Release workflow (vmagamedov/grpclib)

The Release workflow from vmagamedov/grpclib, explained and optimized by Latchkey.

What it does

This is the Release workflow from the vmagamedov/grpclib repository, a real project running GitHub Actions. It is shown here with attribution under its BSD-3-Clause license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

name: Release
on:
  push:
    tags: ["v*"]
jobs:
  release:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v4
    - uses: actions/cache@v4
      with:
        path: ~/.cache/pip
        key: pip-${{ hashFiles('requirements/release.txt') }} }}
    - uses: actions/setup-python@v5
      with:
        python-version: "3.10"
    - run: pip3 install -r requirements/release.txt
    - run: pip3 install -e .
    - run: make release
    - run: twine upload dist/*
      env:
        TWINE_USERNAME: "__token__"
        TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}

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: Release
on:
  push:
    tags: ["v*"]
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  release:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
    - uses: actions/checkout@v4
    - uses: actions/cache@v4
      with:
        path: ~/.cache/pip
        key: pip-${{ hashFiles('requirements/release.txt') }} }}
    - uses: actions/setup-python@v5
      with:
        cache: 'pip'
        python-version: "3.10"
    - run: pip3 install -r requirements/release.txt
    - run: pip3 install -e .
    - run: make release
    - run: twine upload dist/*
      env:
        TWINE_USERNAME: "__token__"
        TWINE_PASSWORD: ${{ secrets.TWINE_PASSWORD }}
 

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• Cancel superseded runs when a branch or PR gets a newer push.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.

This workflow runs 1 job per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.

Actions used in this workflow