summaryrefslogtreecommitdiff
path: root/cmd/podman/images/list.go
blob: 7a9a8a804c012923a4e2076e582e371f4ba2effb (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
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 (
	// Command: podman image _list_
	listCmd = &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`,
		DisableFlagsInUseLine: 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)
}

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.AutocompleteJSONFormat)

	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 == "<none>" {
					untagged = append(untagged, h)
				} else {
					tagged = append(tagged, h)
				}
			}
			// Note: we only want to display "<none>" 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 = "<none>"
			h.Tag = "<none>"
			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 == "<none>:<none>" {
		return "<none>", "<none>", nil
	}

	repo, err := reference.Parse(ref)
	if err != nil {
		return "<none>", "<none>", err
	}

	named, ok := repo.(reference.Named)
	if !ok {
		return ref, "<none>", nil
	}
	name := named.Name()
	if name == "" {
		name = "<none>"
	}

	tagged, ok := repo.(reference.Tagged)
	if !ok {
		return name, "<none>", nil
	}
	tag := tagged.Tag()
	if tag == "" {
		tag = "<none>"
	}

	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}}<none>{{end}}",
		"{{if .Tag}}{{.Tag}}{{else}}<none>{{end}}",
	}

	if flags.digests {
		row = append(row, "{{.Digest}}")
	}

	row = append(row, "{{.ID}}", "{{.Created}}", "{{.Size}}")

	if flags.history {
		row = append(row, "{{if .History}}{{.History}}{{else}}<none>{{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
}