sync-behavior-coverage.yml

name: Sync Behavior Coverage

on:
  pull_request:
    branches: [main]

permissions:
  contents: write

jobs:
  sync:
    runs-on: ubuntu-latest
    if: github.event.pull_request.head.repo.full_name == github.repository

    steps:
      - name: Checkout PR branch
        uses: actions/checkout@v6
        with:
          ref: ${{ github.head_ref }}
          token: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up Elixir
        uses: erlef/setup-beam@v1
        with:
          otp-version: "27.3"
          elixir-version: "1.19"

      - name: Cache deps
        uses: actions/cache@v4
        with:
          path: |
            deps
            _build
          key: ${{ runner.os }}-mix-dev-otp27.3-elixir1.19-${{ hashFiles('mix.lock', 'mix.exs') }}
          restore-keys: ${{ runner.os }}-mix-dev-otp27.3-elixir1.19-

      - name: Install dependencies
        run: mix deps.get

      - name: Compile
        run: mix compile --warnings-as-errors

      - name: Regenerate language coverage
        run: mix codeqa.sample_report --apply-languages

      - name: Regenerate scalar vectors
        run: mix codeqa.sample_report --apply-scalars

      - name: Check for YAML drift
        id: diff
        run: |
          if git diff --quiet priv/combined_metrics/; then
            echo "changed=false" >> $GITHUB_OUTPUT
          else
            echo "changed=true" >> $GITHUB_OUTPUT
          fi

      - name: Commit and push updated YAMLs
        if: steps.diff.outputs.changed == 'true'
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add priv/combined_metrics/*.yml
          git commit -m "chore(combined-metrics): sync language coverage and scalar vectors [skip ci]"
          git push