Label PRs from globs workflow (jaredpalmer/razzle)

The Label PRs from globs workflow from jaredpalmer/razzle, explained and optimized by Latchkey.

CI health: B - good

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Source: jaredpalmer/razzle.github/workflows/label.ymlLicense MITView source

What it does

This is the Label PRs from globs workflow from the jaredpalmer/razzle 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)

# Automatically label PRs every hour based on your .github/labels.yaml:
#
# This workflow will triage pull requests and apply a label based on the
# paths that are modified in the pull request.
#
# To use this workflow, you will need to set up a .github/labeler.yml
# file with configuration.  For more information, see:
# https://github.com/actions/labeler/blob/master/README.md

name: "Label PRs from globs"
on:
  schedule:
  - cron: "0 1 * * *"

jobs:
  execute:
    runs-on: ubuntu-latest
    steps:
      - name: Label PRs
        uses: jpmcb/prow-github-actions@v1.0.0
        with:
          jobs: 'pr-labeler'
          github-token: "${{ secrets.GITHUB_TOKEN }}"

The same workflow, on Latchkey

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

# Automatically label PRs every hour based on your .github/labels.yaml:
#
# This workflow will triage pull requests and apply a label based on the
# paths that are modified in the pull request.
#
# To use this workflow, you will need to set up a .github/labeler.yml
# file with configuration.  For more information, see:
# https://github.com/actions/labeler/blob/master/README.md
 
name: "Label PRs from globs"
on:
  schedule:
  - cron: "0 1 * * *"
 
jobs:
  execute:
    timeout-minutes: 30
    runs-on: latchkey-small
    steps:
      - name: Label PRs
        uses: jpmcb/prow-github-actions@v1.0.0
        with:
          jobs: 'pr-labeler'
          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.