CI workflow (replicate/replicate-python)

The CI workflow from replicate/replicate-python, explained and optimized by Latchkey.

What it does

This is the CI workflow from the replicate/replicate-python repository, a real project running GitHub Actions. It is shown here with attribution under its Apache-2.0 license.

Below, Latchkey shows a faster, safer version produced by its optimization engine.

The workflow

name: CI

on:
  push:
    branches: ["main"]

  pull_request:
    branches: ["main"]

jobs:
  test:
    runs-on: ubuntu-latest

    name: "Test Python ${{ matrix.python-version }}"

    env:
      REPLICATE_API_TOKEN: ${{ secrets.REPLICATE_API_TOKEN }}

    timeout-minutes: 10

    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]

    defaults:
      run:
        shell: bash

    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          enable-cache: true

      - name: Setup
        run: ./script/setup

      - name: Test
        run: ./script/test

      - name: Lint
        run: ./script/lint
        

The same workflow, on Latchkey

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

name: CI
 
on:
  push:
    branches: ["main"]
 
  pull_request:
    branches: ["main"]
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  test:
    runs-on: latchkey-small
 
    name: "Test Python ${{ matrix.python-version }}"
 
    env:
      REPLICATE_API_TOKEN: ${{ secrets.REPLICATE_API_TOKEN }}
 
    timeout-minutes: 10
 
    strategy:
      fail-fast: false
      matrix:
        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
 
    defaults:
      run:
        shell: bash
 
    steps:
      - uses: actions/checkout@v4
      - uses: astral-sh/setup-uv@v5
        with:
          enable-cache: true
 
      - name: Setup
        run: ./script/setup
 
      - name: Test
        run: ./script/test
 
      - name: Lint
        run: ./script/lint
        
 

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• Cancel superseded runs when a branch or PR gets a newer push.

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 (5 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