This action checks if any of the currently open PRs (excluding the current PR if this action runs for a PR) in the current repository contain any of the given labels.

Use case

We want to deploy any PR with the deploy label to the test environment, except if there is already an open PR with the deploy label.

Usage example

Terminate workflow if there is a PR with a given label

jobs:
  test:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      
      - name: Check if there is a PR with the 'deploy' label
        id: has-label
        uses: unitedwardrobe/gha-has-label@main
        with:
          token: ${{ secrets.GITHUB_TOKEN }}
          labels: deploy

      - name: Stop if 'deploy' PR exists
        if: ${{ steps.has-label.outputs.result == 'true' }}
        run: exit 1

At the time of writing there doesn't seem to be a nice way to gracefully halt a workflow without marking it "failed". See here.

Only run step if there are no PRs with a given label

jobs:
  test:
    - name: Check if there is a PR with the 'deploy' label
      id: has-label
      uses: unitedwardrobe/gha-has-label@main
      with:
        token: ${{ secrets.GITHUB_TOKEN }}
        labels: deploy
          
    - name: Run if there are no PRs with given label
      if: ${{ steps.has-label.outputs.result == 'false' }}
      run: someCommand

Created with https://github.com/actions/typescript-action

Working in this repository

After updating code, run npm run all to build the new version.