Add GitRepository namespace arg to `flux create image update`

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

cmd/flux/create_image_update.go

@@ -49,12 +49,26 @@ mentioned in YAMLs in a git repository.`,
     --push-branch=image-updates \
     --author-name=flux \
     --author-email=flux@example.com \
-    --commit-template="{{range .Updated.Images}}{{println .}}{{end}}"`,
+    --commit-template="{{range .Updated.Images}}{{println .}}{{end}}"
+
+  # Configure image updates for a Git repository in a different namespace
+  flux create image update apps \
+    --namespace=apps \
+    --git-repo-ref=flux-system \
+    --git-repo-namespace=flux-system \
+    --git-repo-path="./clusters/my-cluster" \
+    --checkout-branch=main \
+    --push-branch=image-updates \
+    --author-name=flux \
+    --author-email=flux@example.com \
+    --commit-template="{{range .Updated.Images}}{{println .}}{{end}}"
+`,
 	RunE: createImageUpdateRun,
 }
 
 type imageUpdateFlags struct {
-	gitRepoRef     string
+	gitRepoName      string
+	gitRepoNamespace string
 	gitRepoPath      string
 	checkoutBranch   string
 	pushBranch       string
@@ -67,7 +81,8 @@ var imageUpdateArgs = imageUpdateFlags{}
 
 func init() {
 	flags := createImageUpdateCmd.Flags()
-	flags.StringVar(&imageUpdateArgs.gitRepoRef, "git-repo-ref", "", "the name of a GitRepository resource with details of the upstream Git repository")
+	flags.StringVar(&imageUpdateArgs.gitRepoName, "git-repo-ref", "", "the name of a GitRepository resource with details of the upstream Git repository")
+	flags.StringVar(&imageUpdateArgs.gitRepoNamespace, "git-repo-namespace", "", "the namespace of the GitRepository resource, defaults to the ImageUpdateAutomation namespace")
 	flags.StringVar(&imageUpdateArgs.gitRepoPath, "git-repo-path", "", "path to the directory containing the manifests to be updated, defaults to the repository root")
 	flags.StringVar(&imageUpdateArgs.checkoutBranch, "checkout-branch", "", "the branch to checkout")
 	flags.StringVar(&imageUpdateArgs.pushBranch, "push-branch", "", "the branch to push commits to, defaults to the checkout branch if not specified")
@@ -84,7 +99,7 @@ func createImageUpdateRun(cmd *cobra.Command, args []string) error {
 	}
 	objectName := args[0]
 
-	if imageUpdateArgs.gitRepoRef == "" {
+	if imageUpdateArgs.gitRepoName == "" {
 		return fmt.Errorf("a reference to a GitRepository is required (--git-repo-ref)")
 	}
 
@@ -114,7 +129,8 @@ func createImageUpdateRun(cmd *cobra.Command, args []string) error {
 		Spec: autov1.ImageUpdateAutomationSpec{
 			SourceRef: autov1.CrossNamespaceSourceReference{
 				Kind:      sourcev1.GitRepositoryKind,
-				Name: imageUpdateArgs.gitRepoRef,
+				Name:      imageUpdateArgs.gitRepoName,
+				Namespace: imageUpdateArgs.gitRepoNamespace,
 			},
 
 			GitSpec: &autov1.GitSpec{