build_wheels workflow (stlukey/whispercpp.py)

The build_wheels workflow from stlukey/whispercpp.py, explained and optimized by Latchkey.

What it does

This is the build_wheels workflow from the stlukey/whispercpp.py 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

name: build_wheels
run-name: ${{ github.actor }} is building wheels
on: [push]
jobs:
  build_wheels:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
      - uses: actions/checkout@v2
      - name: Checkout submodules
        run: |
          git submodule update --init --recursive
  
      - uses: actions/setup-python@v2
        with:
          python-version: '3.10'

      - name: Setup pip
        run: |
           python -m pip install --upgrade pip
           python -m pip install cibuildwheel==1.6.4
         
      - name:  Install
        run:   |
               if [ "$RUNNER_OS" == "Linux" ]; then
                    sudo apt-get update
                    sudo apt-get install gcc g++
               fi
        shell: bash

      - name: Build wheel
        run: python -m cibuildwheel --output-dir dist/
        env:
          CIBW_BUILD: cp36-* cp37-* cp38-*

      - uses: actions/upload-artifact@v2
        with:
          path: ./dist/*.whl

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: build_wheels
run-name: ${{ github.actor }} is building wheels
on: [push]
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build_wheels:
    timeout-minutes: 30
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
    steps:
      - uses: actions/checkout@v2
      - name: Checkout submodules
        run: |
          git submodule update --init --recursive
  
      - uses: actions/setup-python@v2
        with:
          cache: 'pip'
          python-version: '3.10'
 
      - name: Setup pip
        run: |
           python -m pip install --upgrade pip
           python -m pip install cibuildwheel==1.6.4
         
      - name:  Install
        run:   |
               if [ "$RUNNER_OS" == "Linux" ]; then
                    sudo apt-get update
                    sudo apt-get install gcc g++
               fi
        shell: bash
 
      - name: Build wheel
        run: python -m cibuildwheel --output-dir dist/
        env:
          CIBW_BUILD: cp36-* cp37-* cp38-*
 
      - uses: actions/upload-artifact@v2
        with:
          path: ./dist/*.whl
 

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.

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 (3 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