package images import ( "fmt" "os" "sort" "strings" "text/tabwriter" "text/template" "time" "unicode" "github.com/containers/common/pkg/completion" "github.com/containers/common/pkg/report" "github.com/containers/image/v5/docker/reference" "github.com/containers/podman/v3/cmd/podman/common" "github.com/containers/podman/v3/cmd/podman/parse" "github.com/containers/podman/v3/cmd/podman/registry" "github.com/containers/podman/v3/pkg/domain/entities" "github.com/docker/go-units" "github.com/pkg/errors" "github.com/spf13/cobra" ) type listFlagType struct { format string history bool noHeading bool noTrunc bool quiet bool sort string readOnly bool digests bool } var ( imageListCmd = &cobra.Command{ Use: "list [options] [IMAGE]", Aliases: []string{"ls"}, Args: cobra.MaximumNArgs(1), Short: "List images in local storage", Long: "Lists images previously pulled to the system or created on the system.", RunE: images, ValidArgsFunction: common.AutocompleteImages, Example: `podman image list --format json podman image list --sort repository --format "table {{.ID}} {{.Repository}} {{.Tag}}" podman image list --filter dangling=true`, } imagesCmd = &cobra.Command{ Use: "images [options] [IMAGE]", Args: imageListCmd.Args, Short: imageListCmd.Short, Long: imageListCmd.Long, RunE: imageListCmd.RunE, ValidArgsFunction: imageListCmd.ValidArgsFunction, Example: `podman images --format json podman images --sort repository --format "table {{.ID}} {{.Repository}} {{.Tag}}" podman images --filter dangling=true`, } // Options to pull data listOptions = entities.ImageListOptions{} // Options for presenting data listFlag = listFlagType{} sortFields = entities.NewStringSet( "created", "id", "repository", "size", "tag") ) func init() { registry.Commands = append(registry.Commands, registry.CliCommand{ Command: imageListCmd, Parent: imageCmd, }) imageListFlagSet(imageListCmd) registry.Commands = append(registry.Commands, registry.CliCommand{ Command: imagesCmd, }) imageListFlagSet(imagesCmd) } func imageListFlagSet(cmd *cobra.Command) { flags := cmd.Flags() flags.BoolVarP(&listOptions.All, "all", "a", false, "Show all images (default hides intermediate images)") filterFlagName := "filter" flags.StringSliceVarP(&listOptions.Filter, filterFlagName, "f", []string{}, "Filter output based on conditions provided (default [])") _ = cmd.RegisterFlagCompletionFunc(filterFlagName, common.AutocompleteImageFilters) formatFlagName := "format" flags.StringVar(&listFlag.format, formatFlagName, "", "Change the output format to JSON or a Go template") _ = cmd.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteFormat(entities.ImageSummary{})) flags.BoolVar(&listFlag.digests, "digests", false, "Show digests") flags.BoolVarP(&listFlag.noHeading, "noheading", "n", false, "Do not print column headings") flags.BoolVar(&listFlag.noTrunc, "no-trunc", false, "Do not truncate output") flags.BoolVarP(&listFlag.quiet, "quiet", "q", false, "Display only image IDs") sortFlagName := "sort" flags.StringVar(&listFlag.sort, sortFlagName, "created", "Sort by "+sortFields.String()) _ = cmd.RegisterFlagCompletionFunc(sortFlagName, completion.AutocompleteNone) flags.BoolVarP(&listFlag.history, "history", "", false, "Display the image name history") } func images(cmd *cobra.Command, args []string) error { if len(listOptions.Filter) > 0 && len(args) > 0 { return errors.New("cannot specify an image and a filter(s)") } if len(args) > 0 { listOptions.Filter = append(listOptions.Filter, "reference="+args[0]) } if cmd.Flag("sort").Changed && !sortFields.Contains(listFlag.sort) { return fmt.Errorf("\"%s\" is not a valid field for sorting. Choose from: %s", listFlag.sort, sortFields.String()) } summaries, err := registry.ImageEngine().List(registry.GetContext(), listOptions) if err != nil { return err } imgs, err := sortImages(summaries) if err != nil { return err } switch { case report.IsJSON(listFlag.format): return writeJSON(imgs) case listFlag.quiet: return writeID(imgs) default: if cmd.Flags().Changed("format") && !parse.HasTable(listFlag.format) { listFlag.noHeading = true } return writeTemplate(imgs) } } func writeID(imgs []imageReporter) error { lookup := make(map[string]struct{}, len(imgs)) ids := make([]string, 0) for _, e := range imgs { if _, found := lookup[e.ID()]; !found { lookup[e.ID()] = struct{}{} ids = append(ids, e.ID()) } } for _, k := range ids { fmt.Println(k) } return nil } func writeJSON(images []imageReporter) error { type image struct { entities.ImageSummary Created int64 CreatedAt string } imgs := make([]image, 0, len(images)) for _, e := range images { var h image h.ImageSummary = e.ImageSummary h.Created = e.ImageSummary.Created h.CreatedAt = e.created().Format(time.RFC3339Nano) h.RepoTags = nil imgs = append(imgs, h) } prettyJSON, err := json.MarshalIndent(imgs, "", " ") if err != nil { return err } fmt.Println(string(prettyJSON)) return nil } func writeTemplate(imgs []imageReporter) error { hdrs := report.Headers(imageReporter{}, map[string]string{ "ID": "IMAGE ID", "ReadOnly": "R/O", }) var row string if listFlag.format == "" { row = lsFormatFromFlags(listFlag) } else { row = report.NormalizeFormat(listFlag.format) } format := parse.EnforceRange(row) tmpl, err := template.New("list").Parse(format) if err != nil { return err } w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0) defer w.Flush() if !listFlag.noHeading { if err := tmpl.Execute(w, hdrs); err != nil { return err } } return tmpl.Execute(w, imgs) } func sortImages(imageS []*entities.ImageSummary) ([]imageReporter, error) { imgs := make([]imageReporter, 0, len(imageS)) var err error for _, e := range imageS { var h imageReporter if len(e.RepoTags) > 0 { tagged := []imageReporter{} untagged := []imageReporter{} for _, tag := range e.RepoTags { h.ImageSummary = *e h.Repository, h.Tag, err = tokenRepoTag(tag) if err != nil { return nil, errors.Wrapf(err, "error parsing repository tag %q:", tag) } if h.Tag == "" { untagged = append(untagged, h) } else { tagged = append(tagged, h) } } // Note: we only want to display "" if we // couldn't find any tagged name in RepoTags. if len(tagged) > 0 { imgs = append(imgs, tagged...) } else { imgs = append(imgs, untagged[0]) } } else { h.ImageSummary = *e h.Repository = "" h.Tag = "" imgs = append(imgs, h) } listFlag.readOnly = e.IsReadOnly() } sort.Slice(imgs, sortFunc(listFlag.sort, imgs)) return imgs, err } func tokenRepoTag(ref string) (string, string, error) { if ref == ":" { return "", "", nil } repo, err := reference.Parse(ref) if err != nil { return "", "", err } named, ok := repo.(reference.Named) if !ok { return ref, "", nil } name := named.Name() if name == "" { name = "" } tagged, ok := repo.(reference.Tagged) if !ok { return name, "", nil } tag := tagged.Tag() if tag == "" { tag = "" } return name, tag, nil } func sortFunc(key string, data []imageReporter) func(i, j int) bool { switch key { case "id": return func(i, j int) bool { return data[i].ID() < data[j].ID() } case "repository": return func(i, j int) bool { return data[i].Repository < data[j].Repository } case "size": return func(i, j int) bool { return data[i].size() < data[j].size() } case "tag": return func(i, j int) bool { return data[i].Tag < data[j].Tag } default: // case "created": return func(i, j int) bool { return data[i].created().After(data[j].created()) } } } func lsFormatFromFlags(flags listFlagType) string { row := []string{ "{{if .Repository}}{{.Repository}}{{else}}{{end}}", "{{if .Tag}}{{.Tag}}{{else}}{{end}}", } if flags.digests { row = append(row, "{{.Digest}}") } row = append(row, "{{.ID}}", "{{.Created}}", "{{.Size}}") if flags.history { row = append(row, "{{if .History}}{{.History}}{{else}}{{end}}") } if flags.readOnly { row = append(row, "{{.ReadOnly}}") } return strings.Join(row, "\t") + "\n" } type imageReporter struct { Repository string `json:"repository,omitempty"` Tag string `json:"tag,omitempty"` entities.ImageSummary } func (i imageReporter) ID() string { if !listFlag.noTrunc && len(i.ImageSummary.ID) >= 12 { return i.ImageSummary.ID[0:12] } return "sha256:" + i.ImageSummary.ID } func (i imageReporter) Created() string { return units.HumanDuration(time.Since(i.created())) + " ago" } func (i imageReporter) created() time.Time { return time.Unix(i.ImageSummary.Created, 0).UTC() } func (i imageReporter) Size() string { s := units.HumanSizeWithPrecision(float64(i.ImageSummary.Size), 3) j := strings.LastIndexFunc(s, unicode.IsNumber) return s[:j+1] + " " + s[j+1:] } func (i imageReporter) History() string { return strings.Join(i.ImageSummary.History, ", ") } func (i imageReporter) CreatedAt() string { return i.created().String() } func (i imageReporter) CreatedSince() string { return i.Created() } func (i imageReporter) CreatedTime() string { return i.CreatedAt() } func (i imageReporter) size() int64 { return i.ImageSummary.Size }