check-version-bump.yaml

name: Check Version Bump

on:
  pull_request:
    branches:
      - main

permissions:
  contents: read

jobs:
  check-version-bump:
    name: Check Version Bump
    runs-on: ${{ contains(github.server_url, 'github.com') && 'ubuntu-latest' || fromJSON('["self-hosted"]') }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@v6
        with:
          python-version: "3.11"

      - name: Install version comparison dependency
        run: python -m pip install packaging

      - name: Check that version was bumped if src/ was modified
        run: |
          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"
          MERGE_BASE=$(git merge-base "$BASE_SHA" "$HEAD_SHA")

          CHANGED_FILES=$(git diff --name-only "$MERGE_BASE" "$HEAD_SHA")

          if echo "$CHANGED_FILES" | grep -qE "^src/.*\.(py|pyi|proto)$"; then
            BASE_VERSION=$(git show "$MERGE_BASE:pyproject.toml" | grep "^version = " | cut -d'"' -f2)
            HEAD_VERSION=$(git show "$HEAD_SHA:pyproject.toml" | grep "^version = " | cut -d'"' -f2)

            # Use PEP 440 ordering because sort -V ranks RCs above final releases
            python .github/scripts/check_version_bump.py \
              "$BASE_VERSION" "$HEAD_VERSION"

          else
            echo "No source file changes under src/. Version bump not required."
          fi