name: Lua CI

on:
  push:
    branches:
      - main
    paths:
      - "**/*.lua"
  pull_request:
    branches:
      - main
    paths:
      - "**/*.lua"

jobs:
  # reference from: https://github.com/nvim-lua/plenary.nvim/blob/2d9b06177a975543726ce5c73fca176cedbffe9d/.github/workflows/default.yml#L6C3-L43C20
  run_tests:
    name: unit tests
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-22.04
            rev: v0.10.0/nvim-linux64.tar.gz
    steps:
      - uses: actions/checkout@v3
      - run: date +%F > todays-date
      - name: Restore cache for today's nightly.
        uses: actions/cache@v3
        with:
          path: _neovim
          key: ${{ runner.os }}-${{ matrix.rev }}-${{ hashFiles('todays-date') }}

      - name: Prepare
        run: |
          test -d _neovim || {
            mkdir -p _neovim
            curl -sL "https://github.com/neovim/neovim/releases/download/${{ matrix.rev }}" | tar xzf - --strip-components=1 -C "${PWD}/_neovim"
          }

      - name: Run tests
        run: |
          export PATH="${PWD}/_neovim/bin:${PATH}"
          export VIM="${PWD}/_neovim/share/nvim/runtime"
          # install nvim-lua/plenary.nvim
          git clone --depth 1 https://github.com/nvim-lua/plenary.nvim ~/.local/share/nvim/site/pack/vendor/start/plenary.nvim
          nvim --version
          make luatest

  stylua:
    name: Check Lua style
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # ratchet:actions/checkout@v4
      - name: Install stylua
        uses: baptiste0928/cargo-install@v3
        with:
          crate: stylua
          features: lua54
      - run: stylua --version
      - run: stylua --color always --check ./lua/ ./plugin/ ./tests/

  luacheck:
    name: Lint Lua
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # ratchet:actions/checkout@v4
      - name: Luacheck linter
        uses: lunarmodules/luacheck@cc089e3f65acdd1ef8716cc73a3eca24a6b845e4 # ratchet:lunarmodules/luacheck@v1
        with:
          args: ./lua/