test suite workflow (agronholm/anyio)

The test suite workflow from agronholm/anyio, explained and optimized by Latchkey.

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Source: agronholm/anyio.github/workflows/test.ymlLicense MITView source

What it does

This is the test suite workflow from the agronholm/anyio 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 suite

on:
  push:
    branches: [master]
  pull_request:

jobs:
  changed-files:
    runs-on: ubuntu-latest
    outputs:
      workflow-changed: ${{ steps.changed-files.outputs.workflow_any_changed }}
      pyproject-changed: ${{ steps.changed-files.outputs.src_any_changed }}
      src-changed: ${{ steps.changed-files.outputs.src_any_changed }}
      tests-changed: ${{ steps.changed-files.outputs.tests_any_changed }}
      docs-changed: ${{ steps.changed-files.outputs.doc_any_changed }}
    steps:
    - uses: actions/checkout@v7
    - name: Get changed files by category
      id: changed-files
      uses: tj-actions/changed-files@v47
      with:
        files_yaml: |
          workflow:
          - .github/workflows/test.yml
          pyproject:
          - pyproject.toml
          src:
          - src/**
          tests:
          - tests/**
          doc:
          - README.rst
          - docs/**

  pyright:
    runs-on: ubuntu-latest
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python
      uses: actions/setup-python@v6
      with:
        python-version: 3.x
    - uses: actions/cache@v6
      with:
        path: ~/.cache/pip
        key: pip-pyright
    - name: Install dependencies
      run: pip install -e . pyright
    - name: Run pyright
      run: pyright --ignoreexternal --verifytypes anyio

  test:
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15", "pypy3.11-v7.3.23"]
        extras: ["[trio]"]
        lowest-bound: [false]
        include:
        - os: macos-latest
          python-version: "3.10"
          extras: "[trio]"
        - os: macos-latest
          python-version: "3.14"
          extras: "[trio]"
        - os: windows-latest
          python-version: "3.10"
          extras: "[trio]"
        - os: windows-latest
          python-version: "3.14"
          extras: "[trio]"
        - name: only asyncio
          os: ubuntu-latest
          python-version: "3.14"
          extras: ""
        - name: oldest dependencies
          os: ubuntu-latest
          python-version: "3.10"
          extras: "[trio]"
          lowest-bound: true
    runs-on: ${{ matrix.os }}
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.pyproject-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
        || (needs.changed-files.outputs.tests-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v6
      with:
        python-version: ${{ matrix.python-version }}
        allow-prereleases: true
        cache: pip
        cache-dependency-path: pyproject.toml
    - name: Install the project and its dependencies
      if: matrix.lowest-bound == false
      run: pip install --group test -e .${{ matrix.extras }}
    - name: Install the project and its dependencies (lowest bound)
      if: matrix.lowest-bound == true
      run: |
        pip install uv
        uv pip install --system --resolution lowest-direct --group test -e .${{ matrix.extras }}
    - name: Patch /etc/hosts
      if: runner.os != 'Windows'
      run: |
        echo "1.2.3.4 xn--fa-hia.de" | sudo tee -a /etc/hosts
        echo "5.6.7.8 fass.de" | sudo tee -a /etc/hosts
    - name: Patch C:\Windows\System32\drivers\etc\hosts
      if: runner.os == 'Windows'
      run: |
        Add-Content -Path C:\Windows\System32\drivers\etc\hosts -Value "1.2.3.4 xn--fa-hia.de"
        Add-Content -Path C:\Windows\System32\drivers\etc\hosts -Value "5.6.7.8 fass.de"
    - name: Test with pytest
      run: coverage run -m pytest -v
      timeout-minutes: 10
      env:
        PYTEST_DISABLE_PLUGIN_AUTOLOAD: 1
    - name: Generate coverage report
      run: coverage xml
    - name: Trust Coveralls Homebrew tap (Homebrew 6 requirement)
      if: runner.os == 'macOS'
      run: brew trust coverallsapp/coveralls
    - name: Upload Coverage
      uses: coverallsapp/github-action@v2
      with:
        parallel: true
        file: coverage.xml

  docs:
    runs-on: ubuntu-latest
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.pyproject-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
        || (needs.changed-files.outputs.docs-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v6
      with:
        python-version: "3.11"
        cache: pip
        cache-dependency-path: pyproject.toml
    - name: Install the project and its dependencies
      run: pip install --group doc -e .
    - name: Build documentation
      run: sphinx-build -W docs build/sphinx

  coveralls:
    name: Finish Coveralls
    needs: test
    runs-on: ubuntu-latest
    steps:
    - name: Finished
      uses: coverallsapp/github-action@v2
      with:
        parallel-finished: true

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 suite
 
on:
  push:
    branches: [master]
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  changed-files:
    timeout-minutes: 30
    runs-on: latchkey-small
    outputs:
      workflow-changed: ${{ steps.changed-files.outputs.workflow_any_changed }}
      pyproject-changed: ${{ steps.changed-files.outputs.src_any_changed }}
      src-changed: ${{ steps.changed-files.outputs.src_any_changed }}
      tests-changed: ${{ steps.changed-files.outputs.tests_any_changed }}
      docs-changed: ${{ steps.changed-files.outputs.doc_any_changed }}
    steps:
    - uses: actions/checkout@v7
    - name: Get changed files by category
      id: changed-files
      uses: tj-actions/changed-files@v47
      with:
        files_yaml: |
          workflow:
          - .github/workflows/test.yml
          pyproject:
          - pyproject.toml
          src:
          - src/**
          tests:
          - tests/**
          doc:
          - README.rst
          - docs/**
 
  pyright:
    timeout-minutes: 30
    runs-on: latchkey-small
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python
      uses: actions/setup-python@v6
      with:
        cache: 'pip'
        python-version: 3.x
    - uses: actions/cache@v6
      with:
        path: ~/.cache/pip
        key: pip-pyright
    - name: Install dependencies
      run: pip install -e . pyright
    - name: Run pyright
      run: pyright --ignoreexternal --verifytypes anyio
 
  test:
    timeout-minutes: 30
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest]
        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14", "3.15", "pypy3.11-v7.3.23"]
        extras: ["[trio]"]
        lowest-bound: [false]
        include:
        - os: macos-latest
          python-version: "3.10"
          extras: "[trio]"
        - os: macos-latest
          python-version: "3.14"
          extras: "[trio]"
        - os: windows-latest
          python-version: "3.10"
          extras: "[trio]"
        - os: windows-latest
          python-version: "3.14"
          extras: "[trio]"
        - name: only asyncio
          os: ubuntu-latest
          python-version: "3.14"
          extras: ""
        - name: oldest dependencies
          os: ubuntu-latest
          python-version: "3.10"
          extras: "[trio]"
          lowest-bound: true
    runs-on: ${{ matrix.os }}
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.pyproject-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
        || (needs.changed-files.outputs.tests-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v6
      with:
        python-version: ${{ matrix.python-version }}
        allow-prereleases: true
        cache: pip
        cache-dependency-path: pyproject.toml
    - name: Install the project and its dependencies
      if: matrix.lowest-bound == false
      run: pip install --group test -e .${{ matrix.extras }}
    - name: Install the project and its dependencies (lowest bound)
      if: matrix.lowest-bound == true
      run: |
        pip install uv
        uv pip install --system --resolution lowest-direct --group test -e .${{ matrix.extras }}
    - name: Patch /etc/hosts
      if: runner.os != 'Windows'
      run: |
        echo "1.2.3.4 xn--fa-hia.de" | sudo tee -a /etc/hosts
        echo "5.6.7.8 fass.de" | sudo tee -a /etc/hosts
    - name: Patch C:\Windows\System32\drivers\etc\hosts
      if: runner.os == 'Windows'
      run: |
        Add-Content -Path C:\Windows\System32\drivers\etc\hosts -Value "1.2.3.4 xn--fa-hia.de"
        Add-Content -Path C:\Windows\System32\drivers\etc\hosts -Value "5.6.7.8 fass.de"
    - name: Test with pytest
      run: coverage run -m pytest -v
      timeout-minutes: 10
      env:
        PYTEST_DISABLE_PLUGIN_AUTOLOAD: 1
    - name: Generate coverage report
      run: coverage xml
    - name: Trust Coveralls Homebrew tap (Homebrew 6 requirement)
      if: runner.os == 'macOS'
      run: brew trust coverallsapp/coveralls
    - name: Upload Coverage
      uses: coverallsapp/github-action@v2
      with:
        parallel: true
        file: coverage.xml
 
  docs:
    timeout-minutes: 30
    runs-on: latchkey-small
    needs: changed-files
    if: |
      ${{
        (needs.changed-files.outputs.workflow-changed == 'true')
        || (needs.changed-files.outputs.pyproject-changed == 'true')
        || (needs.changed-files.outputs.src-changed == 'true')
        || (needs.changed-files.outputs.docs-changed == 'true')
      }}
    steps:
    - uses: actions/checkout@v7
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v6
      with:
        python-version: "3.11"
        cache: pip
        cache-dependency-path: pyproject.toml
    - name: Install the project and its dependencies
      run: pip install --group doc -e .
    - name: Build documentation
      run: sphinx-build -W docs build/sphinx
 
  coveralls:
    timeout-minutes: 30
    name: Finish Coveralls
    needs: test
    runs-on: latchkey-small
    steps:
    - name: Finished
      uses: coverallsapp/github-action@v2
      with:
        parallel-finished: true

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.

2 third-party actions are referenced by a movable tag. Pin them 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 5 jobs (11 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 tj-actions/changed-files actions/setup-python actions/cache