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package images
import (
"errors"
"fmt"
"os"
"sort"
"strings"
"text/tabwriter"
"text/template"
"time"
"github.com/containers/libpod/cmd/podmanV2/registry"
"github.com/containers/libpod/cmd/podmanV2/report"
"github.com/containers/libpod/pkg/domain/entities"
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 {
type image struct {
entities.ImageSummary
Repository string `json:"repository,omitempty"`
Tag string `json:"tag,omitempty"`
}
imgs := make([]image, 0, len(imageS))
for _, e := range imageS {
for _, tag := range e.RepoTags {
var h image
h.ImageSummary = *e
h.Repository, h.Tag = tokenRepoTag(tag)
imgs = append(imgs, h)
}
if e.IsReadOnly() {
listFlag.readOnly = true
}
}
hdr, row := imageListFormat(listFlag)
format := hdr + "{{range . }}" + row + "{{end}}"
tmpl := template.Must(template.New("list").Funcs(report.PodmanTemplateFuncs()).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 "", "{{slice .ID 0 12}}\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{{slice .ID 0 12}}"
}
hdr += "\tCREATED\tSIZE"
row += "\t{{humanDuration .Created}}\t{{humanSize .Size}}"
if flags.history {
hdr += "\tHISTORY"
row += "\t{{if .History}}{{join .History \", \"}}{{else}}<none>{{end}}"
}
if flags.readOnly {
hdr += "\tReadOnly"
row += "\t{{.ReadOnly}}"
}
if flags.noHeading {
hdr = ""
} else {
hdr += "\n"
}
row += "\n"
return hdr, row
}
|
