Lint code workflow (psf/requests)

The Lint code workflow from psf/requests, explained and optimized by Latchkey.

What it does

This is the Lint code workflow from the psf/requests repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

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

The workflow

name: Lint code

on: [push, pull_request]

permissions:
  contents: read

jobs:
  lint:
    runs-on: ubuntu-24.04
    timeout-minutes: 10

    steps:
    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      with:
        persist-credentials: false
    - name: Set up Python
      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
      with:
        python-version: "3.x"
    - name: Run pre-commit
      run: |
        python -m pip install pre-commit==4.6.0
        pre-commit run --show-diff-on-failure --color=always --all-files

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: Lint code
 
on: [push, pull_request]
 
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  lint:
    runs-on: latchkey-small
    timeout-minutes: 10
 
    steps:
    - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
      with:
        persist-credentials: false
    - name: Set up Python
      uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
      with:
        cache: 'pip'
        python-version: "3.x"
    - name: Run pre-commit
      run: |
        python -m pip install pre-commit==4.6.0
        pre-commit run --show-diff-on-failure --color=always --all-files
 

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• Cancel superseded runs when a branch or PR gets a newer push.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.

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 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow