kyma-project · medmes · Nov 19, 2025
@@ -110,7 +110,7 @@ func getOCIRef(
 	accessSpec *localblob.AccessSpec,
 ) (*OCI, error) {
 	layerRef := OCI{}
-	if accessSpec.MediaType == mime.MIME_TAR {
+	if accessSpec.MediaType == mime.MIME_TAR || accessSpec.MediaType == mime.MIME_TGZ {
 		layerRef.Type = string(v1beta2.OciDirType)
 	} else {
 		layerRef.Type = string(v1beta2.OciRefType)

@@ -35,6 +35,19 @@ func TestParse(t *testing.T) {
 					Type: "oci-dir",
 				},
 			},
+		}, {
+			"should parse raw-manifest layer from mediaType: application/x-tgz",
+			"v1beta2_template_operator_tgz_format.yaml",
+			"1.0.0-tgz-format",
+			img.Layer{
+				LayerName: "raw-manifest",
+				LayerRepresentation: &img.OCI{
+					Repo: "europe-west3-docker.pkg.dev/sap-kyma-jellyfish-dev/template-operator/component-descriptors",
+					Name: testutils.DefaultFQDN,
+					Ref:  "sha256:d2cc278224a71384b04963a83e784da311a268a2b3fa8732bc31e70ca0c5bc52",
+					Type: "oci-dir",
+				},
+			},
 		}, {
 			"should parse raw-manifest layer from mediaType: application/octet-stream",
 			"v1beta2_template_operator_current_ocm.yaml",

@@ -2,6 +2,7 @@ package img
 
 import (
 	"archive/tar"
+	"compress/gzip"
 	"context"
 	"errors"
 	"fmt"
@@ -135,7 +136,17 @@ func (p PathExtractor) ExtractLayer(tarPath string) (string, error) {
 	}
 	defer tarFile.Close()
 
-	tarReader := tar.NewReader(tarFile)
+	var tarReader *tar.Reader
+	gzipReader, err := gzip.NewReader(tarFile)
+	if err == nil {
+		defer gzipReader.Close()
+		tarReader = tar.NewReader(gzipReader)
+	} else {
+		if _, err := tarFile.Seek(0, 0); err != nil {
+			return "", fmt.Errorf("failed to seek file: %w", err)
+		}
+		tarReader = tar.NewReader(tarFile)
+	}
 	for {
 		header, err := tarReader.Next()
 		if errors.Is(err, io.EOF) {

@@ -3,6 +3,7 @@ package img_test
 import (
 	"archive/tar"
 	"bytes"
+	"compress/gzip"
 	"fmt"
 	"os"
 	"path/filepath"
@@ -19,7 +20,19 @@ import (
 )
 
 func TestPathExtractor_ExtractLayer(t *testing.T) {
-	content, tarFilePath := generateDummyTarFile(t)
+	t.Run("should extract uncompressed tar file", func(t *testing.T) {
+		content, tarFilePath := generateDummyTarFile(t, false)
+		testExtractLayer(t, content, tarFilePath)
+	})
+
+	t.Run("should extract gzip-compressed tar file", func(t *testing.T) {
+		content, tarFilePath := generateDummyTarFile(t, true)
+		testExtractLayer(t, content, tarFilePath)
+	})
+}
+
+func testExtractLayer(t *testing.T, content []byte, tarFilePath string) {
+	t.Helper()
 	pathExtractor := img.NewPathExtractor()
 	numGoroutines := 5
 	resultCh := make(chan string, numGoroutines)
@@ -115,9 +128,11 @@ func TestPathExtractor_FetchLayerToFile(t *testing.T) {
 	}
 }
 
-func generateDummyTarFile(t *testing.T) ([]byte, string) {
+func generateDummyTarFile(t *testing.T, compress bool) ([]byte, string) {
 	t.Helper()
 	var buf bytes.Buffer
+
+	// Create tar writer
 	tarWriter := tar.NewWriter(&buf)
 
 	content := []byte("file-content")
@@ -135,8 +150,28 @@ func generateDummyTarFile(t *testing.T) ([]byte, string) {
 
 	err = tarWriter.Close()
 	require.NoError(t, err)
-	tarFilePath := filepath.Join(os.TempDir(), "test.tar")
-	err = os.WriteFile(tarFilePath, buf.Bytes(), 0o600)
+
+	// Get tar bytes
+	tarBytes := buf.Bytes()
+
+	// Optionally compress with gzip
+	if compress {
+		var gzipBuf bytes.Buffer
+		gzipWriter := gzip.NewWriter(&gzipBuf)
+		_, err = gzipWriter.Write(tarBytes)
+		require.NoError(t, err)
+		err = gzipWriter.Close()
+		require.NoError(t, err)
+		tarBytes = gzipBuf.Bytes()
+	}
+
+	// Write to file
+	ext := ".tar"
+	if compress {
+		ext = ".tar.gz"
+	}
+	tarFilePath := filepath.Join(os.TempDir(), "test"+ext)
+	err = os.WriteFile(tarFilePath, tarBytes, 0o600)
 	require.NoError(t, err)
 	return content, tarFilePath
 }

@@ -0,0 +1,82 @@
+apiVersion: operator.kyma-project.io/v1beta2
+kind: ModuleTemplate
+metadata:
+  name: template-operator-regular
+  namespace: kcp-system
+  annotations:
+    "operator.kyma-project.io/is-cluster-scoped": "false"
+    "operator.kyma-project.io/module-version": "1.0.0-tgz-format"
+spec:
+  channel: regular
+  mandatory: false
+  data:
+    apiVersion: operator.kyma-project.io/v1alpha1
+    kind: Sample
+    metadata:
+      name: sample-yaml
+    spec:
+      initKey: initValue
+      resourceFilePath: "./module-data/yaml"
+  descriptor:
+    component:
+      componentReferences: [ ]
+      creationTime: "2024-07-09T12:22:30Z"
+      name: kyma-project.io/module/template-operator
+      provider: kyma-project.io
+      repositoryContexts:
+        - baseUrl: europe-west3-docker.pkg.dev
+          componentNameMapping: urlPath
+          subPath: sap-kyma-jellyfish-dev/template-operator
+          type: OCIRegistry
+      resources:
+        - access:
+            imageReference: europe-docker.pkg.dev/kyma-project/prod/template-operator:1.0.0
+            type: ociArtifact
+          digest:
+            hashAlgorithm: SHA-256
+            normalisationAlgorithm: ociArtifactDigest/v1
+            value: 03a194e1dca2421755cec5ec1e946de744407e6e1ca3b671f715fee939e8d1fb
+          name: module-image
+          relation: external
+          type: ociArtifact
+          version: 1.0.0
+        - access:
+            localReference: sha256:d2cc278224a71384b04963a83e784da311a268a2b3fa8732bc31e70ca0c5bc52
+            mediaType: application/x-tgz
+            type: localBlob
+          digest:
+            hashAlgorithm: SHA-256
+            normalisationAlgorithm: genericBlobDigest/v1
+            value: d2cc278224a71384b04963a83e784da311a268a2b3fa8732bc31e70ca0c5bc52
+          name: raw-manifest
+          relation: local
+          type: directory
+          version: 1.0.0
+        - access:
+            localReference: sha256:9230471fa6a62ff7b1549e8d0e9ccb545896fabadf82d2ec4503fc798d2bcd8a
+            mediaType: application/x-tar
+            type: localBlob
+          digest:
+            hashAlgorithm: SHA-256
+            normalisationAlgorithm: genericBlobDigest/v1
+            value: 9230471fa6a62ff7b1549e8d0e9ccb545896fabadf82d2ec4503fc798d2bcd8a
+          name: default-cr
+          relation: local
+          type: directory
+          version: 1.0.0
+        - access:
+            localReference: sha256:b46281580f6377bf10672b5a8f156d183d47c0ec3bcda8b807bd8c5d520884bd
+            mediaType: application/octet-stream
+            type: localBlob
+          digest:
+            hashAlgorithm: SHA-256
+            normalisationAlgorithm: genericBlobDigest/v1
+            value: b46281580f6377bf10672b5a8f156d183d47c0ec3bcda8b807bd8c5d520884bd
+          name: associated-resources
+          relation: local
+          type: plainText
+          version: 1.0.0
+      sources: [ ]
+      version: 1.0.0-tgz-format
+    meta:
+      schemaVersion: v2