auto-release.yml

name: Auto Release

on:
  push:
    branches:
      - main

concurrency:
  group: release

jobs:
  publish:
    if: github.actor != 'weka-version-bumper[bot]'
    runs-on: ubuntu-latest
    permissions:
      contents: write

    steps:
      - uses: actions/create-github-app-token@v1
        id: app-token
        with:
          app-id: 919414
          private-key: ${{ secrets.WEKA_VERSION_BUMPER_PRIVATE_KEY }}

      - uses: actions/checkout@v4
        with:
          token: ${{ steps.app-token.outputs.token }}
          ref: main
          fetch-depth: 0

      - uses: actions/setup-node@v4
        with:
          node-version: '20'

      - run: |
          git config --global user.name 'github-actions'
          git config --global user.email 'github-actions@users.noreply.github.com'

      - run: git checkout main

      - name: Find latest stable v-prefixed tag
        id: latest_tag
        run: |
          LATEST_TAG=$(git tag -l 'v[0-9]*.[0-9]*.[0-9]*' --sort=-v:refname | grep -v -e '-beta' -e '-alpha' -e '-rc' | head -1)
          if [ -z "$LATEST_TAG" ]; then
            echo "No stable v-prefixed tag found. Exiting gracefully."
            echo "found=false" >> $GITHUB_OUTPUT
            exit 0
          fi
          echo "Latest stable tag: $LATEST_TAG"
          echo "found=true" >> $GITHUB_OUTPUT
          echo "tag=$LATEST_TAG" >> $GITHUB_OUTPUT

      - name: Determine bump type from PR labels
        if: steps.latest_tag.outputs.found == 'true'
        id: bump
        env:
          GH_TOKEN: ${{ steps.app-token.outputs.token }}
        run: |
          # Find the merged PR for this commit
          COMMIT_SHA="${{ github.sha }}"
          PR_NUMBER=$(gh pr list --search "$COMMIT_SHA" --state merged --json number --jq '.[0].number')

          if [ -z "$PR_NUMBER" ]; then
            echo "No merged PR found for commit $COMMIT_SHA. Defaulting to minor bump."
            echo "type=minor" >> $GITHUB_OUTPUT
            exit 0
          fi

          echo "Found merged PR #$PR_NUMBER"

          # Check for patch label
          HAS_PATCH=$(gh pr view "$PR_NUMBER" --json labels --jq '.labels[].name' | grep -c '^patch$' || true)

          if [ "$HAS_PATCH" -gt 0 ]; then
            echo "PR has 'patch' label → patch bump"
            echo "type=patch" >> $GITHUB_OUTPUT
          else
            echo "No 'patch' label → minor bump"
            echo "type=minor" >> $GITHUB_OUTPUT
          fi

      - name: Compute next version
        if: steps.latest_tag.outputs.found == 'true'
        id: next_version
        run: |
          LATEST_TAG="${{ steps.latest_tag.outputs.tag }}"
          BUMP_TYPE="${{ steps.bump.outputs.type }}"

          # Strip v prefix
          VERSION="${LATEST_TAG#v}"
          IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION"

          if [ "$BUMP_TYPE" = "patch" ]; then
            NEW_VERSION="$MAJOR.$MINOR.$((PATCH + 1))"
          else
            NEW_VERSION="$MAJOR.$((MINOR + 1)).0"
          fi

          echo "Bumping $BUMP_TYPE: $VERSION → $NEW_VERSION"
          echo "version=$NEW_VERSION" >> $GITHUB_OUTPUT

      - name: Update package.json version
        if: steps.latest_tag.outputs.found == 'true'
        run: npm version ${{ steps.next_version.outputs.version }} --no-git-tag-version --allow-same-version

      - name: Commit and tag
        if: steps.latest_tag.outputs.found == 'true'
        run: |
          git add package.json
          git commit -m 'publish v${{ steps.next_version.outputs.version }}'
          git tag 'v${{ steps.next_version.outputs.version }}'

      - name: Push commit and tag
        if: steps.latest_tag.outputs.found == 'true'
        run: |
          git push origin main
          git push origin tag 'v${{ steps.next_version.outputs.version }}'