chore: parse image tag from generation config (#10956)

* chore: parse image tag from generation config

* update renovate config

.github/scripts/hermetic_library_generation.sh

@@ -21,7 +21,6 @@ set -e
 # The parameters of this script is:
 # 1. target_branch, the branch into which the pull request is merged.
 # 2. current_branch, the branch with which the pull request is associated.
-# 3. image_tag, the tag of gcr.io/cloud-devrel-public-resources/java-library-generation.
 # 3. [optional] generation_config, the path to the generation configuration,
 # the default value is generation_config.yaml in the repository root.
 while [[ $# -gt 0 ]]; do
@@ -35,10 +34,6 @@ case "${key}" in
     current_branch="$2"
     shift
     ;;
-  --image_tag)
-    image_tag="$2"
-    shift
-    ;;
   --generation_config)
     generation_config="$2"
     shift
@@ -61,11 +56,6 @@ if [ -z "${current_branch}" ]; then
   exit 1
 fi
 
-if [ -z "${image_tag}" ]; then
-  echo "missing required argument --image_tag"
-  exit 1
-fi
-
 if [ -z "${generation_config}" ]; then
   generation_config=generation_config.yaml
   echo "Use default generation config: ${generation_config}"
@@ -88,6 +78,9 @@ fi
 git show "${target_branch}":"${generation_config}" > "${baseline_generation_config}"
 config_diff=$(diff "${generation_config}" "${baseline_generation_config}" || true)
 
+# parse image tag from the generation configuration.
+image_tag=$(grep "gapic_generator_version" "${generation_config}" | cut -d ':' -f 2 | xargs)
+
 # run hermetic code generation docker image.
 docker run \
   --rm \

.github/workflows/hermetic_library_generation.yaml

@@ -22,8 +22,6 @@ jobs:
     # skip pull requests come from a forked repository
     if: github.event.pull_request.head.repo.full_name == github.repository
     runs-on: ubuntu-latest
-    env:
-      library_generation_image_tag: 2.41.0
     steps:
     - uses: actions/checkout@v4
       with:
@@ -37,8 +35,7 @@ jobs:
         [ -z "$(git config user.name)" ] && git config --global user.name "cloud-java-bot"
         bash .github/scripts/hermetic_library_generation.sh \
           --target_branch "${base_ref}" \
-          --current_branch "${head_ref}" \
-          --image_tag "${library_generation_image_tag}"
+          --current_branch "${head_ref}"
       env:
         base_ref: ${{ github.base_ref }}
         head_ref: ${{ github.head_ref }}

renovate.json

@@ -24,10 +24,8 @@
     ".kokoro/nightly/graalvm-sub-jobs/native*/common.cfg",
     ".kokoro/presubmit/graalvm-native*.cfg",
     "owl-bot-postprocessor/synthtool/gcp/templates/java-library/.kokoro/presubmit/graalvm-native*.cfg",
-    "generation_config.yaml",
     ".github/workflows/ci.yaml",
     ".github/workflows/generated_files_sync.yaml",
-    ".github/workflows/hermetic_library_generation.yaml",
     ".github/workflows/unmanaged_dependency_check.yaml"
   ],
   "regexManagers": [
@@ -57,22 +55,10 @@
       "depNameTemplate": "com.google.cloud:libraries-bom",
       "datasourceTemplate": "maven"
     },
-    {
-      "fileMatch": [
-        "generation_config.yaml"
-      ],
-      "matchStrings": [
-        "libraries_bom_version\\s*:\\s*(?<currentValue>.*?)\\n"
-      ],
-      "depNameTemplate": "com.google.cloud:libraries-bom",
-      "datasourceTemplate": "maven"
-    },
     {
       "fileMatch": [
         ".github/workflows/ci.yaml",
-        ".github/workflows/generated_files_sync.yaml",
-        ".github/workflows/hermetic_library_generation.yaml",
-        ".github/workflows/unmanaged_dependency_check.yaml"
+        ".github/workflows/generated_files_sync.yaml"
       ],
       "matchStrings": [
         "library_generation_image_tag\\s*:\\s*(?<currentValue>.*?)\\n"