block-merge.yml

# Copyright 2021 Google LLC
#
# 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.

# Adapted from https://github.com/cclauss/autoblack

name: Block Merge
on:
  pull_request:
    types: [labeled, unlabeled]

permissions:
  checks: write
  pull-requests: read

jobs:
  check-label:
    runs-on: ubuntu-latest
    steps:
      - name: Check Labels
        uses: actions/github-script@60a0d83039c74a4aee543508d2ffcb1c3799cdea # v7
        with:
          script: |
            const labels = context.payload.pull_request.labels;
            const labels_included = labels.filter((label) => {
              return label.name.includes('do not merge') || label.name.includes('needs');
            })
            if (labels_included.length > 0) {
              const names = labels_included.map(label => label.name);
              const errors = names.join(', ');
              core.setFailed(`PR has labels: ${errors} - blocking merge`);
            } else {
              core.info('No blocking labels');
            }