ci.yml

name: CI

on:
  push:
    branches: [main, master]
  pull_request:
  workflow_dispatch:

# Cancel superseded runs on the same ref to save CI minutes.
concurrency:
  group: ci-${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build-and-test:
    name: build & test (${{ matrix.rid }})
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        include:
          - os: ubuntu-latest
            rid: linux-x64
          - os: macos-14        # Apple Silicon runner -> osx-arm64
            rid: osx-arm64

    steps:
      - name: Checkout (with submodules)
        uses: actions/checkout@v4
        with:
          # tree-sitter/tree-sitter (and tree-sitter-cpp) are submodules; the native
          # build needs the core runtime sources.
          submodules: recursive

      - name: Set up .NET 10
        uses: actions/setup-dotnet@v4
        with:
          dotnet-version: '10.0.x'

      - name: Build native runtime + test grammars
        shell: bash
        run: |
          # Builds libtree-sitter (from the submodule) plus every grammar the test
          # suite uses, into native/<rid>/. On macOS, build-native.sh ad-hoc codesigns
          # each .dylib (mandatory: unsigned dylibs are SIGKILLed on load on arm64).
          chmod +x build/build-native.sh scripts/fetch-test-grammars.sh
          scripts/fetch-test-grammars.sh

      - name: List native artifacts
        shell: bash
        run: ls -l "native/${{ matrix.rid }}"

      - name: Build solution (Release)
        run: dotnet build TreeSitter.slnx -c Release

      - name: Test with coverage (Debug)
        shell: bash
        env:
          # Belt-and-braces: the test module initializer also sets this, but exporting
          # it here makes resolution robust regardless of working directory.
          TREE_SITTER_NATIVE_PATH: ${{ github.workspace }}/native/${{ matrix.rid }}
        run: |
          # Coverage is collected against the Debug configuration: JIT optimizations in
          # Release distort line/branch mapping, and the coverlet data collector's IL
          # instrumentation does not mix well with optimized [UnmanagedCallersOnly]
          # interop thunks. The Release build above validates the optimized compile;
          # this step produces the coverage report.
          dotnet test TreeSitter.slnx -c Debug \
            --collect:"XPlat Code Coverage" \
            --settings tests/TreeSitter.Tests/coverage.runsettings \
            --results-directory ./TestResults \
            --logger "trx;LogFileName=test-results.trx"

      - name: Upload coverage report
        if: always()
        uses: actions/upload-artifact@v4
        with:
          name: coverage-${{ matrix.rid }}
          path: |
            ./TestResults/**/coverage.cobertura.xml
            ./TestResults/**/*.trx
          if-no-files-found: warn