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460 lines
16 KiB
Go
460 lines
16 KiB
Go
![]() |
package main
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import (
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"os"
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"path/filepath"
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"github.com/docker/docker/integration-cli/checker"
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"github.com/go-check/check"
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)
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// docker cp CONTAINER:PATH LOCALPATH
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// Try all of the test cases from the archive package which implements the
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// internals of `docker cp` and ensure that the behavior matches when actually
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// copying to and from containers.
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// Basic assumptions about SRC and DST:
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// 1. SRC must exist.
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// 2. If SRC ends with a trailing separator, it must be a directory.
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// 3. DST parent directory must exist.
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// 4. If DST exists as a file, it must not end with a trailing separator.
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// First get these easy error cases out of the way.
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// Test for error when SRC does not exist.
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func (s *DockerSuite) TestCpFromErrSrcNotExists(c *check.C) {
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containerID := makeTestContainer(c, testContainerOptions{})
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tmpDir := getTestDir(c, "test-cp-from-err-src-not-exists")
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defer os.RemoveAll(tmpDir)
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err := runDockerCp(c, containerCpPath(containerID, "file1"), tmpDir, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpNotExist(err), checker.True, check.Commentf("expected IsNotExist error, but got %T: %s", err, err))
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}
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// Test for error when SRC ends in a trailing
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// path separator but it exists as a file.
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func (s *DockerSuite) TestCpFromErrSrcNotDir(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-err-src-not-dir")
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defer os.RemoveAll(tmpDir)
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err := runDockerCp(c, containerCpPathTrailingSep(containerID, "file1"), tmpDir, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpNotDir(err), checker.True, check.Commentf("expected IsNotDir error, but got %T: %s", err, err))
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}
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// Test for error when DST ends in a trailing
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// path separator but exists as a file.
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func (s *DockerSuite) TestCpFromErrDstNotDir(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-err-dst-not-dir")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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// Try with a file source.
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srcPath := containerCpPath(containerID, "/file1")
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dstPath := cpPathTrailingSep(tmpDir, "file1")
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err := runDockerCp(c, srcPath, dstPath, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpNotDir(err), checker.True, check.Commentf("expected IsNotDir error, but got %T: %s", err, err))
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// Try with a directory source.
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srcPath = containerCpPath(containerID, "/dir1")
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err = runDockerCp(c, srcPath, dstPath, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpNotDir(err), checker.True, check.Commentf("expected IsNotDir error, but got %T: %s", err, err))
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}
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// Check that copying from a container to a local symlink copies to the symlink
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// target and does not overwrite the local symlink itself.
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func (s *DockerSuite) TestCpFromSymlinkDestination(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-err-dst-not-dir")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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// First, copy a file from the container to a symlink to a file. This
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// should overwrite the symlink target contents with the source contents.
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srcPath := containerCpPath(containerID, "/file2")
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dstPath := cpPath(tmpDir, "symlinkToFile1")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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// The symlink should not have been modified.
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c.Assert(symlinkTargetEquals(c, dstPath, "file1"), checker.IsNil)
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// The file should have the contents of "file2" now.
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c.Assert(fileContentEquals(c, cpPath(tmpDir, "file1"), "file2\n"), checker.IsNil)
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// Next, copy a file from the container to a symlink to a directory. This
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// should copy the file into the symlink target directory.
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dstPath = cpPath(tmpDir, "symlinkToDir1")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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// The symlink should not have been modified.
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c.Assert(symlinkTargetEquals(c, dstPath, "dir1"), checker.IsNil)
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// The file should have the contents of "file2" now.
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c.Assert(fileContentEquals(c, cpPath(tmpDir, "file2"), "file2\n"), checker.IsNil)
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// Next, copy a file from the container to a symlink to a file that does
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// not exist (a broken symlink). This should create the target file with
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// the contents of the source file.
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dstPath = cpPath(tmpDir, "brokenSymlinkToFileX")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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// The symlink should not have been modified.
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c.Assert(symlinkTargetEquals(c, dstPath, "fileX"), checker.IsNil)
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// The file should have the contents of "file2" now.
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c.Assert(fileContentEquals(c, cpPath(tmpDir, "fileX"), "file2\n"), checker.IsNil)
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// Next, copy a directory from the container to a symlink to a local
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// directory. This should copy the directory into the symlink target
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// directory and not modify the symlink.
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srcPath = containerCpPath(containerID, "/dir2")
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dstPath = cpPath(tmpDir, "symlinkToDir1")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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// The symlink should not have been modified.
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c.Assert(symlinkTargetEquals(c, dstPath, "dir1"), checker.IsNil)
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// The directory should now contain a copy of "dir2".
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c.Assert(fileContentEquals(c, cpPath(tmpDir, "dir1/dir2/file2-1"), "file2-1\n"), checker.IsNil)
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// Next, copy a directory from the container to a symlink to a local
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// directory that does not exist (a broken symlink). This should create
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// the target as a directory with the contents of the source directory. It
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// should not modify the symlink.
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dstPath = cpPath(tmpDir, "brokenSymlinkToDirX")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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// The symlink should not have been modified.
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c.Assert(symlinkTargetEquals(c, dstPath, "dirX"), checker.IsNil)
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// The "dirX" directory should now be a copy of "dir2".
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c.Assert(fileContentEquals(c, cpPath(tmpDir, "dirX/file2-1"), "file2-1\n"), checker.IsNil)
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}
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// Possibilities are reduced to the remaining 10 cases:
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//
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// case | srcIsDir | onlyDirContents | dstExists | dstIsDir | dstTrSep | action
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// ===================================================================================================
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// A | no | - | no | - | no | create file
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// B | no | - | no | - | yes | error
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// C | no | - | yes | no | - | overwrite file
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// D | no | - | yes | yes | - | create file in dst dir
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// E | yes | no | no | - | - | create dir, copy contents
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// F | yes | no | yes | no | - | error
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// G | yes | no | yes | yes | - | copy dir and contents
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// H | yes | yes | no | - | - | create dir, copy contents
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// I | yes | yes | yes | no | - | error
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// J | yes | yes | yes | yes | - | copy dir contents
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//
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// A. SRC specifies a file and DST (no trailing path separator) doesn't
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// exist. This should create a file with the name DST and copy the
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// contents of the source file into it.
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func (s *DockerSuite) TestCpFromCaseA(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{
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addContent: true, workDir: "/root",
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})
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tmpDir := getTestDir(c, "test-cp-from-case-a")
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defer os.RemoveAll(tmpDir)
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srcPath := containerCpPath(containerID, "/root/file1")
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dstPath := cpPath(tmpDir, "itWorks.txt")
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1\n"), checker.IsNil)
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}
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// B. SRC specifies a file and DST (with trailing path separator) doesn't
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// exist. This should cause an error because the copy operation cannot
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// create a directory when copying a single file.
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func (s *DockerSuite) TestCpFromCaseB(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-case-b")
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defer os.RemoveAll(tmpDir)
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srcPath := containerCpPath(containerID, "/file1")
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dstDir := cpPathTrailingSep(tmpDir, "testDir")
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err := runDockerCp(c, srcPath, dstDir, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpDirNotExist(err), checker.True, check.Commentf("expected DirNotExists error, but got %T: %s", err, err))
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}
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// C. SRC specifies a file and DST exists as a file. This should overwrite
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// the file at DST with the contents of the source file.
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func (s *DockerSuite) TestCpFromCaseC(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{
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addContent: true, workDir: "/root",
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})
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tmpDir := getTestDir(c, "test-cp-from-case-c")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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srcPath := containerCpPath(containerID, "/root/file1")
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dstPath := cpPath(tmpDir, "file2")
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// Ensure the local file starts with different content.
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c.Assert(fileContentEquals(c, dstPath, "file2\n"), checker.IsNil)
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c.Assert(runDockerCp(c, srcPath, dstPath, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1\n"), checker.IsNil)
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}
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// D. SRC specifies a file and DST exists as a directory. This should place
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// a copy of the source file inside it using the basename from SRC. Ensure
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// this works whether DST has a trailing path separator or not.
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func (s *DockerSuite) TestCpFromCaseD(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-case-d")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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srcPath := containerCpPath(containerID, "/file1")
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dstDir := cpPath(tmpDir, "dir1")
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dstPath := filepath.Join(dstDir, "file1")
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// Ensure that dstPath doesn't exist.
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_, err := os.Stat(dstPath)
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c.Assert(os.IsNotExist(err), checker.True, check.Commentf("did not expect dstPath %q to exist", dstPath))
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c.Assert(runDockerCp(c, srcPath, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1\n"), checker.IsNil)
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// Now try again but using a trailing path separator for dstDir.
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// unable to remove dstDir
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c.Assert(os.RemoveAll(dstDir), checker.IsNil)
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// unable to make dstDir
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c.Assert(os.MkdirAll(dstDir, os.FileMode(0755)), checker.IsNil)
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dstDir = cpPathTrailingSep(tmpDir, "dir1")
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c.Assert(runDockerCp(c, srcPath, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1\n"), checker.IsNil)
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}
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// E. SRC specifies a directory and DST does not exist. This should create a
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// directory at DST and copy the contents of the SRC directory into the DST
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// directory. Ensure this works whether DST has a trailing path separator or
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// not.
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func (s *DockerSuite) TestCpFromCaseE(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{addContent: true})
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tmpDir := getTestDir(c, "test-cp-from-case-e")
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defer os.RemoveAll(tmpDir)
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srcDir := containerCpPath(containerID, "dir1")
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dstDir := cpPath(tmpDir, "testDir")
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dstPath := filepath.Join(dstDir, "file1-1")
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c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
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// Now try again but using a trailing path separator for dstDir.
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// unable to remove dstDir
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c.Assert(os.RemoveAll(dstDir), checker.IsNil)
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dstDir = cpPathTrailingSep(tmpDir, "testDir")
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c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
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}
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// F. SRC specifies a directory and DST exists as a file. This should cause an
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// error as it is not possible to overwrite a file with a directory.
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func (s *DockerSuite) TestCpFromCaseF(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{
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addContent: true, workDir: "/root",
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})
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tmpDir := getTestDir(c, "test-cp-from-case-f")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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srcDir := containerCpPath(containerID, "/root/dir1")
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dstFile := cpPath(tmpDir, "file1")
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err := runDockerCp(c, srcDir, dstFile, nil)
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c.Assert(err, checker.NotNil)
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c.Assert(isCpCannotCopyDir(err), checker.True, check.Commentf("expected ErrCannotCopyDir error, but got %T: %s", err, err))
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}
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// G. SRC specifies a directory and DST exists as a directory. This should copy
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// the SRC directory and all its contents to the DST directory. Ensure this
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// works whether DST has a trailing path separator or not.
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func (s *DockerSuite) TestCpFromCaseG(c *check.C) {
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testRequires(c, DaemonIsLinux)
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containerID := makeTestContainer(c, testContainerOptions{
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addContent: true, workDir: "/root",
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})
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tmpDir := getTestDir(c, "test-cp-from-case-g")
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defer os.RemoveAll(tmpDir)
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makeTestContentInDir(c, tmpDir)
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srcDir := containerCpPath(containerID, "/root/dir1")
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dstDir := cpPath(tmpDir, "dir2")
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resultDir := filepath.Join(dstDir, "dir1")
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dstPath := filepath.Join(resultDir, "file1-1")
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c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
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// Now try again but using a trailing path separator for dstDir.
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// unable to remove dstDir
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c.Assert(os.RemoveAll(dstDir), checker.IsNil)
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// unable to make dstDir
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c.Assert(os.MkdirAll(dstDir, os.FileMode(0755)), checker.IsNil)
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dstDir = cpPathTrailingSep(tmpDir, "dir2")
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c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
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c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
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}
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// H. SRC specifies a directory's contents only and DST does not exist. This
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// should create a directory at DST and copy the contents of the SRC
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// directory (but not the directory itself) into the DST directory. Ensure
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// this works whether DST has a trailing path separator or not.
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func (s *DockerSuite) TestCpFromCaseH(c *check.C) {
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||
|
testRequires(c, DaemonIsLinux)
|
||
|
containerID := makeTestContainer(c, testContainerOptions{addContent: true})
|
||
|
|
||
|
tmpDir := getTestDir(c, "test-cp-from-case-h")
|
||
|
defer os.RemoveAll(tmpDir)
|
||
|
|
||
|
srcDir := containerCpPathTrailingSep(containerID, "dir1") + "."
|
||
|
dstDir := cpPath(tmpDir, "testDir")
|
||
|
dstPath := filepath.Join(dstDir, "file1-1")
|
||
|
|
||
|
c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
|
||
|
|
||
|
c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
|
||
|
|
||
|
// Now try again but using a trailing path separator for dstDir.
|
||
|
|
||
|
// unable to remove resultDir
|
||
|
c.Assert(os.RemoveAll(dstDir), checker.IsNil)
|
||
|
|
||
|
dstDir = cpPathTrailingSep(tmpDir, "testDir")
|
||
|
|
||
|
c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
|
||
|
|
||
|
c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
|
||
|
}
|
||
|
|
||
|
// I. SRC specifies a directory's contents only and DST exists as a file. This
|
||
|
// should cause an error as it is not possible to overwrite a file with a
|
||
|
// directory.
|
||
|
func (s *DockerSuite) TestCpFromCaseI(c *check.C) {
|
||
|
testRequires(c, DaemonIsLinux)
|
||
|
containerID := makeTestContainer(c, testContainerOptions{
|
||
|
addContent: true, workDir: "/root",
|
||
|
})
|
||
|
|
||
|
tmpDir := getTestDir(c, "test-cp-from-case-i")
|
||
|
defer os.RemoveAll(tmpDir)
|
||
|
|
||
|
makeTestContentInDir(c, tmpDir)
|
||
|
|
||
|
srcDir := containerCpPathTrailingSep(containerID, "/root/dir1") + "."
|
||
|
dstFile := cpPath(tmpDir, "file1")
|
||
|
|
||
|
err := runDockerCp(c, srcDir, dstFile, nil)
|
||
|
c.Assert(err, checker.NotNil)
|
||
|
|
||
|
c.Assert(isCpCannotCopyDir(err), checker.True, check.Commentf("expected ErrCannotCopyDir error, but got %T: %s", err, err))
|
||
|
}
|
||
|
|
||
|
// J. SRC specifies a directory's contents only and DST exists as a directory.
|
||
|
// This should copy the contents of the SRC directory (but not the directory
|
||
|
// itself) into the DST directory. Ensure this works whether DST has a
|
||
|
// trailing path separator or not.
|
||
|
func (s *DockerSuite) TestCpFromCaseJ(c *check.C) {
|
||
|
testRequires(c, DaemonIsLinux)
|
||
|
containerID := makeTestContainer(c, testContainerOptions{
|
||
|
addContent: true, workDir: "/root",
|
||
|
})
|
||
|
|
||
|
tmpDir := getTestDir(c, "test-cp-from-case-j")
|
||
|
defer os.RemoveAll(tmpDir)
|
||
|
|
||
|
makeTestContentInDir(c, tmpDir)
|
||
|
|
||
|
srcDir := containerCpPathTrailingSep(containerID, "/root/dir1") + "."
|
||
|
dstDir := cpPath(tmpDir, "dir2")
|
||
|
dstPath := filepath.Join(dstDir, "file1-1")
|
||
|
|
||
|
c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
|
||
|
|
||
|
c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
|
||
|
|
||
|
// Now try again but using a trailing path separator for dstDir.
|
||
|
|
||
|
// unable to remove dstDir
|
||
|
c.Assert(os.RemoveAll(dstDir), checker.IsNil)
|
||
|
|
||
|
// unable to make dstDir
|
||
|
c.Assert(os.MkdirAll(dstDir, os.FileMode(0755)), checker.IsNil)
|
||
|
|
||
|
dstDir = cpPathTrailingSep(tmpDir, "dir2")
|
||
|
|
||
|
c.Assert(runDockerCp(c, srcDir, dstDir, nil), checker.IsNil)
|
||
|
|
||
|
c.Assert(fileContentEquals(c, dstPath, "file1-1\n"), checker.IsNil)
|
||
|
}
|