Python Lint and Test workflow (mietzen/porkbun-ddns)

The Python Lint and Test workflow from mietzen/porkbun-ddns, explained and optimized by Latchkey.

CI health: D - needs work

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Source: mietzen/porkbun-ddns.github/workflows/lint_and_test.ymlLicense MITView source

What it does

This is the Python Lint and Test workflow from the mietzen/porkbun-ddns repository, a real project running GitHub Actions. It is shown here with attribution under its MIT license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

workflow (.yml)

name: Python Lint and Test

on:
  pull_request:
    branches:
      - 'main'

jobs:
  Test:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
      fail-fast: false

    steps:
      - uses: actions/checkout@v7
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v6
        with:
          python-version: ${{ matrix.python-version }}
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install ruff pytest
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
      - name: Test with pytest
        run: |
          pytest ./porkbun_ddns/test
      - name: Lint with ruff
        env: 
          PY_VER: ${{ matrix.python-version }}
        run: |
          # stop the build if there are Python syntax errors or undefined names
          PY_VER=$(echo py${PY_VER} | tr -d '.')
          ruff check --output-format=github --ignore=E501 --exclude=__init__.py --target-version=${PY_VER} ./porkbun_ddns

  Check-Test:
    if: ${{ always() }}
    runs-on: ubuntu-latest
    needs:
      - Test
    steps:
      - run: |
          result="${{ needs.Test.result }}"
          if [[ $result == "success" || $result == "skipped" ]]; then
            exit 0
          else
            exit 1
          fi

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: Python Lint and Test
 
on:
  pull_request:
    branches:
      - 'main'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  Test:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
      fail-fast: false
 
    steps:
      - uses: actions/checkout@v7
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v6
        with:
          cache: 'pip'
          python-version: ${{ matrix.python-version }}
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install ruff pytest
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
      - name: Test with pytest
        run: |
          pytest ./porkbun_ddns/test
      - name: Lint with ruff
        env: 
          PY_VER: ${{ matrix.python-version }}
        run: |
          # stop the build if there are Python syntax errors or undefined names
          PY_VER=$(echo py${PY_VER} | tr -d '.')
          ruff check --output-format=github --ignore=E501 --exclude=__init__.py --target-version=${PY_VER} ./porkbun_ddns
 
  Check-Test:
    timeout-minutes: 30
    if: ${{ always() }}
    runs-on: latchkey-small
    needs:
      - Test
    steps:
      - run: |
          result="${{ needs.Test.result }}"
          if [[ $result == "success" || $result == "skipped" ]]; then
            exit 0
          else
            exit 1
          fi

What changed

Run on Latchkey managed runners with one line (runs-on), which apply the fixes below automatically and self-heal transient failures. This example uses latchkey-small; pick the runner size that fits the job.
Cancel superseded runs when a branch or PR gets a newer push.
Cache dependency installs on the setup step so they are served from cache.
Add a job timeout so a hung step cannot burn hours of runner time.

What Latchkey heals here

This workflow has steps that commonly fail on transient issues (network, registries, flaky browsers). On Latchkey managed runners they are detected, retried, and self-healed instead of failing your build:

Dependency installs

This workflow runs 2 jobs (6 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow

actions/checkout actions/setup-python