main.yml

# This is a basic workflow to help you get started with Actions

name: CI

# Controls when the action will run. Triggers the workflow on push or pull request
# events but only for the master branch
on:
  push:
    branches: [ master ]
  pull_request:
    branches: [ master ]
  schedule:
    - cron: '0 12 */6 * *'

# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
  # This workflow contains a single job called "build"
  build:
    strategy:
      fail-fast: false
      matrix:
        os:
          - macos-latest
          - ubuntu-latest
          - windows-latest
        ocaml-compiler:
          - 4.13.0~beta1
    # The type of runner that the job will run on
    runs-on: ${{ matrix.os }}

    # Steps represent a sequence of tasks that will be executed as part of the job
    steps:
      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
      - uses: actions/checkout@v2
      - name: Cache
        uses: actions/cache@v2
        with:
          # A directory to store and save the cache
          path: ~/.opam
          # An explicit key for restoring and saving the cache
          key: ${{ matrix.os }}-${{ matrix.ocaml-compiler }}-${{ hashFiles('*.opam') }}-build

      - name: Set up OCaml ${{ matrix.ocaml-compiler }}
        uses: ocaml/setup-ocaml@v2
        with:
          # Version of the OCaml compiler to initialise
          ocaml-compiler: ${{ matrix.ocaml-compiler }}

      - run: opam install . --deps-only --with-test
      - run: opam exec -- dune runtest -p merlin,dot-merlin-reader