From a166f0e4b3e9f0b7f605f6b473c90c5da18c6d79 Mon Sep 17 00:00:00 2001
From: Tony Blyler <me@tonyblyler.com>
Date: Thu, 13 May 2021 23:47:38 -0400
Subject: [PATCH 1/2] Create precompress script and add a Dockerfile for
execution
---
Dockerfile | 16 +++++++++++
precompress | 80 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 96 insertions(+)
create mode 100644 Dockerfile
create mode 100755 precompress
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..704e824
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,16 @@
+FROM alpine:3.13
+
+RUN apk add --no-cache \
+ brotli \
+ pigz \
+ zstd \
+ bash \
+ the_silver_searcher
+
+COPY ./precompress /precompress
+
+VOLUME /compress-dir
+
+WORKDIR /compress-dir
+
+ENTRYPOINT ["/precompress"]
diff --git a/precompress b/precompress
new file mode 100755
index 0000000..fd8a62c
--- /dev/null
+++ b/precompress
@@ -0,0 +1,80 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+readonly SCAN_PATH="${1:-.}"
+
+case "${1:-}" in
+ '-h' | '--help' | 'help')
+ cat << 'EOF'
+ precompress
+ ===========
+
+ Usage
+ -----
+
+ precompress [path]
+
+ If path is omitted, it used the current working directory.
+
+ Primarily used for Caddy's file_sever directive's precompresed option.
+ It will compress every non brotli, zstandard, or gzip file.
+EOF
+ ;;
+esac
+
+if [ "${SCAN_PATH}" = "." ] && [ -t 0 ] && [ -t 1 ] && [ -t 2 ]; then
+ while read -r -p "About to compress all of ${PWD}, continue? [y/n] " ANSWER; do
+ case "${ANSWER}" in
+ 'y')
+ break
+ ;;
+
+ 'n')
+ exit 1
+ ;;
+ esac
+ done
+fi
+
+readonly REQUIRED_APPS=(
+ 'ag'
+ 'brotli'
+ 'cat'
+ 'nproc'
+ 'pigz'
+ 'tr'
+ 'xargs'
+ 'zstd'
+)
+
+for REQUIRED_APP in "${REQUIRED_APPS[@]}"; do
+ if ! command -v "${REQUIRED_APP}" &> /dev/null; then
+ >&2 echo "missing ${REQUIRED_APP} from PATH"
+ exit 1
+ fi
+done
+
+COMPRESS_SCRIPT="$(cat << 'EOF'
+set -euo pipefail
+
+readonly FILE_NAME="$0"
+
+errTrap() {
+ >&2 echo "failed to compress $FILE_NAME"
+}
+
+trap errTrap ERR
+
+zstd -k -T0 --ultra -20 "${FILE_NAME}" &> /dev/null &
+pigz -k -9 "${FILE_NAME}" &> /dev/null &
+brotli -k -9 "${FILE_NAME}" &> /dev/null &
+
+wait
+EOF
+)"
+readonly COMPRESS_SCRIPT
+
+ag --nocolor --ignore '*.gz' --ignore '*.zst' --ignore '*.br' -g '' -l "${SCAN_PATH}" |
+ tr '\n' '\0' |
+ xargs -0 -r -n 1 -P "$(nproc)" "$(command -v bash)" -c "${COMPRESS_SCRIPT}"
From 92d13131fc56a5126f0d1d7ecd2355264442c9f5 Mon Sep 17 00:00:00 2001
From: Tony Blyler <me@tonyblyler.com>
Date: Thu, 13 May 2021 23:49:25 -0400
Subject: [PATCH 2/2] Add basic README and fix help from not exiting early
---
README.md | 5 +++++
precompress | 1 +
2 files changed, 6 insertions(+)
diff --git a/README.md b/README.md
index 439860b..895d63e 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,7 @@
# precompress
+A script for "precompressing" static files for use with [Caddy](https://caddyserver.com/).
+
+## Documentation
+
+Run `./precompress help`
diff --git a/precompress b/precompress
index fd8a62c..c29fbea 100755
--- a/precompress
+++ b/precompress
@@ -20,6 +20,7 @@ case "${1:-}" in
Primarily used for Caddy's file_sever directive's precompresed option.
It will compress every non brotli, zstandard, or gzip file.
EOF
+ exit 0
;;
esac