Fix missing extensions in RHCOS release browser for 4.16+

- Fix an issue where extensions were not displayed in
the RHCOS release browser for versions 4.16 and later.

Signed-off-by: Renata Ravanelli <[email protected]>
(cherry picked from commit 7122058)

cmd/build-extensions-container.go

@@ -185,8 +185,34 @@ func buildExtensionContainer() error {
 		SizeInBytes:     float64(stat.Size()),
 		SkipCompression: true,
 	}
-	cosaBuild.MetaStamp = float64(time.Now().UnixNano())
+	fmt.Printf("Generating meta.json `extensions` entry for: %s\n", buildID)
+	// The /tmp/extensions.json file is generated as part of the extension container build process.
+	// For more details, refer to:
+	// https://github.com/openshift/os/blob/master/extensions/Dockerfile
+	extensionsFilePath:= "./tmp/extensions.json"
+	fileContent, err := os.ReadFile(extensionsFilePath)
+	if err != nil {
+		fmt.Printf("Error reading JSON file: %v\n", err)
+		return err
+	}
+	// Parse the JSON content into a map
+	packages := make(map[string]string)
+	err = json.Unmarshal(fileContent, &packages)
+	if err != nil {
+		fmt.Printf("Error parsing JSON content: %v\n", err)
+		return err
+	}
+
+	// Convert to extensionsInterfaceMap
+	extensionsInterfaceMap := make(map[string]interface{})
+	for key, value := range packages {
+		extensionsInterfaceMap[key] = value
+	}
 
+	cosaBuild.Extensions = &cosa.Extensions {
+		Manifest:        extensionsInterfaceMap,
+	}
+	cosaBuild.MetaStamp = float64(time.Now().UnixNano())
 	newBytes, err := json.MarshalIndent(cosaBuild, "", "    ")
 	if err != nil {
 		return err

src/build-extensions-container.sh

@@ -24,6 +24,7 @@ if [[ -f "${workdir}/src/config.json" ]]; then
 fi
 
 mkdir "${ctx_dir}/hotfixes"
+touch "${workdir}/tmp/extensions.json"
 tar -xC "${ctx_dir}/hotfixes" -f /dev/disk/by-id/virtio-hotfixes
 
 # Build the image, replacing the FROM directive with the local image we have.
@@ -33,6 +34,7 @@ img=localhost/extensions-container
 (set -x; podman build --from oci-archive:"$ostree_ociarchive" --network=host \
     --build-arg COSA=true --build-arg VARIANT="${variant}" --label version="$buildid" \
     --volume /etc/pki/ca-trust:/etc/pki/ca-trust:ro \
+    --volume "${workdir}"/tmp/extensions.json:/tmp/extensions.json \
     -t "${img}" -f extensions/Dockerfile "${ctx_dir}")
 
 # Call skopeo to export it from the container storage to an oci-archive.