conda-build (NumPy v2) workflow (QuantEcon/QuantEcon.py)

The conda-build (NumPy v2) workflow from QuantEcon/QuantEcon.py, explained and optimized by Latchkey.

CI health: C - fair

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Source: QuantEcon/QuantEcon.py.github/workflows/ci_np2.ymlLicense MITView source

What it does

This is the conda-build (NumPy v2) workflow from the QuantEcon/QuantEcon.py 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: conda-build (NumPy v2)

on:
  push:
  pull_request:
    branches: [ $default-branch ]

jobs:
  tests:
    runs-on: ubuntu-latest
    strategy:
      max-parallel: 5

    steps:
    - uses: actions/checkout@v7
    - uses: conda-incubator/setup-miniconda@v4
      with:
        auto-update-conda: true
        environment-file: environment_np2.yml
        python-version: '3.14'
    - name: Conda info
      shell: bash -l {0}
      run: |
        conda info
        conda list
    - name: Test with pytest
      shell: bash -l {0}
      run: |
        conda install pytest
        pytest

The same workflow, on Latchkey

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

name: conda-build (NumPy v2)
 
on:
  push:
  pull_request:
    branches: [ $default-branch ]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  tests:
    timeout-minutes: 30
    runs-on: latchkey-small
    strategy:
      max-parallel: 5
 
    steps:
    - uses: actions/checkout@v7
    - uses: conda-incubator/setup-miniconda@v4
      with:
        auto-update-conda: true
        environment-file: environment_np2.yml
        python-version: '3.14'
    - name: Conda info
      shell: bash -l {0}
      run: |
        conda info
        conda list
    - name: Test with pytest
      shell: bash -l {0}
      run: |
        conda install pytest
        pytest

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.
Cancel superseded runs when a branch or PR gets a newer push.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.

1 third-party action is referenced by a movable tag. Pin it 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