name: CI
on:
  push:
    paths-ignore: ['media/**', 'docs/**', '**/*.md']
    branches:
      - stable
      - testing
      - unstable
  pull_request:
    paths-ignore: ['media/**', 'docs/**', '**/*.md']
  workflow_dispatch:

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        target:
          - os: linux
            cpu: amd64
          - os: macos
            cpu: amd64
          - os: windows
            cpu: amd64
        branch: [version-1-2, version-1-6]
        include:
          - target:
              os: linux
            builder: ubuntu-20.04
            shell: bash
          - target:
              os: macos
            builder: macos-11
            shell: bash
          - target:
              os: windows
            builder: windows-2019
            shell: msys2 {0}

    defaults:
      run:
        shell: ${{ matrix.shell }}

    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }} (Nim ${{ matrix.branch }})'
    runs-on: ${{ matrix.builder }}
    steps:
      - name: Get branch name
        shell: bash
        run: |
          if [[ '${{  github.event_name }}' == 'pull_request' ]]; then
            echo "##[set-output name=branch_name;]$(echo ${GITHUB_HEAD_REF})"
            echo "Branch found (PR): ${GITHUB_HEAD_REF}"
          else
            echo "##[set-output name=branch_name;]$(echo ${GITHUB_REF#refs/heads/})"
            echo "Branch found (not PR): ${GITHUB_REF#refs/heads/}"
          fi
        id: get_branch

      - name: Cancel Previous Runs (except main branches)
        if: >
          steps.get_branch.outputs.branch_name != 'stable' &&
          steps.get_branch.outputs.branch_name != 'unstable' &&
          steps.get_branch.outputs.branch_name != 'testing'
        uses: styfle/cancel-workflow-action@0.9.1
        with:
          access_token: ${{ github.token }}

      - name: Checkout
        uses: actions/checkout@v2

      - name: MSYS2 (Windows amd64)
        if: runner.os == 'Windows' && matrix.target.cpu == 'amd64'
        uses: msys2/setup-msys2@v2
        with:
          path-type: inherit
          install: >-
            base-devel
            git
            mingw-w64-x86_64-toolchain
            mingw-w64-x86_64-cmake

      - name: Restore Nim DLLs dependencies (Windows) from cache
        if: runner.os == 'Windows'
        id: windows-dlls-cache
        uses: actions/cache@v2
        with:
          path: external/dlls
          key: 'dlls-${{ matrix.target.cpu }}'

      - name: Install DLLs dependencies (Windows)
        if: >
          steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
          runner.os == 'Windows'
        run: |
          mkdir -p external
          curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
          7z x -y external/windeps.zip -oexternal/dlls

      - name: Path to cached dependencies (Windows)
        if: >
          runner.os == 'Windows'
        run: |
          echo "${{ github.workspace }}/external/dlls" >> $GITHUB_PATH
          # for miniupnp that runs "wingenminiupnpcstrings.exe" from the current dir
          echo "." >> $GITHUB_PATH

      - name: Install build dependencies (macOS)
        if: runner.os == 'macOS'
        run: |
          brew install gnu-getopt
          brew link --force gnu-getopt

      - name: Derive environment variables
        run: |
          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            PLATFORM=x64
          else
            PLATFORM=x86
          fi
          echo "PLATFORM=${PLATFORM}" >> $GITHUB_ENV

          # Stack usage test on recent enough gcc:
          if [[ '${{ runner.os }}' == 'Linux' && '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            export NIMFLAGS="${NIMFLAGS} -d:limitStackUsage"
            echo "NIMFLAGS=${NIMFLAGS}" >> $GITHUB_ENV
          fi

          ncpu=""
          make_cmd="make"
          case '${{ runner.os }}' in
          'Linux')
            ncpu=$(nproc)
            ;;
          'macOS')
            ncpu=$(sysctl -n hw.ncpu)
            ;;
          'Windows')
            ncpu=${NUMBER_OF_PROCESSORS}
            make_cmd="mingw32-make"
            ;;
          esac
          [[ -z "$ncpu" || $ncpu -le 0 ]] && ncpu=1
          echo "ncpu=${ncpu}" >> $GITHUB_ENV
          echo "make_cmd=${make_cmd}" >> $GITHUB_ENV

      - name: Build Nim and Nimbus dependencies
        run: |
          ${make_cmd} -j ${ncpu} NIM_COMMIT=${{ matrix.branch }} ARCH_OVERRIDE=${PLATFORM} QUICK_AND_DIRTY_COMPILER=1 update
          ./env.sh nim --version

      - name: Get latest fixtures commit hash
        id: fixtures_version
        run: |
          getHash() {
            git ls-remote "https://github.com/$1" "${2:-HEAD}" | cut -f 1
          }
          fixturesHash=$(getHash status-im/nim-eth2-scenarios)
          echo "::set-output name=fixtures::${fixturesHash}"

      - name: Restore Ethereum Foundation fixtures from cache
        id: fixtures-cache
        uses: actions/cache@v2
        with:
          path: fixturesCache
          key: 'eth2-scenarios-${{ steps.fixtures_version.outputs.fixtures }}'

      # Important: even with a cache hit, this should be run
      # as it symlinks the cached items in their proper place
      - name: Get the Ethereum Foundation fixtures
        run: |
          scripts/setup_scenarios.sh fixturesCache

      - name: Build binaries (with trace logging enabled)
        run: |
          if [[ "${{ matrix.branch }}" == "version-1-6" ]]; then
            # change to "|| true" to hide the CI failures in GitHub's UI (escape hatch if a blocker is detected in 1.6)
            ${make_cmd} -j ${ncpu} V=1 NIM_COMMIT=${{ matrix.branch }} LOG_LEVEL=TRACE || false
          else
            ${make_cmd} -j ${ncpu} V=1 NIM_COMMIT=${{ matrix.branch }} LOG_LEVEL=TRACE
          fi
          # The Windows image runs out of disk space, so make some room
          rm -rf nimcache

      - name: Run tests
        run: |
          if [[ "${{ matrix.branch }}" == "version-1-6" ]]; then
            # change to "|| true" to hide the CI failures in GitHub's UI (escape hatch if a blocker is detected in 1.6)
            ${make_cmd} -j ${ncpu} V=1 NIM_COMMIT=${{ matrix.branch }} DISABLE_TEST_FIXTURES_SCRIPT=1 test || false
          else
            ${make_cmd} -j ${ncpu} V=1 NIM_COMMIT=${{ matrix.branch }} DISABLE_TEST_FIXTURES_SCRIPT=1 test
          fi

      # The upload creates a combined report that gets posted as a comment on the PR
      # https://github.com/EnricoMi/publish-unit-test-result-action
      - name: Upload combined results
        uses: actions/upload-artifact@v2
        with:
          name: Unit Test Results ${{ matrix.target.os }}-${{ matrix.target.cpu }}
          path: build/*.xml

  # https://github.com/EnricoMi/publish-unit-test-result-action
  event_file:
    name: "Event File"
    runs-on: ubuntu-latest
    steps:
    - name: Upload
      uses: actions/upload-artifact@v2
      with:
        name: Event File
        path: ${{ github.event_path }}