.github/workflows/release.yaml

name: Publish Release

on:
  push:
    branches:
      - main  # Trigger on push to main branch

permissions:
  contents: write  # Ensure write access to push tags

jobs:
  release:
    name: Create GitHub Release
    runs-on: ubuntu-latest

    steps:
    # Step 1: Checkout the code
    - name: Checkout code
      uses: actions/checkout@v3

    # Step 2: Set up Python
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: '3.x'

    # Step 3: Install dependencies
    - name: Install dependencies
      run: pip install toml

    # Step 4: Extract version from pyproject.toml
    - name: Extract version
      id: get_version
      run: |
        VERSION=$(python -c "import toml; print(toml.load('pyproject.toml')['project']['version'])")
        echo "VERSION=$VERSION" >> $GITHUB_ENV

    # Step 5: Check if tag exists on remote
    - name: Check if tag exists on remote
      id: check_tag
      run: |
        if git ls-remote --tags origin | grep "refs/tags/v${{ env.VERSION }}"; then
          echo "Tag v${{ env.VERSION }} already exists on remote."
          echo "tag_exists=true" >> $GITHUB_ENV
        else
          echo "tag_exists=false" >> $GITHUB_ENV
        fi

    # Step 6: Create and push a new tag (if it doesn't exist)
    - name: Create Git tag
      if: env.tag_exists == 'false'
      run: |
        git config --global user.name "github-actions[bot]"
        git config --global user.email "github-actions[bot]@users.noreply.github.com"
        git tag -a "v${{ env.VERSION }}" -m "Release v${{ env.VERSION }}"
        git push origin "v${{ env.VERSION }}"

    # Step 7: Create GitHub release (if tag didn't exist)
    - name: Create GitHub Release
      if: env.tag_exists == 'false'
      uses: softprops/action-gh-release@v1
      with:
        tag_name: "v${{ env.VERSION }}"
      env:
        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
  
  pypi:
    name: Publish to PyPI
    runs-on: ubuntu-latest
    needs: release  # This job runs after the release job

    steps:
    # Step 1: Checkout the code
    - name: Checkout code
      uses: actions/checkout@v3

    # Step 2: Set up Python
    - name: Set up Python
      uses: actions/setup-python@v4
      with:
        python-version: '3.x'

    # Step 3: Install dependencies
    - name: Install dependencies
      run: pip install toml requests

    # Step 4: Extract current version from pyproject.toml
    - name: Extract current version
      id: get_version
      run: |
        VERSION=$(python -c "import toml; print(toml.load('pyproject.toml')['project']['version'])")
        echo "VERSION=$VERSION" >> $GITHUB_ENV

    # Step 5: Get latest version from PyPI
    - name: Get latest version from PyPI
      id: get_pypi_version
      run: |
        LATEST_PYPI_VERSION=$(python -c "import toml; import requests; PACKAGE_NAME = toml.load('pyproject.toml')['project']['name']; response = requests.get(f'https://pypi.org/pypi/{PACKAGE_NAME}/json'); print(response.json()['info']['version'])")
        echo "LATEST_PYPI_VERSION=$LATEST_PYPI_VERSION" >> $GITHUB_ENV

    # Step 6: Compare current version with the latest tag
    - name: Check if version is bumped
      id: check_version
      run: |
        if [ "${{ env.VERSION }}" = "${{ env.LATEST_PYPI_VERSION }}" ]; then
          echo "Version not bumped. Exiting."
          echo "version_bumped=false" >> $GITHUB_ENV
        else
          echo "Version bumped. Proceeding."
          echo "version_bumped=true" >> $GITHUB_ENV
        fi

    # Step 7: Install Flit (only if version bumped)
    - name: Install Flit
      if: env.version_bumped == 'true'
      run: pip install flit

    # Step 8: Create .pypirc file (only if version bumped)
    - name: Create .pypirc file
      if: env.version_bumped == 'true'
      run: |
        echo "[pypi]" > ~/.pypirc
        echo "username = __token__" >> ~/.pypirc
        echo "password = ${{ secrets.PYPI_API_TOKEN }}" >> ~/.pypirc

    # Step 9: Build and publish package (only if version bumped)
    - name: Build and Publish Package
      if: env.version_bumped == 'true'
      run: |
        flit build
        flit publish