chore: fix verify_library_generation.yaml for forks (#2716)

alicejli · JoeWang1127 · web-flow · commit e7231131d94d · 2024-05-02T13:14:28.000-04:00
PRs opened by renovate-bot are failing `verify_library_generation` because renovate-bot opens PRs from a fork rather than main. For instance googleapis/sdk-platform-java#2657 is failing: ``` env: base_ref: main head_ref: renovate/markupsafe-2.x + git checkout main Previous HEAD position was d84e6072d Merge 645951c0497bf9cdb42e6323cd90a08d77a1926a into 20a12bd[13](https://github.com/googleapis/sdk-platform-java/actions/runs/8914757209/job/24482995077?pr=2657#step:3:13)3d1465dca Switched to a new branch 'main' branch 'main' set up to track 'origin/main'. + git checkout renovate/markupsafe-2.x error: pathspec 'renovate/markupsafe-2.x' did not match any file(s) known to git ``` This updates the yaml file to explicitly fetch specific branches which should fix the issue. --------- Co-authored-by: Joe Wang <106995533+JoeWang1127@users.noreply.github.com>
diff --git a/sdk-platform-java/.github/workflows/verify_library_generation.yaml b/sdk-platform-java/.github/workflows/verify_library_generation.yaml
@@ -21,8 +21,10 @@ jobs:
       shell: bash
       run: |
         set -ex
-        git checkout "${base_ref}"
-        git checkout "${head_ref}"
+        git checkout "${base_ref}" # Checkout a detached head, and then fetch the base ref to populate the detached head.
+        git fetch --no-tags --prune origin +${base_ref}:refs/remotes/origin/${base_ref}
+        git checkout "${head_ref}" # Checkout a detached head, and then fetch the head ref to populate the detached head.
+        git fetch --no-tags --prune origin +${head_ref}:refs/remotes/origin/${head_ref}
         changed_directories="$(git diff --name-only ${base_ref} ${head_ref})"
         if [[ ${changed_directories} =~ "library_generation/" ]]; then
           echo "should_run=true" >> $GITHUB_OUTPUT
