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Regression and Version Tests workflow (pmorissette/bt)

The Regression and Version Tests workflow from pmorissette/bt, explained and optimized by Latchkey.

A

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Source: pmorissette/bt.github/workflows/regression.yamlLicense MITView source

What it does

This is the Regression and Version Tests workflow from the pmorissette/bt 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: Regression and Version Tests

on:
  push:
    branches:
      - master
  pull_request:
  workflow_dispatch:

concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true

jobs:
  build:
    runs-on: ${{ matrix.os }}
    environment: dev

    strategy:
      matrix:
        python-version:
          - 3.11
        os:
          - ubuntu-latest
        pandas_version:
          - '>=1,<2'
          - '>=2,<3'
          - '>=3,<4'
        numpy_version:
          - '<2'
          - '>=2'
        exclude:
          - numpy_version: '>=2'
            pandas_version: '>=1,<2'

    steps:
    - name: Checkout
      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 }}
        cache: 'pip'
        cache-dependency-path: 'pyproject.toml'

    - name: Install dependencies
      run: make develop

    - name: Install specific pandas and numpy versions
      run: pip install "pandas${{ matrix.pandas_version }}" "numpy${{ matrix.numpy_version }}"

    - name: Test
      run: make test

The same workflow, on Latchkey

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

name: Regression and Version Tests
 
on:
  push:
    branches:
      - master
  pull_request:
  workflow_dispatch:
 
concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: ${{ matrix.os }}
    environment: dev
 
    strategy:
      matrix:
        python-version:
          - 3.11
        os:
          - ubuntu-latest
        pandas_version:
          - '>=1,<2'
          - '>=2,<3'
          - '>=3,<4'
        numpy_version:
          - '<2'
          - '>=2'
        exclude:
          - numpy_version: '>=2'
            pandas_version: '>=1,<2'
 
    steps:
    - name: Checkout
      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 }}
        cache: 'pip'
        cache-dependency-path: 'pyproject.toml'
 
    - name: Install dependencies
      run: make develop
 
    - name: Install specific pandas and numpy versions
      run: pip install "pandas${{ matrix.pandas_version }}" "numpy${{ matrix.numpy_version }}"
 
    - name: Test
      run: make test

What changed

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:

This workflow runs 1 job (6 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

actions/checkout actions/setup-python