name: CI

on:
  pull_request:
  push:

jobs:
  build:
    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - ubuntu-latest
          - windows-latest
        ocaml-compiler:
          - 5.2.x
          - 4.14.x
          - 4.13.x
        include:
          # OCaml 4.12.x: skipping windows (fail)
          - ocaml-compiler: 4.12.x
            os: ubuntu-latest
          - ocaml-compiler: 4.12.x
            os: macos-latest
          # OCaml 4.11.x: skipping macos & windows (fail)
          - ocaml-compiler: 4.11.x
            os: ubuntu-latest
          # OCaml 4.10.x: skipping windows (fail)
          - ocaml-compiler: 4.10.x
            os: ubuntu-latest
          - ocaml-compiler: 4.10.x
            os: macos-latest
          # OCaml 4.08.x: skipping macos & windows (fail)
          # Keep the minimal version of OCaml in sync in here and `dune-project`
          - ocaml-compiler: 4.08.x
            os: ubuntu-latest

    runs-on: ${{ matrix.os }}

    steps:
      - name: Set git to use LF
        run: |
          git config --global core.autocrlf false
          git config --global core.eol lf
          git config --global core.ignorecase false

      - name: Checkout code
        uses: actions/checkout@v4

      - name: Use OCaml ${{ matrix.ocaml-compiler }}
        uses: ocaml/setup-ocaml@v3
        with:
          ocaml-compiler: ${{ matrix.ocaml-compiler }}

      - name: Install dependencies
        run: opam install . --deps-only --with-doc --with-test --with-dev-setup

      - name: Build
        run: opam exec -- dune build

      - name: Run tests
        run: opam exec -- dune runtest

      - name: Check for uncommitted changes
        run: git diff --exit-code

      - name: Lint fmt
        uses: ocaml/setup-ocaml/lint-fmt@v3

      - name: Lint doc
        uses: ocaml/setup-ocaml/lint-doc@v3