release.yml

name: Release Unity Package

on:
  push:
    branches: [ master ]
  workflow_dispatch:
    inputs:
      bump:
        description: "Version bump type (patch/minor/major)"
        required: false
        default: "patch"

permissions:
  contents: write
  pull-requests: write

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout repo
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Install jq
        run: sudo apt-get install -y jq

      - name: Get current version
        id: get_version
        run: |
          version=$(jq -r '.version' package.json)
          echo "current_version=$version" >> $GITHUB_OUTPUT
          echo "Current version: $version"

      - name: Check for new commits since last tag
        id: check_commits
        run: |
          last_tag=$(git describe --tags --abbrev=0 2>/dev/null || echo "")
          if [ -z "$last_tag" ]; then
            commits=$(git log --pretty=format:"%h")
          else
            commits=$(git log $last_tag..HEAD --pretty=format:"%h")
          fi

          if [ -z "$commits" ]; then
            echo "no_new_commits=true" >> $GITHUB_OUTPUT
            echo "No new commits since last release."
          else
            echo "no_new_commits=false" >> $GITHUB_OUTPUT
            echo "New commits detected, proceeding with release."
          fi

      - name: Bump version
        if: steps.check_commits.outputs.no_new_commits == 'false'
        id: bump_version
        run: |
          bump="${{ github.event.inputs.bump || 'patch' }}"
          version=$(jq -r '.version' package.json)
          IFS='.' read -r major minor patch <<< "$version"
          case "$bump" in
            major) new_version="$((major + 1)).0.0" ;;
            minor) new_version="$major.$((minor + 1)).0" ;;
            *)     new_version="$major.$minor.$((patch + 1))" ;;
          esac
          jq ".version = \"$new_version\"" package.json > tmp.json && mv tmp.json package.json
          echo "new_version=$new_version" >> $GITHUB_OUTPUT
          echo "Version bumped to $new_version"

      - name: Generate changelog text
        if: steps.check_commits.outputs.no_new_commits == 'false'
        id: changelog
        run: |
          last_tag=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
          if [ -z "$last_tag" ]; then
            log=$(git log --pretty=format:"- %s (%h)")
          else
            log=$(git log $last_tag..HEAD --pretty=format:"- %s (%h)")
          fi

          log=$(echo "$log" | grep -v -E "Merge (pull request|branch)" || true)

          echo "$log" > changelog.txt
          echo "log<<EOF" >> $GITHUB_OUTPUT
          echo "$log" >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Update CHANGELOG.md
        if: steps.check_commits.outputs.no_new_commits == 'false'
        run: |
          VERSION=${{ steps.bump_version.outputs.new_version }}
          DATE=$(date +'%Y-%m-%d')
          echo "## v$VERSION - $DATE" > new_changelog.md
          cat changelog.txt >> new_changelog.md
          echo "" >> new_changelog.md
          if [ -f CHANGELOG.md ]; then
            cat CHANGELOG.md >> new_changelog.md
          fi
          mv new_changelog.md CHANGELOG.md

      - name: Create PR with version bump
        if: steps.check_commits.outputs.no_new_commits == 'false'
        uses: peter-evans/create-pull-request@v6
        with:
          commit-message: "chore: release v${{ steps.bump_version.outputs.new_version }}"
          branch: "release/v${{ steps.bump_version.outputs.new_version }}"
          title: "Release v${{ steps.bump_version.outputs.new_version }}"
          body: |
            This PR updates:
            - **package.json**
            - **CHANGELOG.md**

            After merging, a new draft GitHub release will be created automatically.
          labels: release
          add-paths: |
            package.json
            CHANGELOG.md

      - name: Create draft GitHub release
        if: steps.check_commits.outputs.no_new_commits == 'false'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: v${{ steps.bump_version.outputs.new_version }}
          name: Release ${{ steps.bump_version.outputs.new_version }}
          body: |
            🧩 Unity package **com.alexeytaranov.serializereferencedropdown**
            Version: ${{ steps.bump_version.outputs.new_version }}

            ### Changelog
            ${{ steps.changelog.outputs.log }}
          draft: true
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}