blah/.github/workflows/release.yml

name: Project build

# github's push and pull_request events
# will trigger this action to run
on: [push, pull_request, workflow_dispatch]

jobs:
  build:
    # names the job as "Build (___)" where the blank
    # is the name of the platform being built, e.g. "Build (Windows)"
    name: "Build (${{ matrix.platform.name }})"

    defaults:
      run:
        shell: bash

    runs-on: ${{ matrix.platform.os }}
    # causes a timeout if build step takes longer than 10 minutes
    # (avg. time for all builds during testing was ~4 minutes)
    timeout-minutes: 10
    strategy:
      # don't cancel other in-progress jobs if one fails
      fail-fast: false
      matrix:
        platform:
          - { name: "Windows", os: windows-latest }
          - { name: "MacOS", os: macos-latest }
          - { name: "Linux", os: ubuntu-20.04 }

    steps:
      # the only dependency required, allows workflow to access the commit
      # and the runner to find our CMakeLists.txt file
      - uses: actions/checkout@master

      - name: Create binary directory
        run: |
          cmake -B build
      - name: Build project binary
        run: |
          cmake --build build --config Release