build.yml

name: Python package

on:
  push:
    branches:
    - main
  pull_request:
    branches:
    - main

jobs:

  first_build:
    name: Build for (${{ matrix.python-version }}, ${{ matrix.os }}; first build)
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: ['ubuntu-latest']  # In first build we only test 1 os
        python-version: ['3.11']  # In first build we only test 1 python version
    steps:
      - uses: actions/checkout@v3
      - uses: ./.github/actions/install-test-and-build
        with:
          python-version: ${{ matrix.python-version }}

  other_builds:
    name: Build for (${{ matrix.python-version }}, ${{ matrix.os }})
    runs-on: ${{ matrix.os }}
    needs: first_build
    strategy:
      fail-fast: false
      matrix:
        os: [ 'ubuntu-latest', 'macos-latest', 'windows-latest' ]
        python-version: [ '3.9', '3.11' ]  # Only first and last supported versions
        exclude:
          # already tested in first_build job
          - python-version: 3.11
            os: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: ./.github/actions/install-test-and-build
        with:
          python-version: ${{ matrix.python-version }}