name: Update API docs

on:
  # Trigger on push to branches `master` and `3.5`.
  push:
    branches: [ master, 3.5 ]
  # 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:
      # Used for stable dates in documentation examples. See #2070.
      SOURCE_DATE_EPOCH: "1893456000"

    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 \
            asciidoctor \
            cmake \
            dbus-x11 \
            gettext \
            gir1.2-gtk-3.0 \
            gir1.2-pango-1.0 \
            git \
            libdbus-1-dev \
            libgirepository1.0-dev \
            libnotify-bin \
            libpango1.0-dev \
            libstartup-notification0-dev \
            libx11-xcb-dev \
            libxcb-cursor-dev \
            libxcb-icccm4-dev \
            libxcb-keysyms1-dev \
            libxcb-randr0-dev \
            libxcb-shape0-dev \
            libxcb-util0-dev \
            libxcb-xfixes0-dev \
            libxcb-xinerama0-dev \
            libxcb-xkb-dev \
            libxcb-xrm-dev \
            libxcb-xtest0-dev \
            libxdg-basedir-dev \
            libxkbcommon-dev \
            libxkbcommon-x11-dev \
            xutils-dev \
            lua-discount \
            liblua5.3-dev \
            lua5.3

      - 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

      - uses: actions/checkout@v2

      - name: Build Awesome version string
        run: |
          # If this workflow is triggered by a pull request, we get a base branch.
          # Otherwise, check if the current commit has a meaningful name.
          if [ -n "${{ github.base_ref }}" ]; then
            AWESOME_VERSION="${{ github.base_ref }}"
          else
            AWESOME_VERSION="$(git rev-parse --abbrev-ref HEAD)"
          fi

          AWESOME_VERSION="${AWESOME_VERSION}-g$(git rev-parse --short HEAD)"

          if [ "${{ github.event_name }}" == "pull_request" &&  -n "${{ matrix.test_prev_commits }}" ]; then
            AWESOME_VERSION="${AWESOME_VERSION}-PR${{ github.event.number }}"
          elif [ "${{ github.event_name }}" == "pull_request" ]; then
            AWESOME_VERSION="v9999-PR${{ github.event.number }}"
          fi

          echo "AWESOME_VERSION=${AWESOME_VERSION}" >> ${GITHUB_ENV}

      - name: Create Build Environment
        run: cmake -E make_directory -B "${{ github.workspace }}/build"

      - name: Configure CMake
        run: |
          cmake -S ${{ github.workspace }} -B "${{ github.workspace}}/build" \
            -DAWESOME_VERSION=$AWESOME_VERSION \
            -DGENERATE_DOC=ON \
            -DGENERATE_MANPAGES=ON \
            -DDO_COVERAGE=OFF

      - name: Build
        run: cd "${{ github.workspace }}/build" && make

      - name: Run apidoc script
        env:
          PR_NUMBER: ${{ github.event.number }}
          APIDOC_TOKEN: ${{ secrets.AWESOME_ROBOT_TOKEN || github.token }}
          GITHUB_COMPARE: ${{ github.event.compare }}
        run: .github/scripts/apidoc.sh

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