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moby--moby/api/client/image/history.go

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Go
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package image
import (
"fmt"
"strconv"
"strings"
"text/tabwriter"
"time"
"golang.org/x/net/context"
"github.com/docker/docker/api/client"
"github.com/docker/docker/cli"
"github.com/docker/docker/pkg/stringid"
"github.com/docker/docker/pkg/stringutils"
"github.com/docker/go-units"
"github.com/spf13/cobra"
)
type historyOptions struct {
image string
human bool
quiet bool
noTrunc bool
}
// NewHistoryCommand create a new `docker history` command
func NewHistoryCommand(dockerCli *client.DockerCli) *cobra.Command {
var opts historyOptions
cmd := &cobra.Command{
Use: "history [OPTIONS] IMAGE",
Short: "Show the history of an image",
Args: cli.ExactArgs(1),
RunE: func(cmd *cobra.Command, args []string) error {
opts.image = args[0]
return runHistory(dockerCli, opts)
},
}
flags := cmd.Flags()
flags.BoolVarP(&opts.human, "human", "H", true, "Print sizes and dates in human readable format")
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only show numeric IDs")
flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Don't truncate output")
return cmd
}
func runHistory(dockerCli *client.DockerCli, opts historyOptions) error {
ctx := context.Background()
history, err := dockerCli.Client().ImageHistory(ctx, opts.image)
if err != nil {
return err
}
w := tabwriter.NewWriter(dockerCli.Out(), 20, 1, 3, ' ', 0)
if opts.quiet {
for _, entry := range history {
if opts.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 opts.noTrunc == false {
createdBy = stringutils.Truncate(createdBy, 45)
imageID = stringid.TruncateID(entry.ID)
}
if opts.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
}