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moby--moby/daemon/images.go

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package daemon
import (
"fmt"
"path"
"sort"
"github.com/docker/docker/image"
"github.com/docker/docker/layer"
"github.com/docker/docker/reference"
"github.com/docker/engine-api/types"
"github.com/docker/engine-api/types/filters"
)
var acceptedImageFilterTags = map[string]bool{
"dangling": true,
"label": true,
"before": true,
"since": true,
}
// byCreated is a temporary type used to sort a list of images by creation
// time.
type byCreated []*types.Image
func (r byCreated) Len() int { return len(r) }
func (r byCreated) Swap(i, j int) { r[i], r[j] = r[j], r[i] }
func (r byCreated) Less(i, j int) bool { return r[i].Created < r[j].Created }
// Map returns a map of all images in the ImageStore
func (daemon *Daemon) Map() map[image.ID]*image.Image {
return daemon.imageStore.Map()
}
// Images returns a filtered list of images. filterArgs is a JSON-encoded set
// of filter arguments which will be interpreted by api/types/filters.
// filter is a shell glob string applied to repository names. The argument
// named all controls whether all images in the graph are filtered, or just
// the heads.
func (daemon *Daemon) Images(filterArgs, filter string, all bool) ([]*types.Image, error) {
var (
allImages map[image.ID]*image.Image
err error
danglingOnly = false
)
imageFilters, err := filters.FromParam(filterArgs)
if err != nil {
return nil, err
}
if err := imageFilters.Validate(acceptedImageFilterTags); err != nil {
return nil, err
}
if imageFilters.Include("dangling") {
if imageFilters.ExactMatch("dangling", "true") {
danglingOnly = true
} else if !imageFilters.ExactMatch("dangling", "false") {
return nil, fmt.Errorf("Invalid filter 'dangling=%s'", imageFilters.Get("dangling"))
}
}
if danglingOnly {
allImages = daemon.imageStore.Heads()
} else {
allImages = daemon.imageStore.Map()
}
var beforeFilter, sinceFilter *image.Image
err = imageFilters.WalkValues("before", func(value string) error {
beforeFilter, err = daemon.GetImage(value)
return err
})
if err != nil {
return nil, err
}
err = imageFilters.WalkValues("since", func(value string) error {
sinceFilter, err = daemon.GetImage(value)
return err
})
if err != nil {
return nil, err
}
images := []*types.Image{}
var filterTagged bool
if filter != "" {
filterRef, err := reference.ParseNamed(filter)
if err == nil { // parse error means wildcard repo
if _, ok := filterRef.(reference.NamedTagged); ok {
filterTagged = true
}
}
}
for id, img := range allImages {
if beforeFilter != nil {
if img.Created.Equal(beforeFilter.Created) || img.Created.After(beforeFilter.Created) {
continue
}
}
if sinceFilter != nil {
if img.Created.Equal(sinceFilter.Created) || img.Created.Before(sinceFilter.Created) {
continue
}
}
if imageFilters.Include("label") {
// Very old image that do not have image.Config (or even labels)
if img.Config == nil {
continue
}
// We are now sure image.Config is not nil
if !imageFilters.MatchKVList("label", img.Config.Labels) {
continue
}
}
layerID := img.RootFS.ChainID()
var size int64
if layerID != "" {
l, err := daemon.layerStore.Get(layerID)
if err != nil {
return nil, err
}
size, err = l.Size()
layer.ReleaseAndLog(daemon.layerStore, l)
if err != nil {
return nil, err
}
}
newImage := newImage(img, size)
for _, ref := range daemon.referenceStore.References(id) {
if filter != "" { // filter by tag/repo name
if filterTagged { // filter by tag, require full ref match
if ref.String() != filter {
continue
}
} else if matched, err := path.Match(filter, ref.Name()); !matched || err != nil { // name only match, FIXME: docs say exact
continue
}
}
if _, ok := ref.(reference.Canonical); ok {
newImage.RepoDigests = append(newImage.RepoDigests, ref.String())
}
if _, ok := ref.(reference.NamedTagged); ok {
newImage.RepoTags = append(newImage.RepoTags, ref.String())
}
}
if newImage.RepoDigests == nil && newImage.RepoTags == nil {
if all || len(daemon.imageStore.Children(id)) == 0 {
if imageFilters.Include("dangling") && !danglingOnly {
//dangling=false case, so dangling image is not needed
continue
}
if filter != "" { // skip images with no references if filtering by tag
continue
}
newImage.RepoDigests = []string{"<none>@<none>"}
newImage.RepoTags = []string{"<none>:<none>"}
} else {
continue
}
} else if danglingOnly && len(newImage.RepoTags) > 0 {
continue
}
images = append(images, newImage)
}
sort.Sort(sort.Reverse(byCreated(images)))
return images, nil
}
func newImage(image *image.Image, size int64) *types.Image {
newImage := new(types.Image)
newImage.ParentID = image.Parent.String()
newImage.ID = image.ID().String()
newImage.Created = image.Created.Unix()
newImage.Size = size
newImage.VirtualSize = size
if image.Config != nil {
newImage.Labels = image.Config.Labels
}
return newImage
}