ruff-check.yml

name: Ruff check on changed files only

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]
  workflow_dispatch:

permissions:
  contents: read

jobs:
  ruff-changed-files:
    runs-on: ubuntu-latest

    steps:
      # 1. Checkout entire history for accurate diffs
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      # 2. Set up Python for Ruff
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: '3.12'

      # 3. Determine changed Python files in api-server/ and state-manager/
      - name: Get changed Python files
        id: changed-files
        run: |
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            BASE_SHA=${{ github.event.pull_request.base.sha }}
            HEAD_SHA=${{ github.sha }}
          else
            BASE_SHA=${{ github.event.before }}
            HEAD_SHA=${{ github.event.after }}
          fi

          # List all changed .py files in target directories
          FILES=$(git diff --name-only --diff-filter=ACMRT $BASE_SHA $HEAD_SHA \
                  | grep -E '^(api-server|state-manager)/.*\.py$' || true)

          echo "files=$FILES" >> "$GITHUB_OUTPUT"

      


      # 4. Install and Run Ruff on changed files, if any
      - name: Run Ruff on changed files
        if: steps.changed-files.outputs.files != ''
        run: |
          pip install ruff
          echo "Linting the following Python files:"
          echo "${{ steps.changed-files.outputs.files }}"
          ruff check ${{ steps.changed-files.outputs.files }}

      # 5. Skip Ruff when no relevant files changed
      - name: Skip Ruff if no files changed
        if: steps.changed-files.outputs.files == ''
        run: |
          echo "No Python files changed in api-server/ or state-manager/. Skipping Ruff."