package container import ( "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" "github.com/docker/docker/cli/command/formatter" "github.com/pkg/errors" "github.com/spf13/cobra" "golang.org/x/net/context" ) type diffOptions struct { container string } // NewDiffCommand creates a new cobra.Command for `docker diff` func NewDiffCommand(dockerCli *command.DockerCli) *cobra.Command { var opts diffOptions return &cobra.Command{ Use: "diff CONTAINER", Short: "Inspect changes to files or directories on a container's filesystem", Args: cli.ExactArgs(1), RunE: func(cmd *cobra.Command, args []string) error { opts.container = args[0] return runDiff(dockerCli, &opts) }, } } func runDiff(dockerCli *command.DockerCli, opts *diffOptions) error { if opts.container == "" { return errors.New("Container name cannot be empty") } ctx := context.Background() changes, err := dockerCli.Client().ContainerDiff(ctx, opts.container) if err != nil { return err } diffCtx := formatter.Context{ Output: dockerCli.Out(), Format: formatter.NewDiffFormat("{{.Type}} {{.Path}}"), } return formatter.DiffWrite(diffCtx, changes) }