Test Trogon workflow (Textualize/trogon)

The Test Trogon workflow from Textualize/trogon, explained and optimized by Latchkey.

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Source: Textualize/trogon.github/workflows/ci.yamlLicense MITView source

What it does

This is the Test Trogon workflow from the Textualize/trogon 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: Test Trogon

on:
  pull_request:
    paths:
      - '.github/workflows/pythonpackage.yml'
      - '**.py'
      - '**.pyi'
      - '**.css'
      - '**.lock'

jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-13, windows-latest]
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
    defaults:
      run:
        shell: bash
    steps:
      - uses: actions/checkout@v4.1.7
      - name: Install and configure Poetry
        uses: snok/install-poetry@v1.4.1
        with:
          version: 1.8.3
          virtualenvs-in-project: true
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5.2.0
        with:
          python-version: ${{ matrix.python-version }}
          architecture: x64
      - name: Load cached venv
        id: cached-poetry-dependencies
        uses: actions/cache@v4
        with:
          path: .venv
          key: venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock') }}
      - name: Install dependencies
        run: poetry install
        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
      - name: Test with pytest
        run: |
          source $VENV
          pytest tests

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: Test Trogon
 
on:
  pull_request:
    paths:
      - '.github/workflows/pythonpackage.yml'
      - '**.py'
      - '**.pyi'
      - '**.css'
      - '**.lock'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-13, windows-latest]
        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13"]
    defaults:
      run:
        shell: bash
    steps:
      - uses: actions/checkout@v4.1.7
      - name: Install and configure Poetry
        uses: snok/install-poetry@v1.4.1
        with:
          version: 1.8.3
          virtualenvs-in-project: true
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5.2.0
        with:
          cache: 'pip'
          python-version: ${{ matrix.python-version }}
          architecture: x64
      - name: Load cached venv
        id: cached-poetry-dependencies
        uses: actions/cache@v4
        with:
          path: .venv
          key: venv-${{ runner.os }}-${{ matrix.python-version }}-${{ hashFiles('**/poetry.lock') }}
      - name: Install dependencies
        run: poetry install
        if: steps.cached-poetry-dependencies.outputs.cache-hit != 'true'
      - name: Test with pytest
        run: |
          source $VENV
          pytest tests

What changed

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.

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 (15 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 actions/cache