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Mac tests workflow (palantir/python-language-server)

The Mac tests workflow from palantir/python-language-server, explained and optimized by Latchkey.

C

CI health: C - fair

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Source: palantir/python-language-server.github/workflows/test-mac.ymlLicense MITView source

What it does

This is the Mac tests workflow from the palantir/python-language-server 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: Mac tests

on:
  push:
    branches:
      - develop

  pull_request:
    branches:
      - '*'

jobs:
  build:
    name: Mac Py${{ matrix.PYTHON_VERSION }}
    runs-on: macos-latest
    env:
      CI: 'true'
      OS: 'macos'
      PYTHON_VERSION: ${{ matrix.PYTHON_VERSION }}
    strategy:
      fail-fast: false
      matrix:
        PYTHON_VERSION: ['3.8', '3.7', '3.6', '2.7']
    timeout-minutes: 10
    steps:
      - uses: actions/cache@v1
        with:
          path: ~/Library/Caches/pip
          key: ${{ runner.os }}-${{ matrix.PYTHON_VERSION }}-pip-${{ hashFiles('setup.py') }}
          restore-keys: ${{ runner.os }}-${{ matrix.PYTHON_VERSION }}-pip-
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
        with:
          python-version: ${{ matrix.PYTHON_VERSION }}
          architecture: 'x64'
      - name: Create Jedi environment for testing
        if: matrix.PYTHON_VERSION != '2.7'
        run: |
          python3 -m venv /tmp/pyenv
          /tmp/pyenv/bin/python -m pip install loghub
      - run: python -m pip install --upgrade pip setuptools
      - run: pip install -e .[all,test]
      - run: py.test -v test/

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: Mac tests
 
on:
  push:
    branches:
      - develop
 
  pull_request:
    branches:
      - '*'
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    name: Mac Py${{ matrix.PYTHON_VERSION }}
    runs-on: macos-latest
    env:
      CI: 'true'
      OS: 'macos'
      PYTHON_VERSION: ${{ matrix.PYTHON_VERSION }}
    strategy:
      fail-fast: false
      matrix:
        PYTHON_VERSION: ['3.8', '3.7', '3.6', '2.7']
    timeout-minutes: 10
    steps:
      - uses: actions/cache@v1
        with:
          path: ~/Library/Caches/pip
          key: ${{ runner.os }}-${{ matrix.PYTHON_VERSION }}-pip-${{ hashFiles('setup.py') }}
          restore-keys: ${{ runner.os }}-${{ matrix.PYTHON_VERSION }}-pip-
      - uses: actions/checkout@v2
      - uses: actions/setup-python@v2
        with:
          cache: 'pip'
          python-version: ${{ matrix.PYTHON_VERSION }}
          architecture: 'x64'
      - name: Create Jedi environment for testing
        if: matrix.PYTHON_VERSION != '2.7'
        run: |
          python3 -m venv /tmp/pyenv
          /tmp/pyenv/bin/python -m pip install loghub
      - run: python -m pip install --upgrade pip setuptools
      - run: pip install -e .[all,test]
      - run: py.test -v test/

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 (4 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/cache actions/checkout actions/setup-python