name: CI
on:
  push:
    paths-ignore: ['doc/**', 'docs/**', '**/*.md', 'hive_integration/**',
      'fluffy/**', '.github/workflows/fluffy.yml']
  # Disable `pull_request`.  Experimenting with using only `push` for PRs.
  #pull_request:
  #  paths-ignore: ['doc/**', 'docs/**', '**/*.md', 'hive_integration/**']
  workflow_dispatch:

jobs:
  build:
    strategy:
      fail-fast: false
      max-parallel: 20
      matrix:
        target:
          - os: linux
            cpu: amd64
            evmc: nimevm
          - os: linux
            cpu: i386
            evmc: nimevm
          - os: macos
            cpu: amd64
            evmc: nimevm
          - os: windows
            cpu: amd64
            evmc: nimevm
          - os: windows
            cpu: i386
            evmc: nimevm
          - os: linux
            cpu: amd64
            evmc: evmc
          - os: linux
            cpu: i386
            evmc: evmc
          - os: macos
            cpu: amd64
            evmc: evmc
          - os: windows
            cpu: amd64
            evmc: evmc
          - os: windows
            cpu: i386
            evmc: evmc
          # vm2
          - os: linux
            cpu: amd64
            evmc: nimvm2
          - os: linux
            cpu: i386
            evmc: nimvm2
          - os: windows
            cpu: amd64
            evmc: nimvm2
          - os: windows
            cpu: i386
            evmc: nimvm2
          - os: macos
            cpu: amd64
            evmc: nimvm2
        include:
          - target:
              os: linux
            builder: ubuntu-18.04
            shell: bash
          - target:
              os: macos
            builder: macos-10.15
            shell: bash
          - target:
              os: windows
            builder: windows-latest
            shell: msys2 {0}

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

    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }}-${{ matrix.target.evmc }}'
    runs-on: ${{ matrix.builder }}
    steps:
      - name: Checkout nimbus-eth1
        uses: actions/checkout@v2

      - name: Derive environment variables
        shell: bash
        run: |
          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            PLATFORM=x64
            GOARCH=amd64
            USE_MIRACL=0
          else
            PLATFORM=x86
            GOARCH=386
            USE_MIRACL=1
          fi
          echo "PLATFORM=${PLATFORM}" >> $GITHUB_ENV
          echo "GOARCH=${GOARCH}" >> $GITHUB_ENV
          echo "USE_MIRACL=${USE_MIRACL}" >> $GITHUB_ENV

          # libminiupnp / natpmp
          if [[ '${{ runner.os }}' == 'Linux' && '${{ matrix.target.cpu }}' == 'i386' ]]; then
            export CFLAGS="${CFLAGS} -m32 -mno-adx"
            echo "CFLAGS=${CFLAGS}" >> $GITHUB_ENV
          fi

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

          if [[ '${{ matrix.target.evmc }}' == 'evmc' ]]; then
            echo "ENABLE_EVMC=1" >> $GITHUB_ENV
            echo "ENABLE_VM2=0" >> $GITHUB_ENV
          elif [[ '${{ matrix.target.evmc }}' == 'nimvm2' ]]; then
            echo "ENABLE_EVMC=0" >> $GITHUB_ENV
            echo "ENABLE_VM2=1" >> $GITHUB_ENV
            case '${{ matrix.target.cpu }}:${{ runner.os }}' in
            'i386:Windows')
              # on a real win7/i386, there is only 64k optimiser space for gcc
              echo "ENABLE_VM2LOWMEM=1" >> $GITHUB_ENV
            esac
          else
            echo "ENABLE_EVMC=0" >> $GITHUB_ENV
            echo "ENABLE_VM2=0" >> $GITHUB_ENV
          fi

      - name: Install build dependencies (Linux i386)
        if: runner.os == 'Linux' && matrix.target.cpu == 'i386'
        run: |
          sudo dpkg --add-architecture i386
          sudo apt-fast update -qq
          sudo DEBIAN_FRONTEND='noninteractive' apt-fast install \
            --no-install-recommends -yq gcc-multilib g++-multilib \
            libz-dev:i386 libbz2-dev:i386 libssl-dev:i386 libpcre3-dev:i386
          mkdir -p external/bin
          cat << EOF > external/bin/gcc
          #!/bin/bash
          exec $(which gcc) -m32 "\$@"
          EOF
          cat << EOF > external/bin/g++
          #!/bin/bash
          exec $(which g++) -m32 "\$@"
          EOF
          chmod 755 external/bin/gcc external/bin/g++
          echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH

      - name: Restore rocksdb from cache (Macos/Linux)
        if: runner.os != 'Windows'
        id: rocksdb-cache
        uses: actions/cache@v1
        with:
          path: rocks-db-cache-${{ matrix.target.cpu }}
          key: 'rocksdb-v2-${{ matrix.target.os }}-${{ matrix.target.cpu }}'

      - name: Build and install rocksdb (Linux i386)
        # no librocksdb-dev:i386
        if: runner.os == 'Linux' && matrix.target.cpu == 'i386'
        run: |
          curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_rocksdb.sh
          bash build_rocksdb.sh rocks-db-cache-${{ matrix.target.cpu }}

      - name: Install rocksdb (Linux amd64)
        # mysterious illegal instruction error if we build our own librocksdb
        if: runner.os == 'Linux' && matrix.target.cpu == 'amd64'
        run: |
         sudo apt-get -q update
         sudo apt-get install -y librocksdb-dev libpcre3-dev

      - name: Build and install rocksdb (Macos)
        if: runner.os == 'Macos'
        run: |
          HOMEBREW_NO_AUTO_UPDATE=1 HOMEBREW_NO_INSTALL_CLEANUP=1 brew install ccache
          echo "/usr/local/opt/ccache/libexec" >> ${GITHUB_PATH}
          curl -O -L -s -S https://raw.githubusercontent.com/status-im/nimbus-build-system/master/scripts/build_rocksdb.sh
          bash build_rocksdb.sh rocks-db-cache-${{ matrix.target.cpu }}

      - name: MSYS2 (Windows i386)
        if: runner.os == 'Windows' && matrix.target.cpu == 'i386'
        uses: msys2/setup-msys2@v2
        with:
          path-type: inherit
          msystem: MINGW32
          install: >-
            base-devel
            git
            mingw-w64-i686-toolchain

      - 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

      - name: Restore Nim DLLs dependencies (Windows) from cache
        if: runner.os == 'Windows'
        id: windows-dlls-cache
        uses: actions/cache@v2
        with:
          path: external/dlls-${{ matrix.target.cpu }}
          # according to docu, idle caches are kept for up to 7 days
          # so change dlls# to force new cache contents (for some number #)
          key: dlls0-${{ matrix.target.cpu }}

      - name: Install DLLs dependencies (Windows)
        if: >
          steps.windows-dlls-cache.outputs.cache-hit != 'true' &&
          runner.os == 'Windows'
        run: |
          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            ROCKSDBSUB=x64
          else
            ROCKSDBSUB=x86
          fi
          DLLPATH=external/dlls-${{ matrix.target.cpu }}
          mkdir -p external
          curl -L "https://nim-lang.org/download/windeps.zip" -o external/windeps.zip
          7z x -y external/windeps.zip -o"$DLLPATH"
          # ROCKSDB
          curl -L "https://github.com/status-im/nimbus-deps/releases/download/nimbus-deps/nimbus-deps.zip" -o external/nimbus-deps.zip
          7z x -y external/nimbus-deps.zip
          cp "./$ROCKSDBSUB/librocksdb.dll" "$DLLPATH/librocksdb.dll"

      - name: Path to cached dependencies (Windows)
        if: >
          runner.os == 'Windows'
        run: |
          echo '${{ github.workspace }}'"/external/dlls-${{ matrix.target.cpu }}" >> $GITHUB_PATH

      - name: Get latest nimbus-build-system commit hash
        id: versions
        run: |
          getHash() {
            git ls-remote "https://github.com/$1" "${2:-HEAD}" | cut -f 1
          }
          nbsHash=$(getHash status-im/nimbus-build-system)
          echo "::set-output name=nimbus_build_system::$nbsHash"

      - name: Restore prebuilt Nim from cache
        id: nim-cache
        uses: actions/cache@v2
        with:
          path: NimBinaries
          key: 'nim-${{ matrix.target.os }}-${{ matrix.target.cpu }}-${{ steps.versions.outputs.nimbus_build_system }}'

      - name: Build Nim and Nimbus-eth1 dependencies
        run: |
          make -j${ncpu} ARCH_OVERRIDE=${PLATFORM} CI_CACHE=NimBinaries update

      - name: Run nimbus-eth1 tests (Windows)
        if: runner.os == 'Windows'
        run: |
          gcc --version
          DEFAULT_MAKE_FLAGS="-j${ncpu} ENABLE_EVMC=${ENABLE_EVMC}"
          mingw32-make ${DEFAULT_MAKE_FLAGS}
          build/nimbus.exe --help
          mingw32-make ${DEFAULT_MAKE_FLAGS} test
          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            mingw32-make ${DEFAULT_MAKE_FLAGS} test-reproducibility
          fi

      - name: Run nimbus-eth1 tests (Linux)
        if: runner.os == 'Linux'
        run: |
          export LD_LIBRARY_PATH="${LD_LIBRARY_PATH}:/usr/local/lib"
          DEFAULT_MAKE_FLAGS="-j${ncpu} USE_MIRACL=${USE_MIRACL} ENABLE_EVMC=${ENABLE_EVMC}"
          env CC=gcc make ${DEFAULT_MAKE_FLAGS}
          build/nimbus --help
          # CC, GOARCH, and CGO_ENABLED are needed to select correct compiler 32/64 bit
          env CC=gcc GOARCH=${GOARCH} CXX=g++ CGO_ENABLED=1 make ${DEFAULT_MAKE_FLAGS} test test-reproducibility

      - name: Run nimbus-eth1 tests (Macos)
        if: runner.os == 'Macos'
        run: |
          DEFAULT_MAKE_FLAGS="-j${ncpu} ENABLE_EVMC=${ENABLE_EVMC}"
          make ${DEFAULT_MAKE_FLAGS}
          build/nimbus --help
          # "-static" option will not work for osx unless static system libraries are provided
          make ${DEFAULT_MAKE_FLAGS} test test-reproducibility