coverage.yml

name: Coverage

on:
  push:
    branches: [master]
  pull_request:
    branches: [master]

concurrency:
  group: coverage-${{ github.ref }}
  cancel-in-progress: ${{ github.event_name == 'pull_request' }}

env:
  OCAMLRUNPARAM: b

jobs:
  coverage:
    runs-on: ubuntu-24.04-arm
    steps:
      - name: Checkout
        uses: actions/checkout@v6

      - name: Use Node.js
        uses: actions/setup-node@v6
        with:
          cache: yarn
          node-version-file: .nvmrc

      - name: Install npm packages
        run: yarn install

      - name: Install system dependencies
        uses: awalsh128/cache-apt-pkgs-action@v1.4.3
        with:
          packages: bubblewrap darcs g++-multilib gcc-multilib mercurial musl-tools rsync cmake
          version: v4

      - name: Determine Rust toolchain version
        id: rust-version
        run: |
          version="$(awk -F '"' '/^rust-version[[:space:]]*=/ { print $2; exit }' rewatch/Cargo.toml)"
          echo "version=${version}" >> "$GITHUB_OUTPUT"

      - name: Install Rust toolchain
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: ${{ steps.rust-version.outputs.version }}
          components: clippy, rustfmt

      - name: Build rewatch
        run: cargo build --manifest-path rewatch/Cargo.toml --release

      - name: Copy rewatch binary
        run: |
          cp rewatch/target/release/rescript rescript
          ./scripts/copyExes.js --rewatch

      - name: Use OCaml
        uses: ocaml/setup-ocaml@v3.6.0
        with:
          ocaml-compiler: 5.3.0
          opam-pin: false

      - name: Install OPAM dependencies (incl. bisect_ppx)
        run: opam install . --deps-only --with-test --with-dev-setup

      - name: Run coverage
        run: opam exec -- make coverage

      - name: Upload coverage to Codecov
        uses: codecov/codecov-action@v5
        with:
          files: _coverage/coverage.json
          fail_ci_if_error: false
          token: ${{ secrets.CODECOV_TOKEN }}