name: Lua CI

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

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
    steps:
      - uses: actions/checkout@v6

      - id: todays-date
        run: echo "date=$(date +%F)" >> "$GITHUB_OUTPUT"

      - name: Restore cache for today's nightly.
        id: cache-neovim
        uses: actions/cache@v4
        with:
          path: _neovim
          key: ${{ runner.os }}-${{ matrix.rev }}-${{ steps.todays-date.outputs.date }}

      - name: Download neovim ${{ matrix.rev }}
        env:
          GH_TOKEN: ${{ github.token }}
          NEOVIM_VERSION: ${{ matrix.rev }}
        if: steps.cache-neovim.outputs.cache-hit != 'true'
        run: |
          mkdir -p _neovim
          gh release download \
            --output - \
            --pattern nvim-linux64.tar.gz \
            --repo neovim/neovim \
            "$NEOVIM_VERSION" | tar xvz --strip-components 1 --directory _neovim

      - name: Prepare
        run: |
          sudo apt-get update
          sudo apt-get install -y ripgrep
          sudo apt-get install -y silversearcher-ag
          echo "${PWD}/_neovim/bin" >> "$GITHUB_PATH"
          echo VIM="${PWD}/_neovim/share/nvim/runtime" >> "$GITHUB_ENV"

      - name: Run tests
        run: |
          nvim --version
          make luatest

  typecheck:
    name: Typecheck
    runs-on: ubuntu-latest
    strategy:
      matrix:
        nvim_version: [ stable ]
        luals_version: [ 3.13.6 ]
    steps:
      - uses: actions/checkout@v6

      - uses: rhysd/action-setup-vim@v1
        with:
          neovim: true
          version: ${{ matrix.nvim_version }}

      - name: Typecheck
        env:
          VIMRUNTIME: /home/runner/nvim-${{ matrix.nvim_version }}/share/nvim/runtime
        run: |
          make lua-typecheck