parser_conformance.yml

# Test coverage job. It is run on pull request because it prints the results via comment
name: Parser conformance and comparison
on:
  pull_request:
    branches:
      - main
    paths:
      - 'crates/biome_js_syntax/**'
      - 'crates/biome_js_factory/**'
      - 'crates/biome_js_semantic/**'
      - 'crates/rome_js_parser/**'
      - 'crates/biome_rowan/**'
      - 'xtask/**'

env:
  RUST_LOG: info
  RUST_BACKTRACE: 1

jobs:
  coverage:
    permissions:
      pull-requests: write
    name: Parser conformance
    runs-on: ubuntu-latest

    steps:
      - name: Checkout PR Branch
        uses: actions/checkout@v4

      - name: Support longpaths
        run: git config core.longpaths true

      - name: Checkout PR Branch
        uses: actions/checkout@v4
        with:
          submodules: recursive

      - name: Install toolchain
        uses: moonrepo/setup-rust@v1

      - name: Compile
        run: cargo build --release --locked -p xtask_coverage

      - name: Run Test suites
        continue-on-error: true
        run: cargo coverage --json > new_results.json

      - name: Checkout main Branch
        uses: actions/checkout@v4
        with:
          clean: false
          ref: main
          submodules: recursive

      - name: Run Test suites on main branch
        continue-on-error: true
        run: cargo coverage --json > base_results.json

      - name: Compare results on ${{ matrix.os }}
        if: github.event_name == 'pull_request'
        id: comparison
        shell: bash
        run: |
          echo "## Parser conformance results on ${{ matrix.os }}" > output
          cargo coverage compare ./base_results.json ./new_results.json --markdown >> output
          cat output
          echo "comment<<EOF" >> $GITHUB_OUTPUT
          cat output >> $GITHUB_OUTPUT
          echo "EOF" >> $GITHUB_OUTPUT

      - name: Get the PR number
        if: github.event_name == 'pull_request'
        id: pr-number
        uses: kkak10/pr-number-action@v1.3

      - name: Find Previous Comment
        if: github.event_name == 'pull_request'
        uses: peter-evans/find-comment@v1.3.0
        id: previous-comment
        with:
          issue-number: ${{ steps.pr-number.outputs.pr }}
          body-includes: Parser conformance results on ${{ matrix.os }}

      - name: Update existing comment
        if: github.event_name == 'pull_request' && steps.previous-comment.outputs.comment-id
        uses: peter-evans/create-or-update-comment@v3
        continue-on-error: true
        with:
          comment-id: ${{ steps.previous-comment.outputs.comment-id }}
          body: |
            ${{ steps.comparison.outputs.comment }}
          edit-mode: replace

      - name: Write a new comment
        if: github.event_name == 'pull_request' && !steps.previous-comment.outputs.comment-id
        uses: peter-evans/create-or-update-comment@v3
        continue-on-error: true
        with:
          issue-number: ${{ steps.pr-number.outputs.pr }}
          body: |
            ${{ steps.comparison.outputs.comment }}

      - name: Clean cache
        run: cargo cache --autoclean