check_duplicate_prs workflow (stdlib-js/stdlib)

The check_duplicate_prs workflow from stdlib-js/stdlib, explained and optimized by Latchkey.

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Source: stdlib-js/stdlib.github/workflows/check_duplicate_prs.ymlLicense Apache-2.0View source

What it does

This is the check_duplicate_prs workflow from the stdlib-js/stdlib 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

workflow (.yml)

#/
# @license Apache-2.0
#
# Copyright (c) 2025 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#/

# Workflow name:
name: check_duplicate_prs

# Workflow triggers:
on:
  # Run the workflow daily at 3 AM UTC:
  schedule:
    - cron: '0 3 * * *'

  # Allow the workflow to be manually run:
  workflow_dispatch:
    inputs:
      debug:
        description: 'Enable debug output'
        required: false
        default: 'false'
        type: choice
        options:
          - 'true'
          - 'false'

# Global permissions:
permissions:
  # Allow read-only access to the repository contents:
  contents: read

# Workflow jobs:
jobs:

  # Define a job for checking duplicate PRs...
  check_duplicates:

    # Define a display name:
    name: 'Check Duplicate PRs'

    # Ensure the job does not run on forks:
    if: github.repository == 'stdlib-js/stdlib'

    # Define the type of virtual host machine:
    runs-on: ubuntu-latest

    # Define the sequence of job steps...
    steps:
      # Checkout the repository:
      - name: 'Checkout repository'
        # Pin action to full length commit SHA
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          # Ensure we have access to the scripts directory:
          sparse-checkout: |
            .github/workflows/scripts
          sparse-checkout-cone-mode: false
        timeout-minutes: 10

      # Check for duplicate PRs:
      - name: 'Check for duplicate PRs'
        env:
          GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          DEBUG: ${{ inputs.debug || 'false' }}
        run: |
          . "$GITHUB_WORKSPACE/.github/workflows/scripts/check_duplicate_prs/run"
        timeout-minutes: 15

The same workflow, on Latchkey

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

#/
# @license Apache-2.0
#
# Copyright (c) 2025 The Stdlib Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#    http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#/
 
# Workflow name:
name: check_duplicate_prs
 
# Workflow triggers:
on:
  # Run the workflow daily at 3 AM UTC:
  schedule:
    - cron: '0 3 * * *'
 
  # Allow the workflow to be manually run:
  workflow_dispatch:
    inputs:
      debug:
        description: 'Enable debug output'
        required: false
        default: 'false'
        type: choice
        options:
          - 'true'
          - 'false'
 
# Global permissions:
permissions:
  # Allow read-only access to the repository contents:
  contents: read
 
# Workflow jobs:
jobs:
 
  # Define a job for checking duplicate PRs...
  check_duplicates:
    timeout-minutes: 30
 
    # Define a display name:
    name: 'Check Duplicate PRs'
 
    # Ensure the job does not run on forks:
    if: github.repository == 'stdlib-js/stdlib'
 
    # Define the type of virtual host machine:
    runs-on: latchkey-small
 
    # Define the sequence of job steps...
    steps:
      # Checkout the repository:
      - name: 'Checkout repository'
        # Pin action to full length commit SHA
        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          # Ensure we have access to the scripts directory:
          sparse-checkout: |
            .github/workflows/scripts
          sparse-checkout-cone-mode: false
        timeout-minutes: 10
 
      # Check for duplicate PRs:
      - name: 'Check for duplicate PRs'
        env:
          GITHUB_TOKEN: ${{ secrets.STDLIB_BOT_PAT_REPO_WRITE }}
          DEBUG: ${{ inputs.debug || 'false' }}
        run: |
          . "$GITHUB_WORKSPACE/.github/workflows/scripts/check_duplicate_prs/run"
        timeout-minutes: 15

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.

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