name: Build and test

on:
  push:
    branches:
      - master
  pull_request:
    branches:
      - master

jobs:
  run:
    name: Build
    strategy:
      fail-fast: false
      matrix:
        os:
            - macos-latest
            - ubuntu-latest
            - windows-latest
        ocaml:
            - '4.08.1'
            - '4.03.0'
            - '4.12.0'

    runs-on: ${{ matrix.os }}
    steps:
      - uses: haya14busa/action-cond@v1
        id: path
        with:
          cond: ${{ matrix.os == 'windows-latest' }}
          if_true: "D:\\cygwin\\home\\runneradmin\\.opam"
          if_false: "~/.opam"

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

      - name: Cache opam
        id: cache-opam
        uses: actions/cache@v2
        with:
          path: ${{ steps.path.outputs.value }}
          key: opam-${{ matrix.os }}-${{ matrix.ocaml }}

      - name: Use OCaml ${{ matrix.ocaml }}
        uses: avsm/setup-ocaml@v1
        with:
          ocaml-version: ${{ matrix.ocaml }}

      - run: opam update -u
        if: steps.cache-opam.outputs.cache-hit == 'true'

      - run: opam pin -n .

      - run: opam depext -yt containers containers-data containers-thread

      - run: opam install -t containers containers-data containers-thread --deps-only
        if: matrix.os == 'ubuntu-latest'

      - run: |
          opam install -t containers containers-data --deps-only
          opam install containers-thread --deps-only  # no test deps
        if: matrix.os != 'ubuntu-latest'

      - run: opam exec -- dune build

      - run: opam exec -- dune runtest
        if: ${{ matrix.os == 'ubuntu-latest' }}

      - run: opam exec -- dune runtest -j 1 -p containers,containers-data # test only core and data on non-ubuntu platform
        if: ${{ matrix.os != 'ubuntu-latest' }}

      - name: Remove troublesome files for caching on windows
        if: matrix.os == 'windows-latest'
        run: |
            if (Test-Path D:\\cygwin\\home\\runneradmin\\.opam\\ocaml-variants.${{ matrix.ocaml }}+mingw64c\\.opam-switch\\sources\\ocamlbuild.0.14.0\\examples\\){Remove-Item –path D:\\cygwin\\home\\runneradmin\\.opam\\ocaml-variants.${{ matrix.ocaml }}+mingw64c\\.opam-switch\\sources\\ocamlbuild.0.14.0\\examples\\ –recurse}