Windows: Consistent build workdir handling
Signed-off-by: John Howard <jhoward@microsoft.com>
This commit is contained in:
John Howard
parent
ab6b82b856
commit
0433801093
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@ -264,12 +264,37 @@ func workdir(b *Builder, args []string, attributes map[string]bool, original str
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// This is from the Dockerfile and will not necessarily be in platform
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// specific semantics, hence ensure it is converted.
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workdir := filepath.FromSlash(args[0])
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if !system.IsAbs(workdir) {
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current := filepath.FromSlash(b.runConfig.WorkingDir)
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workdir = filepath.Join(string(os.PathSeparator), current, workdir)
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current := filepath.FromSlash(b.runConfig.WorkingDir)
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if runtime.GOOS == "windows" {
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// Windows is a little more complicated than Linux. This code ensures
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// we end up with a workdir which is consistent in terms of platform
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// semantics. This means C:\somefolder, specifically in the format:
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// UPPERCASEDriveLetter-Colon-Backslash-FolderName. We are already
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// guaranteed that `current`, if set, is consistent. This allows us to
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// cope correctly with any of the following in a Dockerfile:
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// WORKDIR a --> C:\a
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// WORKDIR c:\\foo --> C:\foo
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// WORKDIR \\foo --> C:\foo
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// WORKDIR /foo --> C:\foo
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// WORKDIR c:\\foo \ WORKDIR bar --> C:\foo --> C:\foo\bar
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// WORKDIR C:/foo \ WORKDIR bar --> C:\foo --> C:\foo\bar
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// WORKDIR C:/foo \ WORKDIR \\bar --> C:\foo --> C:\bar
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// WORKDIR /foo \ WORKDIR c:/bar --> C:\foo --> C:\bar
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if len(current) == 0 || system.IsAbs(workdir) {
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if (workdir[0] == os.PathSeparator) ||
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(len(workdir) > 1 && string(workdir[1]) != ":") ||
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(len(workdir) == 1) {
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workdir = filepath.Join(`C:\`, workdir)
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}
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} else {
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workdir = filepath.Join(current, workdir)
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}
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workdir = strings.ToUpper(string(workdir[0])) + workdir[1:] // Upper-case drive letter
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} else {
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if !filepath.IsAbs(workdir) {
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workdir = filepath.Join(string(os.PathSeparator), current, workdir)
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}
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}
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b.runConfig.WorkingDir = workdir
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return b.commit("", b.runConfig.Cmd, fmt.Sprintf("WORKDIR %v", workdir))
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@ -213,13 +213,59 @@ func (b *Builder) runContextCommand(args []string, allowRemote bool, allowLocalD
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// Twiddle the destination when its a relative path - meaning, make it
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// relative to the WORKINGDIR
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if !system.IsAbs(dest) {
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hasSlash := strings.HasSuffix(dest, string(os.PathSeparator))
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dest = filepath.Join(string(os.PathSeparator), filepath.FromSlash(b.runConfig.WorkingDir), dest)
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// Make sure we preserve any trailing slash
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if hasSlash {
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dest += string(os.PathSeparator)
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endsInSlash := strings.HasSuffix(dest, string(os.PathSeparator))
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if runtime.GOOS == "windows" {
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// On Windows, this is more complicated. We are guaranteed that the
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// WorkingDir is already platform consistent meaning in the format
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// UPPERCASEDriveLetter-Colon-Backslash-Foldername. However, Windows
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// for now also has the limitation that ADD/COPY can only be done to
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// the C: (system) drive, not any drives that might be present as a
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// result of bind mounts.
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//
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// So... if the path specified is Linux-style absolute (/foo or \\foo),
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// we assume it is the system drive. If it is a Windows-style absolute
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// (DRIVE:\\foo), error if DRIVE is not C. And finally, ensure we
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// strip any configured working directories drive letter so that it
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// can be subsequently legitimately converted to a Windows volume-style
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// pathname.
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// Not a typo - filepath.IsAbs, not system.IsAbs on this next check as
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// we only want to validate where the DriveColon part has been supplied.
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if filepath.IsAbs(dest) {
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if strings.ToUpper(string(dest[0])) != "C" {
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return fmt.Errorf("Windows does not support %s with a destinations not on the system drive (C:)", cmdName)
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}
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dest = dest[2:] // Strip the drive letter
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}
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// Cannot handle relative where WorkingDir is not the system drive.
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if len(b.runConfig.WorkingDir) > 0 {
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if !system.IsAbs(b.runConfig.WorkingDir[2:]) {
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return fmt.Errorf("Current WorkingDir %s is not platform consistent", b.runConfig.WorkingDir)
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}
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if !system.IsAbs(dest) {
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if string(b.runConfig.WorkingDir[0]) != "C" {
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return fmt.Errorf("Windows does not support %s with relative paths when WORKDIR is not the system drive", cmdName)
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}
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dest = filepath.Join(string(os.PathSeparator), b.runConfig.WorkingDir[2:], dest)
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// Make sure we preserve any trailing slash
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if endsInSlash {
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dest += string(os.PathSeparator)
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}
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}
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}
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} else {
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if !system.IsAbs(dest) {
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dest = filepath.Join(string(os.PathSeparator), filepath.FromSlash(b.runConfig.WorkingDir), dest)
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// Make sure we preserve any trailing slash
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if endsInSlash {
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dest += string(os.PathSeparator)
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}
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}
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}
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@ -250,6 +250,13 @@ func (container *Container) GetResourcePath(path string) (string, error) {
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cleanPath := cleanResourcePath(path)
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r, e := symlink.FollowSymlinkInScope(filepath.Join(container.BaseFS, cleanPath), container.BaseFS)
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// Log this here on the daemon side as there's otherwise no indication apart
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// from the error being propagated all the way back to the client. This makes
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// debugging significantly easier and clearly indicates the error comes from the daemon.
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if e != nil {
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logrus.Errorf("Failed to FollowSymlinkInScope BaseFS %s cleanPath %s path %s %s\n", container.BaseFS, cleanPath, path, e)
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}
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return r, e
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}
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@ -2074,22 +2074,13 @@ func (s *DockerSuite) TestBuildRelativeWorkdir(c *check.C) {
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expected4 string
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expectedFinal string
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)
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// TODO Windows: The expectedFinal needs fixing to match Windows
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// filepath semantics. However, this is a non-trivial change. @jhowardmsft
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// Short story - need to make the configuration file platform semantically
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// consistent, so even if `WORKDIR /test2/test3` is specified in a Dockerfile,
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// the configuration should be stored as C:\test2\test3. Something similar to
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// if runtime.GOOS == "windows" && len(workdir) > 2 && string(workdir[0]) == `\` {
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// workdir = "C:" + workdir
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// }
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// in builder\dockerfile\dispatchers.go, function workdir(), but also
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// ironing out all other cases where this causes other failures.
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if daemonPlatform == "windows" {
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expected1 = `C:/`
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expected2 = `C:/test1`
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expected3 = `C:/test2`
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expected4 = `C:/test2/test3`
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expectedFinal = `\test2\test3`
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expectedFinal = `C:\test2\test3` // Note inspect is going to return Windows paths, as it's not in busybox
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} else {
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expected1 = `/`
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expected2 = `/test1`
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@ -2117,12 +2108,238 @@ func (s *DockerSuite) TestBuildRelativeWorkdir(c *check.C) {
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}
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}
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// #22181 Regression test. Validates combinations of supported
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// WORKDIR dockerfile directives in Windows and non-Windows semantics.
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func (s *DockerSuite) TestBuildWindowsWorkdirProcessing(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowsworkdirprocessing"
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_, err := buildImage(name,
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`FROM busybox
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WORKDIR a
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RUN sh -c "[ "$PWD" = "C:/a" ]"
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WORKDIR c:\\foo
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RUN sh -c "[ "$PWD" = "C:/foo" ]"
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WORKDIR \\foo
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RUN sh -c "[ "$PWD" = "C:/foo" ]"
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WORKDIR /foo
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RUN sh -c "[ "$PWD" = "C:/foo" ]"
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WORKDIR C:/foo
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WORKDIR bar
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RUN sh -c "[ "$PWD" = "C:/foo/bar" ]"
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WORKDIR c:/foo
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WORKDIR bar
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RUN sh -c "[ "$PWD" = "C:/foo/bar" ]"
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WORKDIR c:/foo
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WORKDIR \\bar
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RUN sh -c "[ "$PWD" = "C:/bar" ]"
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WORKDIR /foo
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WORKDIR c:\\bar
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RUN sh -c "[ "$PWD" = "C:/bar" ]"
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`,
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true)
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if err != nil {
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c.Fatal(err)
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}
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}
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// #22181 Regression test. Validates combinations of supported
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// COPY dockerfile directives in Windows and non-Windows semantics.
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func (s *DockerSuite) TestBuildWindowsAddCopyPathProcessing(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowsaddcopypathprocessing"
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// TODO Windows (@jhowardmsft). Needs a follow-up PR to 22181 to
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// support backslash such as .\\ being equivalent to ./ and c:\\ being
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// equivalent to c:/. This is not currently (nor ever has been) supported
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// by docker on the Windows platform.
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dockerfile := `
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FROM busybox
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# First cases with no workdir, all end up in the root directory of the system drive
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COPY a1 ./
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ADD a2 ./
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RUN sh -c "[ $(cat c:/a1) = 'helloa1' ]"
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RUN sh -c "[ $(cat c:/a2) = 'worlda2' ]"
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COPY b1 /
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ADD b2 /
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RUN sh -c "[ $(cat c:/b1) = 'hellob1' ]"
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RUN sh -c "[ $(cat c:/b2) = 'worldb2' ]"
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COPY c1 c:/
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ADD c2 c:/
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RUN sh -c "[ $(cat c:/c1) = 'helloc1' ]"
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RUN sh -c "[ $(cat c:/c2) = 'worldc2' ]"
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COPY d1 c:/
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ADD d2 c:/
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RUN sh -c "[ $(cat c:/d1) = 'hellod1' ]"
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RUN sh -c "[ $(cat c:/d2) = 'worldd2' ]"
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COPY e1 .
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ADD e2 .
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RUN sh -c "[ $(cat c:/e1) = 'helloe1' ]"
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RUN sh -c "[ $(cat c:/e2) = 'worlde2' ]"
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# Now with a workdir
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WORKDIR c:\\wa12
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COPY wa1 ./
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ADD wa2 ./
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RUN sh -c "[ $(cat c:/wa12/wa1) = 'hellowa1' ]"
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RUN sh -c "[ $(cat c:/wa12/wa2) = 'worldwa2' ]"
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# No trailing slash on COPY/ADD, Linux-style path.
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# Results in dir being changed to a file
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WORKDIR /wb1
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COPY wb1 .
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WORKDIR /wb2
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ADD wb2 .
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WORKDIR c:/
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RUN sh -c "[ $(cat c:/wb1) = 'hellowb1' ]"
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RUN sh -c "[ $(cat c:/wb2) = 'worldwb2' ]"
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# No trailing slash on COPY/ADD, Windows-style path.
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# Results in dir being changed to a file
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WORKDIR /wc1
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COPY wc1 c:/wc1
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WORKDIR /wc2
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ADD wc2 c:/wc2
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WORKDIR c:/
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RUN sh -c "[ $(cat c:/wc1) = 'hellowc1' ]"
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RUN sh -c "[ $(cat c:/wc2) = 'worldwc2' ]"
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# Trailing slash on COPY/ADD, Windows-style path.
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WORKDIR /wd1
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COPY wd1 c:/wd1/
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WORKDIR /wd2
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ADD wd2 c:/wd2/
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RUN sh -c "[ $(cat c:/wd1/wd1) = 'hellowd1' ]"
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RUN sh -c "[ $(cat c:/wd2/wd2) = 'worldwd2' ]"
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`
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ctx, err := fakeContext(dockerfile, map[string]string{
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"a1": "helloa1",
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"a2": "worlda2",
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"b1": "hellob1",
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"b2": "worldb2",
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"c1": "helloc1",
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"c2": "worldc2",
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"d1": "hellod1",
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"d2": "worldd2",
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"e1": "helloe1",
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"e2": "worlde2",
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"wa1": "hellowa1",
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"wa2": "worldwa2",
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"wb1": "hellowb1",
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"wb2": "worldwb2",
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"wc1": "hellowc1",
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"wc2": "worldwc2",
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"wd1": "hellowd1",
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"wd2": "worldwd2",
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})
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if err != nil {
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c.Fatal(err)
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}
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defer ctx.Close()
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_, err = buildImageFromContext(name, ctx, false)
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if err != nil {
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c.Fatal(err)
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}
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}
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// #22181 Regression test.
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func (s *DockerSuite) TestBuildWindowsCopyFailsNonSystemDrive(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowscopyfailsnonsystemdrive"
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dockerfile := `
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FROM busybox
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cOpY foo d:/
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`
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ctx, err := fakeContext(dockerfile, map[string]string{"foo": "hello"})
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if err != nil {
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c.Fatal(err)
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}
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defer ctx.Close()
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_, err = buildImageFromContext(name, ctx, false)
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if err == nil {
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c.Fatal(err)
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}
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if !strings.Contains(err.Error(), "Windows does not support COPY with a destinations not on the system drive (C:)") {
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c.Fatal(err)
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}
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}
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// #22181 Regression test.
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func (s *DockerSuite) TestBuildWindowsCopyFailsWorkdirNonSystemDrive(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowscopyfailsworkdirsystemdrive"
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dockerfile := `
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FROM busybox
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WORKDIR d:/
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cOpY foo .
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`
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ctx, err := fakeContext(dockerfile, map[string]string{"foo": "hello"})
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if err != nil {
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c.Fatal(err)
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}
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defer ctx.Close()
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_, err = buildImageFromContext(name, ctx, false)
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if err == nil {
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c.Fatal(err)
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}
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if !strings.Contains(err.Error(), "Windows does not support COPY with relative paths when WORKDIR is not the system drive") {
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c.Fatal(err)
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}
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}
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// #22181 Regression test.
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func (s *DockerSuite) TestBuildWindowsAddFailsNonSystemDrive(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowsaddfailsnonsystemdrive"
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dockerfile := `
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FROM busybox
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AdD foo d:/
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`
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ctx, err := fakeContext(dockerfile, map[string]string{"foo": "hello"})
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if err != nil {
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c.Fatal(err)
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}
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defer ctx.Close()
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_, err = buildImageFromContext(name, ctx, false)
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if err == nil {
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c.Fatal(err)
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}
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if !strings.Contains(err.Error(), "Windows does not support ADD with a destinations not on the system drive (C:)") {
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c.Fatal(err)
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}
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}
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// #22181 Regression test.
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func (s *DockerSuite) TestBuildWindowsAddFailsWorkdirNonSystemDrive(c *check.C) {
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testRequires(c, DaemonIsWindows)
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name := "testbuildwindowsaddfailsworkdirsystemdrive"
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dockerfile := `
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FROM busybox
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WORKDIR d:/
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AdD foo .
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`
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ctx, err := fakeContext(dockerfile, map[string]string{"foo": "hello"})
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if err != nil {
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c.Fatal(err)
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}
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defer ctx.Close()
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_, err = buildImageFromContext(name, ctx, false)
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if err == nil {
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c.Fatal(err)
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}
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if !strings.Contains(err.Error(), "Windows does not support ADD with relative paths when WORKDIR is not the system drive") {
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c.Fatal(err)
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}
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}
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func (s *DockerSuite) TestBuildWorkdirWithEnvVariables(c *check.C) {
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name := "testbuildworkdirwithenvvariables"
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var expected string
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if daemonPlatform == "windows" {
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expected = `\test1\test2`
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expected = `C:\test1\test2`
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} else {
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expected = `/test1/test2`
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}
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