CI.yml

name: CI
on:
  push:
    branches:
      - main
    tags: '*'
  pull_request:
  schedule:
    - cron: "0 0 * * *"
concurrency:
  # Skip intermediate builds: always.
  # Cancel intermediate builds: only if it is a pull request build.
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
jobs:
  test:
    name: ${{ matrix.downgrade && 'Downgrade / ' || '' }}Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ matrix.num_threads }} threads - ${{ github.event_name }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        version:
          - '1.6'
          - '1'
          - 'pre'
        os:
          - ubuntu-latest
        arch:
          - x64
        num_threads:
          - 1
          - 2
        downgrade:
          - false
        include:
          - version: '1'
            os: ubuntu-latest
            arch: x64
            num_threads: 2
            downgrade: true
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.version }}
          arch: ${{ matrix.arch }}
      - uses: julia-actions/cache@v2
      - uses: julia-actions/julia-downgrade-compat@v1
        with:
          skip: LinearAlgebra,Random,Statistics
        if: ${{ matrix.downgrade }}
        name: Downgrade dependencies to oldest supported versions
      - uses: julia-actions/julia-buildpkg@v1
      - uses: julia-actions/julia-runtest@v1
        env:
          JULIA_NUM_THREADS: ${{ matrix.num_threads }}
      - uses: julia-actions/julia-processcoverage@v1
      - uses: codecov/codecov-action@v4
        with:
          files: lcov.info
          token: ${{ secrets.CODECOV_TOKEN }}
  docs:
    name: ${{ matrix.downgrade && 'Downgrade / ' || '' }}Documentation - Julia ${{ matrix.version }}
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        include:
          - version: '1'
            downgrade: false
          - version: '1.7'
            downgrade: true
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.version }}
      - uses: julia-actions/julia-downgrade-compat@v1.1
        with:
          skip: LinearAlgebra,Pathfinder,Random,Statistics,Folds,Transducers
          projects: ., docs
        if: matrix.downgrade
        name: Downgrade dependencies to oldest supported versions
      - uses: julia-actions/julia-buildpkg@v1
      - uses: julia-actions/julia-docdeploy@v1
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          DOCUMENTER_KEY: ${{ matrix.version == '1' && secrets.DOCUMENTER_KEY || '' }}
          GKSwstype: "100" # https://discourse.julialang.org/t/generation-of-documentation-fails-qt-qpa-xcb-could-not-connect-to-display/60988
          # don't deploy if it's a downgrade build
          DEPLOY_DOCS: ${{ !matrix.downgrade }}