check_python.yml

name: Python Check

on:
  pull_request:
    types: [ opened, synchronize, reopened ]
  push:
    branches: [ master ]
  workflow_dispatch:

concurrency:
  group: static-python-check-${{ github.ref }}
  cancel-in-progress: true

permissions:
  contents: read
  security-events: write

jobs:
  detect:
    name: Python Changes Detection
    runs-on: ubuntu-latest
    outputs:
      python_changed: ${{ steps.changes.outputs.python_changed }}
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Check if Python files changed
        id: changes
        shell: bash
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -euo pipefail
          
          if [[ "${{ github.event_name }}" == "pull_request" ]]; then
            CHANGED_FILES=$(gh api \
              "repos/${{ github.repository }}/pulls/${{ github.event.pull_request.number }}/files" \
              --jq '.[].filename | select(endswith(".py") or . == "requirements.txt")')
          else
            CHANGED_FILES=$(git diff --name-only "${{ github.sha }}~1" "${{ github.sha }}" -- '*.py' 'requirements.txt')
          fi

          if [[ -n "$CHANGED_FILES" ]]; then
            echo "python_changed=true" >> "$GITHUB_OUTPUT"
          else
            echo "python_changed=false" >> "$GITHUB_OUTPUT"
          fi

  pylint-analysis:
    name: Pylint Static Code Analysis
    needs: detect
    if: needs.detect.outputs.python_changed == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548
        with:
          python-version: '3.13'
          cache: 'pip'

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Analyze code with Pylint
        id: analyze-code
        run: |
          pylint_score=$(pylint $(git ls-files '*.py')| grep 'rated at' | awk '{print $7}' | cut -d'/' -f1)
          echo "PYLINT_SCORE=$pylint_score" >> $GITHUB_ENV

      - name: Check Pylint score
        run: |
          if (( $(echo "$PYLINT_SCORE < 9.5" | bc -l) )); then
            echo "Failure: Pylint score is below 9.5 (project score: $PYLINT_SCORE)."
            exit 1
          else
            echo "Success: Pylint score is above 9.5 (project score: $PYLINT_SCORE)."
          fi

  black-check:
    name: Black Format Check
    needs: detect
    if: needs.detect.outputs.python_changed == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548
        with:
          python-version: '3.13'
          cache: 'pip'

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Check code format with Black
        id: check-format
        run: black --check $(git ls-files '*.py')

  pytest-test:
    name: Pytest Unit Tests with Coverage
    needs: detect
    if: needs.detect.outputs.python_changed == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          persist-credentials: false
          fetch-depth: 0

      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548
        with:
          python-version: '3.13'
          cache: 'pip'

      - name: Install Python dependencies
        run: pip install -r requirements.txt

      - name: Check code coverage with Pytest
        run: pytest --cov=. -v tests/ --cov-fail-under=80

  mypy-check:
    name: Mypy Type Check
    needs: detect
    if: needs.detect.outputs.python_changed == 'true'
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8
        with:
          persist-credentials: false
          fetch-depth: 0

      - name: Set up Python
        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548
        with:
          python-version: '3.13'
          cache: 'pip'

      - name: Install dependencies
        run: pip install -r requirements.txt

      - name: Check types with Mypy
        id: check-types
        run: mypy .

  noop:
    name: No Operation
    needs: detect
    if: needs.detect.outputs.python_changed != 'true'
    runs-on: ubuntu-latest
    steps:
      - run: echo "No changes in the *.py files — passing."