Fix building kotsadm bundle (#4410)

.github/workflows/release.yaml

@@ -186,6 +186,10 @@ jobs:
     - name: Checkout
       uses: actions/checkout@v4
 
+    - uses: actions/setup-go@v5
+      with:
+        go-version: '^1.20.0'
+
     - name: Run bundle registry
       run: |
         mkdir -p kotsadm-bundle/images

pkg/image/airgap.go

@@ -217,19 +217,23 @@ func PushImagesFromTempRegistry(airgapRootDir string, imageList []string, option
 			return errors.Wrapf(err, "failed to parse source image %s", imageID)
 		}
 
-		// if kotsadm tag is set, change the tag of the kotsadm/kotsadm and kotsadm/kotsadm-migrations images
-		if options.KotsadmTag != "" && strings.HasPrefix(imageID, "kotsadm/kotsadm") {
-			i, err := imageutil.ChangeImageTag(imageID, options.KotsadmTag)
-			if err != nil {
-				return errors.Wrap(err, "failed to change kotsadm dest image tag")
-			}
-			imageID = i
-		}
-
 		destImage, err := imageutil.DestImage(options.Registry, imageID)
 		if err != nil {
 			return errors.Wrapf(err, "failed to get destination image for %s", imageID)
 		}
+
+		if options.KotsadmTag != "" {
+			// kotsadm tag is set, change the tag of the kotsadm and kotsadm-migrations images
+			imageName := imageutil.GetImageName(destImage)
+			if imageName == "kotsadm" || imageName == "kotsadm-migrations" {
+				di, err := imageutil.ChangeImageTag(destImage, options.KotsadmTag)
+				if err != nil {
+					return errors.Wrap(err, "failed to change kotsadm dest image tag")
+				}
+				destImage = di
+			}
+		}
+
 		destStr := fmt.Sprintf("docker://%s", destImage)
 		destRef, err := alltransports.ParseImageName(destStr)
 		if err != nil {

pkg/imageutil/image.go

@@ -282,6 +282,14 @@ func KustomizeImage(destRegistry registrytypes.RegistryOptions, image string) ([
 	return rewrittenImages, nil
 }
 
+// GetImageName returns the name of the image without the tag, digest, or registry
+func GetImageName(image string) string {
+	imageParts := strings.Split(image, "/")
+	lastPart := imageParts[len(imageParts)-1]
+	return StripImageTagAndDigest(lastPart)
+}
+
+// ChangeImageTag changes the tag of an image to the provided new tag
 func ChangeImageTag(image string, newTag string) (string, error) {
 	parsed, err := reference.ParseDockerRef(image)
 	if err != nil {

pkg/imageutil/image_test.go

@@ -1050,6 +1050,47 @@ func TestGetTag(t *testing.T) {
 	}
 }
 
+func Test_GetImageName(t *testing.T) {
+	tests := []struct {
+		name     string
+		image    string
+		expected string
+	}{
+		{
+			name:     "image with tag",
+			image:    "quay.io/someorg/myimage:0.1",
+			expected: "myimage",
+		},
+		{
+			name:     "image with digest",
+			image:    "quay.io/someorg/myimage@sha256:1234567890abcdef",
+			expected: "myimage",
+		},
+		{
+			name:     "image without tag or digest",
+			image:    "quay.io/someorg/myimage",
+			expected: "myimage",
+		},
+		{
+			name:     "image with tag and digest",
+			image:    "quay.io/someorg/myimage:0.1@sha256:1234567890abcdef",
+			expected: "myimage",
+		},
+		{
+			name:     "image with registry and port",
+			image:    "myregistry.com:5000/someorg/myimage:0.1",
+			expected: "myimage",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			result := GetImageName(test.image)
+			assert.Equal(t, test.expected, result)
+		})
+	}
+}
+
 func TestChangeImageTag(t *testing.T) {
 	tests := []struct {
 		name   string