release.yml

name: Release

on:
  pull_request:
    types: [closed]
    branches: [main]

permissions:
  contents: write

jobs:
  release:
    if: >-
      github.event.pull_request.merged == true &&
      contains(github.event.pull_request.labels.*.name, 'release')
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Compute next version (CalVer YYYY.M.patch)
        id: version
        run: |
          YEAR=$(date -u +%Y)
          MONTH=$(date -u +%-m)
          PREFIX="${YEAR}.${MONTH}"

          # Find the latest tag matching this month's prefix
          LATEST=$(git tag --list "v${PREFIX}.*" --sort=-v:refname | head -n1)
          if [ -z "$LATEST" ]; then
            PATCH=0
          else
            PATCH=$(echo "$LATEST" | sed "s/v${PREFIX}\\.//")
            PATCH=$((PATCH + 1))
          fi

          VERSION="${PREFIX}.${PATCH}"
          echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
          echo "tag=v${VERSION}" >> "$GITHUB_OUTPUT"

      - name: Update version in Xcode project
        run: |
          VERSION="${{ steps.version.outputs.version }}"
          sed -i "s/MARKETING_VERSION = .*/MARKETING_VERSION = ${VERSION};/" \
            PadIO.xcodeproj/project.pbxproj
          sed -i "s/CURRENT_PROJECT_VERSION = .*/CURRENT_PROJECT_VERSION = ${VERSION};/" \
            PadIO.xcodeproj/project.pbxproj

      - name: Commit version bump and tag
        run: |
          TAG="${{ steps.version.outputs.tag }}"
          VERSION="${{ steps.version.outputs.version }}"

          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add PadIO.xcodeproj/project.pbxproj
          git commit -m "Bump version to ${VERSION}" || echo "No changes to commit"
          git tag -a "${TAG}" -m "Release ${VERSION}"
          git push origin main --follow-tags

      - name: Create GitHub Release
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          TAG="${{ steps.version.outputs.tag }}"
          gh release create "${TAG}" \
            --title "${TAG}" \
            --generate-notes \
            --notes-start-tag "$(git tag --sort=-v:refname | sed -n '2p')"