Switch to go mod

vendor/github.com/fsouza/go-dockerclient/internal/archive/archive.go

@@ -0,0 +1,505 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+import (
+	"archive/tar"
+	"bufio"
+	"compress/gzip"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/docker/docker/pkg/fileutils"
+	"github.com/docker/docker/pkg/idtools"
+	"github.com/docker/docker/pkg/pools"
+	"github.com/docker/docker/pkg/system"
+	"github.com/sirupsen/logrus"
+)
+
+const (
+	// Uncompressed represents the uncompressed.
+	Uncompressed Compression = iota
+	// Bzip2 is bzip2 compression algorithm.
+	Bzip2
+	// Gzip is gzip compression algorithm.
+	Gzip
+	// Xz is xz compression algorithm.
+	Xz
+)
+
+const (
+	modeISDIR  = 040000  // Directory
+	modeISFIFO = 010000  // FIFO
+	modeISREG  = 0100000 // Regular file
+	modeISLNK  = 0120000 // Symbolic link
+	modeISBLK  = 060000  // Block special file
+	modeISCHR  = 020000  // Character special file
+	modeISSOCK = 0140000 // Socket
+)
+
+// Compression is the state represents if compressed or not.
+type Compression int
+
+// Extension returns the extension of a file that uses the specified compression algorithm.
+func (compression *Compression) Extension() string {
+	switch *compression {
+	case Uncompressed:
+		return "tar"
+	case Bzip2:
+		return "tar.bz2"
+	case Gzip:
+		return "tar.gz"
+	case Xz:
+		return "tar.xz"
+	}
+	return ""
+}
+
+// WhiteoutFormat is the format of whiteouts unpacked
+type WhiteoutFormat int
+
+// TarOptions wraps the tar options.
+type TarOptions struct {
+	IncludeFiles     []string
+	ExcludePatterns  []string
+	Compression      Compression
+	NoLchown         bool
+	UIDMaps          []idtools.IDMap
+	GIDMaps          []idtools.IDMap
+	ChownOpts        *idtools.Identity
+	IncludeSourceDir bool
+	// WhiteoutFormat is the expected on disk format for whiteout files.
+	// This format will be converted to the standard format on pack
+	// and from the standard format on unpack.
+	WhiteoutFormat WhiteoutFormat
+	// When unpacking, specifies whether overwriting a directory with a
+	// non-directory is allowed and vice versa.
+	NoOverwriteDirNonDir bool
+	// For each include when creating an archive, the included name will be
+	// replaced with the matching name from this map.
+	RebaseNames map[string]string
+	InUserNS    bool
+}
+
+// TarWithOptions creates an archive from the directory at `path`, only including files whose relative
+// paths are included in `options.IncludeFiles` (if non-nil) or not in `options.ExcludePatterns`.
+func TarWithOptions(srcPath string, options *TarOptions) (io.ReadCloser, error) {
+
+	// Fix the source path to work with long path names. This is a no-op
+	// on platforms other than Windows.
+	srcPath = fixVolumePathPrefix(srcPath)
+
+	pm, err := fileutils.NewPatternMatcher(options.ExcludePatterns)
+	if err != nil {
+		return nil, err
+	}
+
+	pipeReader, pipeWriter := io.Pipe()
+
+	compressWriter, err := CompressStream(pipeWriter, options.Compression)
+	if err != nil {
+		return nil, err
+	}
+
+	go func() {
+		ta := newTarAppender(
+			idtools.NewIDMappingsFromMaps(options.UIDMaps, options.GIDMaps),
+			compressWriter,
+			options.ChownOpts,
+		)
+		ta.WhiteoutConverter = getWhiteoutConverter(options.WhiteoutFormat)
+
+		defer func() {
+			// Make sure to check the error on Close.
+			if err := ta.TarWriter.Close(); err != nil {
+				logrus.Errorf("Can't close tar writer: %s", err)
+			}
+			if err := compressWriter.Close(); err != nil {
+				logrus.Errorf("Can't close compress writer: %s", err)
+			}
+			if err := pipeWriter.Close(); err != nil {
+				logrus.Errorf("Can't close pipe writer: %s", err)
+			}
+		}()
+
+		// this buffer is needed for the duration of this piped stream
+		defer pools.BufioWriter32KPool.Put(ta.Buffer)
+
+		// In general we log errors here but ignore them because
+		// during e.g. a diff operation the container can continue
+		// mutating the filesystem and we can see transient errors
+		// from this
+
+		stat, err := os.Lstat(srcPath)
+		if err != nil {
+			return
+		}
+
+		if !stat.IsDir() {
+			// We can't later join a non-dir with any includes because the
+			// 'walk' will error if "file/." is stat-ed and "file" is not a
+			// directory. So, we must split the source path and use the
+			// basename as the include.
+			if len(options.IncludeFiles) > 0 {
+				logrus.Warn("Tar: Can't archive a file with includes")
+			}
+
+			dir, base := SplitPathDirEntry(srcPath)
+			srcPath = dir
+			options.IncludeFiles = []string{base}
+		}
+
+		if len(options.IncludeFiles) == 0 {
+			options.IncludeFiles = []string{"."}
+		}
+
+		seen := make(map[string]bool)
+
+		for _, include := range options.IncludeFiles {
+			rebaseName := options.RebaseNames[include]
+
+			walkRoot := getWalkRoot(srcPath, include)
+			filepath.Walk(walkRoot, func(filePath string, f os.FileInfo, err error) error {
+				if err != nil {
+					logrus.Errorf("Tar: Can't stat file %s to tar: %s", srcPath, err)
+					return nil
+				}
+
+				relFilePath, err := filepath.Rel(srcPath, filePath)
+				if err != nil || (!options.IncludeSourceDir && relFilePath == "." && f.IsDir()) {
+					// Error getting relative path OR we are looking
+					// at the source directory path. Skip in both situations.
+					return nil
+				}
+
+				if options.IncludeSourceDir && include == "." && relFilePath != "." {
+					relFilePath = strings.Join([]string{".", relFilePath}, string(filepath.Separator))
+				}
+
+				skip := false
+
+				// If "include" is an exact match for the current file
+				// then even if there's an "excludePatterns" pattern that
+				// matches it, don't skip it. IOW, assume an explicit 'include'
+				// is asking for that file no matter what - which is true
+				// for some files, like .dockerignore and Dockerfile (sometimes)
+				if include != relFilePath {
+					skip, err = pm.Matches(relFilePath)
+					if err != nil {
+						logrus.Errorf("Error matching %s: %v", relFilePath, err)
+						return err
+					}
+				}
+
+				if skip {
+					// If we want to skip this file and its a directory
+					// then we should first check to see if there's an
+					// excludes pattern (e.g. !dir/file) that starts with this
+					// dir. If so then we can't skip this dir.
+
+					// Its not a dir then so we can just return/skip.
+					if !f.IsDir() {
+						return nil
+					}
+
+					// No exceptions (!...) in patterns so just skip dir
+					if !pm.Exclusions() {
+						return filepath.SkipDir
+					}
+
+					dirSlash := relFilePath + string(filepath.Separator)
+
+					for _, pat := range pm.Patterns() {
+						if !pat.Exclusion() {
+							continue
+						}
+						if strings.HasPrefix(pat.String()+string(filepath.Separator), dirSlash) {
+							// found a match - so can't skip this dir
+							return nil
+						}
+					}
+
+					// No matching exclusion dir so just skip dir
+					return filepath.SkipDir
+				}
+
+				if seen[relFilePath] {
+					return nil
+				}
+				seen[relFilePath] = true
+
+				// Rename the base resource.
+				if rebaseName != "" {
+					var replacement string
+					if rebaseName != string(filepath.Separator) {
+						// Special case the root directory to replace with an
+						// empty string instead so that we don't end up with
+						// double slashes in the paths.
+						replacement = rebaseName
+					}
+
+					relFilePath = strings.Replace(relFilePath, include, replacement, 1)
+				}
+
+				if err := ta.addTarFile(filePath, relFilePath); err != nil {
+					logrus.Errorf("Can't add file %s to tar: %s", filePath, err)
+					// if pipe is broken, stop writing tar stream to it
+					if err == io.ErrClosedPipe {
+						return err
+					}
+				}
+				return nil
+			})
+		}
+	}()
+
+	return pipeReader, nil
+}
+
+// CompressStream compresses the dest with specified compression algorithm.
+func CompressStream(dest io.Writer, compression Compression) (io.WriteCloser, error) {
+	p := pools.BufioWriter32KPool
+	buf := p.Get(dest)
+	switch compression {
+	case Uncompressed:
+		writeBufWrapper := p.NewWriteCloserWrapper(buf, buf)
+		return writeBufWrapper, nil
+	case Gzip:
+		gzWriter := gzip.NewWriter(dest)
+		writeBufWrapper := p.NewWriteCloserWrapper(buf, gzWriter)
+		return writeBufWrapper, nil
+	case Bzip2, Xz:
+		// archive/bzip2 does not support writing, and there is no xz support at all
+		// However, this is not a problem as docker only currently generates gzipped tars
+		return nil, fmt.Errorf("Unsupported compression format %s", (&compression).Extension())
+	default:
+		return nil, fmt.Errorf("Unsupported compression format %s", (&compression).Extension())
+	}
+}
+
+type tarWhiteoutConverter interface {
+	ConvertWrite(*tar.Header, string, os.FileInfo) (*tar.Header, error)
+	ConvertRead(*tar.Header, string) (bool, error)
+}
+
+type tarAppender struct {
+	TarWriter *tar.Writer
+	Buffer    *bufio.Writer
+
+	// for hardlink mapping
+	SeenFiles       map[uint64]string
+	IdentityMapping *idtools.IdentityMapping
+	ChownOpts       *idtools.Identity
+
+	// For packing and unpacking whiteout files in the
+	// non standard format. The whiteout files defined
+	// by the AUFS standard are used as the tar whiteout
+	// standard.
+	WhiteoutConverter tarWhiteoutConverter
+}
+
+func newTarAppender(idMapping *idtools.IdentityMapping, writer io.Writer, chownOpts *idtools.Identity) *tarAppender {
+	return &tarAppender{
+		SeenFiles:       make(map[uint64]string),
+		TarWriter:       tar.NewWriter(writer),
+		Buffer:          pools.BufioWriter32KPool.Get(nil),
+		IdentityMapping: idMapping,
+		ChownOpts:       chownOpts,
+	}
+}
+
+// addTarFile adds to the tar archive a file from `path` as `name`
+func (ta *tarAppender) addTarFile(path, name string) error {
+	fi, err := os.Lstat(path)
+	if err != nil {
+		return err
+	}
+
+	var link string
+	if fi.Mode()&os.ModeSymlink != 0 {
+		var err error
+		link, err = os.Readlink(path)
+		if err != nil {
+			return err
+		}
+	}
+
+	hdr, err := FileInfoHeader(name, fi, link)
+	if err != nil {
+		return err
+	}
+	if err := ReadSecurityXattrToTarHeader(path, hdr); err != nil {
+		return err
+	}
+
+	// if it's not a directory and has more than 1 link,
+	// it's hard linked, so set the type flag accordingly
+	if !fi.IsDir() && hasHardlinks(fi) {
+		inode, err := getInodeFromStat(fi.Sys())
+		if err != nil {
+			return err
+		}
+		// a link should have a name that it links too
+		// and that linked name should be first in the tar archive
+		if oldpath, ok := ta.SeenFiles[inode]; ok {
+			hdr.Typeflag = tar.TypeLink
+			hdr.Linkname = oldpath
+			hdr.Size = 0 // This Must be here for the writer math to add up!
+		} else {
+			ta.SeenFiles[inode] = name
+		}
+	}
+
+	//check whether the file is overlayfs whiteout
+	//if yes, skip re-mapping container ID mappings.
+	isOverlayWhiteout := fi.Mode()&os.ModeCharDevice != 0 && hdr.Devmajor == 0 && hdr.Devminor == 0
+
+	//handle re-mapping container ID mappings back to host ID mappings before
+	//writing tar headers/files. We skip whiteout files because they were written
+	//by the kernel and already have proper ownership relative to the host
+	if !isOverlayWhiteout &&
+		!strings.HasPrefix(filepath.Base(hdr.Name), WhiteoutPrefix) &&
+		!ta.IdentityMapping.Empty() {
+		fileIdentity, err := getFileIdentity(fi.Sys())
+		if err != nil {
+			return err
+		}
+		hdr.Uid, hdr.Gid, err = ta.IdentityMapping.ToContainer(fileIdentity)
+		if err != nil {
+			return err
+		}
+	}
+
+	// explicitly override with ChownOpts
+	if ta.ChownOpts != nil {
+		hdr.Uid = ta.ChownOpts.UID
+		hdr.Gid = ta.ChownOpts.GID
+	}
+
+	if ta.WhiteoutConverter != nil {
+		wo, err := ta.WhiteoutConverter.ConvertWrite(hdr, path, fi)
+		if err != nil {
+			return err
+		}
+
+		// If a new whiteout file exists, write original hdr, then
+		// replace hdr with wo to be written after. Whiteouts should
+		// always be written after the original. Note the original
+		// hdr may have been updated to be a whiteout with returning
+		// a whiteout header
+		if wo != nil {
+			if err := ta.TarWriter.WriteHeader(hdr); err != nil {
+				return err
+			}
+			if hdr.Typeflag == tar.TypeReg && hdr.Size > 0 {
+				return fmt.Errorf("tar: cannot use whiteout for non-empty file")
+			}
+			hdr = wo
+		}
+	}
+
+	if err := ta.TarWriter.WriteHeader(hdr); err != nil {
+		return err
+	}
+
+	if hdr.Typeflag == tar.TypeReg && hdr.Size > 0 {
+		// We use system.OpenSequential to ensure we use sequential file
+		// access on Windows to avoid depleting the standby list.
+		// On Linux, this equates to a regular os.Open.
+		file, err := system.OpenSequential(path)
+		if err != nil {
+			return err
+		}
+
+		ta.Buffer.Reset(ta.TarWriter)
+		defer ta.Buffer.Reset(nil)
+		_, err = io.Copy(ta.Buffer, file)
+		file.Close()
+		if err != nil {
+			return err
+		}
+		err = ta.Buffer.Flush()
+		if err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// ReadSecurityXattrToTarHeader reads security.capability xattr from filesystem
+// to a tar header
+func ReadSecurityXattrToTarHeader(path string, hdr *tar.Header) error {
+	capability, _ := system.Lgetxattr(path, "security.capability")
+	if capability != nil {
+		hdr.Xattrs = make(map[string]string)
+		hdr.Xattrs["security.capability"] = string(capability)
+	}
+	return nil
+}
+
+// FileInfoHeader creates a populated Header from fi.
+// Compared to archive pkg this function fills in more information.
+// Also, regardless of Go version, this function fills file type bits (e.g. hdr.Mode |= modeISDIR),
+// which have been deleted since Go 1.9 archive/tar.
+func FileInfoHeader(name string, fi os.FileInfo, link string) (*tar.Header, error) {
+	hdr, err := tar.FileInfoHeader(fi, link)
+	if err != nil {
+		return nil, err
+	}
+	hdr.Mode = fillGo18FileTypeBits(int64(chmodTarEntry(os.FileMode(hdr.Mode))), fi)
+	name, err = canonicalTarName(name, fi.IsDir())
+	if err != nil {
+		return nil, fmt.Errorf("tar: cannot canonicalize path: %v", err)
+	}
+	hdr.Name = name
+	if err := setHeaderForSpecialDevice(hdr, name, fi.Sys()); err != nil {
+		return nil, err
+	}
+	return hdr, nil
+}
+
+// fillGo18FileTypeBits fills type bits which have been removed on Go 1.9 archive/tar
+// https://github.com/golang/go/commit/66b5a2f
+func fillGo18FileTypeBits(mode int64, fi os.FileInfo) int64 {
+	fm := fi.Mode()
+	switch {
+	case fm.IsRegular():
+		mode |= modeISREG
+	case fi.IsDir():
+		mode |= modeISDIR
+	case fm&os.ModeSymlink != 0:
+		mode |= modeISLNK
+	case fm&os.ModeDevice != 0:
+		if fm&os.ModeCharDevice != 0 {
+			mode |= modeISCHR
+		} else {
+			mode |= modeISBLK
+		}
+	case fm&os.ModeNamedPipe != 0:
+		mode |= modeISFIFO
+	case fm&os.ModeSocket != 0:
+		mode |= modeISSOCK
+	}
+	return mode
+}
+
+// canonicalTarName provides a platform-independent and consistent posix-style
+//path for files and directories to be archived regardless of the platform.
+func canonicalTarName(name string, isDir bool) (string, error) {
+	name, err := CanonicalTarNameForPath(name)
+	if err != nil {
+		return "", err
+	}
+
+	// suffix with '/' for directories
+	if isDir && !strings.HasSuffix(name, "/") {
+		name += "/"
+	}
+	return name, nil
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/archive_linux.go

@@ -0,0 +1,104 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+import (
+	"archive/tar"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/docker/docker/pkg/system"
+	"golang.org/x/sys/unix"
+)
+
+const (
+	// AUFSWhiteoutFormat is the default format for whiteouts
+	AUFSWhiteoutFormat WhiteoutFormat = iota
+	// OverlayWhiteoutFormat formats whiteout according to the overlay
+	// standard.
+	OverlayWhiteoutFormat
+)
+
+func getWhiteoutConverter(format WhiteoutFormat) tarWhiteoutConverter {
+	if format == OverlayWhiteoutFormat {
+		return overlayWhiteoutConverter{}
+	}
+	return nil
+}
+
+type overlayWhiteoutConverter struct{}
+
+func (overlayWhiteoutConverter) ConvertWrite(hdr *tar.Header, path string, fi os.FileInfo) (wo *tar.Header, err error) {
+	// convert whiteouts to AUFS format
+	if fi.Mode()&os.ModeCharDevice != 0 && hdr.Devmajor == 0 && hdr.Devminor == 0 {
+		// we just rename the file and make it normal
+		dir, filename := filepath.Split(hdr.Name)
+		hdr.Name = filepath.Join(dir, WhiteoutPrefix+filename)
+		hdr.Mode = 0600
+		hdr.Typeflag = tar.TypeReg
+		hdr.Size = 0
+	}
+
+	if fi.Mode()&os.ModeDir != 0 {
+		// convert opaque dirs to AUFS format by writing an empty file with the prefix
+		opaque, err := system.Lgetxattr(path, "trusted.overlay.opaque")
+		if err != nil {
+			return nil, err
+		}
+		if len(opaque) == 1 && opaque[0] == 'y' {
+			if hdr.Xattrs != nil {
+				delete(hdr.Xattrs, "trusted.overlay.opaque")
+			}
+
+			// create a header for the whiteout file
+			// it should inherit some properties from the parent, but be a regular file
+			wo = &tar.Header{
+				Typeflag:   tar.TypeReg,
+				Mode:       hdr.Mode & int64(os.ModePerm),
+				Name:       filepath.Join(hdr.Name, WhiteoutOpaqueDir),
+				Size:       0,
+				Uid:        hdr.Uid,
+				Uname:      hdr.Uname,
+				Gid:        hdr.Gid,
+				Gname:      hdr.Gname,
+				AccessTime: hdr.AccessTime,
+				ChangeTime: hdr.ChangeTime,
+			}
+		}
+	}
+
+	return
+}
+
+func (overlayWhiteoutConverter) ConvertRead(hdr *tar.Header, path string) (bool, error) {
+	base := filepath.Base(path)
+	dir := filepath.Dir(path)
+
+	// if a directory is marked as opaque by the AUFS special file, we need to translate that to overlay
+	if base == WhiteoutOpaqueDir {
+		err := unix.Setxattr(dir, "trusted.overlay.opaque", []byte{'y'}, 0)
+		// don't write the file itself
+		return false, err
+	}
+
+	// if a file was deleted and we are using overlay, we need to create a character device
+	if strings.HasPrefix(base, WhiteoutPrefix) {
+		originalBase := base[len(WhiteoutPrefix):]
+		originalPath := filepath.Join(dir, originalBase)
+
+		if err := unix.Mknod(originalPath, unix.S_IFCHR, 0); err != nil {
+			return false, err
+		}
+		if err := os.Chown(originalPath, hdr.Uid, hdr.Gid); err != nil {
+			return false, err
+		}
+
+		// don't write the file itself
+		return false, nil
+	}
+
+	return true, nil
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/archive_other.go

@@ -0,0 +1,11 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+// +build !linux
+
+package archive
+
+func getWhiteoutConverter(format WhiteoutFormat) tarWhiteoutConverter {
+	return nil
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/archive_unix.go

@@ -0,0 +1,77 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+// +build !windows
+
+package archive
+
+import (
+	"archive/tar"
+	"errors"
+	"os"
+	"path/filepath"
+	"syscall"
+
+	"github.com/docker/docker/pkg/idtools"
+	"golang.org/x/sys/unix"
+)
+
+// CanonicalTarNameForPath returns platform-specific filepath
+// to canonical posix-style path for tar archival. p is relative
+// path.
+func CanonicalTarNameForPath(p string) (string, error) {
+	return p, nil // already unix-style
+}
+
+// fixVolumePathPrefix does platform specific processing to ensure that if
+// the path being passed in is not in a volume path format, convert it to one.
+func fixVolumePathPrefix(srcPath string) string {
+	return srcPath
+}
+
+// getWalkRoot calculates the root path when performing a TarWithOptions.
+// We use a separate function as this is platform specific. On Linux, we
+// can't use filepath.Join(srcPath,include) because this will clean away
+// a trailing "." or "/" which may be important.
+func getWalkRoot(srcPath string, include string) string {
+	return srcPath + string(filepath.Separator) + include
+}
+
+func getInodeFromStat(stat interface{}) (inode uint64, err error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if ok {
+		inode = uint64(s.Ino)
+	}
+
+	return
+}
+
+func getFileIdentity(stat interface{}) (idtools.Identity, error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if !ok {
+		return idtools.Identity{}, errors.New("cannot convert stat value to syscall.Stat_t")
+	}
+	return idtools.Identity{UID: int(s.Uid), GID: int(s.Gid)}, nil
+}
+
+func chmodTarEntry(perm os.FileMode) os.FileMode {
+	return perm // noop for unix as golang APIs provide perm bits correctly
+}
+
+func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
+	s, ok := stat.(*syscall.Stat_t)
+
+	if ok {
+		// Currently go does not fill in the major/minors
+		if s.Mode&unix.S_IFBLK != 0 ||
+			s.Mode&unix.S_IFCHR != 0 {
+			hdr.Devmajor = int64(unix.Major(uint64(s.Rdev))) // nolint: unconvert
+			hdr.Devminor = int64(unix.Minor(uint64(s.Rdev))) // nolint: unconvert
+		}
+	}
+
+	return
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/archive_windows.go

@@ -0,0 +1,71 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+import (
+	"archive/tar"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/docker/docker/pkg/idtools"
+	"github.com/docker/docker/pkg/longpath"
+)
+
+// CanonicalTarNameForPath returns platform-specific filepath
+// to canonical posix-style path for tar archival. p is relative
+// path.
+func CanonicalTarNameForPath(p string) (string, error) {
+	// windows: convert windows style relative path with backslashes
+	// into forward slashes. Since windows does not allow '/' or '\'
+	// in file names, it is mostly safe to replace however we must
+	// check just in case
+	if strings.Contains(p, "/") {
+		return "", fmt.Errorf("Windows path contains forward slash: %s", p)
+	}
+	return strings.Replace(p, string(os.PathSeparator), "/", -1), nil
+
+}
+
+// fixVolumePathPrefix does platform specific processing to ensure that if
+// the path being passed in is not in a volume path format, convert it to one.
+func fixVolumePathPrefix(srcPath string) string {
+	return longpath.AddPrefix(srcPath)
+}
+
+// getWalkRoot calculates the root path when performing a TarWithOptions.
+// We use a separate function as this is platform specific.
+func getWalkRoot(srcPath string, include string) string {
+	return filepath.Join(srcPath, include)
+}
+
+func getInodeFromStat(stat interface{}) (inode uint64, err error) {
+	// do nothing. no notion of Inode in stat on Windows
+	return
+}
+
+func getFileIdentity(stat interface{}) (idtools.Identity, error) {
+	// no notion of file ownership mapping yet on Windows
+	return idtools.Identity{}, nil
+}
+
+// chmodTarEntry is used to adjust the file permissions used in tar header based
+// on the platform the archival is done.
+func chmodTarEntry(perm os.FileMode) os.FileMode {
+	//perm &= 0755 // this 0-ed out tar flags (like link, regular file, directory marker etc.)
+	permPart := perm & os.ModePerm
+	noPermPart := perm &^ os.ModePerm
+	// Add the x bit: make everything +x from windows
+	permPart |= 0111
+	permPart &= 0755
+
+	return noPermPart | permPart
+}
+
+func setHeaderForSpecialDevice(hdr *tar.Header, name string, stat interface{}) (err error) {
+	// do nothing. no notion of Rdev, Nlink in stat on Windows
+	return
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/changes_unix.go

@@ -0,0 +1,16 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+// +build !windows
+
+package archive
+
+import (
+	"os"
+	"syscall"
+)
+
+func hasHardlinks(fi os.FileInfo) bool {
+	return fi.Sys().(*syscall.Stat_t).Nlink > 1
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/changes_windows.go

@@ -0,0 +1,11 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+import "os"
+
+func hasHardlinks(fi os.FileInfo) bool {
+	return false
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/copy.go

@@ -0,0 +1,29 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// SplitPathDirEntry splits the given path between its directory name and its
+// basename by first cleaning the path but preserves a trailing "." if the
+// original path specified the current directory.
+func SplitPathDirEntry(path string) (dir, base string) {
+	cleanedPath := filepath.Clean(filepath.FromSlash(path))
+
+	if specifiesCurrentDir(path) {
+		cleanedPath += string(os.PathSeparator) + "."
+	}
+
+	return filepath.Dir(cleanedPath), filepath.Base(cleanedPath)
+}
+
+// specifiesCurrentDir returns whether the given path specifies
+// a "current directory", i.e., the last path segment is `.`.
+func specifiesCurrentDir(path string) bool {
+	return filepath.Base(path) == "."
+}

vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go

@@ -0,0 +1,27 @@
+// Copyright 2014 Docker authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the DOCKER-LICENSE file.
+
+package archive
+
+// Whiteouts are files with a special meaning for the layered filesystem.
+// Docker uses AUFS whiteout files inside exported archives. In other
+// filesystems these files are generated/handled on tar creation/extraction.
+
+// WhiteoutPrefix prefix means file is a whiteout. If this is followed by a
+// filename this means that file has been removed from the base layer.
+const WhiteoutPrefix = ".wh."
+
+// WhiteoutMetaPrefix prefix means whiteout has a special meaning and is not
+// for removing an actual file. Normally these files are excluded from exported
+// archives.
+const WhiteoutMetaPrefix = WhiteoutPrefix + WhiteoutPrefix
+
+// WhiteoutLinkDir is a directory AUFS uses for storing hardlink links to other
+// layers. Normally these should not go into exported archives and all changed
+// hardlinks should be copied to the top layer.
+const WhiteoutLinkDir = WhiteoutMetaPrefix + "plnk"
+
+// WhiteoutOpaqueDir file means directory has been made opaque - meaning
+// readdir calls to this directory do not follow to lower layers.
+const WhiteoutOpaqueDir = WhiteoutMetaPrefix + ".opq"