Function runCopy

cli/command/container/cp.go:215–247

(ctx context.Context, dockerCli command.Cli, opts copyOptions)

}

func runCopy(ctx context.Context, dockerCli command.Cli, opts copyOptions) error {
	srcContainer, srcPath := splitCpArg(opts.source)
	destContainer, destPath := splitCpArg(opts.destination)

	copyConfig := cpConfig{
		followLink: opts.followLink,
		copyUIDGID: opts.copyUIDGID,
		quiet:      opts.quiet,
		sourcePath: srcPath,
		destPath:   destPath,
	}

	var direction copyDirection
	if srcContainer != "" {
		direction |= fromContainer
		copyConfig.container = srcContainer
	}
	if destContainer != "" {
		direction |= toContainer
		copyConfig.container = destContainer
	}

	switch direction {
	case fromContainer:
		return copyFromContainer(ctx, dockerCli, copyConfig)
	case toContainer:
		return copyToContainer(ctx, dockerCli, copyConfig)
	case acrossContainers:
		return errors.New("copying between containers is not supported")
	default:
		return errors.New("must specify at least one container source")
	}
}

func resolveLocalPath(localPath string) (absPath string, _ error) {
	absPath, err := filepath.Abs(localPath)