name: CI
on:
  push:
    branches:
      - master
  pull_request:
  workflow_dispatch:

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        target:
          - os: linux
            cpu: amd64
          - os: linux
            cpu: i386
          - os: macos
            cpu: amd64
          - os: windows
            cpu: amd64
          - os: windows
            cpu: i386
        branch: [version-1-6, version-2-0, devel]
        include:
          - target:
              os: linux
            builder: ubuntu-20.04
          - target:
              os: macos
            builder: macos-12
          - target:
              os: windows
            builder: windows-latest

    defaults:
      run:
        shell: bash

    name: '${{ matrix.target.os }}-${{ matrix.target.cpu }} (Nim ${{ matrix.branch }})'
    runs-on: ${{ matrix.builder }}
    steps:
      - name: Checkout
        uses: actions/checkout@v3

      - name: Set GCC 10 as default compiler (Linux)
        if: runner.os == 'Linux' && matrix.target.cpu != 'i386'
        run: |
          sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-10 100 \
            --slave /usr/bin/g++ g++ /usr/bin/g++-10 \
            --slave /usr/bin/gcov gcov /usr/bin/gcov-10

      - 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-10-multilib g++-10-multilib \
            libssl-dev:i386 linux-libc-dev:i386
          mkdir -p external/bin
          cat << EOF > external/bin/gcc
          #!/bin/bash
          exec $(which gcc-10) -m32 "\$@"
          EOF
          cat << EOF > external/bin/g++
          #!/bin/bash
          exec $(which g++-10) -m32 "\$@"
          EOF
          chmod 755 external/bin/gcc external/bin/g++
          echo '${{ github.workspace }}/external/bin' >> $GITHUB_PATH

      - name: Restore llvm-mingw (Windows) from cache
        if: runner.os == 'Windows'
        id: windows-mingw-cache
        uses: actions/cache@v3
        with:
          path: external/mingw-${{ matrix.target.cpu }}
          key: 'mingw-llvm-17-${{ matrix.target.cpu }}'

      - name: Install llvm-mingw dependency (Windows)
        if: >
          steps.windows-mingw-cache.outputs.cache-hit != 'true' &&
          runner.os == 'Windows'
        run: |
          mkdir -p external
          MINGW_BASE="https://github.com/mstorsjo/llvm-mingw/releases/download/20230905"
          if [[ '${{ matrix.target.cpu }}' == 'amd64' ]]; then
            MINGW_URL="$MINGW_BASE/llvm-mingw-20230905-ucrt-x86_64.zip"
            ARCH=64
          else
            MINGW_URL="$MINGW_BASE/llvm-mingw-20230905-ucrt-i686.zip"
            ARCH=32
          fi
          curl -L "$MINGW_URL" -o "external/mingw-${{ matrix.target.cpu }}.zip"
          7z x -y "external/mingw-${{ matrix.target.cpu }}.zip" -oexternal/mingw-${{ matrix.target.cpu }}/
          mv external/mingw-${{ matrix.target.cpu }}/**/* ./external/mingw-${{ matrix.target.cpu }}

      - name: Restore Nim DLLs dependencies (Windows) from cache
        if: runner.os == 'Windows'
        id: windows-dlls-cache
        uses: actions/cache@v3
        with:
          path: external/dlls
          key: 'dlls'

      - name: Install DLL 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 external/windeps.zip -oexternal/dlls

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

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

          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 Nimble
        run: |
          env MAKE="${MAKE_CMD} -j${ncpu}" ARCH_OVERRIDE=${PLATFORM} NIM_COMMIT=${{ matrix.branch }} \
            QUICK_AND_DIRTY_COMPILER=1 QUICK_AND_DIRTY_NIMBLE=1 CC=gcc \
            bash scripts/build_nim.sh nim csources dist/nimble NimBinaries
          echo '${{ github.workspace }}/nim/bin' >> $GITHUB_PATH

      - name: Run tests
        run: |
          nim --version
          nimble --version
          gcc --version