package client import ( "encoding/json" "fmt" "strings" "text/tabwriter" "time" "github.com/docker/docker/api/types" 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/docker/pkg/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{"#notrunc", "-no-trunc"}, false, "Don't truncate output") cmd.Require(flag.Exact, 1) cmd.ParseFlags(args, true) serverResp, err := cli.call("GET", "/images/"+cmd.Arg(0)+"/history", nil, nil) if err != nil { return err } defer serverResp.body.Close() history := []types.ImageHistory{} if err := json.NewDecoder(serverResp.body).Decode(&history); err != nil { return err } w := tabwriter.NewWriter(cli.out, 20, 1, 3, ' ', 0) if !*quiet { fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT") } for _, entry := range history { if *noTrunc { fmt.Fprintf(w, entry.ID) } else { fmt.Fprintf(w, stringid.TruncateID(entry.ID)) } if !*quiet { if *human { fmt.Fprintf(w, "\t%s ago\t", units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0)))) } else { fmt.Fprintf(w, "\t%s\t", time.Unix(entry.Created, 0).Format(time.RFC3339)) } if *noTrunc { fmt.Fprintf(w, "%s\t", strings.Replace(entry.CreatedBy, "\t", " ", -1)) } else { fmt.Fprintf(w, "%s\t", stringutils.Truncate(strings.Replace(entry.CreatedBy, "\t", " ", -1), 45)) } if *human { fmt.Fprintf(w, "%s\t", units.HumanSize(float64(entry.Size))) } else { fmt.Fprintf(w, "%d\t", entry.Size) } fmt.Fprintf(w, "%s", entry.Comment) } fmt.Fprintf(w, "\n") } w.Flush() return nil }