Build workflow (powerapi-ng/powerapi)
The Build workflow from powerapi-ng/powerapi, explained and optimized by Latchkey.
CI health: D - needs work
Point runs-on at Latchkey and get caching, run de-duplication, job timeouts, self-healing for flaky steps, and up to 58% lower cost, applied automatically.
What it does
This is the Build workflow from the powerapi-ng/powerapi 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: Build
on:
push:
branches: ["master"]
pull_request:
branches: ["master"]
permissions:
contents: read
jobs:
run-tests:
name: Run linters and unit tests
runs-on: ubuntu-latest
strategy:
matrix:
python-version: ["3.12", "3.x"]
steps:
- uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0
with:
python-version: ${{ matrix.python-version }}
- name: Install uv
uses: astral-sh/setup-uv@d31148d669074a8d0a63714ba94f3201e7020bc3 # v8.3.0
- name: Install dependencies
run: |
uv sync --extra everything --dev
- name: Run ruff
run: |
uv run ruff check --output-format=github src/ tests/
- name: Run unit tests with coverage
run: |
uv run pytest --cov=powerapi --cov-report=term --cov-report=xml tests/unit
- name: Upload coverage reports to Codecov
uses: codecov/codecov-action@fb8b3582c8e4def4969c97caa2f19720cb33a72f # v7.0.0
with:
token: ${{ secrets.CODECOV_TOKEN }}
build-container-image:
name: Build container image
runs-on: ubuntu-latest
steps:
- name: Setup Docker buildx
uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0
- name: Build image
uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0
with:
push: false
provenance: false
load: true
tags: localbuild/powerapi:sha-${{ github.sha }}
build-args: |
POWERAPI_INSTALL_METHOD=local
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 on: push: branches: ["master"] pull_request: branches: ["master"] permissions: contents: read concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: run-tests: timeout-minutes: 30 name: Run linters and unit tests runs-on: latchkey-small strategy: matrix: python-version: ["3.12", "3.x"] steps: - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0 - name: Set up Python ${{ matrix.python-version }} uses: actions/setup-python@ece7cb06caefa5fff74198d8649806c4678c61a1 # v6.3.0 with: cache: 'pip' python-version: ${{ matrix.python-version }} - name: Install uv uses: astral-sh/setup-uv@d31148d669074a8d0a63714ba94f3201e7020bc3 # v8.3.0 - name: Install dependencies run: | uv sync --extra everything --dev - name: Run ruff run: | uv run ruff check --output-format=github src/ tests/ - name: Run unit tests with coverage run: | uv run pytest --cov=powerapi --cov-report=term --cov-report=xml tests/unit - name: Upload coverage reports to Codecov uses: codecov/codecov-action@fb8b3582c8e4def4969c97caa2f19720cb33a72f # v7.0.0 with: token: ${{ secrets.CODECOV_TOKEN }} build-container-image: timeout-minutes: 30 name: Build container image runs-on: latchkey-small steps: - name: Setup Docker buildx uses: docker/setup-buildx-action@bb05f3f5519dd87d3ba754cc423b652a5edd6d2c # v4.2.0 - name: Build image uses: docker/build-push-action@53b7df96c91f9c12dcc8a07bcb9ccacbed38856a # v7.3.0 with: push: false provenance: false load: true tags: localbuild/powerapi:sha-${{ github.sha }} build-args: | POWERAPI_INSTALL_METHOD=local
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 useslatchkey-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.
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:
- Container pulls and builds
This workflow runs 2 jobs (3 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.