Golang archive.CopyWithTar函數代碼示例

func (b *buildFile) addContext(container *Container, orig, dest string) error {
	var (
		origPath = path.Join(b.contextPath, orig)
		destPath = path.Join(container.BasefsPath(), dest)
	)
	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") || dest == "." || dest == ".." {
		destPath = destPath + "/"
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("%s: no such file or directory", orig)
		}
		return err
	}
	if fi.IsDir() {
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		// First try to unpack the source as an archive
	} else if err := archive.UntarPath(origPath, destPath); err != nil {
		utils.Debugf("Couldn't untar %s to %s: %s", origPath, destPath, err)
		// If that fails, just copy it as a regular file
		if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
			return err
		}
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
	}
	return nil
}

func (b *buildFile) addContext(container *Container, orig, dest string) error {
	origPath := path.Join(b.context, orig)
	destPath := path.Join(container.RootfsPath(), dest)
	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") {
		destPath = destPath + "/"
	}
	if !strings.HasPrefix(origPath, b.context) {
		return fmt.Errorf("Forbidden path outside the build context: %s (%s)", orig, origPath)
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		return fmt.Errorf("%s: no such file or directory", orig)
	}
	if fi.IsDir() {
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		// First try to unpack the source as an archive
	} else if err := archive.UntarPath(origPath, destPath); err != nil {
		utils.Debugf("Couldn't untar %s to %s: %s", origPath, destPath, err)
		// If that fails, just copy it as a regular file
		if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
			return err
		}
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
	}
	return nil
}

func (b *buildFile) addContext(container *runtime.Container, orig, dest string, remote bool) error {
	var (
		origPath = path.Join(b.contextPath, orig)
		destPath = path.Join(container.RootfsPath(), dest)
	)
	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") {
		destPath = destPath + "/"
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("%s: no such file or directory", orig)
		}
		return err
	}

	if fi.IsDir() {
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		return nil
	}

	// First try to unpack the source as an archive
	// to support the untar feature we need to clean up the path a little bit
	// because tar is very forgiving.  First we need to strip off the archive's
	// filename from the path but this is only added if it does not end in / .
	tarDest := destPath
	if strings.HasSuffix(tarDest, "/") {
		tarDest = filepath.Dir(destPath)
	}

	// If we are adding a remote file, do not try to untar it
	if !remote {
		// try to successfully untar the orig
		if err := archive.UntarPath(origPath, tarDest); err == nil {
			return nil
		}
		utils.Debugf("Couldn't untar %s to %s: %s", origPath, destPath, err)
	}

	// If that fails, just copy it as a regular file
	// but do not use all the magic path handling for the tar path
	if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
		return err
	}
	if err := archive.CopyWithTar(origPath, destPath); err != nil {
		return err
	}
	return nil
}

func copyAsDirectory(source, destination string, destinationExists bool) error {
	if err := archive.CopyWithTar(source, destination); err != nil {
		return err
	}

	if destinationExists {
		files, err := ioutil.ReadDir(source)
		if err != nil {
			return err
		}

		for _, file := range files {
			if err := fixPermissions(filepath.Join(destination, file.Name()), 0, 0); err != nil {
				return err
			}
		}
		return nil
	}

	return fixPermissions(destination, 0, 0)
}

func copyExistingContents(rootVolPath, srcPath string) error {
	volList, err := ioutil.ReadDir(rootVolPath)
	if err != nil {
		return err
	}

	if len(volList) > 0 {
		srcList, err := ioutil.ReadDir(srcPath)
		if err != nil {
			return err
		}

		if len(srcList) == 0 {
			// If the source volume is empty copy files from the root into the volume
			if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
				return err
			}
		}
	}

	var (
		stat    syscall.Stat_t
		srcStat syscall.Stat_t
	)

	if err := syscall.Stat(rootVolPath, &stat); err != nil {
		return err
	}
	if err := syscall.Stat(srcPath, &srcStat); err != nil {
		return err
	}
	// Change the source volume's ownership if it differs from the root
	// files that were just copied
	if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
		if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
			return err
		}
	}
	return nil
}

func copyExistingContents(source, destination string) error {
	volList, err := ioutil.ReadDir(source)
	if err != nil {
		return err
	}

	if len(volList) > 0 {
		srcList, err := ioutil.ReadDir(destination)
		if err != nil {
			return err
		}

		if len(srcList) == 0 {
			// If the source volume is empty copy files from the root into the volume
			if err := archive.CopyWithTar(source, destination); err != nil {
				return err
			}
		}
	}

	return copyOwnership(source, destination)
}

func (container *Container) createVolumes() error {
	binds, err := container.getBindMap()
	if err != nil {
		return err
	}
	volumesDriver := container.runtime.volumes.driver
	// Create the requested volumes if they don't exist
	for volPath := range container.Config.Volumes {
		volPath = path.Clean(volPath)
		volIsDir := true
		// Skip existing volumes
		if _, exists := container.Volumes[volPath]; exists {
			continue
		}
		var srcPath string
		var isBindMount bool
		srcRW := false
		// If an external bind is defined for this volume, use that as a source
		if bindMap, exists := binds[volPath]; exists {
			isBindMount = true
			srcPath = bindMap.SrcPath
			if strings.ToLower(bindMap.Mode) == "rw" {
				srcRW = true
			}
			if stat, err := os.Stat(bindMap.SrcPath); err != nil {
				return err
			} else {
				volIsDir = stat.IsDir()
			}
			// Otherwise create an directory in $ROOT/volumes/ and use that
		} else {

			// Do not pass a container as the parameter for the volume creation.
			// The graph driver using the container's information ( Image ) to
			// create the parent.
			c, err := container.runtime.volumes.Create(nil, nil, "", "", nil)
			if err != nil {
				return err
			}
			srcPath, err = volumesDriver.Get(c.ID)
			if err != nil {
				return fmt.Errorf("Driver %s failed to get volume rootfs %s: %s", volumesDriver, c.ID, err)
			}
			srcRW = true // RW by default
		}

		if p, err := filepath.EvalSymlinks(srcPath); err != nil {
			return err
		} else {
			srcPath = p
		}

		container.Volumes[volPath] = srcPath
		container.VolumesRW[volPath] = srcRW

		// Create the mountpoint
		volPath = path.Join(container.RootfsPath(), volPath)
		rootVolPath, err := utils.FollowSymlinkInScope(volPath, container.RootfsPath())
		if err != nil {
			return err
		}

		if _, err := os.Stat(rootVolPath); err != nil {
			if os.IsNotExist(err) {
				if volIsDir {
					if err := os.MkdirAll(rootVolPath, 0755); err != nil {
						return err
					}
				} else {
					if err := os.MkdirAll(path.Dir(rootVolPath), 0755); err != nil {
						return err
					}
					if f, err := os.OpenFile(rootVolPath, os.O_CREATE, 0755); err != nil {
						return err
					} else {
						f.Close()
					}
				}
			}
		}

		// Do not copy or change permissions if we are mounting from the host
		if srcRW && !isBindMount {
			volList, err := ioutil.ReadDir(rootVolPath)
			if err != nil {
				return err
			}
			if len(volList) > 0 {
				srcList, err := ioutil.ReadDir(srcPath)
				if err != nil {
					return err
				}
				if len(srcList) == 0 {
					// If the source volume is empty copy files from the root into the volume
					if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
						return err
					}

					var stat syscall.Stat_t
					if err := syscall.Stat(rootVolPath, &stat); err != nil {
//.........這裏部分代碼省略.........

//.........這裏部分代碼省略.........
			// Otherwise create an directory in $ROOT/volumes/ and use that
		} else {
			c, err := container.runtime.volumes.Create(nil, container, "", "", nil)
			if err != nil {
				return err
			}
			srcPath, err = c.layer()
			if err != nil {
				return err
			}
			srcRW = true // RW by default
		}
		container.Volumes[volPath] = srcPath
		container.VolumesRW[volPath] = srcRW
		// Create the mountpoint
		rootVolPath := path.Join(container.RootfsPath(), volPath)
		if err := os.MkdirAll(rootVolPath, 0755); err != nil {
			return err
		}

		// Do not copy or change permissions if we are mounting from the host
		if srcRW && !isBindMount {
			volList, err := ioutil.ReadDir(rootVolPath)
			if err != nil {
				return err
			}
			if len(volList) > 0 {
				srcList, err := ioutil.ReadDir(srcPath)
				if err != nil {
					return err
				}
				if len(srcList) == 0 {
					// If the source volume is empty copy files from the root into the volume
					if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
						return err
					}

					var stat syscall.Stat_t
					if err := syscall.Stat(rootVolPath, &stat); err != nil {
						return err
					}
					var srcStat syscall.Stat_t
					if err := syscall.Stat(srcPath, &srcStat); err != nil {
						return err
					}
					// Change the source volume's ownership if it differs from the root
					// files that where just copied
					if stat.Uid != srcStat.Uid || stat.Gid != srcStat.Gid {
						if err := os.Chown(srcPath, int(stat.Uid), int(stat.Gid)); err != nil {
							return err
						}
					}
				}
			}
		}
	}

	if err := container.generateLXCConfig(); err != nil {
		return err
	}

	var lxcStart string = "lxc-start"
	if container.hostConfig.Privileged && container.runtime.capabilities.AppArmor {
		lxcStart = path.Join(container.runtime.config.Root, "lxc-start-unconfined")
	}

func (b *buildFile) addContext(container *daemon.Container, orig, dest string, remote bool) error {
	var (
		err        error
		destExists = true
		origPath   = path.Join(b.contextPath, orig)
		destPath   = path.Join(container.RootfsPath(), dest)
	)

	if destPath != container.RootfsPath() {
		destPath, err = symlink.FollowSymlinkInScope(destPath, container.RootfsPath())
		if err != nil {
			return err
		}
	}

	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") {
		destPath = destPath + "/"
	}
	destStat, err := os.Stat(destPath)
	if err != nil {
		if os.IsNotExist(err) {
			destExists = false
		} else {
			return err
		}
	}
	fi, err := os.Stat(origPath)
	if err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("%s: no such file or directory", orig)
		}
		return err
	}

	fixPermsR := func(destPath string, uid, gid int) error {
		return filepath.Walk(destPath, func(path string, info os.FileInfo, err error) error {
			if err := os.Lchown(path, uid, gid); err != nil && !os.IsNotExist(err) {
				return err
			}
			return nil
		})
	}

	if fi.IsDir() {
		if err := archive.CopyWithTar(origPath, destPath); err != nil {
			return err
		}
		if destExists {
			files, err := ioutil.ReadDir(origPath)
			if err != nil {
				return err
			}
			for _, file := range files {
				if err := fixPermsR(filepath.Join(destPath, file.Name()), 0, 0); err != nil {
					return err
				}
			}
		} else {
			if err := fixPermsR(destPath, 0, 0); err != nil {
				return err
			}
		}
		return nil
	}

	// First try to unpack the source as an archive
	// to support the untar feature we need to clean up the path a little bit
	// because tar is very forgiving.  First we need to strip off the archive's
	// filename from the path but this is only added if it does not end in / .
	tarDest := destPath
	if strings.HasSuffix(tarDest, "/") {
		tarDest = filepath.Dir(destPath)
	}

	// If we are adding a remote file, do not try to untar it
	if !remote {
		// try to successfully untar the orig
		if err := archive.UntarPath(origPath, tarDest); err == nil {
			return nil
		}
		utils.Debugf("Couldn't untar %s to %s: %s", origPath, destPath, err)
	}

	// If that fails, just copy it as a regular file
	// but do not use all the magic path handling for the tar path
	if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
		return err
	}
	if err := archive.CopyWithTar(origPath, destPath); err != nil {
		return err
	}

	resPath := destPath
	if destExists && destStat.IsDir() {
		resPath = path.Join(destPath, path.Base(origPath))
	}

	if err := fixPermsR(resPath, 0, 0); err != nil {
		return err
//.........這裏部分代碼省略.........

func (b *buildFile) addContext(container *daemon.Container, orig, dest string, decompress bool) error {
	var (
		err        error
		destExists = true
		origPath   = path.Join(b.contextPath, orig)
		destPath   = path.Join(container.RootfsPath(), dest)
	)

	if destPath != container.RootfsPath() {
		destPath, err = symlink.FollowSymlinkInScope(destPath, container.RootfsPath())
		if err != nil {
			return err
		}
	}

	// Preserve the trailing '/'
	if strings.HasSuffix(dest, "/") || dest == "." {
		destPath = destPath + "/"
	}

	destStat, err := os.Stat(destPath)
	if err != nil {
		if !os.IsNotExist(err) {
			return err
		}
		destExists = false
	}

	fi, err := os.Stat(origPath)
	if err != nil {
		if os.IsNotExist(err) {
			return fmt.Errorf("%s: no such file or directory", orig)
		}
		return err
	}

	if fi.IsDir() {
		return copyAsDirectory(origPath, destPath, destExists)
	}

	// If we are adding a remote file (or we've been told not to decompress), do not try to untar it
	if decompress {
		// First try to unpack the source as an archive
		// to support the untar feature we need to clean up the path a little bit
		// because tar is very forgiving.  First we need to strip off the archive's
		// filename from the path but this is only added if it does not end in / .
		tarDest := destPath
		if strings.HasSuffix(tarDest, "/") {
			tarDest = filepath.Dir(destPath)
		}

		// try to successfully untar the orig
		if err := archive.UntarPath(origPath, tarDest); err == nil {
			return nil
		} else if err != io.EOF {
			utils.Debugf("Couldn't untar %s to %s: %s", origPath, tarDest, err)
		}
	}

	if err := os.MkdirAll(path.Dir(destPath), 0755); err != nil {
		return err
	}
	if err := archive.CopyWithTar(origPath, destPath); err != nil {
		return err
	}

	resPath := destPath
	if destExists && destStat.IsDir() {
		resPath = path.Join(destPath, path.Base(origPath))
	}

	return fixPermissions(resPath, 0, 0)
}

func createVolumes(container *Container) error {
	binds, err := getBindMap(container)
	if err != nil {
		return err
	}

	volumesDriver := container.daemon.volumes.Driver()
	// Create the requested volumes if they don't exist
	for volPath := range container.Config.Volumes {
		volPath = filepath.Clean(volPath)
		volIsDir := true
		// Skip existing volumes
		if _, exists := container.Volumes[volPath]; exists {
			continue
		}
		var srcPath string
		var isBindMount bool
		srcRW := false
		// If an external bind is defined for this volume, use that as a source
		if bindMap, exists := binds[volPath]; exists {
			isBindMount = true
			srcPath = bindMap.SrcPath
			if !filepath.IsAbs(srcPath) {
				return fmt.Errorf("%s must be an absolute path", srcPath)
			}
			if strings.ToLower(bindMap.Mode) == "rw" {
				srcRW = true
			}
			if stat, err := os.Stat(bindMap.SrcPath); err != nil {
				return err
			} else {
				volIsDir = stat.IsDir()
			}
			// Otherwise create an directory in $ROOT/volumes/ and use that
		} else {

			// Do not pass a container as the parameter for the volume creation.
			// The graph driver using the container's information ( Image ) to
			// create the parent.
			c, err := container.daemon.volumes.Create(nil, "", "", "", "", nil, nil)
			if err != nil {
				return err
			}
			srcPath, err = volumesDriver.Get(c.ID, "")
			if err != nil {
				return fmt.Errorf("Driver %s failed to get volume rootfs %s: %s", volumesDriver, c.ID, err)
			}
			srcRW = true // RW by default
		}

		if p, err := filepath.EvalSymlinks(srcPath); err != nil {
			return err
		} else {
			srcPath = p
		}

		// Create the mountpoint
		rootVolPath, err := symlink.FollowSymlinkInScope(filepath.Join(container.basefs, volPath), container.basefs)
		if err != nil {
			return err
		}

		newVolPath, err := filepath.Rel(container.basefs, rootVolPath)
		if err != nil {
			return err
		}
		newVolPath = "/" + newVolPath

		if volPath != newVolPath {
			delete(container.Volumes, volPath)
			delete(container.VolumesRW, volPath)
		}

		container.Volumes[newVolPath] = srcPath
		container.VolumesRW[newVolPath] = srcRW

		if err := createIfNotExists(rootVolPath, volIsDir); err != nil {
			return err
		}

		// Do not copy or change permissions if we are mounting from the host
		if srcRW && !isBindMount {
			volList, err := ioutil.ReadDir(rootVolPath)
			if err != nil {
				return err
			}
			if len(volList) > 0 {
				srcList, err := ioutil.ReadDir(srcPath)
				if err != nil {
					return err
				}
				if len(srcList) == 0 {
					// If the source volume is empty copy files from the root into the volume
					if err := archive.CopyWithTar(rootVolPath, srcPath); err != nil {
						return err
					}
				}
			}

			var stat syscall.Stat_t
//.........這裏部分代碼省略.........