Continuous Integration - Static Type Checking workflow (colour-science/colour)
The Continuous Integration - Static Type Checking workflow from colour-science/colour, explained and optimized by Latchkey.
CI health: D - needs work
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Grade your own workflow free or run it on Latchkey →What it does
This is the Continuous Integration - Static Type Checking workflow from the colour-science/colour 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: Continuous Integration - Static Type Checking
on: [push, pull_request]
jobs:
continuous-integration-static-type-checking:
name: ${{ matrix.os }} - Python ${{ matrix.python-version }}
strategy:
matrix:
os: [macOS-latest]
python-version: [3.13]
fail-fast: false
runs-on: ${{ matrix.os }}
steps:
- uses: actions/checkout@v4
- name: Environment Variables
run: |
echo "CI_PACKAGE=colour" >> $GITHUB_ENV
shell: bash
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@v5
with:
python-version: ${{ matrix.python-version }}
- name: Install Dependencies (macOS)
if: matrix.os == 'macOS-latest'
run: |
brew install freeimage graphviz
pip install --no-cache-dir --config-settings="--global-option=build_ext" --config-settings="--global-option=-I$(brew --prefix graphviz)/include/" --config-settings="--global-option=-L$(brew --prefix graphviz)/lib/" pygraphviz
# TODO: Drop when https://github.com/imageio/imageio/issues/628 is addressed
echo "IMAGEIO_FREEIMAGE_LIB=/opt/homebrew/Cellar/freeimage/3.18.0/lib/libfreeimage.3.18.0.dylib" >> $GITHUB_ENV
- name: Install Package Dependencies
run: |
cat requirements.txt | grep -Eo '(^[^#]+)' | xargs -n 1 pip install || true
- name: Static Type Checking
run: |
pyright --threads --skipunannotated
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: Continuous Integration - Static Type Checking on: [push, pull_request] concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: continuous-integration-static-type-checking: timeout-minutes: 30 name: ${{ matrix.os }} - Python ${{ matrix.python-version }} strategy: matrix: os: [macOS-latest] python-version: [3.13] fail-fast: false runs-on: ${{ matrix.os }} steps: - uses: actions/checkout@v4 - name: Environment Variables run: | echo "CI_PACKAGE=colour" >> $GITHUB_ENV shell: bash - name: Set up Python ${{ matrix.python-version }} uses: actions/setup-python@v5 with: cache: 'pip' python-version: ${{ matrix.python-version }} - name: Install Dependencies (macOS) if: matrix.os == 'macOS-latest' run: | brew install freeimage graphviz pip install --no-cache-dir --config-settings="--global-option=build_ext" --config-settings="--global-option=-I$(brew --prefix graphviz)/include/" --config-settings="--global-option=-L$(brew --prefix graphviz)/lib/" pygraphviz # TODO: Drop when https://github.com/imageio/imageio/issues/628 is addressed echo "IMAGEIO_FREEIMAGE_LIB=/opt/homebrew/Cellar/freeimage/3.18.0/lib/libfreeimage.3.18.0.dylib" >> $GITHUB_ENV - name: Install Package Dependencies run: | cat requirements.txt | grep -Eo '(^[^#]+)' | xargs -n 1 pip install || true - name: Static Type Checking run: | pyright --threads --skipunannotated
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 per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.