From d4aea2788175dabe5ec022c0e6267900f4c24194 Mon Sep 17 00:00:00 2001
From: Teppei Fukuda <knqyf263@gmail.com>
Date: Wed, 5 Jun 2024 14:33:12 +0400
Subject: [PATCH] ci: create release branch (#6859)

Signed-off-by: knqyf263 <knqyf263@gmail.com>
---
 .github/workflows/release-please.yaml | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/release-please.yaml b/.github/workflows/release-please.yaml
index 290cdce1c4ce..de3e0def9ddd 100644
--- a/.github/workflows/release-please.yaml
+++ b/.github/workflows/release-please.yaml
@@ -55,7 +55,7 @@ jobs:
         if: ${{ steps.extract_info.outputs.version }}
         uses: actions/github-script@v7
         with:
-          github-token: ${{ secrets.ORG_REPO_TOKEN }}
+          github-token: ${{ secrets.ORG_REPO_TOKEN }} # To trigger another workflow
           script: |
             await github.rest.git.createRef({
               owner: context.repo.owner,
@@ -64,6 +64,23 @@ jobs:
               sha: context.sha
             });
 
+      # When v0.50.0 is released, a release branch "release/v0.50" is created.
+      - name: Create release branch for patch versions
+        if: ${{ endsWith(steps.extract_info.outputs.version, '.0') }}
+        uses: actions/github-script@v7
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }} # Should not trigger the workflow again
+          script: |
+            const version = '${{ steps.extract_info.outputs.version }}';
+            const minorVersion = version.slice(0, version.lastIndexOf('.'));
+            const releaseBranch = `release/v${minorVersion}`;
+            await github.rest.git.createRef({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              ref: `refs/heads/${releaseBranch}`,
+              sha: context.sha
+            });
+
       # Since skip-github-release is specified, googleapis/release-please-action doesn't delete the label from PR.
       # This label prevents the subsequent PRs from being created. Therefore, we need to delete it ourselves.
       # cf. https://github.com/googleapis/release-please?tab=readme-ov-file#release-please-bot-does-not-create-a-release-pr-why
@@ -71,7 +88,7 @@ jobs:
         if: ${{ steps.extract_info.outputs.pr_number }}
         uses: actions/github-script@v7
         with:
-          github-token: ${{ secrets.ORG_REPO_TOKEN }}
+          github-token: ${{ secrets.GITHUB_TOKEN }}
           script: |
             const prNumber = parseInt('${{ steps.extract_info.outputs.pr_number }}', 10);
             github.rest.issues.removeLabel({