Add os, arch, and ismanifest to libpod image list

when listing images through the restful service, consumers want to know
if the image they are listing is a manifest or not because the libpod
endpoint returns both images and manifest lists.

in addition, we now add `arch` and `os` as fields in the libpod endpoint
for image listing as well.

Fixes: #22184
Fixes: #22185

Signed-off-by: Brent Baude <bbaude@redhat.com>

hack/xref-helpmsgs-manpages

@@ -52,7 +52,7 @@ my $Format_Exceptions = <<'END_EXCEPTIONS';
 # Deep internal structs; pretty sure these are permanent exceptions
 events       .Details
 history      .ImageHistoryLayer
-images       .ImageSummary
+images       .Arch .ImageSummary .Os .IsManifestList
 network-ls   .Network
 
 # FIXME: this one, maybe? But someone needs to write the text

pkg/api/handlers/compat/images.go

@@ -483,7 +483,7 @@ func GetImages(w http.ResponseWriter, r *http.Request) {
 
 	imageEngine := abi.ImageEngine{Libpod: runtime}
 
-	listOptions := entities.ImageListOptions{All: query.All, Filter: filterList}
+	listOptions := entities.ImageListOptions{All: query.All, Filter: filterList, ExtendedAttributes: utils.IsLibpodRequest(r)}
 	summaries, err := imageEngine.List(r.Context(), listOptions)
 	if err != nil {
 		utils.Error(w, http.StatusInternalServerError, err)

pkg/domain/entities/images.go

@@ -242,8 +242,11 @@ type ImageSearchReport = entitiesTypes.ImageSearchReport
 
 // Image List Options
 type ImageListOptions struct {
-	All    bool     `json:"all" schema:"all"`
+	All bool
-	Filter []string `json:"Filter,omitempty"`
+	// ExtendedAttributes is used by the libpod endpoint only to deliver extra information
+	// that the compat endpoint does not
+	ExtendedAttributes bool
+	Filter             []string
 }
 
 type ImagePruneOptions struct {

pkg/domain/entities/types/images.go

@@ -23,9 +23,15 @@ type ImageSummary struct {
 	Dangling    bool `json:",omitempty"`
 
 	// Podman extensions
-	Names   []string `json:",omitempty"`
+	Arch    string   `json:",omitempty"`
 	Digest  string   `json:",omitempty"`
 	History []string `json:",omitempty"`
+	// IsManifestList is a ptr so we can distinguish between a true
+	// json empty response and false.  the docker compat side needs to return
+	// empty; where as the libpod side needs a value of true or false
+	IsManifestList *bool    `json:",omitempty"`
+	Names          []string `json:",omitempty"`
+	Os             string   `json:",omitempty"`
 }
 
 func (i *ImageSummary) Id() string { //nolint:revive,stylecheck

pkg/domain/infra/abi/images_list.go

@@ -57,6 +57,21 @@ func (ir *ImageEngine) List(ctx context.Context, opts entities.ImageListOptions)
 				RepoTags:    img.Names(), // may include tags and digests
 				ParentId:    parentID,
 			}
+			if opts.ExtendedAttributes {
+				iml, err := img.IsManifestList(ctx)
+				if err != nil {
+					return nil, err
+				}
+				s.IsManifestList = &iml
+				if !iml {
+					imgData, err := img.Inspect(ctx, nil)
+					if err != nil {
+						return nil, err
+					}
+					s.Arch = imgData.Architecture
+					s.Os = imgData.Os
+				}
+			}
 			s.Labels, err = img.Labels(ctx)
 			if err != nil {
 				return nil, fmt.Errorf("retrieving label for image %q: you may need to remove the image to resolve the error: %w", img.ID(), err)

test/apiv2/12-imagesMore.at

@@ -90,3 +90,41 @@ t DELETE libpod/images/$IMAGE 200 \
 podman system connection rm $conn
 
 stop_registry
+
+# if an image is a manifest list, it should not have
+# anything for arch or os
+podman manifest create foobar
+t GET libpod/images/json 200  \ .[0].IsManifestList=true \
+                                .[0].Arch=null \
+                                .[0].Os=null
+
+
+# list images through the libpod endpoint should return
+# IsManifestList (bool), Arch (string), and Os (string)
+podman pull -q $IMAGE
+t GET libpod/images/json 200  \ .[0].IsManifestList=true\
+                                .[0].Arch=null \
+                                .[0].Os=null \
+                                '.[0].RepoDigests | length=1' \
+                                .[1].IsManifestList=false \
+                                .[1].Arch=amd64 \
+                                .[1].Os=linux
+
+# if a manifest list and an image are returned with libpod images
+# endpoint, then one should be a manifest with IsManifest only; and
+# the other image should have IsManifestList, Arch, and Os.
+podman manifest add --arch amd64 foobar $IMAGE
+t GET libpod/images/json 200    .[0].IsManifestList=true\
+                                .[0].Arch=null \
+                                .[0].Os=null \
+                                '.[0].RepoDigests | length=2' \
+                                .[1].IsManifestList=false \
+                                .[1].Arch=amd64 \
+                                .[1].Os=linux
+
+t GET images/json 200    .[0].IsManifestList=null \
+                                .[0].Arch=null \
+                                .[0].Os=null \
+                                .[1].IsManifestList=null \
+                                .[1].Arch=null \
+                                .[1].Os=null \