Test Legacy Python Versions workflow (hakancelikdev/unimport)
The Test Legacy Python Versions workflow from hakancelikdev/unimport, explained and optimized by Latchkey.
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Grade your own workflow free or run it on Latchkey →What it does
This is the Test Legacy Python Versions workflow from the hakancelikdev/unimport 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: Test Legacy Python Versions
on: [push, pull_request]
jobs:
test-legacy:
name: Test Legacy Python ${{ matrix.python-version }} on ${{ matrix.os }}
runs-on: ${{ matrix.os }}
strategy:
fail-fast: false
matrix:
os: [ubuntu-latest, windows-latest]
python-version: ["3.9", "3.10"]
steps:
- name: Checkout code
uses: actions/checkout@v4
with:
fetch-depth: 0
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@v5
with:
python-version: ${{ matrix.python-version }}
architecture: x64
cache: "pip"
- name: Cache pip dependencies
uses: actions/cache@v4
with:
path: ~/.cache/pip
key:
${{ runner.os }}-pip-${{ matrix.python-version }}-${{
hashFiles('**/pyproject.toml') }}
restore-keys: |
${{ runner.os }}-pip-${{ matrix.python-version }}-
- name: Install dependencies
run: |
python -m pip install --upgrade pip
python -m pip install tox
- name: Run tests with tox
run: tox -e ${{ matrix.python-version }}
timeout-minutes: 10
test-legacy-macos:
name: Test Legacy Python ${{ matrix.python-version }} on macOS
runs-on: macos-latest
strategy:
fail-fast: false
matrix:
python-version: ["3.9", "3.10"]
steps:
- name: Checkout code
uses: actions/checkout@v4
with:
fetch-depth: 0
- name: Set up Python ${{ matrix.python-version }}
uses: actions/setup-python@v5
with:
python-version: ${{ matrix.python-version }}
# No architecture specified for macOS with Python <3.11 to avoid arm64 issues
cache: "pip"
- name: Cache pip dependencies
uses: actions/cache@v4
with:
path: ~/.cache/pip
key:
${{ runner.os }}-pip-${{ matrix.python-version }}-${{
hashFiles('**/pyproject.toml') }}
restore-keys: |
${{ runner.os }}-pip-${{ matrix.python-version }}-
- name: Install dependencies
run: |
python -m pip install --upgrade pip
python -m pip install tox
- name: Run tests with tox
run: tox -e ${{ matrix.python-version }}
timeout-minutes: 10
The same workflow, on Latchkey
Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.
name: Test Legacy Python Versions on: [push, pull_request] concurrency: group: ${{ github.workflow }}-${{ github.ref }} cancel-in-progress: true jobs: test-legacy: timeout-minutes: 30 name: Test Legacy Python ${{ matrix.python-version }} on ${{ matrix.os }} runs-on: ${{ matrix.os }} strategy: fail-fast: false matrix: os: [ubuntu-latest, windows-latest] python-version: ["3.9", "3.10"] steps: - name: Checkout code uses: actions/checkout@v4 with: fetch-depth: 0 - name: Set up Python ${{ matrix.python-version }} uses: actions/setup-python@v5 with: python-version: ${{ matrix.python-version }} architecture: x64 cache: "pip" - name: Cache pip dependencies uses: actions/cache@v4 with: path: ~/.cache/pip key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/pyproject.toml') }} restore-keys: | ${{ runner.os }}-pip-${{ matrix.python-version }}- - name: Install dependencies run: | python -m pip install --upgrade pip python -m pip install tox - name: Run tests with tox run: tox -e ${{ matrix.python-version }} timeout-minutes: 10 test-legacy-macos: timeout-minutes: 30 name: Test Legacy Python ${{ matrix.python-version }} on macOS runs-on: macos-latest strategy: fail-fast: false matrix: python-version: ["3.9", "3.10"] steps: - name: Checkout code uses: actions/checkout@v4 with: fetch-depth: 0 - name: Set up Python ${{ matrix.python-version }} uses: actions/setup-python@v5 with: python-version: ${{ matrix.python-version }} # No architecture specified for macOS with Python <3.11 to avoid arm64 issues cache: "pip" - name: Cache pip dependencies uses: actions/cache@v4 with: path: ~/.cache/pip key: ${{ runner.os }}-pip-${{ matrix.python-version }}-${{ hashFiles('**/pyproject.toml') }} restore-keys: | ${{ runner.os }}-pip-${{ matrix.python-version }}- - name: Install dependencies run: | python -m pip install --upgrade pip python -m pip install tox - name: Run tests with tox run: tox -e ${{ matrix.python-version }} timeout-minutes: 10
What changed
- Cancel superseded runs when a branch or PR gets a newer push.
- 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 2 jobs (6 with the matrix expanded) per trigger. On Latchkey the same minutes cost up to 58% less than GitHub-hosted, with zero queue time.