name: Nim Docs CI
on:
  push:
    paths:
      - 'compiler/docgen.nim'
      - 'compiler/renderverbatim.nim'
      - 'config/nimdoc.cfg'
      - 'doc/**.rst'
      - 'doc/**.md'
      - 'doc/nimdoc.css'
      - 'lib/**.nim'
      - 'nimdoc/testproject/expected/testproject.html'
      - 'tools/dochack/dochack.nim'
      - 'tools/kochdocs.nim'
      - '.github/workflows/ci_docs.yml'
      - 'koch.nim'

  pull_request:
    # Run only on changes on these files.
    paths:
      - 'compiler/docgen.nim'
      - 'compiler/renderverbatim.nim'
      - 'config/nimdoc.cfg'
      - 'doc/**.rst'
      - 'doc/**.md'
      - 'doc/nimdoc.css'
      - 'lib/**.nim'
      - 'nimdoc/testproject/expected/testproject.html'
      - 'tools/dochack/dochack.nim'
      - 'tools/kochdocs.nim'
      - '.github/workflows/ci_docs.yml'
      - 'koch.nim'

concurrency:
  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
  cancel-in-progress: true

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        target: [linux, windows, osx]
        include:
          - target: linux
            os: ubuntu-20.04
          - target: windows
            os: windows-2019
          - target: osx
            os: macos-11

    name: ${{ matrix.target }}
    runs-on: ${{ matrix.os }}
    timeout-minutes: 60 # refs bug #18178

    steps:
      - name: 'Checkout'
        uses: actions/checkout@v3
        with:
          fetch-depth: 2

      - name: 'Install build dependencies (macOS)'
        if: runner.os == 'macOS'
        run: brew install make

      - name: 'Install build dependencies (Windows)'
        if: runner.os == 'Windows'
        shell: bash
        run: |
          set -e
          . ci/funs.sh
          nimInternalInstallDepsWindows
          echo "${{ github.workspace }}/dist/mingw64/bin" >> "${GITHUB_PATH}"

      - name: 'Add build binaries to PATH'
        shell: bash
        run: echo "${{ github.workspace }}/bin" >> "${GITHUB_PATH}"

      - name: 'System information'
        shell: bash
        run: . ci/funs.sh && nimCiSystemInfo

      - name: 'Build csourcesAny (posix)'
        # this would work on windows and other CI use this on windows,
        # but we ensure here that `ci/build_autogen.bat` keeps working on windows.
        if: runner.os != 'Windows'
        shell: bash
        run: . ci/funs.sh && nimBuildCsourcesIfNeeded CC=gcc
          # was previously using caching via `actions/cache@v1` but this wasn't
          # used in other CI pipelines and it's unclear the added complexity
          # was worth the saving; can be revisited if needed.

      - name: 'Build csourcesAny (windows)'
        if: runner.os == 'Windows'
        shell: cmd
        run: ci/build_autogen.bat

      - name: 'Build koch'
        shell: bash
        run: nim c koch

      - name: 'Build the real compiler'
        shell: bash
        run: ./koch boot -d:release

      - name: 'Build documentation'
        shell: bash
        run: ./koch doc --git.commit:devel

      - name: 'Publish documentation to Github Pages'
        if: |
          github.event_name == 'push' && github.ref == 'refs/heads/devel' &&
          matrix.target == 'linux'
        uses: crazy-max/ghaction-github-pages@v3
        with:
          build_dir: doc/html
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}