Downgrade.yml

name: Downgrade

on: [pull_request, workflow_dispatch]

# Cancel redundant CI tests automatically
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  downgrade:
    name: Downgrade ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        version:
          - '1.8' # Needs to be lowest supported version
        os:
          - ubuntu-latest
        arch:
          - x64
    steps:
      - uses: actions/checkout@v4
      - uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.version }}
          arch: ${{ matrix.arch }}
      - run: julia -e 'using InteractiveUtils; versioninfo(verbose=true)'
      - uses: julia-actions/cache@v2
      - uses: julia-actions/julia-downgrade-compat@v1
        with: # As per documentation, we exclude packages within the Julia standard library
          skip: LinearAlgebra,SparseArrays,Random,Statistics,Test
      - uses: julia-actions/julia-buildpkg@v1
      - uses: julia-actions/julia-runtest@v1
        with:
          coverage: false