lint_tests workflow (gordicaleksa/Open-NLLB)

The lint_tests workflow from gordicaleksa/Open-NLLB, explained and optimized by Latchkey.

CI health: D - needs work

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Source: gordicaleksa/Open-NLLB.github/workflows/lint.ymlLicense MITView source

What it does

This is the lint_tests workflow from the gordicaleksa/Open-NLLB 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: lint_tests

on:
  # Trigger the workflow on push to main or any pull request
  push:
    branches:
      - main
  pull_request:

jobs:
  build:

    strategy:
      max-parallel: 1
      matrix:
        platform: [ubuntu-latest]
        python-version: [3.8]

    runs-on: ${{ matrix.platform }}

    steps:
    - uses: actions/checkout@v2

    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        python-version: ${{ matrix.python-version }}

    - name: Install locally
      run: |
        python -m pip install --upgrade pip
        git submodule update --init --recursive
        python setup.py build_ext --inplace
        python -m pip install --editable '.[dev]'

    - name: Lint with flake8
      run: |
        # stop the build if there are Python syntax errors or undefined names
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --extend-exclude fairseq/model_parallel/megatron
        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics --extend-exclude fairseq/model_parallel/megatron

    - name: Lint with black
      run: |
        pip install black
        black --check . --extend-exclude 'examples|fairseq\/model_parallel\/megatron'

The same workflow, on Latchkey

Estimated ~20% faster on cache hits, plus fewer wasted runs and a safer supply chain. Added and changed lines are highlighted.

name: lint_tests
 
on:
  # Trigger the workflow on push to main or any pull request
  push:
    branches:
      - main
  pull_request:
 
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true
 
jobs:
  build:
    timeout-minutes: 30
 
    strategy:
      max-parallel: 1
      matrix:
        platform: [ubuntu-latest]
        python-version: [3.8]
 
    runs-on: ${{ matrix.platform }}
 
    steps:
    - uses: actions/checkout@v2
 
    - name: Set up Python ${{ matrix.python-version }}
      uses: actions/setup-python@v2
      with:
        cache: 'pip'
        python-version: ${{ matrix.python-version }}
 
    - name: Install locally
      run: |
        python -m pip install --upgrade pip
        git submodule update --init --recursive
        python setup.py build_ext --inplace
        python -m pip install --editable '.[dev]'
 
    - name: Lint with flake8
      run: |
        # stop the build if there are Python syntax errors or undefined names
        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics --extend-exclude fairseq/model_parallel/megatron
        # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics --extend-exclude fairseq/model_parallel/megatron
 
    - name: Lint with black
      run: |
        pip install black
        black --check . --extend-exclude 'examples|fairseq\/model_parallel\/megatron'

What changed

Cancel superseded runs when a branch or PR gets a newer push.
Cache dependency installs on the setup step so they are served from cache.
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 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