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Tests workflow (cdt15/lingam)

The Tests workflow from cdt15/lingam, explained and optimized by Latchkey.

C

CI health: C - fair

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Source: cdt15/lingam.github/workflows/tests.ymlLicense MITView source

What it does

This is the Tests workflow from the cdt15/lingam 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: Tests

on:
  push:
  pull_request:

jobs:
  build:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12"]

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          cache: 'pip'

      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install flake8 pytest pytest-cov
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi

      - name: Lint with flake8
        run: |
          # stop the build if there are Python syntax errors or undefined names
          flake8 lingam --count --select=E9,F63,F7,F82 --show-source --statistics
          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
          flake8 lingam --count --exit-zero --ignore=E203,E501,E741,C901 --max-line-length=127 --statistics

      - name: Test with pytest
        run: |
          pytest -v --cov=lingam --cov-report=term-missing

  build-and-install:

    runs-on: ubuntu-latest
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12"]

    steps:
      - uses: actions/checkout@v4

      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          cache: 'pip'

      - name: Build sdist & wheel via pyproject.toml
        run: |
          python -m venv venv_b
          source venv_b/bin/activate
          python -m pip install --upgrade pip setuptools wheel build
          python -m build
          ls -la dist/
          echo "List sdist contents:"
          tar -tf dist/*.tar.gz | head -n 50

      - name: Test install from wheel
        run: |
          python -m venv venv_w
          source venv_w/bin/activate
          pip install --no-cache-dir dist/*.whl
          python -c "import lingam; print(lingam.__version__)"
          pip check

      - name: Test install from sdist
        run: |
          python -m venv venv_s
          source venv_s/bin/activate
          pip install --no-cache-dir dist/*.tar.gz
          python -c "import lingam; print(lingam.__version__)"
          pip check

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

name: Tests
 
on:
  push:
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
 
    runs-on: latchkey-small
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12"]
 
    steps:
      - uses: actions/checkout@v4
 
      - name: Set up Python ${{ matrix.python-version }}
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          cache: 'pip'
 
      - name: Install dependencies
        run: |
          python -m pip install --upgrade pip
          pip install flake8 pytest pytest-cov
          if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
 
      - name: Lint with flake8
        run: |
          # stop the build if there are Python syntax errors or undefined names
          flake8 lingam --count --select=E9,F63,F7,F82 --show-source --statistics
          # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
          flake8 lingam --count --exit-zero --ignore=E203,E501,E741,C901 --max-line-length=127 --statistics
 
      - name: Test with pytest
        run: |
          pytest -v --cov=lingam --cov-report=term-missing
 
  build-and-install:
    timeout-minutes: 30
 
    runs-on: latchkey-small
    strategy:
      matrix:
        python-version: ["3.10", "3.11", "3.12"]
 
    steps:
      - uses: actions/checkout@v4
 
      - name: Set up Python
        uses: actions/setup-python@v5
        with:
          python-version: ${{ matrix.python-version }}
          cache: 'pip'
 
      - name: Build sdist & wheel via pyproject.toml
        run: |
          python -m venv venv_b
          source venv_b/bin/activate
          python -m pip install --upgrade pip setuptools wheel build
          python -m build
          ls -la dist/
          echo "List sdist contents:"
          tar -tf dist/*.tar.gz | head -n 50
 
      - name: Test install from wheel
        run: |
          python -m venv venv_w
          source venv_w/bin/activate
          pip install --no-cache-dir dist/*.whl
          python -c "import lingam; print(lingam.__version__)"
          pip check
 
      - name: Test install from sdist
        run: |
          python -m venv venv_s
          source venv_s/bin/activate
          pip install --no-cache-dir dist/*.tar.gz
          python -c "import lingam; print(lingam.__version__)"
          pip check

What changed

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:

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