main.yaml

name: Build, test, and check

on:
  pull_request:
  push:
    branches:
      - main

jobs:
  build:
    strategy:
      matrix:
        os:
          - ubuntu-latest
        ocaml-compiler:
          - 4.14.x
          - 5.1.x
    runs-on: ${{ matrix.os }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
      
      - name: Use OCaml ${{ matrix.ocaml-compiler }}
        uses: ocaml/setup-ocaml@v2
        with:
          ocaml-compiler: ${{ matrix.ocaml-compiler }}

      - name: Install OPAM dependencies
        run: opam install . --deps-only --with-test

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

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

  publish-docs:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Use OCaml 4.14.x
        uses: ocaml/setup-ocaml@v2
        with:
          ocaml-compiler: 4.14.x
          dune-cache: true

      - name: Install OPAM dependencies
        run: opam install . --deps-only --with-doc

      - name: Build docs
        run: opam exec -- dune build @doc

      - name: Upload docs
        uses: actions/upload-artifact@v2
        with:
          name: html-docs
          path: _build/default/_doc/_html/

  check-changes:
    runs-on: ubuntu-latest
    if: github.event_name == 'pull_request'
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine if CHANGES changed
        id: changes-changed
        uses: tj-actions/changed-files@v39
        with:
          files_yaml: |
            changes:
              - 'CHANGES'

      - name: Fail if CHANGES did not change
        if: steps.changes-changed.outputs.changes_any_changed == 'false'
        run: |
          echo "No changes made to the CHANGES file."
          echo "Please update the file with your changes."
          exit 1