name: Conventional Commit Linter

on:
  push:
    branches:
      - main
  pull_request:

permissions:
  contents: read

jobs:
  commitlint:
    runs-on: ubuntu-latest
    steps:
      - name: Compute number of commits to fetch
        id: nb-of-commits
        # `+ 1` for PRs because of the merge commit
        run: |
          echo "toParse=$(echo "$EVENT" | jq -r 'if .commits then (.commits | length) else (.pull_request.commits + 1) end')" >> $GITHUB_OUTPUT
        env:
          EVENT: ${{ toJSON(github.event) }}
      - name: Checkout
        uses: actions/checkout@v7
        with:
          persist-credentials: false
          sparse-checkout: .
          fetch-depth: ${{ steps.nb-of-commits.outputs.toParse }}
      - uses: wagoid/commitlint-github-action@v6