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CI testing workflow (reginabarzilaygroup/Sybil)

The CI testing workflow from reginabarzilaygroup/Sybil, explained and optimized by Latchkey.

C

CI health: C - fair

Run this on Latchkey for self-healing, caching, and up to 58% lower cost.

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Source: reginabarzilaygroup/Sybil.github/workflows/test.ymlLicense MITView source

What it does

This is the CI testing workflow from the reginabarzilaygroup/Sybil 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: CI testing

# see: https://help.github.com/en/actions/reference/events-that-trigger-workflows
on:
  # Trigger the workflow on push or pull request, but only for the main branch
  push:
    branches:
      - main
  pull_request:
    branches:
      - main

jobs:
  tests:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macOS-latest, windows-latest]
        python-version: [3.8, 3.9]

    # Timeout: https://stackoverflow.com/a/59076067/4521646
    timeout-minutes: 35

    steps:
    - uses: actions/checkout@v2
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-version }}

    # Github Actions: Run step on specific OS: https://stackoverflow.com/a/57948488/4521646
    - name: Setup macOS
      if: runner.os == 'macOS'
      run: |
        brew install libomp  # https://github.com/pytorch/pytorch/issues/20030

    - name: Install dependencies
      run: |
        pip install tox virtualenv setuptools
      shell: bash

    - name: Tests
      run: |
        tox -e build
        tox

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: CI testing
 
# see: https://help.github.com/en/actions/reference/events-that-trigger-workflows
on:
  # Trigger the workflow on push or pull request, but only for the main branch
  push:
    branches:
      - main
  pull_request:
    branches:
      - main
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  tests:
    runs-on: ${{ matrix.os }}
    strategy:
      fail-fast: false
      matrix:
        os: [ubuntu-latest, macOS-latest, windows-latest]
        python-version: [3.8, 3.9]
 
    # Timeout: https://stackoverflow.com/a/59076067/4521646
    timeout-minutes: 35
 
    steps:
    - uses: actions/checkout@v2
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        cache: 'pip'
        python-version: ${{ matrix.python-version }}
 
    # Github Actions: Run step on specific OS: https://stackoverflow.com/a/57948488/4521646
    - name: Setup macOS
      if: runner.os == 'macOS'
      run: |
        brew install libomp  # https://github.com/pytorch/pytorch/issues/20030
 
    - name: Install dependencies
      run: |
        pip install tox virtualenv setuptools
      shell: bash
 
    - name: Tests
      run: |
        tox -e build
        tox

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 1 job (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