Python package workflow (unoconv/unoserver)

The Python package workflow from unoconv/unoserver, explained and optimized by Latchkey.

What it does

This is the Python package workflow from the unoconv/unoserver 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

# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions

name: Python package

on:
  push:
    branches: [ '**' ]
  pull_request:
    branches: [ master ]

jobs:
  build:

    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-22.04, ubuntu-24.04]
      fail-fast: true
    steps:
    - uses: actions/checkout@v4
    - name: Install Package
      run: |
        python -m pip install virtualenv
        make devenv
    - name: Check styles
      run: |
        make check
    - name: Install Libreoffice
      run: |
        sudo apt-get update
        sudo apt-get install libreoffice
    - name: Test with pytest
      run: |
        source ve/bin/activate
        pytest -s

The same workflow, on Latchkey

Removes redundant runs and caps runaway jobs. Added and changed lines are highlighted.

# This workflow will install Python dependencies, run tests and lint with a variety of Python versions
# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
 
name: Python package
 
on:
  push:
    branches: [ '**' ]
  pull_request:
    branches: [ master ]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
 
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-22.04, ubuntu-24.04]
      fail-fast: true
    steps:
    - uses: actions/checkout@v4
    - name: Install Package
      run: |
        python -m pip install virtualenv
        make devenv
    - name: Check styles
      run: |
        make check
    - name: Install Libreoffice
      run: |
        sudo apt-get update
        sudo apt-get install libreoffice
    - name: Test with pytest
      run: |
        source ve/bin/activate
        pytest -s
 

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• Cancel superseded runs when a branch or PR gets a newer push.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 1 job (2 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