libimage: pass UID/GID mappings through the pull path

Add UIDMap/GIDMap fields to CopyOptions and pass them to the storage
transport reference when pulling an image.

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>

Author: giuseppe

common/libimage/copier.go

@@ -19,6 +19,7 @@ import (
 	"go.podman.io/common/pkg/config"
 	"go.podman.io/common/pkg/retry"
 	"go.podman.io/image/v5/copy"
+	"go.podman.io/storage/pkg/idtools"
 	"go.podman.io/image/v5/docker/reference"
 	"go.podman.io/image/v5/pkg/compression"
 	"go.podman.io/image/v5/signature"
@@ -150,6 +151,13 @@ type CopyOptions struct {
 	// an access token for the registry.
 	IdentityToken string `json:"identitytoken,omitempty"`
 
+	// ----- ID Mapping ---------------------------------------------------
+
+	// UIDMap and GIDMap are used for setting up image layers with the
+	// correct UID/GID mappings when pulling into storage.
+	UIDMap []idtools.IDMap
+	GIDMap []idtools.IDMap
+
 	// ----- internal -----------------------------------------------------
 
 	// Additional tags when creating or copying a docker-archive.

common/libimage/pull.go

@@ -623,6 +623,9 @@ func (r *Runtime) copySingleImageFromRegistry(ctx context.Context, imageName str
 		if err != nil {
 			return nil, err
 		}
+		if len(options.UIDMap) > 0 || len(options.GIDMap) > 0 {
+			destRef.SetIDMappingOptions(options.UIDMap, options.GIDMap)
+		}
 
 		if err := writeDesc(); err != nil {
 			return nil, err