PR workflow (snakemake/snakemake)

The PR workflow from snakemake/snakemake, explained and optimized by Latchkey.

What it does

This is the PR workflow from the snakemake/snakemake 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: PR
on:
  pull_request_target:
    types:
      - opened
      - reopened
      - edited
      - synchronize

permissions:
  contents: read

jobs:
  title-format:
    permissions:
      pull-requests: read  # for amannn/action-semantic-pull-request to analyze PRs
      statuses: write  # for amannn/action-semantic-pull-request to mark status of analyzed PR
    runs-on: ubuntu-latest
    steps:
      - uses: amannn/action-semantic-pull-request@v6
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

The same workflow, on Latchkey

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

name: PR
on:
  pull_request_target:
    types:
      - opened
      - reopened
      - edited
      - synchronize
 
permissions:
  contents: read
 
jobs:
  title-format:
    timeout-minutes: 30
    permissions:
      pull-requests: read  # for amannn/action-semantic-pull-request to analyze PRs
      statuses: write  # for amannn/action-semantic-pull-request to mark status of analyzed PR
    runs-on: latchkey-small
    steps:
      - uses: amannn/action-semantic-pull-request@v6
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 

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.

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