1 files changed, 273 insertions, 0 deletions
diff --git a/cmd/podman/images/list.go b/cmd/podman/images/list.go
new file mode 100644
index 000000000..366dfc4ba
--- /dev/null
+++ b/cmd/podman/images/list.go
@@ -0,0 +1,273 @@
+package images
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"sort"
+	"strings"
+	"text/tabwriter"
+	"text/template"
+	"time"
+	"unicode"
+
+	"github.com/containers/libpod/cmd/podman/registry"
+	"github.com/containers/libpod/pkg/domain/entities"
+	"github.com/docker/go-units"
+	jsoniter "github.com/json-iterator/go"
+	"github.com/spf13/cobra"
+	"github.com/spf13/pflag"
+)
+
+type listFlagType struct {
+	format    string
+	history   bool
+	noHeading bool
+	noTrunc   bool
+	quiet     bool
+	sort      string
+	readOnly  bool
+	digests   bool
+}
+
+var (
+	// Command: podman image _list_
+	listCmd = &cobra.Command{
+		Use:     "list [flag] [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,
+		Example: `podman image list --format json
+  podman image list --sort repository --format "table {{.ID}} {{.Repository}} {{.Tag}}"
+  podman image list --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{
+		Mode:    []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
+		Command: listCmd,
+		Parent:  imageCmd,
+	})
+	imageListFlagSet(listCmd.Flags())
+}
+
+func imageListFlagSet(flags *pflag.FlagSet) {
+	flags.BoolVarP(&listOptions.All, "all", "a", false, "Show all images (default hides intermediate images)")
+	flags.StringSliceVarP(&listOptions.Filter, "filter", "f", []string{}, "Filter output based on conditions provided (default [])")
+	flags.StringVar(&listFlag.format, "format", "", "Change the output format to JSON or a Go template")
+	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.BoolVar(&listFlag.noTrunc, "notruncate", false, "Do not truncate output")
+	flags.BoolVarP(&listFlag.quiet, "quiet", "q", false, "Display only image IDs")
+	flags.StringVar(&listFlag.sort, "sort", "created", "Sort by "+sortFields.String())
+	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(listOptions.Filter) < 1 && 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
+	}
+
+	imageS := summaries
+	sort.Slice(imageS, sortFunc(listFlag.sort, imageS))
+
+	if cmd.Flag("format").Changed && listFlag.format == "json" {
+		return writeJSON(imageS)
+	} else {
+		return writeTemplate(imageS, err)
+	}
+}
+
+func writeJSON(imageS []*entities.ImageSummary) error {
+	type image struct {
+		entities.ImageSummary
+		Created string
+	}
+
+	imgs := make([]image, 0, len(imageS))
+	for _, e := range imageS {
+		var h image
+		h.ImageSummary = *e
+		h.Created = time.Unix(e.Created, 0).Format(time.RFC3339)
+		h.RepoTags = nil
+
+		imgs = append(imgs, h)
+	}
+
+	json := jsoniter.ConfigCompatibleWithStandardLibrary
+	enc := json.NewEncoder(os.Stdout)
+	return enc.Encode(imgs)
+}
+
+func writeTemplate(imageS []*entities.ImageSummary, err error) error {
+	var (
+		hdr, row string
+	)
+	imgs := make([]imageReporter, 0, len(imageS))
+	for _, e := range imageS {
+		for _, tag := range e.RepoTags {
+			var h imageReporter
+			h.ImageSummary = *e
+			h.Repository, h.Tag = tokenRepoTag(tag)
+			imgs = append(imgs, h)
+		}
+		if e.IsReadOnly() {
+			listFlag.readOnly = true
+		}
+	}
+	if len(listFlag.format) < 1 {
+		hdr, row = imageListFormat(listFlag)
+	} else {
+		row = listFlag.format
+		if !strings.HasSuffix(row, "\n") {
+			row += "\n"
+		}
+	}
+	format := hdr + "{{range . }}" + row + "{{end}}"
+	tmpl := template.Must(template.New("list").Parse(format))
+	w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
+	defer w.Flush()
+	return tmpl.Execute(w, imgs)
+}
+
+func tokenRepoTag(tag string) (string, string) {
+	tokens := strings.SplitN(tag, ":", 2)
+	switch len(tokens) {
+	case 0:
+		return tag, ""
+	case 1:
+		return tokens[0], ""
+	case 2:
+		return tokens[0], tokens[1]
+	default:
+		return "<N/A>", ""
+	}
+}
+
+func sortFunc(key string, data []*entities.ImageSummary) 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].RepoTags[0] < data[j].RepoTags[0]
+		}
+	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].RepoTags[0] < data[j].RepoTags[0]
+		}
+	default:
+		// case "created":
+		return func(i, j int) bool {
+			return data[i].Created >= data[j].Created
+		}
+	}
+}
+
+func imageListFormat(flags listFlagType) (string, string) {
+	if flags.quiet {
+		return "", "{{.ID}}\n"
+	}
+
+	// Defaults
+	hdr := "REPOSITORY\tTAG"
+	row := "{{.Repository}}\t{{if .Tag}}{{.Tag}}{{else}}<none>{{end}}"
+
+	if flags.digests {
+		hdr += "\tDIGEST"
+		row += "\t{{.Digest}}"
+	}
+
+	hdr += "\tIMAGE ID"
+	if flags.noTrunc {
+		row += "\tsha256:{{.ID}}"
+	} else {
+		row += "\t{{.ID}}"
+	}
+
+	hdr += "\tCREATED\tSIZE"
+	row += "\t{{.Created}}\t{{.Size}}"
+
+	if flags.history {
+		hdr += "\tHISTORY"
+		row += "\t{{if .History}}{{.History}}{{else}}<none>{{end}}"
+	}
+
+	if flags.readOnly {
+		hdr += "\tReadOnly"
+		row += "\t{{.ReadOnly}}"
+	}
+
+	if flags.noHeading {
+		hdr = ""
+	} else {
+		hdr += "\n"
+	}
+
+	row += "\n"
+	return hdr, row
+}
+
+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 i.ImageSummary.ID
+}
+
+func (i imageReporter) Created() string {
+	return units.HumanDuration(time.Since(time.Unix(i.ImageSummary.Created, 0))) + " ago"
+}
+
+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, ", ")
+}