main.yml

name: CI

# Controls when the action will run. Triggers the workflow on push or pull request
# events but only for the master branch
on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]

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

    steps:
      - name: Checkout
        uses: actions/checkout@v2
        # we don't need submodules for building the toolchain, but we do for everything else
        with:
          submodules: 'recursive'
          fetch-depth: 0 # submodule checkout does not work with depth=1 (the default)

      # needed both at compile- and runtime for the toolchain
      - name: Install toolchain dependencies
        run: sudo apt install -y libgmp-dev libmpfr-dev libmpc-dev

      # ndless-sdk
      # build the toolchain first
      # it takes ~40min to build, so we want to avoid that whenever possible!
      - uses: actions/cache@v2
        id: toolchain-cache
        with:
          path: ndless-sdk/toolchain/install
          # gcc/binutils/etc versions are in build_toolchain.sh, so that'll be part of our cache key
          key: ${{ matrix.os }}-${{ hashFiles('ndless-sdk/toolchain/build_toolchain.sh') }}
      - name: Build toolchain
        if: steps.toolchain-cache.outputs.cache-hit != 'true'
        working-directory: ndless-sdk/toolchain
        run: ./build_toolchain.sh
      
      # ndless
      - name: Set up PATH
        run: |
          echo "$GITHUB_WORKSPACE/ndless-sdk/toolchain/install/bin" >> $GITHUB_PATH
          echo "$GITHUB_WORKSPACE/ndless-sdk/bin" >> $GITHUB_PATH
      - name: Install dependencies
        run: sudo apt install -y libboost-program-options-dev
      - name: Build
        run: make -j4