pytest workflow (samsledje/D-SCRIPT)

The pytest workflow from samsledje/D-SCRIPT, explained and optimized by Latchkey.

What it does

This is the pytest workflow from the samsledje/D-SCRIPT 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

name: pytest

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

permissions:
  contents: read

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
    - uses: actions/checkout@v3

    - name: Set up Python 3.11
      uses: actions/setup-python@v3
      with:
        python-version: "3.11"

    - name: Install uv
      uses: astral-sh/setup-uv@v7

    - name: Install dependencies
      run: |
        uv sync --extra test --extra dev

    - name: Lint and format with ruff
      run: |
        uv run ruff check . --statistics
        uv run ruff format .

    - name: Test with pytest
      run: |
        uv run pytest --cov=dscript --cov-report=xml --cov-report=term-missing

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: pytest
 
on:
  push:
    branches: [ "main" ]
  pull_request:
    branches: [ "main" ]
 
permissions:
  contents: read
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
 
    steps:
    - uses: actions/checkout@v3
 
    - name: Set up Python 3.11
      uses: actions/setup-python@v3
      with:
        cache: 'pip'
        python-version: "3.11"
 
    - name: Install uv
      uses: astral-sh/setup-uv@v7
 
    - name: Install dependencies
      run: |
        uv sync --extra test --extra dev
 
    - name: Lint and format with ruff
      run: |
        uv run ruff check . --statistics
        uv run ruff format .
 
    - name: Test with pytest
      run: |
        uv run pytest --cov=dscript --cov-report=xml --cov-report=term-missing
 

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• Cancel superseded runs when a branch or PR gets a newer push.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

1 third-party action is referenced by a movable tag. Pin it to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

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