No important files changed workflow (exercism/python)

The No important files changed workflow from exercism/python, explained and optimized by Latchkey.

What it does

This is the No important files changed workflow from the exercism/python 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

name: No important files changed

on:
  pull_request_target:
    types: [opened]
    branches: [main]
    paths:
      - "exercises/concept/**"
      - "exercises/practice/**"
      - "!exercises/*/*/.approaches/**"
      - "!exercises/*/*/.articles/**"
      - "!exercises/*/*/.docs/**"
      - "!exercises/*/*/.meta/**"

permissions:
  pull-requests: write

jobs:
  check:
    uses: exercism/github-actions/.github/workflows/check-no-important-files-changed.yml@main
    with:
      repository: ${{ github.event.pull_request.head.repo.owner.login }}/${{ github.event.pull_request.head.repo.name }}
      ref: ${{ github.head_ref }}

The same workflow, on Latchkey

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

name: No important files changed
 
on:
  pull_request_target:
    types: [opened]
    branches: [main]
    paths:
      - "exercises/concept/**"
      - "exercises/practice/**"
      - "!exercises/*/*/.approaches/**"
      - "!exercises/*/*/.articles/**"
      - "!exercises/*/*/.docs/**"
      - "!exercises/*/*/.meta/**"
 
permissions:
  pull-requests: write
 
jobs:
  check:
    timeout-minutes: 30
    uses: exercism/github-actions/.github/workflows/check-no-important-files-changed.yml@main
    with:
      repository: ${{ github.event.pull_request.head.repo.owner.login }}/${{ github.event.pull_request.head.repo.name }}
      ref: ${{ github.head_ref }}
 

What changed

• 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.