name: vim-patches
on:
  schedule:
    - cron: '3 3 * * *'

jobs:
  update-vim-patches:
    runs-on: ubuntu-20.04
    permissions:
      contents: write
      pull-requests: write
    env:
      VIM_SOURCE_DIR: ${{ format('{0}/vim-src', github.workspace) }}
      VERSION_BRANCH: marvim/ci-version-update
      GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - uses: actions/checkout@v2
        with:
          repository: vim/vim
          path: ${{ env.VIM_SOURCE_DIR }}
          fetch-depth: 0

      - run: |
          gh release download -R neovim/neovim -p nvim.appimage
          chmod a+x nvim.appimage
          mkdir -p $HOME/.local/bin
          mv nvim.appimage $HOME/.local/bin/nvim
          printf '%s\n' "$HOME/.local/bin" >> $GITHUB_PATH

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

      - name: Update src/version.c
        id: update-version
        run: |
          git checkout -b ${VERSION_BRANCH}
          nvim -i NONE -u NONE --headless +'luafile scripts/vimpatch.lua' +q
          printf '::set-output name=NEW_PATCHES::%s\n' $([ -z "$(git diff)" ]; echo $?)

      - name: Automatic PR
        if: ${{ steps.update-version.outputs.NEW_PATCHES != 0 }}
        run: |
          git add -u
          git commit -m 'version.c: update [skip ci]'
          git push --force https://${GITHUB_ACTOR}:${GITHUB_TOKEN}@github.com/${GITHUB_REPOSITORY} ${VERSION_BRANCH}
          gh pr create --fill --label vim-patch --base ${GITHUB_REF#refs/heads/} --head ${VERSION_BRANCH} || true