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history.go
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history.go
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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
}