Golang CopyInfo.Path方法代码示例

func copyToContainer(ctx context.Context, dockerCli *client.DockerCli, srcPath, dstContainer, dstPath string, cpParam *cpConfig) (err error) {
	if srcPath != "-" {
		// Get an absolute source path.
		srcPath, err = resolveLocalPath(srcPath)
		if err != nil {
			return err
		}
	}

	// In order to get the copy behavior right, we need to know information
	// about both the source and destination. The API is a simple tar
	// archive/extract API but we can use the stat info header about the
	// destination to be more informed about exactly what the destination is.

	// Prepare destination copy info by stat-ing the container path.
	dstInfo := archive.CopyInfo{Path: dstPath}
	dstStat, err := statContainerPath(ctx, dockerCli, dstContainer, dstPath)

	// If the destination is a symbolic link, we should evaluate it.
	if err == nil && dstStat.Mode&os.ModeSymlink != 0 {
		linkTarget := dstStat.LinkTarget
		if !system.IsAbs(linkTarget) {
			// Join with the parent directory.
			dstParent, _ := archive.SplitPathDirEntry(dstPath)
			linkTarget = filepath.Join(dstParent, linkTarget)
		}

		dstInfo.Path = linkTarget
		dstStat, err = statContainerPath(ctx, dockerCli, dstContainer, linkTarget)
	}

	// Ignore any error and assume that the parent directory of the destination
	// path exists, in which case the copy may still succeed. If there is any
	// type of conflict (e.g., non-directory overwriting an existing directory
	// or vice versa) the extraction will fail. If the destination simply did
	// not exist, but the parent directory does, the extraction will still
	// succeed.
	if err == nil {
		dstInfo.Exists, dstInfo.IsDir = true, dstStat.Mode.IsDir()
	}

	var (
		content         io.Reader
		resolvedDstPath string
	)

	if srcPath == "-" {
		// Use STDIN.
		content = os.Stdin
		resolvedDstPath = dstInfo.Path
		if !dstInfo.IsDir {
			return fmt.Errorf("destination %q must be a directory", fmt.Sprintf("%s:%s", dstContainer, dstPath))
		}
	} else {
		// Prepare source copy info.
		srcInfo, err := archive.CopyInfoSourcePath(srcPath, cpParam.followLink)
		if err != nil {
			return err
		}

		srcArchive, err := archive.TarResource(srcInfo)
		if err != nil {
			return err
		}
		defer srcArchive.Close()

		// With the stat info about the local source as well as the
		// destination, we have enough information to know whether we need to
		// alter the archive that we upload so that when the server extracts
		// it to the specified directory in the container we get the desired
		// copy behavior.

		// See comments in the implementation of `archive.PrepareArchiveCopy`
		// for exactly what goes into deciding how and whether the source
		// archive needs to be altered for the correct copy behavior when it is
		// extracted. This function also infers from the source and destination
		// info which directory to extract to, which may be the parent of the
		// destination that the user specified.
		dstDir, preparedArchive, err := archive.PrepareArchiveCopy(srcArchive, srcInfo, dstInfo)
		if err != nil {
			return err
		}
		defer preparedArchive.Close()

		resolvedDstPath = dstDir
		content = preparedArchive
	}

	options := types.CopyToContainerOptions{
		AllowOverwriteDirWithFile: false,
	}

	return dockerCli.Client().CopyToContainer(ctx, dstContainer, resolvedDstPath, content, options)
}

func (cli *DockerCli) copyToContainer(srcPath, dstContainer, dstPath string) (err error) {
	if srcPath != "-" {
		// Get an absolute source path.
		srcPath, err = resolveLocalPath(srcPath)
		if err != nil {
			return err
		}
	}

	// In order to get the copy behavior right, we need to know information
	// about both the source and destination. The API is a simple tar
	// archive/extract API but we can use the stat info header about the
	// destination to be more informed about exactly what the destination is.

	// Prepare destination copy info by stat-ing the container path.
	dstInfo := archive.CopyInfo{Path: dstPath}
	dstStat, err := cli.statContainerPath(dstContainer, dstPath)

	// If the destination is a symbolic link, we should evaluate it.
	if err == nil && dstStat.Mode&os.ModeSymlink != 0 {
		linkTarget := dstStat.LinkTarget
		if !system.IsAbs(linkTarget) {
			// Join with the parent directory.
			dstParent, _ := archive.SplitPathDirEntry(dstPath)
			linkTarget = filepath.Join(dstParent, linkTarget)
		}

		dstInfo.Path = linkTarget
		dstStat, err = cli.statContainerPath(dstContainer, linkTarget)
	}

	// Ignore any error and assume that the parent directory of the destination
	// path exists, in which case the copy may still succeed. If there is any
	// type of conflict (e.g., non-directory overwriting an existing directory
	// or vice versia) the extraction will fail. If the destination simply did
	// not exist, but the parent directory does, the extraction will still
	// succeed.
	if err == nil {
		dstInfo.Exists, dstInfo.IsDir = true, dstStat.Mode.IsDir()
	}

	var (
		content         io.Reader
		resolvedDstPath string
	)

	if srcPath == "-" {
		// Use STDIN.
		content = os.Stdin
		resolvedDstPath = dstInfo.Path
		if !dstInfo.IsDir {
			return fmt.Errorf("destination %q must be a directory", fmt.Sprintf("%s:%s", dstContainer, dstPath))
		}
	} else {
		// Prepare source copy info.
		srcInfo, err := archive.CopyInfoSourcePath(srcPath)
		if err != nil {
			return err
		}

		srcArchive, err := archive.TarResource(srcInfo)
		if err != nil {
			return err
		}
		defer srcArchive.Close()

		// With the stat info about the local source as well as the
		// destination, we have enough information to know whether we need to
		// alter the archive that we upload so that when the server extracts
		// it to the specified directory in the container we get the disired
		// copy behavior.

		// See comments in the implementation of `archive.PrepareArchiveCopy`
		// for exactly what goes into deciding how and whether the source
		// archive needs to be altered for the correct copy behavior when it is
		// extracted. This function also infers from the source and destination
		// info which directory to extract to, which may be the parent of the
		// destination that the user specified.
		dstDir, preparedArchive, err := archive.PrepareArchiveCopy(srcArchive, srcInfo, dstInfo)
		if err != nil {
			return err
		}
		defer preparedArchive.Close()

		resolvedDstPath = dstDir
		content = preparedArchive
	}

	query := make(url.Values, 2)
	query.Set("path", filepath.ToSlash(resolvedDstPath)) // Normalize the paths used in the API.
	// Do not allow for an existing directory to be overwritten by a non-directory and vice versa.
	query.Set("noOverwriteDirNonDir", "true")

	urlStr := fmt.Sprintf("/containers/%s/archive?%s", dstContainer, query.Encode())

	response, err := cli.stream("PUT", urlStr, &streamOpts{in: content})
	if err != nil {
		return err
	}
	defer response.body.Close()
//.........这里部分代码省略.........