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51dc35cf23
This patch implements an Ellipsis utility to append an ellipsis (...) when truncating strings in output. It also fixes the existing Truncate() utility to be compatible with unicode/multibyte characters. Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
99 lines
2.3 KiB
Go
99 lines
2.3 KiB
Go
package image
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import (
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"fmt"
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"strconv"
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"strings"
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"text/tabwriter"
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"time"
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"golang.org/x/net/context"
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"github.com/docker/docker/api/client"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/pkg/stringid"
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"github.com/docker/docker/pkg/stringutils"
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"github.com/docker/go-units"
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"github.com/spf13/cobra"
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)
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type historyOptions struct {
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image string
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human bool
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quiet bool
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noTrunc bool
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}
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// NewHistoryCommand create a new `docker history` command
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func NewHistoryCommand(dockerCli *client.DockerCli) *cobra.Command {
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var opts historyOptions
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cmd := &cobra.Command{
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Use: "history [OPTIONS] IMAGE",
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Short: "Show the history of an image",
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Args: cli.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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opts.image = args[0]
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return runHistory(dockerCli, opts)
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},
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}
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flags := cmd.Flags()
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flags.BoolVarP(&opts.human, "human", "H", true, "Print sizes and dates in human readable format")
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flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only show numeric IDs")
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flags.BoolVar(&opts.noTrunc, "no-trunc", false, "Don't truncate output")
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return cmd
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}
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func runHistory(dockerCli *client.DockerCli, opts historyOptions) error {
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ctx := context.Background()
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history, err := dockerCli.Client().ImageHistory(ctx, opts.image)
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if err != nil {
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return err
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}
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w := tabwriter.NewWriter(dockerCli.Out(), 20, 1, 3, ' ', 0)
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if opts.quiet {
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for _, entry := range history {
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if opts.noTrunc {
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fmt.Fprintf(w, "%s\n", entry.ID)
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} else {
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fmt.Fprintf(w, "%s\n", stringid.TruncateID(entry.ID))
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}
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}
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w.Flush()
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return nil
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}
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var imageID string
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var createdBy string
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var created string
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var size string
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fmt.Fprintln(w, "IMAGE\tCREATED\tCREATED BY\tSIZE\tCOMMENT")
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for _, entry := range history {
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imageID = entry.ID
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createdBy = strings.Replace(entry.CreatedBy, "\t", " ", -1)
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if !opts.noTrunc {
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createdBy = stringutils.Ellipsis(createdBy, 45)
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imageID = stringid.TruncateID(entry.ID)
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}
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if opts.human {
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created = units.HumanDuration(time.Now().UTC().Sub(time.Unix(entry.Created, 0))) + " ago"
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size = units.HumanSize(float64(entry.Size))
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} else {
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created = time.Unix(entry.Created, 0).Format(time.RFC3339)
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size = strconv.FormatInt(entry.Size, 10)
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}
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fmt.Fprintf(w, "%s\t%s\t%s\t%s\t%s\n", imageID, created, createdBy, size, entry.Comment)
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}
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w.Flush()
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return nil
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}
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