package container import ( "fmt" "golang.org/x/net/context" "github.com/docker/docker/api/client" "github.com/docker/docker/cli" "github.com/docker/docker/pkg/archive" "github.com/spf13/cobra" ) type diffOptions struct { container string } // NewDiffCommand creates a new cobra.Command for `docker diff` func NewDiffCommand(dockerCli *client.DockerCli) *cobra.Command { var opts diffOptions cmd := &cobra.Command{ Use: "diff CONTAINER", Short: "Inspect changes 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) }, } cmd.SetFlagErrorFunc(flagErrorFunc) return cmd } func runDiff(dockerCli *client.DockerCli, opts *diffOptions) error { if opts.container == "" { return fmt.Errorf("Container name cannot be empty") } ctx := context.Background() changes, err := dockerCli.Client().ContainerDiff(ctx, opts.container) if err != nil { return err } for _, change := range changes { var kind string switch change.Kind { case archive.ChangeModify: kind = "C" case archive.ChangeAdd: kind = "A" case archive.ChangeDelete: kind = "D" } fmt.Fprintf(dockerCli.Out(), "%s %s\n", kind, change.Path) } return nil }