package client import ( "fmt" "strconv" "strings" "text/tabwriter" "time" "golang.org/x/net/context" Cli "github.com/docker/docker/cli" flag "github.com/docker/docker/pkg/mflag" "github.com/docker/docker/pkg/stringid" "github.com/docker/docker/pkg/stringutils" "github.com/docker/go-units" ) // CmdHistory shows the history of an image. // // Usage: docker history [OPTIONS] IMAGE func (cli *DockerCli) CmdHistory(args ...string) error { cmd := Cli.Subcmd("history", []string{"IMAGE"}, Cli.DockerCommands["history"].Description, true) human := cmd.Bool([]string{"H", "-human"}, true, "Print sizes and dates in human readable format") quiet := cmd.Bool([]string{"q", "-quiet"}, false, "Only show numeric IDs") noTrunc := cmd.Bool([]string{"-no-trunc"}, false, "Don't truncate output") cmd.Require(flag.Exact, 1) cmd.ParseFlags(args, true) history, err := cli.client.ImageHistory(context.Background(), cmd.Arg(0)) if err != nil { return err } w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0) if *quiet { for _, entry := range history { if *noTrunc { fmt.Fprintf(w, "%s\n", entry.ID) } else { fmt.Fprintf(w, "%s\n", stringid.TruncateID(entry.ID)) } } w.Flush() return nil } var imageID string var createdBy string var created string var size string fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT") for _, entry := range history { imageID = entry.ID createdBy = strings.Replace(entry.CreatedBy, "\t", " ", -1) if *noTrunc == false { createdBy = stringutils.Truncate(createdBy, 45) imageID = stringid.TruncateID(entry.ID) } if *human { created = units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))) + " ago" size = units.HumanSize(float64(entry.Size)) } else { created = time.Unix(entry.Created, 0).Format(time.RFC3339) size = strconv.FormatInt(entry.Size, 10) } fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", imageID, created, createdBy, size, entry.Comment) } w.Flush() return nil }