name: Build and publish awesomewm.org

on:
  # Trigger on push to branche `master`.
  push:
    branches: [ master ]
  # Trigger on pull request events for PRs that have `master` as their target branch
  pull_request:
    branches: [ master ]

  # Allow running the workflow manually
  workflow_dispatch:

defaults:
  run:
    # GitHub Actions adds `errexit` and `pipefail` by default, but we add `xtrace`
    # to improve debugging some of the longer scripts.
    shell: /bin/bash -o errexit -o pipefail -o xtrace {0}

jobs:
  main:
    runs-on: ubuntu-20.04

    env:
      BUILD_WEB: "/tmp/build-web"

    steps:
      # Create a cache invalidation key based on the current year + week.
      # This way, packages will be checked for updates once every week.
      - name: Get Date
        id: get-date
        run: echo "::set-output name=date::$(/bin/date -u "+%Y%W")"

      - name: Cache apt packages
        id: cache-apt
        uses: actions/cache@v2
        with:
          path: /var/cache/apt/archives
          # The trailing number serves as a version flag that can be incremented
          # to invalidate the cache after changing the list of packages.
          key: ${{ github.workflow }}-${{ runner.os }}-${{ steps.get-date.outputs.date }}-apt-3

      - name: Download apt packages
        if: steps.cache-apt.outputs.cache-hit != 'true'
        run: |
          sudo apt-get update
          sudo apt-get install --download-only -y --no-install-recommends \
            ikiwiki \
            asciidoc \
            imagemagick \
            perlmagick \
            luarocks \
            cmake \
            libxcb-cursor-dev \
            libxcb-randr0-dev \
            libxcb-xtest0-dev \
            libxcb-xinerama0-dev \
            libxcb-shape0-dev \
            libxcb-util0-dev \
            libxcb-keysyms1-dev \
            libxcb-icccm4-dev \
            libxcb-xrm-dev \
            libxdg-basedir-dev \
            libstartup-notification0-dev \
            libxcb-xkb-dev \
            libxkbcommon-dev \
            libxkbcommon-x11-dev \
            gir1.2-pango-1.0 \
            xutils-dev \
            libgirepository1.0-dev \
            lua-discount

      - name: Install downloaded packages
        run: |
          sudo dpkg -i /var/cache/apt/archives/*.deb

      - name: Cache luarocks
        id: cache-luarocks
        uses: actions/cache@v2
        with:
          path: /tmp/luarocks
          key: ${{ github.workflow }}-${{ runner.os }}-luarocks-3.5.0

      - name: Install fresh Luarocks
        if: steps.cache-luarocks.outputs.cache-hit != 'true'
        run: |
          wget -O /tmp/luarocks.tar.gz https://github.com/luarocks/luarocks/archive/v3.5.0.tar.gz
          mkdir /tmp/luarocks
          tar -xf /tmp/luarocks.tar.gz -C /tmp/luarocks --strip-components=1
          cd /tmp/luarocks
          ./configure
          make build
          sudo make install

      - name: Install cached Luarocks
        if: steps.cache-luarocks.outputs.cache-hit == 'true'
        run: |
          cd /tmp/luarocks
          sudo make install

      - name: Install rocks
        run: |
          sudo -H luarocks install lgi
          sudo -H luarocks install ldoc

      - name: Install mdl
        run: |
          sudo gem install mdl -v 0.9.0

      - uses: actions/checkout@v2
        with:
          submodules: recursive

      - name: Get Awesome website target repo
        env:
          APIDOC_TOKEN: ${{ secrets.AWESOME_ROBOT_TOKEN || github.token }}
        run: |
          set -e
          git clone \
            https://${APIDOC_TOKEN}@github.com/awesomeWM/awesomeWM.github.io \
            "$BUILD_WEB" 2>&1 | sed "s/$APIDOC_TOKEN/APIDOC_TOKEN/g"
          if [ "${{ github.event_name }}" != 'pull_request' ]; then
            branch="${{ github.head_ref || github.ref_name }}"
          else
            branch="pr-${{ github.event.pull_request.number }}"
          fi
          if [ "$branch" != master ]; then
            cd "$BUILD_WEB"
            if ! git checkout -b "$branch" "origin/$branch"; then
              git checkout -b "$branch"
            fi
            cd -
          fi

      - name: Build website
        run: |
          cd "${{ github.workspace }}"
          PKG_CONFIG_PATH="$HOME/install/lib/pkgconfig" make build_for_gh_actions
          mdl --git-recurse .

      - name: Publish website
        if: github.event_name != 'pull_request'
        env:
          APIDOC_TOKEN: ${{ secrets.AWESOME_ROBOT_TOKEN || github.token }}
          CLOUDFLARE_ZONE: ${{ secrets.CLOUDFLARE_ZONE }}
          CLOUDFLARE_AUTH_EMAIL: ${{ secrets.CLOUDFLARE_AUTH_EMAIL }}
          CLOUDFLARE_AUTH_KEY: ${{ secrets.CLOUDFLARE_AUTH_KEY }}
        run: |
          set -e
          commit_hash=$(git rev-parse --short HEAD)
          cd "$BUILD_WEB"
          git config user.name "awesome-robot on GH Actions"
          git config user.email "awesome-robot@users.noreply.github.com"
          git add --all .
          NL=$'\n'
          git commit -m "Update from GH Actions for awesome-www@${commit_hash}${NL}${NL}Commits: ${{ github.event.pull_request.commits_url }}${NL}Build URL: https://github.com/${{github.repository}}/actions/runs/${{github.run_id}}"
          git --no-pager show --stat
          git push origin "$(git symbolic-ref --quiet HEAD)" 2>&1 | sed "s/$APIDOC_TOKEN/APIDOC_TOKEN/g"

          # Purge CloudFlare cache.
          curl -X DELETE "https://api.cloudflare.com/client/v4/zones/$CLOUDFLARE_ZONE/purge_cache" \
            -H "X-Auth-Email: $CLOUDFLARE_AUTH_EMAIL" \
            -H "X-Auth-Key: $CLOUDFLARE_AUTH_KEY" \
            -H "Content-Type: application/json" \
            --data '{"purge_everything":true}'

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