From f3da2d90be9f008f833218a2b96a2d86f609865b Mon Sep 17 00:00:00 2001
From: Wojciech Knapik <wmknapik@gmail.com>
Date: Fri, 25 Oct 2024 18:45:14 +0200
Subject: [PATCH] Workaround for GitHub workflow limitation in
 rerun-compare-chromium-versions (1.71.x)

---
 .../rerun-compare-chromium-versions.yml         | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/rerun-compare-chromium-versions.yml b/.github/workflows/rerun-compare-chromium-versions.yml
index ed014b374d2d..013ecaeed43c 100644
--- a/.github/workflows/rerun-compare-chromium-versions.yml
+++ b/.github/workflows/rerun-compare-chromium-versions.yml
@@ -5,21 +5,25 @@ on:
     branches:
       - master
       - '[0-9]+.[0-9]+.x'
-    paths:
-      - package.json
+## TODO: If a PR touches >300 files, this filter may prevent the workflow from being executed
+#    paths:
+#      - package.json
     types:
       - closed
 
 jobs:
   rerun-compare-chromium-versions:
-    if: github.event.pull_request.merged == true
+## TODO: Temporary workaround for the above issue
+#    if: github.event.pull_request.merged == true
+    if: github.event.pull_request.merged == true && startsWith(github.head_ref, 'cr1')
     runs-on: ubuntu-latest
     env:
       GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       PR_SHA: ${{ github.event.pull_request.head.sha }}
       TARGET_SHA: ${{ github.event.pull_request.base.sha }}
     steps:
-      - run: |
+      - name: If a major Chromium bump was merged, rerun compare-chromium-versions in all PRs targeting the same branch
+        run: |
           shopt -s inherit_errexit
           set -eEo pipefail
 
@@ -28,9 +32,10 @@ jobs:
           pr_ver="$(chromium_ver "${PR_SHA:?}")"
           target_ver="$(chromium_ver "${TARGET_SHA:?}")"
 
-          echo "::notice::PR branch: ${pr_ver:?}, target branch: ${target_ver:?}"
+          echo "::notice::PR branch: ${GITHUB_HEAD_REF:?} (${pr_ver:?}), target branch: ${GITHUB_BASE_REF:?} (${target_ver:?})"
 
           if [[ "${pr_ver%%.*}" != "${target_ver%%.*}" ]]; then
+              echo "::notice::Rerunning compare-chromium-versions in PRs targeting ${GITHUB_BASE_REF:?}"
               while read -r pr_number head_sha; do
                   run_id="$(gh api "/repos/$GITHUB_REPOSITORY/actions/workflows/compare-chromium-versions.yml/runs?head_sha=${head_sha:?}" -q '.workflow_runs[0].id')"
                   pr_url="https://github.com/brave/brave-core/pull/${pr_number:?}"
@@ -43,5 +48,5 @@ jobs:
                   sleep 1
               done < <(gh -R "$GITHUB_REPOSITORY" pr list --limit 1000 --state open --base "$GITHUB_BASE_REF" --json number,headRefOid -q '.[]|"\(.number)\t\(.headRefOid)"')
           else
-              echo "Chromium major versions match, nothing to do"
+              echo "::notice::Chromium major versions match, nothing to do"
           fi