name: Cross-build CI

on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

jobs:
  build:
    name: ${{ matrix.os }}
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-18.04, ubuntu-20.04, macOS-latest]

    steps:
      - uses: actions/checkout@v2
      - name: install LLVM+libarchive (Ubuntu)
        run: |
          wget -O /tmp/llvm.sh https://apt.llvm.org/llvm.sh
          chmod +x /tmp/llvm.sh
          sudo /tmp/llvm.sh 11
          sudo apt install -y libarchive-dev
          echo "::set-env name=EXTRA_MAKE_ARGS::--cross-bindir=/usr/lib/llvm-11/bin"
        if: ${{ startsWith(matrix.os, 'ubuntu') }}
      - name: install LLVM+libarchive (macOS)
        run: brew install llvm coreutils libarchive xz
        if: ${{ startsWith(matrix.os, 'macOS') }}
      - name: create build dir
        run: rm -rf ../build && mkdir -p ../build
      - name: make kernel-toolchain
        run: env MAKEOBJDIRPREFIX=`realpath ../build` ./tools/build/make.py $EXTRA_MAKE_ARGS TARGET=amd64 TARGET_ARCH=amd64 kernel-toolchain -s -j$(nproc)
      - name: make buildkernel
        run: env MAKEOBJDIRPREFIX=`realpath ../build` ./tools/build/make.py $EXTRA_MAKE_ARGS TARGET=amd64 TARGET_ARCH=amd64 KERNCONF=GENERIC NO_MODULES=yes buildkernel -s -j$(nproc)