDisable)      // once requested
+```
+
+Note that bias options require Linux v5.5 or later.
+
+### Drive
+
+The drive options control how an output line is driven when active and inactive:
+
+```go
+l,_ := c.RequestLine(4,gpiod.AsOpenDrain) // during request
+l.Reconfigure(gpiod.AsOpenSource)         // once requested
+```
+
+The default drive for output lines is push-pull, which drives the line in both
+directions.
+
+### Line Options
+
+Line attributes are set via options to *Chip.RequestLine(s)* and
+*Line.Reconfigure*.  These override any default which may be set in *NewChip*.
+Only one option from each category may be applied.  If multiple options from a
+category are applied then all but the last are ignored.
+
+The line options are:
+
+Option | Category | Description
+---|---|---
+*WithConsumer*<sup>1</sup>|Info|Set the consumer label for the lines
+*AsActiveLow*|Level|Treat a low physical line level as active
+*AsActiveHigh*|Level|Treat a high physical line level as active (default)
+*AsInput*|Direction|Request lines as input
+*AsIs*<sup>2</sup>|Direction|Request lines in their current input/output state (default)
+*AsOutput(\<values\>...)*<sup>3</sup>|Direction|Request lines as output with initial values
+*AsPushPull*|Drive<sup>3</sup>|Request output lines drive both high and low (default)
+*AsOpenDrain*|Drive<sup>3</sup>|Request lines as open drain outputs
+*AsOpenSource*|Drive<sup>3</sup>|Request lines as open source outputs
+*WithFallingEdge(eh)*|Edge<sup>4</sup>|Request lines with falling edge detection, with events passed to the provided event handler
+*WithRisingEdge(eh)*|Edge<sup>4</sup>|Request lines with rising edge detection, with events passed to the provided event handler
+*WithBothEdges(eh)*|Edge<sup>4</sup>|Request lines with rising and falling edge detection, with events passed to the provided event handler
+*WithBiasDisable*|Bias<sup>5</sup>|Request the lines have internal bias disabled
+*WithPullDown*|Bias<sup>5</sup>|Request the lines have internal pull-down enabled
+*WithPullUp*|Bias<sup>5</sup>|Request the lines have internal pull-up enabled
+
+<sup>1</sup> WithConsumer can be provided to either *NewChip* or
+*Chip.RequestLine(s)*, and cannot be used with *Line.Reconfigure*.
+
+<sup>2</sup> The AsIs option can only be provided to *Chip.RequestLine(s)*, and
+cannot be used with *NewChip* or *Line.Reconfigure*.
+
+<sup>3</sup> The AsOutput and Drive options can only be provided to either
+*Chip.RequestLine(s)* or *Line.Reconfigure*, and cannot be used with *NewChip*.
+
+<sup>4</sup> Edge options can only be provided to *Chip.RequestLine(s)*, and
+cannot be used with *NewChip* or *Line.Reconfigure*.
+
+<sup>5</sup> Bias options require Linux v5.5 or later.
+
+## Tools
+
+A command line utility, **gpiodctl**, can be found in the cmd directory and is
+provided to allow manual or scripted manipulation of GPIO lines.  This utility
+combines the Go equivalent of all the **libgpiod** command line tools into a
+single tool.
+
+```sh
+gpiodctl is a utility to control GPIO lines on Linux GPIO character devices
+
+Usage:
+  gpiodctl [flags]
+  gpiodctl [command]
+
+Available Commands:
+  detect      Detect available GPIO chips
+  find        Find a GPIO line by name
+  get         Get the state of a line
+  help        Help about any command
+  info        Info about chip lines
+  mon         Monitor the state of a line
+  set         Set the state of a line
+  version     Display the version
+
+Flags:
+  -h, --help   help for gpiodctl
+
+Use "gpiodctl [command] --help" for more information about a command.
+
+```
+
+The Go equivalent of each of the **libgpiod** command line tools can also be
+found in the cmd directory.
+
+Those tools are:
+
+Tool | Description
+--- | ---
+gpiodetect | Report all the gpiochips available on the system.
+gpioinfo | Report the details of all the lines available on gpiochips.
+gpiofind | Find the gpiochip and offset of a line by name.
+gpioget | Get the value of a line or a set of lines on one gpiochip.
+gpioset | Set of value of a line or a set of lines on one gpiochip.
+gpiomon | Report edges detected on a line or set of lines on one gpiochip.
+
+## Tests
+
+The library is fully tested, other than some error cases and sanity checks that
+are difficult to trigger.
+
+The tests require a kernel release 5.1.0 or later to run.  For all the tests to
+pass a kernel 5.5.0 or later is required.
+
+The test user must have access to the **/dev/gpiochip0** character device.
+
+### Platforms
+
+The tests can be run on either of two platforms:
+
+- gpio-mockup (default)
+- Raspberry Pi
+
+#### gpio-mockup
+
+The gpio-mockup platform is any Linux platform with a recent kernel that supports
+the **gpio-mockup** loadable module. **gpio-mockup** must be built as a module
+and the test user must have rights to load and unload the module.
+
+The **gpio-mockup** is the default platform for tests and benchmarks as it does not interact with physical hardware and so is always safe to run.
+
+#### Raspberry Pi
+
+On Raspberry Pi, the tests are intended to be run on a board with J8 pins 11 and
+12 floating and with pins 15 and 16 tied together, possibly using a jumper
+across the header.  The tests set J8 pins 11, 12 and 16 to outputs so **DO NOT**
+run them on hardware where any of those pins is being externally driven.
+
+The Raspberry Pi platform is selected by specifying the platform parameter on the test command line:
+
+```sh
+go test -platform=rpi
+```
+
+Tests have been run successfully on Raspberry Pi Zero W and Pi 4B.  The library
+should also work on other Raspberry Pi variants, I just haven't gotten around to
+testing them yet.
+
+The tests can be cross-compiled from other platforms using:
+
+```sh
+GOOS=linux GOARCH=arm GOARM=6 go test -c
+```
+
+Later Pis can also use ARM7 (GOARM=7).
+
+### Benchmarks
+
+The tests include benchmarks on reads, writes, bulk reads and writes,  and
+interrupt latency.
+
+These are the results from a Raspberry Pi Zero W built with Go 1.13:
+
+```sh
+$ ./gpiod.test -platform=rpi -test.bench=.*
+goos: linux
+goarch: arm
+pkg: gpiod
+BenchmarkLineValue             157851          7160 ns/op
+BenchmarkLinesValues           152865          7599 ns/op
+BenchmarkLineSetValue          171585          6782 ns/op
+BenchmarkLinesSetValues        155041          7995 ns/op
+BenchmarkInterruptLatency        2041        581938 ns/op
+PASS
+```
+
+## Prerequisites
+
+The library targets Linux with support for the GPIO character device API.  That
+generally means that **/dev/gpiochip0** exists.
+
+The Bias line options and the Line.Reconfigure method both require Linux v5.5 or
+later.
+
+The caller must have access to the character device - typically
+**/dev/gpiochip0**.  That is generally root unless you have changed the
+permissions of that device.
--- a/vendor/github.com/warthog618/gpiod/go.mod
+++ b/vendor/github.com/warthog618/gpiod/go.mod
@ -0,0 +1,13 @@
+module github.com/warthog618/gpiod
+
+go 1.12
+
+require (
+	github.com/pilebones/go-udev v0.0.0-20180820235104-043677e09b13
+	github.com/spf13/cobra v0.0.5
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/stretchr/testify v1.4.0
+	github.com/warthog618/config v0.4.1
+	golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+)
--- a/vendor/github.com/warthog618/gpiod/go.sum
+++ b/vendor/github.com/warthog618/gpiod/go.sum
@ -0,0 +1,220 @@
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--- a/vendor/github.com/warthog618/gpiod/gpiod.go
+++ b/vendor/github.com/warthog618/gpiod/gpiod.go
@ -0,0 +1,830 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+// Package gpiod is a library for accessing GPIO pins/lines on Linux platforms
+// using the GPIO character device.
+//
+// This is a Go equivalent of libgpiod.
+//
+// Supports:
+// - Line direction (input/output)
+// - Line write (active/inactive)
+// - Line read (active/inactive)
+// - Line bias (pull-up/pull-down/disabled)
+// - Line drive (push-pull/open-drain/open-source)
+// - Line level (active-high/active-low)
+// - Line edge detection (rising/falling/both)
+// - Line labels
+// - Collections of lines for near simultaneous reads and writes on multiple lines
+//
+// Example of use:
+//
+//  c, err := gpiod.NewChip("gpiochip0")
+//  if err != nil {
+//  	panic(err)
+//  }
+//  v := 0
+//  l, err := c.RequestLine(4, gpiod.AsOutput(v))
+//  if err != nil {
+//  	panic(err)
+//  }
+//  for {
+//  	<-time.After(time.Second)
+//  	v ^= 1
+//  	l.SetValue(v)
+//  }
+//
+package gpiod
+
+import (
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/warthog618/gpiod/uapi"
+	"golang.org/x/sys/unix"
+)
+
+// Chip represents a single GPIO chip that controls a set of lines.
+type Chip struct {
+	f *os.File
+	// The system name for this chip.
+	Name string
+
+	// A more individual label for the chip.
+	Label string
+
+	// The number of GPIO lines on this chip.
+	lines int
+
+	// default options for reserved lines.
+	options ChipOptions
+
+	// mutex covers the attributes below it.
+	mu sync.Mutex
+
+	// watcher for line info changes
+	iw *infoWatcher
+
+	// handlers for info changes in watched lines, keyed by offset.
+	ich map[int]InfoChangeHandler
+
+	// indicates the chip has been closed.
+	closed bool
+}
+
+// LineInfo contains a summary of publicly available information about the
+// line.
+type LineInfo struct {
+	// The line offset within the chip.
+	Offset int
+
+	// The system name for the line.
+	Name string
+
+	// A string identifying the requester of the line, if requested.
+	Consumer string
+
+	// True if the line is requested.
+	Requested bool
+
+	// True if the line was requested as an output.
+	IsOut bool
+
+	// True if the line was requested as active low.
+	ActiveLow bool
+
+	// True if the line was requested as open drain.
+	//
+	// Only valid for outputs.
+	OpenDrain bool
+
+	// True if the line was requested as open source.
+	//
+	// Only valid for outputs.
+	OpenSource bool
+
+	// True if the line was requested with bias disabled.
+	BiasDisable bool
+
+	// True if the line was requested with pull-down.
+	PullDown bool
+
+	// True if the line was requested with pull-up.
+	PullUp bool
+}
+
+// Chips returns the names of the available GPIO devices.
+func Chips() []string {
+	cc := []string(nil)
+	for _, name := range chipNames() {
+		if IsChip(name) == nil {
+			cc = append(cc, name)
+		}
+	}
+	return cc
+}
+
+// FindLine finds the chip and offset of the named line.
+//
+// Returns an error if the line cannot be found.
+func FindLine(lname string) (string, int, error) {
+	c, o, err := findLine(lname)
+	if err != nil {
+		return "", 0, err
+	}
+	c.Close()
+	return c.Name, o, nil
+}
+
+// NewChip opens a GPIO character device.
+func NewChip(name string, options ...ChipOption) (*Chip, error) {
+	path := nameToPath(name)
+	err := IsChip(path)
+	if err != nil {
+		return nil, err
+	}
+	co := ChipOptions{
+		consumer: fmt.Sprintf("gpiod-%d", os.Getpid()),
+	}
+	for _, option := range options {
+		option.applyChipOption(&co)
+	}
+	f, err := os.OpenFile(path, unix.O_CLOEXEC, unix.O_RDONLY)
+	if err != nil {
+		// only happens if device removed/locked since IsChip call.
+		return nil, err
+	}
+	ci, err := uapi.GetChipInfo(f.Fd())
+	if err != nil {
+		// only occurs if IsChip was wrong?
+		f.Close()
+		return nil, err
+	}
+	c := Chip{
+		f:       f,
+		Name:    uapi.BytesToString(ci.Name[:]),
+		Label:   uapi.BytesToString(ci.Label[:]),
+		lines:   int(ci.Lines),
+		options: co,
+	}
+	if len(c.Label) == 0 {
+		c.Label = "unknown"
+	}
+	return &c, nil
+}
+
+// Close releases the Chip.
+//
+// It does not release any lines which may be requested - they must be closed
+// independently.
+func (c *Chip) Close() error {
+	c.mu.Lock()
+	closed := c.closed
+	c.closed = true
+	c.mu.Unlock()
+	if closed {
+		return ErrClosed
+	}
+	if c.iw != nil {
+		c.iw.close()
+	}
+	return c.f.Close()
+}
+
+// FindLine returns the offset of the named line, or an error if not found.
+func (c *Chip) FindLine(name string) (int, error) {
+	for o := 0; o < c.lines; o++ {
+		inf, err := c.LineInfo(o)
+		if err != nil {
+			return 0, err
+		}
+		if inf.Name == name {
+			return o, nil
+		}
+	}
+	return 0, ErrLineNotFound
+}
+
+// FindLines returns the offsets of the named lines, or an error unless all are
+// found.
+func (c *Chip) FindLines(names ...string) (oo []int, err error) {
+	ioo := make([]int, len(names))
+	for i, name := range names {
+		var o int
+		o, err = c.FindLine(name)
+		if err != nil {
+			return
+		}
+		ioo[i] = o
+	}
+	oo = ioo
+	return
+}
+
+// LineInfo returns the publically available information on the line.
+//
+// This is always available and does not require requesting the line.
+func (c *Chip) LineInfo(offset int) (info LineInfo, err error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.closed {
+		err = ErrClosed
+		return
+	}
+	if offset < 0 || offset >= c.lines {
+		err = ErrInvalidOffset
+		return
+	}
+	var li uapi.LineInfo
+	li, err = uapi.GetLineInfo(c.f.Fd(), offset)
+	if err == nil {
+		info = newLineInfo(li)
+	}
+	return
+}
+
+func newLineInfo(li uapi.LineInfo) LineInfo {
+	return LineInfo{
+		Offset:      int(li.Offset),
+		Name:        uapi.BytesToString(li.Name[:]),
+		Consumer:    uapi.BytesToString(li.Consumer[:]),
+		Requested:   li.Flags.IsRequested(),
+		IsOut:       li.Flags.IsOut(),
+		ActiveLow:   li.Flags.IsActiveLow(),
+		OpenDrain:   li.Flags.IsOpenDrain(),
+		OpenSource:  li.Flags.IsOpenSource(),
+		BiasDisable: li.Flags.IsBiasDisable(),
+		PullDown:    li.Flags.IsPullDown(),
+		PullUp:      li.Flags.IsPullUp(),
+	}
+}
+
+// Lines returns the number of lines that exist on the GPIO chip.
+func (c *Chip) Lines() int {
+	return c.lines
+}
+
+// RequestLine requests control of a single line on the chip.
+//
+// If granted, control is maintained until either the Line or Chip are closed.
+func (c *Chip) RequestLine(offset int, options ...LineOption) (*Line, error) {
+	ll, err := c.RequestLines([]int{offset}, options...)
+	if err != nil {
+		return nil, err
+	}
+	l := Line{baseLine{
+		offsets:      ll.offsets,
+		vfd:          ll.vfd,
+		isEvent:      ll.isEvent,
+		chip:         c.Name,
+		flags:        ll.flags,
+		outputValues: ll.outputValues,
+		w:            ll.w,
+	}}
+	return &l, nil
+}
+
+// RequestLines requests control of a collection of lines on the chip.
+func (c *Chip) RequestLines(offsets []int, options ...LineOption) (*Lines, error) {
+	for _, o := range offsets {
+		if o < 0 || o >= c.lines {
+			return nil, ErrInvalidOffset
+		}
+	}
+	lo := LineOptions{
+		consumer:    c.options.consumer,
+		HandleFlags: c.options.HandleFlags,
+	}
+	for _, option := range options {
+		option.applyLineOption(&lo)
+	}
+	ll := Lines{baseLine{
+		offsets:      append([]int(nil), offsets...),
+		chip:         c.Name,
+		flags:        lo.HandleFlags,
+		outputValues: lo.InitialValues,
+	}}
+	var err error
+	if lo.eh != nil {
+		ll.isEvent = true
+		ll.vfd, ll.w, err = c.getEventRequest(ll.offsets, lo)
+	} else {
+		ll.vfd, err = c.getHandleRequest(ll.offsets, lo)
+	}
+	if err != nil {
+		return nil, err
+	}
+	return &ll, nil
+}
+
+// creates the iw and ich
+//
+// Assumes c is locked.
+func (c *Chip) createInfoWatcher() error {
+	iw, err := newInfoWatcher(int(c.f.Fd()),
+		func(lic LineInfoChangeEvent) {
+			c.mu.Lock()
+			ich := c.ich[lic.Info.Offset]
+			c.mu.Unlock() // handler called outside lock
+			if ich != nil {
+				ich(lic)
+			}
+		})
+	if err != nil {
+		return err
+	}
+	c.iw = iw
+	c.ich = map[int]InfoChangeHandler{}
+	return nil
+}
+
+// WatchLineInfo enables watching changes to line info for the specified lines.
+//
+// The changes are reported via the chip InfoChangeHandler.
+// Repeated calls replace the InfoChangeHandler.
+//
+// Requires Linux v5.7 or later.
+func (c *Chip) WatchLineInfo(offset int, lich InfoChangeHandler) (info LineInfo, err error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.closed {
+		err = ErrClosed
+		return
+	}
+	if c.iw == nil {
+		err = c.createInfoWatcher()
+		if err != nil {
+			return
+		}
+	}
+	li := uapi.LineInfo{Offset: uint32(offset)}
+	err = uapi.WatchLineInfo(c.f.Fd(), &li)
+	if err != nil {
+		return
+	}
+	c.ich[offset] = lich
+	info = newLineInfo(li)
+	return
+}
+
+// UnwatchLineInfo disables watching changes to line info.
+//
+// Requires Linux v5.7 or later.
+func (c *Chip) UnwatchLineInfo(offset int) error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.closed {
+		return nil
+	}
+	delete(c.ich, offset)
+	return uapi.UnwatchLineInfo(c.f.Fd(), uint32(offset))
+}
+
+func (c *Chip) getEventRequest(offsets []int, lo LineOptions) (uintptr, *watcher, error) {
+	var vfd uintptr
+	fds := make(map[int]int)
+	for i, o := range offsets {
+		er := uapi.EventRequest{
+			Offset:      uint32(o),
+			HandleFlags: lo.HandleFlags,
+			EventFlags:  lo.EventFlags,
+		}
+		copy(er.Consumer[:len(er.Consumer)-1], lo.consumer)
+		err := uapi.GetLineEvent(c.f.Fd(), &er)
+		if err != nil {
+			return 0, nil, err
+		}
+		fd := uintptr(er.Fd)
+		if i == 0 {
+			vfd = fd
+		}
+		fds[int(fd)] = o
+	}
+	w, err := newWatcher(fds, lo.eh)
+	if err != nil {
+		for fd := range fds {
+			unix.Close(fd)
+		}
+		return 0, nil, err
+	}
+	return vfd, w, nil
+}
+
+func (c *Chip) getHandleRequest(offsets []int, lo LineOptions) (uintptr, error) {
+	hr := uapi.HandleRequest{
+		Lines: uint32(len(offsets)),
+		Flags: lo.HandleFlags,
+	}
+	copy(hr.Consumer[:len(hr.Consumer)-1], lo.consumer)
+	// copy(hr.Offsets[:], offsets) - with cast
+	for i, o := range offsets {
+		hr.Offsets[i] = uint32(o)
+	}
+	// copy(hr.DefaultValues[:], lo.InitialValues) - with cast
+	for i, v := range lo.InitialValues {
+		hr.DefaultValues[i] = uint8(v)
+	}
+	err := uapi.GetLineHandle(c.f.Fd(), &hr)
+	if err != nil {
+		return 0, err
+	}
+	return uintptr(hr.Fd), nil
+}
+
+type baseLine struct {
+	offsets []int
+	vfd     uintptr
+	isEvent bool
+	chip    string
+	// mu covers all that follow - those above are immutable
+	mu           sync.Mutex
+	flags        uapi.HandleFlag
+	outputValues []int
+	info         []*LineInfo
+	closed       bool
+	w            *watcher
+}
+
+// Chip returns the name of the chip from which the line was requested.
+func (l *baseLine) Chip() string {
+	return l.chip
+}
+
+// Close releases all resources held by the requested line.
+func (l *baseLine) Close() error {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		return ErrClosed
+	}
+	l.closed = true
+	if l.w != nil {
+		l.w.close()
+	} else {
+		unix.Close(int(l.vfd))
+	}
+	return nil
+}
+
+// Reconfigure updates the configuration of the requested line(s).
+//
+// Configuration for options other than those passed in remain unchanged.
+//
+// Not valid for lines with edge detection enabled.
+//
+// Requires Linux v5.5 or later.
+func (l *baseLine) Reconfigure(options ...LineConfig) error {
+	if l.isEvent {
+		return ErrPermissionDenied
+	}
+	if len(options) == 0 {
+		return nil
+	}
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		return ErrClosed
+	}
+	lo := LineOptions{
+		HandleFlags:   l.flags,
+		InitialValues: l.outputValues,
+	}
+	for _, option := range options {
+		option.applyLineConfig(&lo)
+	}
+	hc := uapi.HandleConfig{Flags: lo.HandleFlags}
+	for i, v := range lo.InitialValues {
+		hc.DefaultValues[i] = uint8(v)
+	}
+	err := uapi.SetLineConfig(l.vfd, &hc)
+	if err == nil {
+		l.flags = hc.Flags
+	}
+	return err
+}
+
+// Line represents a single requested line.
+type Line struct {
+	baseLine
+}
+
+// Offset returns the offset of the line within the chip.
+func (l *Line) Offset() int {
+	return l.offsets[0]
+}
+
+// Info returns the information about the line.
+func (l *Line) Info() (info LineInfo, err error) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		err = ErrClosed
+		return
+	}
+	if l.info != nil {
+		info = *l.info[0]
+		return
+	}
+	c, err := NewChip(l.chip)
+	if err != nil {
+		return
+	}
+	defer c.Close()
+	inf, err := c.LineInfo(l.offsets[0])
+	if err != nil {
+		return
+	}
+	l.info = []*LineInfo{&inf}
+	info = *l.info[0]
+	return
+}
+
+// Value returns the current value (active state) of the line.
+func (l *Line) Value() (int, error) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		return 0, ErrClosed
+	}
+	var values uapi.HandleData
+	err := uapi.GetLineValues(l.vfd, &values)
+	return int(values[0]), err
+}
+
+// SetValue sets the current active state of the line.
+//
+// Only valid for output lines.
+func (l *Line) SetValue(value int) error {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if !l.flags.IsOutput() {
+		return ErrPermissionDenied
+	}
+	if l.closed {
+		return ErrClosed
+	}
+	l.outputValues = []int{value}
+	var values uapi.HandleData
+	values[0] = uint8(value)
+	return uapi.SetLineValues(l.vfd, values)
+}
+
+// Lines represents a collection of requested lines.
+type Lines struct {
+	baseLine
+}
+
+// Offsets returns the offsets of the lines within the chip.
+func (l *Lines) Offsets() []int {
+	return l.offsets
+}
+
+// Info returns the information about the lines.
+func (l *Lines) Info() ([]*LineInfo, error) {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		return nil, ErrClosed
+	}
+	if l.info != nil {
+		return l.info, nil
+	}
+	c, err := NewChip(l.chip)
+	if err != nil {
+		return nil, err
+	}
+	defer c.Close()
+	info := make([]*LineInfo, len(l.offsets))
+	for i, o := range l.offsets {
+		inf, err := c.LineInfo(o)
+		if err != nil {
+			return nil, err
+		}
+		info[i] = &inf
+	}
+	l.info = info
+	return l.info, nil
+}
+
+// Values returns the current values (active state) of the collection of lines.
+//
+// Gets as many values from the set, in order, as can be fit in values, up to
+// the full set.
+func (l *Lines) Values(values []int) error {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if l.closed {
+		return ErrClosed
+	}
+	var uvv uapi.HandleData
+	err := uapi.GetLineValues(l.vfd, &uvv)
+	if err != nil {
+		return err
+	}
+	lines := len(l.offsets)
+	if len(values) < lines {
+		lines = len(values)
+	}
+	for i := 0; i < lines; i++ {
+		values[i] = int(uvv[i])
+	}
+	return nil
+}
+
+// SetValues sets the current active state of the collection of lines.
+//
+// Only valid for output lines.
+//
+// All lines in the set are set at once.  If insufficient values are provided
+// then the remaining lines are set to inactive.
+func (l *Lines) SetValues(values []int) error {
+	l.mu.Lock()
+	defer l.mu.Unlock()
+	if !l.flags.IsOutput() {
+		return ErrPermissionDenied
+	}
+	if len(values) > len(l.offsets) {
+		return ErrInvalidOffset
+	}
+	if l.closed {
+		return ErrClosed
+	}
+	l.outputValues = append([]int(nil), values...)
+	var vv uapi.HandleData
+	for i, v := range values {
+		vv[i] = uint8(v)
+	}
+	return uapi.SetLineValues(l.vfd, vv)
+}
+
+// LineEventType indicates the type of change to the line active state.
+//
+// Note that for active low lines a low line level results in a high active
+// state.
+type LineEventType int
+
+const (
+	_ LineEventType = iota
+	// LineEventRisingEdge indicates an inactive to active event.
+	LineEventRisingEdge
+
+	// LineEventFallingEdge indicates an active to inactive event.
+	LineEventFallingEdge
+)
+
+// LineEvent represents a change in the state of a line.
+type LineEvent struct {
+	// The line offset within the GPIO chip.
+	Offset int
+
+	// Timestamp indicates the time the event was detected.
+	//
+	// The timestamp is intended for accurately measuring intervals between
+	// events. It is not guaranteed to be based on a particular clock. It has
+	// been based on CLOCK_REALTIME, but from Linux v5.7 it is based on
+	// CLOCK_MONOTONIC.
+	Timestamp time.Duration
+
+	// The type of state change event this structure represents.
+	Type LineEventType
+}
+
+// LineInfoChangeEvent represents a change in the info a line.
+type LineInfoChangeEvent struct {
+	// Info is the updated line info.
+	Info LineInfo
+
+	// Timestamp indicates the time the event was detected.
+	//
+	// The timestamp is intended for accurately measuring intervals between
+	// events. It is not guaranteed to be based on a particular clock, but from
+	// Linux v5.7 it is based on CLOCK_MONOTONIC.
+	Timestamp time.Duration
+
+	// The type of info change event this structure represents.
+	Type LineInfoChangeType
+}
+
+// LineInfoChangeType indicates the type of change to the line info.
+type LineInfoChangeType int
+
+const (
+	_ LineInfoChangeType = iota
+
+	// LineRequested indicates the line has been requested.
+	LineRequested
+
+	// LineReleased indicates the line has been released.
+	LineReleased
+
+	// LineReconfigured indicates the line configuration has changed.
+	LineReconfigured
+)
+
+// InfoChangeHandler is a receiver for line info change events.
+type InfoChangeHandler func(LineInfoChangeEvent)
+
+// IsChip checks if the named device is an accessible GPIO character device.
+//
+// Returns an error if not.
+func IsChip(name string) error {
+	path := nameToPath(name)
+	fi, err := os.Lstat(path)
+	if err != nil {
+		return err
+	}
+	if fi.Mode()&os.ModeCharDevice == 0 {
+		return ErrNotCharacterDevice
+	}
+	sysfspath := fmt.Sprintf("/sys/bus/gpio/devices/%s/dev", fi.Name())
+	if err = unix.Access(sysfspath, unix.R_OK); err != nil {
+		return ErrNotCharacterDevice
+	}
+	sysfsf, err := os.Open(sysfspath)
+	if err != nil {
+		// changed since Access?
+		return ErrNotCharacterDevice
+	}
+	var sysfsdev [16]byte
+	n, err := sysfsf.Read(sysfsdev[:])
+	sysfsf.Close()
+	if err != nil || n <= 0 {
+		return ErrNotCharacterDevice
+	}
+	var stat unix.Stat_t
+	if err = unix.Lstat(path, &stat); err != nil {
+		return err
+	}
+	devstr := fmt.Sprintf("%d:%d", unix.Major(uint64(stat.Rdev)), unix.Minor(uint64(stat.Rdev)))
+	sysstr := string(sysfsdev[:n-1])
+	if devstr != sysstr {
+		return ErrNotCharacterDevice
+	}
+	return nil
+}
+
+// chipNames returns the name of potential gpiochips.
+//
+// Does not open them or check if they are valid.
+func chipNames() []string {
+	ee, err := ioutil.ReadDir("/dev")
+	if err != nil {
+		return nil
+	}
+	cc := []string(nil)
+	for _, e := range ee {
+		name := e.Name()
+		if strings.HasPrefix(name, "gpiochip") {
+			cc = append(cc, name)
+		}
+	}
+	return cc
+}
+
+// helper that finds the chip and offset corresponding to a named line.
+//
+// If found returns the chip and offset, else an error.
+func findLine(lname string) (*Chip, int, error) {
+	for _, name := range chipNames() {
+		c, err := NewChip(name)
+		if err != nil {
+			continue
+		}
+		o, err := c.FindLine(lname)
+		if err == nil {
+			return c, o, nil
+		}
+	}
+	return nil, 0, ErrLineNotFound
+}
+
+func nameToPath(name string) string {
+	if strings.HasPrefix(name, "/dev/") {
+		return name
+	}
+	return "/dev/" + name
+}
+
+var (
+	// ErrClosed indicates the chip or line has already been closed.
+	ErrClosed = errors.New("already closed")
+
+	// ErrInvalidOffset indicates a line offset is invalid.
+	ErrInvalidOffset = errors.New("invalid offset")
+
+	// ErrNotCharacterDevice indicates the device is not a character device.
+	ErrNotCharacterDevice = errors.New("not a character device")
+
+	// ErrLineNotFound indicates the line was not found.
+	ErrLineNotFound = errors.New("line not found")
+
+	// ErrPermissionDenied indicates caller does not have required permissions
+	// for the operation.
+	ErrPermissionDenied = errors.New("permission denied")
+)
--- a/vendor/github.com/warthog618/gpiod/infowatcher.go
+++ b/vendor/github.com/warthog618/gpiod/infowatcher.go
@ -0,0 +1,111 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2020 Kent Gibson <warthog618@gmail.com>.
+
+package gpiod
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/warthog618/gpiod/uapi"
+	"golang.org/x/sys/unix"
+)
+
+type infoWatcher struct {
+	epfd int
+
+	// the handler for detected events
+	ch InfoChangeHandler
+
+	// pipe to signal watcher to shutdown
+	donefds []int
+
+	// closed once watcher exits
+	doneCh chan struct{}
+}
+
+func newInfoWatcher(fd int, ch InfoChangeHandler) (iw *infoWatcher, err error) {
+	var epfd int
+	epfd, err = unix.EpollCreate1(unix.EPOLL_CLOEXEC)
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err != nil {
+			unix.Close(epfd)
+		}
+	}()
+	p := []int{0, 0}
+	err = unix.Pipe2(p, unix.O_CLOEXEC)
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err != nil {
+			unix.Close(p[0])
+			unix.Close(p[1])
+		}
+	}()
+	epv := unix.EpollEvent{Events: unix.EPOLLIN, Fd: int32(p[0])}
+	err = unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(p[0]), &epv)
+	if err != nil {
+		return
+	}
+	epv.Fd = int32(fd)
+	err = unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, fd, &epv)
+	if err != nil {
+		return
+	}
+	iw = &infoWatcher{
+		epfd:    epfd,
+		ch:      ch,
+		donefds: p,
+		doneCh:  make(chan struct{}),
+	}
+	go iw.watch()
+	return
+}
+
+func (iw *infoWatcher) close() {
+	unix.Write(iw.donefds[1], []byte("bye"))
+	<-iw.doneCh
+	unix.Close(iw.donefds[0])
+	unix.Close(iw.donefds[1])
+}
+
+func (iw *infoWatcher) watch() {
+	epollEvents := make([]unix.EpollEvent, 2)
+	defer close(iw.doneCh)
+	for {
+		n, err := unix.EpollWait(iw.epfd, epollEvents[:], -1)
+		if err != nil {
+			if err == unix.EBADF || err == unix.EINVAL {
+				// fd closed so exit
+				return
+			}
+			if err == unix.EINTR {
+				continue
+			}
+			panic(fmt.Sprintf("EpollWait unexpected error: %v", err))
+		}
+		for i := 0; i < n; i++ {
+			ev := epollEvents[i]
+			fd := ev.Fd
+			if fd == int32(iw.donefds[0]) {
+				unix.Close(iw.epfd)
+				return
+			}
+			lic, err := uapi.ReadLineInfoChanged(uintptr(fd))
+			if err != nil {
+				continue
+			}
+			lice := LineInfoChangeEvent{
+				Info:      newLineInfo(lic.Info),
+				Timestamp: time.Duration(lic.Timestamp),
+				Type:      LineInfoChangeType(lic.Type),
+			}
+			iw.ch(lice)
+		}
+	}
+}
--- a/vendor/github.com/warthog618/gpiod/options.go
+++ b/vendor/github.com/warthog618/gpiod/options.go
@ -0,0 +1,293 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+package gpiod
+
+import "github.com/warthog618/gpiod/uapi"
+
+// ChipOption defines the interface required to provide a Chip option.
+type ChipOption interface {
+	applyChipOption(*ChipOptions)
+}
+
+// ChipOptions contains the options for a Chip.
+type ChipOptions struct {
+	consumer    string
+	HandleFlags uapi.HandleFlag
+}
+
+// ConsumerOption defines the consumer label for a line.
+type ConsumerOption string
+
+// WithConsumer provides the consumer label for the line.
+//
+// When applied to a chip it provides the default consumer label for all lines
+// requested by the chip.
+func WithConsumer(consumer string) ConsumerOption {
+	return ConsumerOption(consumer)
+}
+
+func (o ConsumerOption) applyChipOption(c *ChipOptions) {
+	c.consumer = string(o)
+}
+
+func (o ConsumerOption) applyLineOption(l *LineOptions) {
+	l.consumer = string(o)
+}
+
+// LineOption defines the interface required to provide an option for Line and
+// Lines.
+type LineOption interface {
+	applyLineOption(*LineOptions)
+}
+
+// LineConfig defines the interface required to update an option for Line and
+// Lines.
+type LineConfig interface {
+	applyLineConfig(*LineOptions)
+}
+
+// LineOptions contains the options for a Line or Lines.
+type LineOptions struct {
+	consumer      string
+	InitialValues []int
+	EventFlags    uapi.EventFlag
+	HandleFlags   uapi.HandleFlag
+	eh            EventHandler
+}
+
+// EventHandler is a receiver for line events.
+type EventHandler func(LineEvent)
+
+// AsIsOption indicates the line direction should be left as is.
+type AsIsOption struct{}
+
+// AsIs indicates that a line be requested as neither an input or output.
+//
+// That is its direction is left as is. This option overrides and clears any
+// previous Input or Output options.
+var AsIs = AsIsOption{}
+
+func (o AsIsOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags &= ^(uapi.HandleRequestOutput | uapi.HandleRequestInput)
+}
+
+// InputOption indicates the line direction should be set to an input.
+type InputOption struct{}
+
+// AsInput indicates that a line be requested as an input.
+//
+// This option overrides and clears any previous Output, OpenDrain, or
+// OpenSource options.
+var AsInput = InputOption{}
+
+func (o InputOption) updateFlags(f uapi.HandleFlag) uapi.HandleFlag {
+	f &= ^(uapi.HandleRequestOutput |
+		uapi.HandleRequestOpenDrain |
+		uapi.HandleRequestOpenSource)
+	f |= uapi.HandleRequestInput
+	return f
+}
+
+func (o InputOption) applyChipOption(c *ChipOptions) {
+	c.HandleFlags = o.updateFlags(c.HandleFlags)
+}
+
+func (o InputOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags = o.updateFlags(l.HandleFlags)
+}
+
+func (o InputOption) applyLineConfig(l *LineOptions) {
+	o.applyLineOption(l)
+}
+
+// OutputOption indicates the line direction should be set to an output.
+type OutputOption struct {
+	initialValues []int
+}
+
+// AsOutput indicates that a line or lines be requested as an output.
+//
+// The initial active state for the line(s) can optionally be provided.
+// If fewer values are provided than lines then the remaining lines default to
+// inactive.
+//
+// This option overrides and clears any previous Input, RisingEdge, FallingEdge,
+// or BothEdges options.
+func AsOutput(values ...int) OutputOption {
+	vv := append([]int(nil), values...)
+	return OutputOption{vv}
+}
+
+func (o OutputOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags &= ^uapi.HandleRequestInput
+	l.HandleFlags |= uapi.HandleRequestOutput
+	l.EventFlags = 0
+	l.InitialValues = o.initialValues
+}
+
+func (o OutputOption) applyLineConfig(l *LineOptions) {
+	o.applyLineOption(l)
+}
+
+// LevelOption determines the line level that is considered active.
+type LevelOption struct {
+	flag uapi.HandleFlag
+}
+
+func (o LevelOption) updateFlags(f uapi.HandleFlag) uapi.HandleFlag {
+	f &= ^uapi.HandleRequestActiveLow
+	f |= o.flag
+	return f
+}
+
+func (o LevelOption) applyChipOption(c *ChipOptions) {
+	c.HandleFlags = o.updateFlags(c.HandleFlags)
+}
+
+func (o LevelOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags = o.updateFlags(l.HandleFlags)
+}
+
+func (o LevelOption) applyLineConfig(l *LineOptions) {
+	o.applyLineOption(l)
+}
+
+// AsActiveLow indicates that a line be considered active when the line level
+// is low.
+var AsActiveLow = LevelOption{uapi.HandleRequestActiveLow}
+
+// AsActiveHigh indicates that a line be considered active when the line level
+// is high.
+//
+// This is the default active level.
+var AsActiveHigh = LevelOption{}
+
+// DriveOption determines if a line is open drain, open source or push-pull.
+type DriveOption struct {
+	flag uapi.HandleFlag
+}
+
+func (o DriveOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags &= ^(uapi.HandleRequestInput |
+		uapi.HandleRequestOpenDrain |
+		uapi.HandleRequestOpenSource)
+	l.HandleFlags |= (o.flag | uapi.HandleRequestOutput)
+	l.EventFlags = 0
+}
+
+func (o DriveOption) applyLineConfig(l *LineOptions) {
+	o.applyLineOption(l)
+}
+
+// AsOpenDrain indicates that a line be driven low but left floating for high.
+//
+// This option sets the Output option and overrides and clears any previous
+// Input, RisingEdge, FallingEdge, BothEdges, or OpenSource options.
+var AsOpenDrain = DriveOption{uapi.HandleRequestOpenDrain}
+
+// AsOpenSource indicates that a line be driven low but left floating for high.
+//
+// This option sets the Output option and overrides and clears any previous
+// Input, RisingEdge, FallingEdge, BothEdges, or OpenDrain options.
+var AsOpenSource = DriveOption{uapi.HandleRequestOpenSource}
+
+// AsPushPull indicates that a line be driven both low and high.
+//
+// This option sets the Output option and overrides and clears any previous
+// Input, RisingEdge, FallingEdge, BothEdges, OpenDrain, or OpenSource options.
+var AsPushPull = DriveOption{}
+
+// BiasOption indicates how a line is to be biased.
+//
+// Bias options require Linux v5.5 or later.
+type BiasOption struct {
+	flag uapi.HandleFlag
+}
+
+func (o BiasOption) updateFlags(f uapi.HandleFlag) uapi.HandleFlag {
+	f &= ^(uapi.HandleRequestBiasDisable |
+		uapi.HandleRequestPullDown |
+		uapi.HandleRequestPullUp)
+	f |= o.flag
+	return f
+}
+
+func (o BiasOption) applyChipOption(c *ChipOptions) {
+	c.HandleFlags = o.updateFlags(c.HandleFlags)
+}
+
+func (o BiasOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags = o.updateFlags(l.HandleFlags)
+}
+
+func (o BiasOption) applyLineConfig(l *LineOptions) {
+	o.applyLineOption(l)
+}
+
+// WithBiasDisable indicates that a line have its internal bias disabled.
+//
+// This option overrides and clears any previous bias options.
+//
+// Requires Linux v5.5 or later.
+var WithBiasDisable = BiasOption{uapi.HandleRequestBiasDisable}
+
+// WithPullDown indicates that a line have its internal pull-down enabled.
+//
+// This option overrides and clears any previous bias options.
+//
+// Requires Linux v5.5 or later.
+var WithPullDown = BiasOption{uapi.HandleRequestPullDown}
+
+// WithPullUp indicates that a line have its internal pull-up enabled.
+//
+// This option overrides and clears any previous bias options.
+//
+// Requires Linux v5.5 or later.
+var WithPullUp = BiasOption{uapi.HandleRequestPullUp}
+
+// EdgeOption indicates that a line will generate events when edges are detected.
+type EdgeOption struct {
+	e    EventHandler
+	edge uapi.EventFlag
+}
+
+func (o EdgeOption) applyLineOption(l *LineOptions) {
+	l.HandleFlags &= ^(uapi.HandleRequestOutput |
+		uapi.HandleRequestOpenDrain |
+		uapi.HandleRequestOpenSource)
+	l.HandleFlags |= uapi.HandleRequestInput
+	l.EventFlags = o.edge
+	l.eh = o.e
+}
+
+// WithFallingEdge indicates that a line will generate events when its active
+// state transitions from high to low.
+//
+// Events are forwarded to the provided handler function.
+// This option sets the Input option and overrides and clears any previous
+// Output, OpenDrain, or OpenSource options.
+func WithFallingEdge(e func(LineEvent)) EdgeOption {
+	return EdgeOption{EventHandler(e), uapi.EventRequestFallingEdge}
+}
+
+// WithRisingEdge indicates that a line will generate events when its active
+// state transitions from low to high.
+//
+// Events are forwarded to the provided handler function.
+// This option sets the Input option and overrides and clears any previous
+// Output, OpenDrain, or OpenSource options.
+func WithRisingEdge(e func(LineEvent)) EdgeOption {
+	return EdgeOption{EventHandler(e), uapi.EventRequestRisingEdge}
+}
+
+// WithBothEdges indicates that a line will generate events when its active
+// state transitions from low to high and from high to low.
+//
+// Events are forwarded to the provided handler function.
+// This option sets the Input option and overrides and clears any previous
+// Output, OpenDrain, or OpenSource options.
+func WithBothEdges(e func(LineEvent)) EdgeOption {
+	return EdgeOption{EventHandler(e), uapi.EventRequestBothEdges}
+}
--- a/vendor/github.com/warthog618/gpiod/uapi/README.md
+++ b/vendor/github.com/warthog618/gpiod/uapi/README.md
@ -0,0 +1,75 @@
+# uapi
+
+[![GoDoc](https://godoc.org/github.com/warthog618/gpiod?status.svg)](https://godoc.org/github.com/warthog618/gpiod/uapi)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://github.com/warthog618/gpiod/blob/master/LICENSE)
+
+GPIOD UAPI is a thin layer over the system ioctl calls that comprise the Linux GPIO UAPI.
+
+This library is used by **[gpiod](https://github.com/warthog618/gpiod)** to interact with the Linux kernel.
+
+The library is exposed to allow for testing of the UAPI with the minimal amount of Go in the way.
+
+**gpiod** provides a higher level of abstraction, so for general use you probably want to be using that.
+
+## API
+
+The GPIO UAPI comprises six ioctls:
+
+IOCTL | Scope | Description
+---|--- | ---
+[GetChipInfo](https://godoc.org/github.com/warthog618/gpiod/uapi#GetChipInfo) | chip | Returns information about the chip itself.
+[GetLineInfo](https://godoc.org/github.com/warthog618/gpiod/uapi#GetLineInfo) | chip | Returns information about a particular line on the chip.
+[GetLineHandle](https://godoc.org/github.com/warthog618/gpiod/uapi#GetLineHandle) | chip | Requests a set of lines, and returns a file handle for ioctl commands.  The set may be any subset of the lines supported by the chip, including a single line.  This may be used for both input and output lines.  The lines remain reserved by the caller until the returned fd is closed.
+[GetLineEvent](https://godoc.org/github.com/warthog618/gpiod/uapi#GetLineEvent) | chip | Requests an individual input line with edge detection enabled, and returns a file handle for ioctl commands and to return edge events.  Events can only be requested on input lines.  The line remains reserved by the caller until the returned fd is closed.
+[GetLineValues](https://godoc.org/github.com/warthog618/gpiod/uapi#GetLineValues) | line | Returns the current value of a set of lines.
+[SetLineValues](https://godoc.org/github.com/warthog618/gpiod/uapi#SetLineValues) | line | Sets the current value of a set of lines.
+
+## Usage
+
+The following is a brief example of the usage of each of the major functions:
+
+```go
+    f, _ := os.OpenFile("/dev/gpiochip0", unix.O_CLOEXEC, unix.O_RDONLY)
+
+    // get chip info
+    ci, _ := uapi.GetChipInfo(f.Fd())
+
+    // get line info
+    li, _ := uapi.GetLineInfo(f.Fd(), offset)
+
+    // request a line
+    hr := uapi.HandleRequest{
+        Lines: uint32(len(offsets)),
+        Flags: handleFlags,
+        // initialise Offsets, DefaultValues and Consumer...
+    }
+    err := uapi.GetLineHandle(f.Fd(), &hr)
+
+    // request a line with events
+    er := uapi.EventRequest{
+        Offset:      offset,
+        HandleFlags: handleFlags,
+        EventFlags:  eventFlags,
+        // initialise Consumer...
+    }
+    err := uapi.GetLineEvent(f.Fd(), &er)
+    if err != nil {
+        // wait on er.fd for events...
+
+        // read event
+        evt, _ := uapi.ReadEvent(er.fd)
+    }
+
+    // get values
+    var values uapi.HandleData
+    _ := uapi.GetLineValues(er.fd, &values)
+
+    // set values
+    values[0] = uint8(value)
+    _ := uapi.SetLineValues(hr.fd, values)
+
+```
+
+Error handling and other tedious bits, such as initialising the arrays in the requests, omitted for brevity.
+
+Refer to **[gpiod](https://github.com/warthog618/gpiod)** for a concrete example of uapi usage.
--- a/vendor/github.com/warthog618/gpiod/uapi/endian.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/endian.go
@ -0,0 +1,31 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+// don't build on platforms with fixed endianness
+// +build !amd64
+// +build !386
+
+package uapi
+
+import (
+	"encoding/binary"
+	"unsafe"
+)
+
+// endian to use to decode reads from the local kernel.
+var nativeEndian binary.ByteOrder
+
+func init() {
+	// the standard hack to determine native Endianness.
+	buf := [2]byte{}
+	*(*uint16)(unsafe.Pointer(&buf[0])) = uint16(0xABCD)
+	switch buf {
+	case [2]byte{0xCD, 0xAB}:
+		nativeEndian = binary.LittleEndian
+	case [2]byte{0xAB, 0xCD}:
+		nativeEndian = binary.BigEndian
+	default:
+		panic("Could not determine native endianness.")
+	}
+}
--- a/vendor/github.com/warthog618/gpiod/uapi/endian_intel.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/endian_intel.go
@ -0,0 +1,14 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+// +build 386 amd64
+
+package uapi
+
+import (
+	"encoding/binary"
+)
+
+// endian to use to decode reads from the local kernel.
+var nativeEndian binary.ByteOrder = binary.LittleEndian
--- a/vendor/github.com/warthog618/gpiod/uapi/ioctl.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/ioctl.go
@ -0,0 +1,30 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2020 Kent Gibson <warthog618@gmail.com>.
+
+// +build linux
+
+package uapi
+
+// ioctl constants defined in ioctl_XXX
+
+func ior(t, nr, size uintptr) ioctl {
+	return ioctl((iocRead << iocDirShift) |
+		(size << iocSizeShift) |
+		(t << iocTypeShift) |
+		(nr << iocNRShift))
+}
+
+func iorw(t, nr, size uintptr) ioctl {
+	return ioctl(((iocRead | iocWrite) << iocDirShift) |
+		(size << iocSizeShift) |
+		(t << iocTypeShift) |
+		(nr << iocNRShift))
+}
+
+func iow(t, nr, size uintptr) ioctl {
+	return ioctl((iocWrite << iocDirShift) |
+		(size << iocSizeShift) |
+		(t << iocTypeShift) |
+		(nr << iocNRShift))
+}
--- a/vendor/github.com/warthog618/gpiod/uapi/ioctl_default.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/ioctl_default.go
@ -0,0 +1,21 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2020 Kent Gibson <warthog618@gmail.com>.
+
+// +build arm arm64 386 amd64
+
+package uapi
+
+// ioctl constants
+const (
+	iocNRBits    = 8
+	iocTypeBits  = 8
+	iocDirBits   = 2
+	iocSizeBits  = 14
+	iocNRShift   = 0
+	iocTypeShift = iocNRShift + iocNRBits
+	iocSizeShift = iocTypeShift + iocTypeBits
+	iocDirShift  = iocSizeShift + iocSizeBits
+	iocWrite     = 1
+	iocRead      = 2
+)
--- a/vendor/github.com/warthog618/gpiod/uapi/ioctl_mips32.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/ioctl_mips32.go
@ -0,0 +1,22 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2020 Kent Gibson <warthog618@gmail.com>.
+
+// +build mips mipsle mips64 mips64le ppc64 ppc64le sparc sparc64
+
+package uapi
+
+// ioctl constants
+const (
+	iocNRBits    = 8
+	iocTypeBits  = 8
+	iocDirBits   = 3
+	iocSizeBits  = 13
+	iocNRShift   = 0
+	iocTypeShift = iocNRShift + iocNRBits
+	iocSizeShift = iocTypeShift + iocTypeBits
+	iocDirShift  = iocSizeShift + iocSizeBits
+	iocWrite     = 4
+	iocRead      = 2
+	// iocNone = 1
+)
--- a/vendor/github.com/warthog618/gpiod/uapi/uapi.go
+++ b/vendor/github.com/warthog618/gpiod/uapi/uapi.go
@ -0,0 +1,570 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+// +build linux
+
+// Package uapi provides the Linux GPIO UAPI definitions for gpiod.
+package uapi
+
+import (
+	"bytes"
+	"encoding/binary"
+	"unsafe"
+
+	"golang.org/x/sys/unix"
+)
+
+// GetChipInfo returns the ChipInfo for the GPIO character device.
+//
+// The fd is an open GPIO character device.
+func GetChipInfo(fd uintptr) (ChipInfo, error) {
+	var ci ChipInfo
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(getChipInfoIoctl),
+		uintptr(unsafe.Pointer(&ci)))
+	if errno != 0 {
+		return ci, errno
+	}
+	return ci, nil
+}
+
+// GetLineInfo returns the LineInfo for one line from the GPIO character device.
+//
+// The fd is an open GPIO character device.
+// The offset is zero based.
+func GetLineInfo(fd uintptr, offset int) (LineInfo, error) {
+	var li LineInfo
+	li.Offset = uint32(offset)
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(getLineInfoIoctl),
+		uintptr(unsafe.Pointer(&li)))
+	if errno != 0 {
+		return LineInfo{}, errno
+	}
+	return li, nil
+}
+
+// GetLineEvent requests a line from the GPIO character device with event
+// reporting enabled.
+//
+// The fd is an open GPIO character device.
+// The line must be an input and must not already be requested.
+// If successful, the fd for the line is returned in the request.fd.
+func GetLineEvent(fd uintptr, request *EventRequest) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(getLineEventIoctl),
+		uintptr(unsafe.Pointer(request)))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// GetLineHandle requests a line from the GPIO character device.
+//
+// This request is without event reporting.
+// The fd is an open GPIO character device.
+// The lines must not already be requested.
+// The flags in the request will be applied to all lines in the request.
+// If successful, the fd for the line is returned in the request.fd.
+func GetLineHandle(fd uintptr, request *HandleRequest) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(getLineHandleIoctl),
+		uintptr(unsafe.Pointer(request)))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// GetLineValues returns the values of a set of requested lines.
+//
+// The fd is a requested line, as returned by GetLineHandle or GetLineEvent.
+func GetLineValues(fd uintptr, values *HandleData) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(getLineValuesIoctl),
+		uintptr(unsafe.Pointer(&values[0])))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// SetLineValues sets the values of a set of requested lines.
+//
+// The fd is a requested line, as returned by GetLineHandle or GetLineEvent.
+func SetLineValues(fd uintptr, values HandleData) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(setLineValuesIoctl),
+		uintptr(unsafe.Pointer(&values[0])))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// SetLineConfig sets the config of an existing handle request.
+//
+// The config flags in the request will be applied to all lines in the handle
+// request.
+func SetLineConfig(fd uintptr, config *HandleConfig) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(setLineConfigIoctl),
+		uintptr(unsafe.Pointer(config)))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// WatchLineInfo sets a watch on info of a line.
+//
+// A watch is set on the line indicated by info.Offset. If successful the
+// current line info is returned, else an error is returned.
+func WatchLineInfo(fd uintptr, info *LineInfo) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(watchLineInfoIoctl),
+		uintptr(unsafe.Pointer(info)))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// UnwatchLineInfo clears a watch on info of a line.
+//
+// Disables the watch on info for the line.
+func UnwatchLineInfo(fd uintptr, offset uint32) error {
+	_, _, errno := unix.Syscall(unix.SYS_IOCTL,
+		fd,
+		uintptr(unwatchLineInfoIoctl),
+		uintptr(unsafe.Pointer(&offset)))
+	if errno != 0 {
+		return errno
+	}
+	return nil
+}
+
+// BytesToString is a helper function that converts strings stored in byte
+// arrays, as returned by GetChipInfo and GetLineInfo, into strings.
+func BytesToString(a []byte) string {
+	n := bytes.IndexByte(a, 0)
+	if n == -1 {
+		return string(a)
+	}
+	return string(a[:n])
+}
+
+type fdReader int
+
+func (fd fdReader) Read(b []byte) (int, error) {
+	return unix.Read(int(fd), b[:])
+}
+
+// ReadEvent reads a single event from a requested line.
+//
+// The fd is a requested line, as returned by GetLineEvent.
+//
+// This function is blocking and should only be called when the fd is known to
+// be ready to read.
+func ReadEvent(fd uintptr) (EventData, error) {
+	var ed EventData
+	err := binary.Read(fdReader(fd), nativeEndian, &ed)
+	return ed, err
+}
+
+// ReadLineInfoChanged reads a line info changed event from a chip.
+//
+// The fd is an open GPIO character device.
+//
+// This function is blocking and should only be called when the fd is known to
+// be ready to read.
+func ReadLineInfoChanged(fd uintptr) (LineInfoChanged, error) {
+	var lic LineInfoChanged
+	err := binary.Read(fdReader(fd), nativeEndian, &lic)
+	return lic, err
+}
+
+// IOCTL command codes
+type ioctl uintptr
+
+var (
+	getChipInfoIoctl     ioctl
+	getLineInfoIoctl     ioctl
+	getLineHandleIoctl   ioctl
+	getLineEventIoctl    ioctl
+	getLineValuesIoctl   ioctl
+	setLineValuesIoctl   ioctl
+	setLineConfigIoctl   ioctl
+	watchLineInfoIoctl   ioctl
+	unwatchLineInfoIoctl ioctl
+)
+
+// Size of name and consumer strings.
+const nameSize = 32
+
+func init() {
+	// ioctls require struct sizes which are only available at runtime.
+	var ci ChipInfo
+	getChipInfoIoctl = ior(0xB4, 0x01, unsafe.Sizeof(ci))
+	var li LineInfo
+	getLineInfoIoctl = iorw(0xB4, 0x02, unsafe.Sizeof(li))
+	var hr HandleRequest
+	getLineHandleIoctl = iorw(0xB4, 0x03, unsafe.Sizeof(hr))
+	var le EventRequest
+	getLineEventIoctl = iorw(0xB4, 0x04, unsafe.Sizeof(le))
+	var hd HandleData
+	getLineValuesIoctl = iorw(0xB4, 0x08, unsafe.Sizeof(hd))
+	setLineValuesIoctl = iorw(0xB4, 0x09, unsafe.Sizeof(hd))
+	var hc HandleConfig
+	setLineConfigIoctl = iorw(0xB4, 0x0a, unsafe.Sizeof(hc))
+	watchLineInfoIoctl = iorw(0xB4, 0x0b, unsafe.Sizeof(li))
+	unwatchLineInfoIoctl = iorw(0xB4, 0x0c, unsafe.Sizeof(li.Offset))
+}
+
+// ChipInfo contains the details of a GPIO chip.
+type ChipInfo struct {
+	// The system name of the device.
+	Name [nameSize]byte
+
+	// An identifying label added by the device driver.
+	Label [nameSize]byte
+
+	// The number of lines supported by this chip.
+	Lines uint32
+}
+
+// LineInfo contains the details of a single line of a GPIO chip.
+type LineInfo struct {
+	// The offset of the line within the chip.
+	Offset uint32
+
+	// The line flags applied to this line.
+	Flags LineFlag
+
+	// The system name for this line.
+	Name [nameSize]byte
+
+	// If requested, a string added by the requester to identify the
+	// owner of the request.
+	Consumer [nameSize]byte
+}
+
+// LineInfoChanged contains the details of a change to line info.
+//
+// This is returned via the chip fd in response to changes to watched lines.
+type LineInfoChanged struct {
+	// The updated info.
+	Info LineInfo
+
+	// The time the change occured.
+	Timestamp uint64
+
+	// The type of change.
+	Type ChangeType
+
+	// reserved for future use.
+	_ [5]uint32
+}
+
+// ChangeType indicates the type of change that has occured to a line.
+type ChangeType uint32
+
+const (
+	_ ChangeType = iota
+
+	// LineChangedRequested indicates the line has been requested.
+	LineChangedRequested
+
+	// LineChangedReleased indicates the line has been released.
+	LineChangedReleased
+
+	// LineChangedConfig indicates the line configuration has changed.
+	LineChangedConfig
+)
+
+// LineFlag are the flags for a line.
+type LineFlag uint32
+
+const (
+	// LineFlagRequested indicates that the line has been requested.
+	// It may have been requested by this process or another process.
+	// The line cannot be requested again until this flag is clear.
+	LineFlagRequested LineFlag = 1 << iota
+
+	// LineFlagIsOut indicates that the line is an output.
+	LineFlagIsOut
+
+	// LineFlagActiveLow indicates that the line is active low.
+	LineFlagActiveLow
+
+	// LineFlagOpenDrain indicates that the line will pull low when set low but
+	// float when set high. This flag only applies to output lines.
+	// An output cannot be both open drain and open source.
+	LineFlagOpenDrain
+
+	// LineFlagOpenSource indicates that the line will pull high when set high
+	// but float when set low. This flag only applies to output lines.
+	// An output cannot be both open drain and open source.
+	LineFlagOpenSource
+
+	// LineFlagPullUp indicates that the internal line pull up is enabled.
+	LineFlagPullUp
+
+	// LineFlagPullDown indicates that the internal line pull down is enabled.
+	LineFlagPullDown
+
+	// LineFlagBiasDisable indicates that the internal line bias is disabled.
+	LineFlagBiasDisable
+)
+
+// IsRequested returns true if the line is requested.
+func (f LineFlag) IsRequested() bool {
+	return f&LineFlagRequested != 0
+}
+
+// IsOut returns true if the line is an output.
+func (f LineFlag) IsOut() bool {
+	return f&LineFlagIsOut != 0
+}
+
+// IsActiveLow returns true if the line is active low.
+func (f LineFlag) IsActiveLow() bool {
+	return f&LineFlagActiveLow != 0
+}
+
+// IsOpenDrain returns true if the line is open-drain.
+func (f LineFlag) IsOpenDrain() bool {
+	return f&LineFlagOpenDrain != 0
+}
+
+// IsOpenSource returns true if the line is open-source.
+func (f LineFlag) IsOpenSource() bool {
+	return f&LineFlagOpenSource != 0
+}
+
+// IsBiasDisable returns true if the line has bias disabled.
+func (f LineFlag) IsBiasDisable() bool {
+	return f&LineFlagBiasDisable != 0
+}
+
+// IsPullDown returns true if the line has pull-down enabled.
+func (f LineFlag) IsPullDown() bool {
+	return f&LineFlagPullDown != 0
+}
+
+// IsPullUp returns true if the line has pull-up enabled.
+func (f LineFlag) IsPullUp() bool {
+	return f&LineFlagPullUp != 0
+}
+
+// HandleConfig is a request to change the config of an existing request.
+//
+// Can be applied to both handle and event requests.
+// Event requests cannot be reconfigured to outputs.
+type HandleConfig struct {
+	// The flags to be applied to the lines.
+	Flags HandleFlag
+
+	// The default values to be applied to output lines (when
+	// HandleRequestOutput is set in the Flags).
+	DefaultValues [HandlesMax]uint8
+
+	// reserved for future use.
+	_ [4]uint32
+}
+
+// HandleRequest is a request for control of a set of lines.
+// The lines must all be on the same GPIO chip.
+type HandleRequest struct {
+	// The lines to be requested.
+	Offsets [HandlesMax]uint32
+
+	// The flags to be applied to the lines.
+	Flags HandleFlag
+
+	// The default values to be applied to output lines.
+	DefaultValues [HandlesMax]uint8
+
+	// The string identifying the requester to be applied to the lines.
+	Consumer [nameSize]byte
+
+	// The number of lines being requested.
+	Lines uint32
+
+	// The file handle for the requested lines.
+	// Set if the request is successful.
+	Fd int32
+}
+
+// HandleFlag contains the
+type HandleFlag uint32
+
+const (
+	// HandleRequestInput requests the line as an input.
+	//
+	// This is ignored if Output is also set.
+	HandleRequestInput HandleFlag = 1 << iota
+
+	// HandleRequestOutput requests the line as an output.
+	//
+	// This takes precedence over Input, if both are set.
+	HandleRequestOutput
+
+	// HandleRequestActiveLow requests the line be made active low.
+	HandleRequestActiveLow
+
+	// HandleRequestOpenDrain requests the line be made open drain.
+	//
+	// This option requires the line to be requested as an Output.
+	// This cannot be set at the same time as OpenSource.
+	HandleRequestOpenDrain
+
+	// HandleRequestOpenSource requests the line be made open source.
+	//
+	// This option requires the line to be requested as an Output.
+	// This cannot be set at the same time as OpenDrain.
+	HandleRequestOpenSource
+
+	// HandleRequestPullUp requests the line have pull-up enabled.
+	HandleRequestPullUp
+
+	// HandleRequestPullDown requests the line have pull-down enabled.
+	HandleRequestPullDown
+
+	// HandleRequestBiasDisable requests the line have bias disabled.
+	HandleRequestBiasDisable
+
+	// HandlesMax is the maximum number of lines that can be requested in a
+	// single request.
+	HandlesMax = 64
+)
+
+// IsInput returns true if the line is requested as an input.
+func (f HandleFlag) IsInput() bool {
+	return f&HandleRequestInput != 0
+}
+
+// IsOutput returns true if the line is requested as an output.
+func (f HandleFlag) IsOutput() bool {
+	return f&HandleRequestOutput != 0
+}
+
+// IsActiveLow returns true if the line is requested as a active low.
+func (f HandleFlag) IsActiveLow() bool {
+	return f&HandleRequestActiveLow != 0
+}
+
+// IsOpenDrain returns true if the line is requested as an open drain.
+func (f HandleFlag) IsOpenDrain() bool {
+	return f&HandleRequestOpenDrain != 0
+}
+
+// IsOpenSource returns true if the line is requested as an open source.
+func (f HandleFlag) IsOpenSource() bool {
+	return f&HandleRequestOpenSource != 0
+}
+
+// IsBiasDisable returns true if the line is requested with bias disabled.
+func (f HandleFlag) IsBiasDisable() bool {
+	return f&HandleRequestBiasDisable != 0
+}
+
+// IsPullDown returns true if the line is requested with pull-down enabled.
+func (f HandleFlag) IsPullDown() bool {
+	return f&HandleRequestPullDown != 0
+}
+
+// IsPullUp returns true if the line is requested with pull-up enabled.
+func (f HandleFlag) IsPullUp() bool {
+	return f&HandleRequestPullUp != 0
+}
+
+// HandleData contains the logical value for each line.
+// Zero is a logical low and any other value is a logical high.
+type HandleData [HandlesMax]uint8
+
+// EventRequest is a request for control of a line with event reporting enabled.
+type EventRequest struct {
+	// The line to be requested.
+	Offset uint32
+
+	// The line flags applied to this line.
+	HandleFlags HandleFlag
+
+	// The type of events to report.
+	EventFlags EventFlag
+
+	// The string identifying the requester to be applied to the line.
+	Consumer [nameSize]byte
+
+	// The file handle for the requested line.
+	// Set if the request is successful.
+	Fd int32
+}
+
+// EventFlag indicates the types of events that will be reported.
+type EventFlag uint32
+
+const (
+	// EventRequestRisingEdge requests rising edge events.
+	// This means a transition from a low logical state to a high logical state.
+	// For active high lines (the default) this means a transition from a
+	// physical low to a physical high.
+	// Note that for active low lines this means a transition from a physical
+	// high to a physical low.
+	EventRequestRisingEdge EventFlag = 1 << iota
+
+	// EventRequestFallingEdge requests falling edge events.
+	// This means a transition from a high logical state to a low logical state.
+	// For active high lines (the default) this means a transition from a
+	// physical high to a physical low.
+	// Note that for active low lines this means a transition from a physical
+	// low to a physical high.
+	EventRequestFallingEdge
+
+	// EventRequestBothEdges requests both rising and falling edge events.
+	// This is equivalent to requesting both EventRequestRisingEdge and
+	// EventRequestRisingEdge.
+	EventRequestBothEdges = EventRequestRisingEdge | EventRequestFallingEdge
+)
+
+// IsRisingEdge returns true if rising edge events have been requested.
+func (f EventFlag) IsRisingEdge() bool {
+	return f&EventRequestRisingEdge != 0
+}
+
+// IsFallingEdge returns true if falling edge events have been requested.
+func (f EventFlag) IsFallingEdge() bool {
+	return f&EventRequestFallingEdge != 0
+}
+
+// IsBothEdges returns true if both rising and falling edge events have been
+// requested.
+func (f EventFlag) IsBothEdges() bool {
+	return f&EventRequestBothEdges == EventRequestBothEdges
+}
+
+// EventData contains the details of a particular line event.
+//
+// This is returned via the event request fd in response to events.
+type EventData struct {
+	// The time the event was detected.
+	Timestamp uint64
+
+	// The type of event detected.
+	ID uint32
+
+	// pad to workaround 64bit OS padding
+	_ uint32
+}
+
--- a/vendor/github.com/warthog618/gpiod/watcher.go
+++ b/vendor/github.com/warthog618/gpiod/watcher.go
@ -0,0 +1,120 @@
+// SPDX-License-Identifier: MIT
+//
+// Copyright © 2019 Kent Gibson <warthog618@gmail.com>.
+
+package gpiod
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/warthog618/gpiod/uapi"
+	"golang.org/x/sys/unix"
+)
+
+type watcher struct {
+	epfd int
+
+	// fd to offset mapping
+	evtfds map[int]int
+
+	// the handler for detected events
+	eh EventHandler
+
+	// pipe to signal watcher to shutdown
+	donefds []int
+
+	// closed once watcher exits
+	doneCh chan struct{}
+}
+
+func newWatcher(fds map[int]int, eh EventHandler) (w *watcher, err error) {
+	var epfd int
+	epfd, err = unix.EpollCreate1(unix.EPOLL_CLOEXEC)
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err != nil {
+			unix.Close(epfd)
+		}
+	}()
+	p := []int{0, 0}
+	err = unix.Pipe2(p, unix.O_CLOEXEC)
+	if err != nil {
+		return
+	}
+	defer func() {
+		if err != nil {
+			unix.Close(p[0])
+			unix.Close(p[1])
+		}
+	}()
+	epv := unix.EpollEvent{Events: unix.EPOLLIN, Fd: int32(p[0])}
+	err = unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, int(p[0]), &epv)
+	if err != nil {
+		return
+	}
+	for fd := range fds {
+		epv.Fd = int32(fd)
+		err = unix.EpollCtl(epfd, unix.EPOLL_CTL_ADD, fd, &epv)
+		if err != nil {
+			return
+		}
+	}
+	w = &watcher{
+		epfd:    epfd,
+		evtfds:  fds,
+		eh:      eh,
+		donefds: p,
+		doneCh:  make(chan struct{}),
+	}
+	go w.watch()
+	return
+}
+
+func (w *watcher) close() {
+	unix.Write(w.donefds[1], []byte("bye"))
+	<-w.doneCh
+	for fd := range w.evtfds {
+		unix.Close(fd)
+	}
+	unix.Close(w.donefds[0])
+	unix.Close(w.donefds[1])
+}
+
+func (w *watcher) watch() {
+	epollEvents := make([]unix.EpollEvent, len(w.evtfds))
+	defer close(w.doneCh)
+	for {
+		n, err := unix.EpollWait(w.epfd, epollEvents[:], -1)
+		if err != nil {
+			if err == unix.EBADF || err == unix.EINVAL {
+				// fd closed so exit
+				return
+			}
+			if err == unix.EINTR {
+				continue
+			}
+			panic(fmt.Sprintf("EpollWait unexpected error: %v", err))
+		}
+		for i := 0; i < n; i++ {
+			ev := epollEvents[i]
+			fd := ev.Fd
+			if fd == int32(w.donefds[0]) {
+				unix.Close(w.epfd)
+				return
+			}
+			evt, err := uapi.ReadEvent(uintptr(fd))
+			if err != nil {
+				continue
+			}
+			le := LineEvent{
+				Offset:    w.evtfds[int(fd)],
+				Timestamp: time.Duration(evt.Timestamp),
+				Type:      LineEventType(evt.ID),
+			}
+			w.eh(le)
+		}
+	}
+}
--- a/vendor/golang.org/x/sync/AUTHORS
+++ b/vendor/golang.org/x/sync/AUTHORS
@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at http://tip.golang.org/AUTHORS.
--- a/vendor/golang.org/x/sync/CONTRIBUTORS
+++ b/vendor/golang.org/x/sync/CONTRIBUTORS
@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at http://tip.golang.org/CONTRIBUTORS.
--- a/vendor/golang.org/x/sync/LICENSE
+++ b/vendor/golang.org/x/sync/LICENSE
@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/vendor/golang.org/x/sync/PATENTS
+++ b/vendor/golang.org/x/sync/PATENTS
@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
--- a/vendor/golang.org/x/sync/errgroup/errgroup.go
+++ b/vendor/golang.org/x/sync/errgroup/errgroup.go
@ -0,0 +1,66 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package errgroup provides synchronization, error propagation, and Context
+// cancelation for groups of goroutines working on subtasks of a common task.
+package errgroup
+
+import (
+	"context"
+	"sync"
+)
+
+// A Group is a collection of goroutines working on subtasks that are part of
+// the same overall task.
+//
+// A zero Group is valid and does not cancel on error.
+type Group struct {
+	cancel func()
+
+	wg sync.WaitGroup
+
+	errOnce sync.Once
+	err     error
+}
+
+// WithContext returns a new Group and an associated Context derived from ctx.
+//
+// The derived Context is canceled the first time a function passed to Go
+// returns a non-nil error or the first time Wait returns, whichever occurs
+// first.
+func WithContext(ctx context.Context) (*Group, context.Context) {
+	ctx, cancel := context.WithCancel(ctx)
+	return &Group{cancel: cancel}, ctx
+}
+
+// Wait blocks until all function calls from the Go method have returned, then
+// returns the first non-nil error (if any) from them.
+func (g *Group) Wait() error {
+	g.wg.Wait()
+	if g.cancel != nil {
+		g.cancel()
+	}
+	return g.err
+}
+
+// Go calls the given function in a new goroutine.
+//
+// The first call to return a non-nil error cancels the group; its error will be
+// returned by Wait.
+func (g *Group) Go(f func() error) {
+	g.wg.Add(1)
+
+	go func() {
+		defer g.wg.Done()
+
+		if err := f(); err != nil {
+			g.errOnce.Do(func() {
+				g.err = err
+				if g.cancel != nil {
+					g.cancel()
+				}
+			})
+		}
+	}()
+}
--- a/vendor/golang.org/x/sys/AUTHORS
+++ b/vendor/golang.org/x/sys/AUTHORS
@ -0,0 +1,3 @@
+# This source code refers to The Go Authors for copyright purposes.
+# The master list of authors is in the main Go distribution,
+# visible at http://tip.golang.org/AUTHORS.
--- a/vendor/golang.org/x/sys/CONTRIBUTORS
+++ b/vendor/golang.org/x/sys/CONTRIBUTORS
@ -0,0 +1,3 @@
+# This source code was written by the Go contributors.
+# The master list of contributors is in the main Go distribution,
+# visible at http://tip.golang.org/CONTRIBUTORS.
--- a/vendor/golang.org/x/sys/LICENSE
+++ b/vendor/golang.org/x/sys/LICENSE
@ -0,0 +1,27 @@
+Copyright (c) 2009 The Go Authors. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Google Inc. nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
--- a/vendor/golang.org/x/sys/PATENTS
+++ b/vendor/golang.org/x/sys/PATENTS
@ -0,0 +1,22 @@
+Additional IP Rights Grant (Patents)
+
+"This implementation" means the copyrightable works distributed by
+Google as part of the Go project.
+
+Google hereby grants to You a perpetual, worldwide, non-exclusive,
+no-charge, royalty-free, irrevocable (except as stated in this section)
+patent license to make, have made, use, offer to sell, sell, import,
+transfer and otherwise run, modify and propagate the contents of this
+implementation of Go, where such license applies only to those patent
+claims, both currently owned or controlled by Google and acquired in
+the future, licensable by Google that are necessarily infringed by this
+implementation of Go.  This grant does not include claims that would be
+infringed only as a consequence of further modification of this
+implementation.  If you or your agent or exclusive licensee institute or
+order or agree to the institution of patent litigation against any
+entity (including a cross-claim or counterclaim in a lawsuit) alleging
+that this implementation of Go or any code incorporated within this
+implementation of Go constitutes direct or contributory patent
+infringement, or inducement of patent infringement, then any patent
+rights granted to you under this License for this implementation of Go
+shall terminate as of the date such litigation is filed.
--- a/vendor/golang.org/x/sys/unix/.gitignore
+++ b/vendor/golang.org/x/sys/unix/.gitignore
@ -0,0 +1,2 @@
+_obj/
+unix.test
--- a/vendor/golang.org/x/sys/unix/README.md
+++ b/vendor/golang.org/x/sys/unix/README.md
@ -0,0 +1,173 @@
+# Building `sys/unix`
+
+The sys/unix package provides access to the raw system call interface of the
+underlying operating system. See: https://godoc.org/golang.org/x/sys/unix
+
+Porting Go to a new architecture/OS combination or adding syscalls, types, or
+constants to an existing architecture/OS pair requires some manual effort;
+however, there are tools that automate much of the process.
+
+## Build Systems
+
+There are currently two ways we generate the necessary files. We are currently
+migrating the build system to use containers so the builds are reproducible.
+This is being done on an OS-by-OS basis. Please update this documentation as
+components of the build system change.
+
+### Old Build System (currently for `GOOS != "linux"`)
+
+The old build system generates the Go files based on the C header files
+present on your system. This means that files
+for a given GOOS/GOARCH pair must be generated on a system with that OS and
+architecture. This also means that the generated code can differ from system
+to system, based on differences in the header files.
+
+To avoid this, if you are using the old build system, only generate the Go
+files on an installation with unmodified header files. It is also important to
+keep track of which version of the OS the files were generated from (ex.
+Darwin 14 vs Darwin 15). This makes it easier to track the progress of changes
+and have each OS upgrade correspond to a single change.
+
+To build the files for your current OS and architecture, make sure GOOS and
+GOARCH are set correctly and run `mkall.sh`. This will generate the files for
+your specific system. Running `mkall.sh -n` shows the commands that will be run.
+
+Requirements: bash, go
+
+### New Build System (currently for `GOOS == "linux"`)
+
+The new build system uses a Docker container to generate the go files directly
+from source checkouts of the kernel and various system libraries. This means
+that on any platform that supports Docker, all the files using the new build
+system can be generated at once, and generated files will not change based on
+what the person running the scripts has installed on their computer.
+
+The OS specific files for the new build system are located in the `${GOOS}`
+directory, and the build is coordinated by the `${GOOS}/mkall.go` program. When
+the kernel or system library updates, modify the Dockerfile at
+`${GOOS}/Dockerfile` to checkout the new release of the source.
+
+To build all the files under the new build system, you must be on an amd64/Linux
+system and have your GOOS and GOARCH set accordingly. Running `mkall.sh` will
+then generate all of the files for all of the GOOS/GOARCH pairs in the new build
+system. Running `mkall.sh -n` shows the commands that will be run.
+
+Requirements: bash, go, docker
+
+## Component files
+
+This section describes the various files used in the code generation process.
+It also contains instructions on how to modify these files to add a new
+architecture/OS or to add additional syscalls, types, or constants. Note that
+if you are using the new build system, the scripts/programs cannot be called normally.
+They must be called from within the docker container.
+
+### asm files
+
+The hand-written assembly file at `asm_${GOOS}_${GOARCH}.s` implements system
+call dispatch. There are three entry points:
+```
+  func Syscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+  func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr)
+  func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2, err uintptr)
+```
+The first and second are the standard ones; they differ only in how many
+arguments can be passed to the kernel. The third is for low-level use by the
+ForkExec wrapper. Unlike the first two, it does not call into the scheduler to
+let it know that a system call is running.
+
+When porting Go to an new architecture/OS, this file must be implemented for
+each GOOS/GOARCH pair.
+
+### mksysnum
+
+Mksysnum is a Go program located at `${GOOS}/mksysnum.go` (or `mksysnum_${GOOS}.go`
+for the old system). This program takes in a list of header files containing the
+syscall number declarations and parses them to produce the corresponding list of
+Go numeric constants. See `zsysnum_${GOOS}_${GOARCH}.go` for the generated
+constants.
+
+Adding new syscall numbers is mostly done by running the build on a sufficiently
+new installation of the target OS (or updating the source checkouts for the
+new build system). However, depending on the OS, you make need to update the
+parsing in mksysnum.
+
+### mksyscall.go
+
+The `syscall.go`, `syscall_${GOOS}.go`, `syscall_${GOOS}_${GOARCH}.go` are
+hand-written Go files which implement system calls (for unix, the specific OS,
+or the specific OS/Architecture pair respectively) that need special handling
+and list `//sys` comments giving prototypes for ones that can be generated.
+
+The mksyscall.go program takes the `//sys` and `//sysnb` comments and converts
+them into syscalls. This requires the name of the prototype in the comment to
+match a syscall number in the `zsysnum_${GOOS}_${GOARCH}.go` file. The function
+prototype can be exported (capitalized) or not.
+
+Adding a new syscall often just requires adding a new `//sys` function prototype
+with the desired arguments and a capitalized name so it is exported. However, if
+you want the interface to the syscall to be different, often one will make an
+unexported `//sys` prototype, an then write a custom wrapper in
+`syscall_${GOOS}.go`.
+
+### types files
+
+For each OS, there is a hand-written Go file at `${GOOS}/types.go` (or
+`types_${GOOS}.go` on the old system). This file includes standard C headers and
+creates Go type aliases to the corresponding C types. The file is then fed
+through godef to get the Go compatible definitions. Finally, the generated code
+is fed though mkpost.go to format the code correctly and remove any hidden or
+private identifiers. This cleaned-up code is written to
+`ztypes_${GOOS}_${GOARCH}.go`.
+
+The hardest part about preparing this file is figuring out which headers to
+include and which symbols need to be `#define`d to get the actual data
+structures that pass through to the kernel system calls. Some C libraries
+preset alternate versions for binary compatibility and translate them on the
+way in and out of system calls, but there is almost always a `#define` that can
+get the real ones.
+See `types_darwin.go` and `linux/types.go` for examples.
+
+To add a new type, add in the necessary include statement at the top of the
+file (if it is not already there) and add in a type alias line. Note that if
+your type is significantly different on different architectures, you may need
+some `#if/#elif` macros in your include statements.
+
+### mkerrors.sh
+
+This script is used to generate the system's various constants. This doesn't
+just include the error numbers and error strings, but also the signal numbers
+an a wide variety of miscellaneous constants. The constants come from the list
+of include files in the `includes_${uname}` variable. A regex then picks out
+the desired `#define` statements, and generates the corresponding Go constants.
+The error numbers and strings are generated from `#include <errno.h>`, and the
+signal numbers and strings are generated from `#include <signal.h>`. All of
+these constants are written to `zerrors_${GOOS}_${GOARCH}.go` via a C program,
+`_errors.c`, which prints out all the constants.
+
+To add a constant, add the header that includes it to the appropriate variable.
+Then, edit the regex (if necessary) to match the desired constant. Avoid making
+the regex too broad to avoid matching unintended constants.
+
+
+## Generated files
+
+### `zerror_${GOOS}_${GOARCH}.go`
+
+A file containing all of the system's generated error numbers, error strings,
+signal numbers, and constants. Generated by `mkerrors.sh` (see above).
+
+### `zsyscall_${GOOS}_${GOARCH}.go`
+
+A file containing all the generated syscalls for a specific GOOS and GOARCH.
+Generated by `mksyscall.go` (see above).
+
+### `zsysnum_${GOOS}_${GOARCH}.go`
+
+A list of numeric constants for all the syscall number of the specific GOOS
+and GOARCH. Generated by mksysnum (see above).
+
+### `ztypes_${GOOS}_${GOARCH}.go`
+
+A file containing Go types for passing into (or returning from) syscalls.
+Generated by godefs and the types file (see above).
--- a/vendor/golang.org/x/sys/unix/affinity_linux.go
+++ b/vendor/golang.org/x/sys/unix/affinity_linux.go
@ -0,0 +1,86 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// CPU affinity functions
+
+package unix
+
+import (
+	"math/bits"
+	"unsafe"
+)
+
+const cpuSetSize = _CPU_SETSIZE / _NCPUBITS
+
+// CPUSet represents a CPU affinity mask.
+type CPUSet [cpuSetSize]cpuMask
+
+func schedAffinity(trap uintptr, pid int, set *CPUSet) error {
+	_, _, e := RawSyscall(trap, uintptr(pid), uintptr(unsafe.Sizeof(*set)), uintptr(unsafe.Pointer(set)))
+	if e != 0 {
+		return errnoErr(e)
+	}
+	return nil
+}
+
+// SchedGetaffinity gets the CPU affinity mask of the thread specified by pid.
+// If pid is 0 the calling thread is used.
+func SchedGetaffinity(pid int, set *CPUSet) error {
+	return schedAffinity(SYS_SCHED_GETAFFINITY, pid, set)
+}
+
+// SchedSetaffinity sets the CPU affinity mask of the thread specified by pid.
+// If pid is 0 the calling thread is used.
+func SchedSetaffinity(pid int, set *CPUSet) error {
+	return schedAffinity(SYS_SCHED_SETAFFINITY, pid, set)
+}
+
+// Zero clears the set s, so that it contains no CPUs.
+func (s *CPUSet) Zero() {
+	for i := range s {
+		s[i] = 0
+	}
+}
+
+func cpuBitsIndex(cpu int) int {
+	return cpu / _NCPUBITS
+}
+
+func cpuBitsMask(cpu int) cpuMask {
+	return cpuMask(1 << (uint(cpu) % _NCPUBITS))
+}
+
+// Set adds cpu to the set s.
+func (s *CPUSet) Set(cpu int) {
+	i := cpuBitsIndex(cpu)
+	if i < len(s) {
+		s[i] |= cpuBitsMask(cpu)
+	}
+}
+
+// Clear removes cpu from the set s.
+func (s *CPUSet) Clear(cpu int) {
+	i := cpuBitsIndex(cpu)
+	if i < len(s) {
+		s[i] &^= cpuBitsMask(cpu)
+	}
+}
+
+// IsSet reports whether cpu is in the set s.
+func (s *CPUSet) IsSet(cpu int) bool {
+	i := cpuBitsIndex(cpu)
+	if i < len(s) {
+		return s[i]&cpuBitsMask(cpu) != 0
+	}
+	return false
+}
+
+// Count returns the number of CPUs in the set s.
+func (s *CPUSet) Count() int {
+	c := 0
+	for _, b := range s {
+		c += bits.OnesCount64(uint64(b))
+	}
+	return c
+}
--- a/vendor/golang.org/x/sys/unix/aliases.go
+++ b/vendor/golang.org/x/sys/unix/aliases.go
@ -0,0 +1,14 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris
+// +build go1.9
+
+package unix
+
+import "syscall"
+
+type Signal = syscall.Signal
+type Errno = syscall.Errno
+type SysProcAttr = syscall.SysProcAttr
--- a/vendor/golang.org/x/sys/unix/asm_aix_ppc64.s
+++ b/vendor/golang.org/x/sys/unix/asm_aix_ppc64.s
@ -0,0 +1,17 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for ppc64, AIX are implemented in runtime/syscall_aix.go
+//
+
+TEXT ·syscall6(SB),NOSPLIT,$0-88
+	JMP	syscall·syscall6(SB)
+
+TEXT ·rawSyscall6(SB),NOSPLIT,$0-88
+	JMP	syscall·rawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_darwin_386.s
+++ b/vendor/golang.org/x/sys/unix/asm_darwin_386.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_darwin_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_darwin_amd64.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_darwin_arm.s
+++ b/vendor/golang.org/x/sys/unix/asm_darwin_arm.s
@ -0,0 +1,30 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+// +build arm,darwin
+
+#include "textflag.h"
+
+//
+// System call support for ARM, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_darwin_arm64.s
+++ b/vendor/golang.org/x/sys/unix/asm_darwin_arm64.s
@ -0,0 +1,30 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+// +build arm64,darwin
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, Darwin
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_dragonfly_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_dragonfly_amd64.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, DragonFly
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_freebsd_386.s
+++ b/vendor/golang.org/x/sys/unix/asm_freebsd_386.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_freebsd_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_freebsd_amd64.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_freebsd_arm.s
+++ b/vendor/golang.org/x/sys/unix/asm_freebsd_arm.s
@ -0,0 +1,29 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_freebsd_arm64.s
+++ b/vendor/golang.org/x/sys/unix/asm_freebsd_arm64.s
@ -0,0 +1,29 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM64, FreeBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_linux_386.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_386.s
@ -0,0 +1,65 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for 386, Linux
+//
+
+// See ../runtime/sys_linux_386.s for the reason why we always use int 0x80
+// instead of the glibc-specific "CALL 0x10(GS)".
+#define INVOKE_SYSCALL	INT	$0x80
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
+	CALL	runtime·entersyscall(SB)
+	MOVL	trap+0(FP), AX  // syscall entry
+	MOVL	a1+4(FP), BX
+	MOVL	a2+8(FP), CX
+	MOVL	a3+12(FP), DX
+	MOVL	$0, SI
+	MOVL	$0, DI
+	INVOKE_SYSCALL
+	MOVL	AX, r1+16(FP)
+	MOVL	DX, r2+20(FP)
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
+	MOVL	trap+0(FP), AX  // syscall entry
+	MOVL	a1+4(FP), BX
+	MOVL	a2+8(FP), CX
+	MOVL	a3+12(FP), DX
+	MOVL	$0, SI
+	MOVL	$0, DI
+	INVOKE_SYSCALL
+	MOVL	AX, r1+16(FP)
+	MOVL	DX, r2+20(FP)
+	RET
+
+TEXT ·socketcall(SB),NOSPLIT,$0-36
+	JMP	syscall·socketcall(SB)
+
+TEXT ·rawsocketcall(SB),NOSPLIT,$0-36
+	JMP	syscall·rawsocketcall(SB)
+
+TEXT ·seek(SB),NOSPLIT,$0-28
+	JMP	syscall·seek(SB)
--- a/vendor/golang.org/x/sys/unix/asm_linux_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_amd64.s
@ -0,0 +1,57 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for AMD64, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	CALL	runtime·entersyscall(SB)
+	MOVQ	a1+8(FP), DI
+	MOVQ	a2+16(FP), SI
+	MOVQ	a3+24(FP), DX
+	MOVQ	$0, R10
+	MOVQ	$0, R8
+	MOVQ	$0, R9
+	MOVQ	trap+0(FP), AX	// syscall entry
+	SYSCALL
+	MOVQ	AX, r1+32(FP)
+	MOVQ	DX, r2+40(FP)
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOVQ	a1+8(FP), DI
+	MOVQ	a2+16(FP), SI
+	MOVQ	a3+24(FP), DX
+	MOVQ	$0, R10
+	MOVQ	$0, R8
+	MOVQ	$0, R9
+	MOVQ	trap+0(FP), AX	// syscall entry
+	SYSCALL
+	MOVQ	AX, r1+32(FP)
+	MOVQ	DX, r2+40(FP)
+	RET
+
+TEXT ·gettimeofday(SB),NOSPLIT,$0-16
+	JMP	syscall·gettimeofday(SB)
--- a/vendor/golang.org/x/sys/unix/asm_linux_arm.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_arm.s
@ -0,0 +1,56 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for arm, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
+	BL	runtime·entersyscall(SB)
+	MOVW	trap+0(FP), R7
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
+	MOVW	$0, R3
+	MOVW	$0, R4
+	MOVW	$0, R5
+	SWI	$0
+	MOVW	R0, r1+16(FP)
+	MOVW	$0, R0
+	MOVW	R0, r2+20(FP)
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
+	MOVW	trap+0(FP), R7	// syscall entry
+	MOVW	a1+4(FP), R0
+	MOVW	a2+8(FP), R1
+	MOVW	a3+12(FP), R2
+	SWI	$0
+	MOVW	R0, r1+16(FP)
+	MOVW	$0, R0
+	MOVW	R0, r2+20(FP)
+	RET
+
+TEXT ·seek(SB),NOSPLIT,$0-28
+	B	syscall·seek(SB)
--- a/vendor/golang.org/x/sys/unix/asm_linux_arm64.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_arm64.s
@ -0,0 +1,52 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+// +build arm64
+// +build !gccgo
+
+#include "textflag.h"
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	B	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	B	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R0
+	MOVD	a2+16(FP), R1
+	MOVD	a3+24(FP), R2
+	MOVD	$0, R3
+	MOVD	$0, R4
+	MOVD	$0, R5
+	MOVD	trap+0(FP), R8	// syscall entry
+	SVC
+	MOVD	R0, r1+32(FP)	// r1
+	MOVD	R1, r2+40(FP)	// r2
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	B	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	B	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOVD	a1+8(FP), R0
+	MOVD	a2+16(FP), R1
+	MOVD	a3+24(FP), R2
+	MOVD	$0, R3
+	MOVD	$0, R4
+	MOVD	$0, R5
+	MOVD	trap+0(FP), R8	// syscall entry
+	SVC
+	MOVD	R0, r1+32(FP)
+	MOVD	R1, r2+40(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_linux_mips64x.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_mips64x.s
@ -0,0 +1,56 @@
+// Copyright 2015 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+// +build mips64 mips64le
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for mips64, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	JAL	runtime·entersyscall(SB)
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	R0, R7
+	MOVV	R0, R8
+	MOVV	R0, R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	MOVV	R2, r1+32(FP)
+	MOVV	R3, r2+40(FP)
+	JAL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOVV	a1+8(FP), R4
+	MOVV	a2+16(FP), R5
+	MOVV	a3+24(FP), R6
+	MOVV	R0, R7
+	MOVV	R0, R8
+	MOVV	R0, R9
+	MOVV	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	MOVV	R2, r1+32(FP)
+	MOVV	R3, r2+40(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_linux_mipsx.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_mipsx.s
@ -0,0 +1,54 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+// +build mips mipsle
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for mips, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-28
+	JMP syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-40
+	JMP syscall·Syscall6(SB)
+
+TEXT ·Syscall9(SB),NOSPLIT,$0-52
+	JMP syscall·Syscall9(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-24
+	JAL	runtime·entersyscall(SB)
+	MOVW	a1+4(FP), R4
+	MOVW	a2+8(FP), R5
+	MOVW	a3+12(FP), R6
+	MOVW	R0, R7
+	MOVW	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	MOVW	R2, r1+16(FP)	// r1
+	MOVW	R3, r2+20(FP)	// r2
+	JAL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-24
+	MOVW	a1+4(FP), R4
+	MOVW	a2+8(FP), R5
+	MOVW	a3+12(FP), R6
+	MOVW	trap+0(FP), R2	// syscall entry
+	SYSCALL
+	MOVW	R2, r1+16(FP)
+	MOVW	R3, r2+20(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_linux_ppc64x.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_ppc64x.s
@ -0,0 +1,44 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build linux
+// +build ppc64 ppc64le
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for ppc64, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R3
+	MOVD	a2+16(FP), R4
+	MOVD	a3+24(FP), R5
+	MOVD	R0, R6
+	MOVD	R0, R7
+	MOVD	R0, R8
+	MOVD	trap+0(FP), R9	// syscall entry
+	SYSCALL R9
+	MOVD	R3, r1+32(FP)
+	MOVD	R4, r2+40(FP)
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOVD	a1+8(FP), R3
+	MOVD	a2+16(FP), R4
+	MOVD	a3+24(FP), R5
+	MOVD	R0, R6
+	MOVD	R0, R7
+	MOVD	R0, R8
+	MOVD	trap+0(FP), R9	// syscall entry
+	SYSCALL R9
+	MOVD	R3, r1+32(FP)
+	MOVD	R4, r2+40(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_linux_riscv64.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_riscv64.s
@ -0,0 +1,47 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build riscv64,!gccgo
+
+#include "textflag.h"
+
+//
+// System calls for linux/riscv64.
+//
+// Where available, just jump to package syscall's implementation of
+// these functions.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	CALL	runtime·entersyscall(SB)
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	trap+0(FP), A7	// syscall entry
+	ECALL
+	MOV	A0, r1+32(FP)	// r1
+	MOV	A1, r2+40(FP)	// r2
+	CALL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOV	a1+8(FP), A0
+	MOV	a2+16(FP), A1
+	MOV	a3+24(FP), A2
+	MOV	trap+0(FP), A7	// syscall entry
+	ECALL
+	MOV	A0, r1+32(FP)
+	MOV	A1, r2+40(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_linux_s390x.s
+++ b/vendor/golang.org/x/sys/unix/asm_linux_s390x.s
@ -0,0 +1,56 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build s390x
+// +build linux
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for s390x, Linux
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT ·Syscall(SB),NOSPLIT,$0-56
+	BR	syscall·Syscall(SB)
+
+TEXT ·Syscall6(SB),NOSPLIT,$0-80
+	BR	syscall·Syscall6(SB)
+
+TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
+	BL	runtime·entersyscall(SB)
+	MOVD	a1+8(FP), R2
+	MOVD	a2+16(FP), R3
+	MOVD	a3+24(FP), R4
+	MOVD	$0, R5
+	MOVD	$0, R6
+	MOVD	$0, R7
+	MOVD	trap+0(FP), R1	// syscall entry
+	SYSCALL
+	MOVD	R2, r1+32(FP)
+	MOVD	R3, r2+40(FP)
+	BL	runtime·exitsyscall(SB)
+	RET
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-56
+	BR	syscall·RawSyscall(SB)
+
+TEXT ·RawSyscall6(SB),NOSPLIT,$0-80
+	BR	syscall·RawSyscall6(SB)
+
+TEXT ·RawSyscallNoError(SB),NOSPLIT,$0-48
+	MOVD	a1+8(FP), R2
+	MOVD	a2+16(FP), R3
+	MOVD	a3+24(FP), R4
+	MOVD	$0, R5
+	MOVD	$0, R6
+	MOVD	$0, R7
+	MOVD	trap+0(FP), R1	// syscall entry
+	SYSCALL
+	MOVD	R2, r1+32(FP)
+	MOVD	R3, r2+40(FP)
+	RET
--- a/vendor/golang.org/x/sys/unix/asm_netbsd_386.s
+++ b/vendor/golang.org/x/sys/unix/asm_netbsd_386.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, NetBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_netbsd_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_netbsd_amd64.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, NetBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_netbsd_arm.s
+++ b/vendor/golang.org/x/sys/unix/asm_netbsd_arm.s
@ -0,0 +1,29 @@
+// Copyright 2013 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM, NetBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_netbsd_arm64.s
+++ b/vendor/golang.org/x/sys/unix/asm_netbsd_arm64.s
@ -0,0 +1,29 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM64, NetBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_openbsd_386.s
+++ b/vendor/golang.org/x/sys/unix/asm_openbsd_386.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for 386, OpenBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	JMP	syscall·Syscall9(SB)
+
+TEXT ·RawSyscall(SB),NOSPLIT,$0-28
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_openbsd_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_openbsd_amd64.s
@ -0,0 +1,29 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for AMD64, OpenBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_openbsd_arm.s
+++ b/vendor/golang.org/x/sys/unix/asm_openbsd_arm.s
@ -0,0 +1,29 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for ARM, OpenBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-28
+	B	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-40
+	B	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-52
+	B	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-28
+	B	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-40
+	B	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_openbsd_arm64.s
+++ b/vendor/golang.org/x/sys/unix/asm_openbsd_arm64.s
@ -0,0 +1,29 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System call support for arm64, OpenBSD
+//
+
+// Just jump to package syscall's implementation for all these functions.
+// The runtime may know about them.
+
+TEXT	·Syscall(SB),NOSPLIT,$0-56
+	JMP	syscall·Syscall(SB)
+
+TEXT	·Syscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·Syscall6(SB)
+
+TEXT	·Syscall9(SB),NOSPLIT,$0-104
+	JMP	syscall·Syscall9(SB)
+
+TEXT	·RawSyscall(SB),NOSPLIT,$0-56
+	JMP	syscall·RawSyscall(SB)
+
+TEXT	·RawSyscall6(SB),NOSPLIT,$0-80
+	JMP	syscall·RawSyscall6(SB)
--- a/vendor/golang.org/x/sys/unix/asm_solaris_amd64.s
+++ b/vendor/golang.org/x/sys/unix/asm_solaris_amd64.s
@ -0,0 +1,17 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !gccgo
+
+#include "textflag.h"
+
+//
+// System calls for amd64, Solaris are implemented in runtime/syscall_solaris.go
+//
+
+TEXT ·sysvicall6(SB),NOSPLIT,$0-88
+	JMP	syscall·sysvicall6(SB)
+
+TEXT ·rawSysvicall6(SB),NOSPLIT,$0-88
+	JMP	syscall·rawSysvicall6(SB)
--- a/vendor/golang.org/x/sys/unix/bluetooth_linux.go
+++ b/vendor/golang.org/x/sys/unix/bluetooth_linux.go
@ -0,0 +1,36 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Bluetooth sockets and messages
+
+package unix
+
+// Bluetooth Protocols
+const (
+	BTPROTO_L2CAP  = 0
+	BTPROTO_HCI    = 1
+	BTPROTO_SCO    = 2
+	BTPROTO_RFCOMM = 3
+	BTPROTO_BNEP   = 4
+	BTPROTO_CMTP   = 5
+	BTPROTO_HIDP   = 6
+	BTPROTO_AVDTP  = 7
+)
+
+const (
+	HCI_CHANNEL_RAW     = 0
+	HCI_CHANNEL_USER    = 1
+	HCI_CHANNEL_MONITOR = 2
+	HCI_CHANNEL_CONTROL = 3
+	HCI_CHANNEL_LOGGING = 4
+)
+
+// Socketoption Level
+const (
+	SOL_BLUETOOTH = 0x112
+	SOL_HCI       = 0x0
+	SOL_L2CAP     = 0x6
+	SOL_RFCOMM    = 0x12
+	SOL_SCO       = 0x11
+)
--- a/vendor/golang.org/x/sys/unix/cap_freebsd.go
+++ b/vendor/golang.org/x/sys/unix/cap_freebsd.go
@ -0,0 +1,195 @@
+// Copyright 2017 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build freebsd
+
+package unix
+
+import (
+	"errors"
+	"fmt"
+)
+
+// Go implementation of C mostly found in /usr/src/sys/kern/subr_capability.c
+
+const (
+	// This is the version of CapRights this package understands. See C implementation for parallels.
+	capRightsGoVersion = CAP_RIGHTS_VERSION_00
+	capArSizeMin       = CAP_RIGHTS_VERSION_00 + 2
+	capArSizeMax       = capRightsGoVersion + 2
+)
+
+var (
+	bit2idx = []int{
+		-1, 0, 1, -1, 2, -1, -1, -1, 3, -1, -1, -1, -1, -1, -1, -1,
+		4, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
+	}
+)
+
+func capidxbit(right uint64) int {
+	return int((right >> 57) & 0x1f)
+}
+
+func rightToIndex(right uint64) (int, error) {
+	idx := capidxbit(right)
+	if idx < 0 || idx >= len(bit2idx) {
+		return -2, fmt.Errorf("index for right 0x%x out of range", right)
+	}
+	return bit2idx[idx], nil
+}
+
+func caprver(right uint64) int {
+	return int(right >> 62)
+}
+
+func capver(rights *CapRights) int {
+	return caprver(rights.Rights[0])
+}
+
+func caparsize(rights *CapRights) int {
+	return capver(rights) + 2
+}
+
+// CapRightsSet sets the permissions in setrights in rights.
+func CapRightsSet(rights *CapRights, setrights []uint64) error {
+	// This is essentially a copy of cap_rights_vset()
+	if capver(rights) != CAP_RIGHTS_VERSION_00 {
+		return fmt.Errorf("bad rights version %d", capver(rights))
+	}
+
+	n := caparsize(rights)
+	if n < capArSizeMin || n > capArSizeMax {
+		return errors.New("bad rights size")
+	}
+
+	for _, right := range setrights {
+		if caprver(right) != CAP_RIGHTS_VERSION_00 {
+			return errors.New("bad right version")
+		}
+		i, err := rightToIndex(right)
+		if err != nil {
+			return err
+		}
+		if i >= n {
+			return errors.New("index overflow")
+		}
+		if capidxbit(rights.Rights[i]) != capidxbit(right) {
+			return errors.New("index mismatch")
+		}
+		rights.Rights[i] |= right
+		if capidxbit(rights.Rights[i]) != capidxbit(right) {
+			return errors.New("index mismatch (after assign)")
+		}
+	}
+
+	return nil
+}
+
+// CapRightsClear clears the permissions in clearrights from rights.
+func CapRightsClear(rights *CapRights, clearrights []uint64) error {
+	// This is essentially a copy of cap_rights_vclear()
+	if capver(rights) != CAP_RIGHTS_VERSION_00 {
+		return fmt.Errorf("bad rights version %d", capver(rights))
+	}
+
+	n := caparsize(rights)
+	if n < capArSizeMin || n > capArSizeMax {
+		return errors.New("bad rights size")
+	}
+
+	for _, right := range clearrights {
+		if caprver(right) != CAP_RIGHTS_VERSION_00 {
+			return errors.New("bad right version")
+		}
+		i, err := rightToIndex(right)
+		if err != nil {
+			return err
+		}
+		if i >= n {
+			return errors.New("index overflow")
+		}
+		if capidxbit(rights.Rights[i]) != capidxbit(right) {
+			return errors.New("index mismatch")
+		}
+		rights.Rights[i] &= ^(right & 0x01FFFFFFFFFFFFFF)
+		if capidxbit(rights.Rights[i]) != capidxbit(right) {
+			return errors.New("index mismatch (after assign)")
+		}
+	}
+
+	return nil
+}
+
+// CapRightsIsSet checks whether all the permissions in setrights are present in rights.
+func CapRightsIsSet(rights *CapRights, setrights []uint64) (bool, error) {
+	// This is essentially a copy of cap_rights_is_vset()
+	if capver(rights) != CAP_RIGHTS_VERSION_00 {
+		return false, fmt.Errorf("bad rights version %d", capver(rights))
+	}
+
+	n := caparsize(rights)
+	if n < capArSizeMin || n > capArSizeMax {
+		return false, errors.New("bad rights size")
+	}
+
+	for _, right := range setrights {
+		if caprver(right) != CAP_RIGHTS_VERSION_00 {
+			return false, errors.New("bad right version")
+		}
+		i, err := rightToIndex(right)
+		if err != nil {
+			return false, err
+		}
+		if i >= n {
+			return false, errors.New("index overflow")
+		}
+		if capidxbit(rights.Rights[i]) != capidxbit(right) {
+			return false, errors.New("index mismatch")
+		}
+		if (rights.Rights[i] & right) != right {
+			return false, nil
+		}
+	}
+
+	return true, nil
+}
+
+func capright(idx uint64, bit uint64) uint64 {
+	return ((1 << (57 + idx)) | bit)
+}
+
+// CapRightsInit returns a pointer to an initialised CapRights structure filled with rights.
+// See man cap_rights_init(3) and rights(4).
+func CapRightsInit(rights []uint64) (*CapRights, error) {
+	var r CapRights
+	r.Rights[0] = (capRightsGoVersion << 62) | capright(0, 0)
+	r.Rights[1] = capright(1, 0)
+
+	err := CapRightsSet(&r, rights)
+	if err != nil {
+		return nil, err
+	}
+	return &r, nil
+}
+
+// CapRightsLimit reduces the operations permitted on fd to at most those contained in rights.
+// The capability rights on fd can never be increased by CapRightsLimit.
+// See man cap_rights_limit(2) and rights(4).
+func CapRightsLimit(fd uintptr, rights *CapRights) error {
+	return capRightsLimit(int(fd), rights)
+}
+
+// CapRightsGet returns a CapRights structure containing the operations permitted on fd.
+// See man cap_rights_get(3) and rights(4).
+func CapRightsGet(fd uintptr) (*CapRights, error) {
+	r, err := CapRightsInit(nil)
+	if err != nil {
+		return nil, err
+	}
+	err = capRightsGet(capRightsGoVersion, int(fd), r)
+	if err != nil {
+		return nil, err
+	}
+	return r, nil
+}
--- a/Show more
+++ b/Show more