Build-Test-Multi-Scipy-Numpy workflow (CalebBell/ht)

The Build-Test-Multi-Scipy-Numpy workflow from CalebBell/ht, explained and optimized by Latchkey.

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Source: CalebBell/ht.github/workflows/build_multi_numpy_scipy.ymlLicense MITView source

What it does

This is the Build-Test-Multi-Scipy-Numpy workflow from the CalebBell/ht 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: Build-Test-Multi-Scipy-Numpy
on:
  push:
    branches: [release]
  pull_request:
    branches: [master, release]

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/master' && github.ref != 'refs/heads/release' }}

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        numpy: ['2.0.1'] #['1.16.5', '1.18.5', '1.20.3', '1.22.4', '1.24.4', '1.26.4', '2.0.1']
        scipy: ['1.14.0'] #['1.7.3', '1.8.1', '1.9.3', '1.10.1', '1.12.0', '1.14.0']
        python-version: ['3.10'] #['3.7', '3.8', '3.9', '3.10']
        os: [ubuntu-latest]
        architecture: ['x64']
        include:
          - numpy: '1.24.4'
            scipy: '1.9.3'
            python-version: '3.10'
          - numpy: '1.24.4'
            scipy: '1.12.0'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.10.1'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.12.0'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.14.0'
            python-version: '3.10'
          - numpy: '2.0.1'
            scipy: '1.14.0'
            python-version: '3.10'
    steps:
    - uses: actions/checkout@v4
    - name: Install uv
      uses: astral-sh/setup-uv@v4
      with:
        enable-cache: true
        cache-dependency-glob: "pyproject.toml"
    - name: Install Just
      uses: extractions/setup-just@v2
    - name: Run tests with specific Python/NumPy/SciPy versions
      run: just test-multi-single ${{ matrix.python-version }} ${{ matrix.numpy }} ${{ matrix.scipy }}

The same workflow, on Latchkey

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

name: Build-Test-Multi-Scipy-Numpy
on:
  push:
    branches: [release]
  pull_request:
    branches: [master, release]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: ${{ github.ref != 'refs/heads/master' && github.ref != 'refs/heads/release' }}
 
jobs:
  build:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      fail-fast: false
      matrix:
        numpy: ['2.0.1'] #['1.16.5', '1.18.5', '1.20.3', '1.22.4', '1.24.4', '1.26.4', '2.0.1']
        scipy: ['1.14.0'] #['1.7.3', '1.8.1', '1.9.3', '1.10.1', '1.12.0', '1.14.0']
        python-version: ['3.10'] #['3.7', '3.8', '3.9', '3.10']
        os: [ubuntu-latest]
        architecture: ['x64']
        include:
          - numpy: '1.24.4'
            scipy: '1.9.3'
            python-version: '3.10'
          - numpy: '1.24.4'
            scipy: '1.12.0'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.10.1'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.12.0'
            python-version: '3.9'
          - numpy: '1.26.4'
            scipy: '1.14.0'
            python-version: '3.10'
          - numpy: '2.0.1'
            scipy: '1.14.0'
            python-version: '3.10'
    steps:
    - uses: actions/checkout@v4
    - name: Install uv
      uses: astral-sh/setup-uv@v4
      with:
        enable-cache: true
        cache-dependency-glob: "pyproject.toml"
    - name: Install Just
      uses: extractions/setup-just@v2
    - name: Run tests with specific Python/NumPy/SciPy versions
      run: just test-multi-single ${{ matrix.python-version }} ${{ matrix.numpy }} ${{ matrix.scipy }}

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 uses latchkey-small; pick the runner size that fits the job.
Add a job timeout so a hung step cannot burn hours of runner time.

2 third-party actions are referenced by a movable tag. Pin them to the commit SHA (Latchkey resolves and applies this automatically) so a repointed tag cannot change what runs.

This workflow runs 1 job 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 astral-sh/setup-uv