cd-release-pr.yml

name: cd-release-pr

on:
  push:
    branches:
      - main

permissions:
  contents: write
  pull-requests: write

concurrency:
  group: cd-release-pr-${{ github.ref }}
  cancel-in-progress: true

jobs:
  create-release-pr:
    runs-on: blacksmith-2vcpu-ubuntu-2404
    if: |
      !contains(github.event.head_commit.message, '[skip-release]') &&
      !contains(github.event.head_commit.message, 'chore: bump version')
    steps:
      - name: Checkout
        uses: actions/checkout@v6
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          fetch-depth: 0

      - name: Configure git user
        run: |
          git config --global user.email "github-actions[bot]@users.noreply.github.com"
          git config --global user.name "github-actions[bot]"

      - name: Skip if bump PR already exists
        id: existing_bump_pr
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          COUNT=$(gh pr list \
            --repo "$GITHUB_REPOSITORY" \
            --state open \
            --json number,headRefName \
            --jq '[.[] | select(.headRefName | startswith("chore/bump-version-"))] | length')
          if [ "$COUNT" -gt 0 ]; then
            echo "skip=true" >> "$GITHUB_OUTPUT"
            echo "Existing bump PR found; skipping."
          else
            echo "skip=false" >> "$GITHUB_OUTPUT"
          fi

      - name: Bump patch version
        id: bump
        if: steps.existing_bump_pr.outputs.skip != 'true'
        run: |
          node <<'NODE'
          const fs = require("node:fs");

          const packageJsonPath = "package.json";
          const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, "utf8"));
          const version = String(packageJson.version ?? "");
          const match = version.match(/^(\d+)\.(\d+)\.(\d+)$/);
          if (!match) {
            throw new Error(`package.json version must be x.y.z, received "${version}"`);
          }

          const major = Number.parseInt(match[1], 10);
          const minor = Number.parseInt(match[2], 10);
          const patch = Number.parseInt(match[3], 10);
          const nextVersion = `${major}.${minor}.${patch + 1}`;

          packageJson.version = nextVersion;
          fs.writeFileSync(packageJsonPath, `${JSON.stringify(packageJson, null, 2)}\n`);
          fs.appendFileSync(process.env.GITHUB_OUTPUT, `new_version=${nextVersion}\n`);
          NODE

      - name: Create bump branch and commit
        id: bump_branch
        if: steps.existing_bump_pr.outputs.skip != 'true'
        run: |
          BRANCH="chore/bump-version-${{ github.run_id }}-${{ github.run_attempt }}"
          git checkout -b "$BRANCH"
          git add package.json
          git commit -m "chore: bump version to ${{ steps.bump.outputs.new_version }} [skip-release]"
          git push --set-upstream origin "$BRANCH"
          echo "branch=$BRANCH" >> "$GITHUB_OUTPUT"

      - name: Create release PR
        id: bump_pr
        if: steps.existing_bump_pr.outputs.skip != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          PR_URL=$(gh pr create \
            --repo "$GITHUB_REPOSITORY" \
            --base main \
            --head "${{ steps.bump_branch.outputs.branch }}" \
            --title "chore: bump version to ${{ steps.bump.outputs.new_version }}" \
            --body "Automated patch version bump for next release.")
          echo "pr_url=$PR_URL" >> "$GITHUB_OUTPUT"

      - name: Enable auto-merge on release PR
        if: steps.existing_bump_pr.outputs.skip != 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          gh pr merge "${{ steps.bump_pr.outputs.pr_url }}" \
            --repo "$GITHUB_REPOSITORY" \
            --squash \
            --auto \
            --delete-branch