pr-labeler.yaml

# Copyright 2025 The Cirq Developers
#
# 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
#
#     https://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.

# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Label PRs with labels such as size.
#
# This workflow is designed not to fail if labeling actions encounter errors;
# instead, the actions write annotations on the workflow run summary page. If
# labels don't seem to be getting applied as expected, check there for errors.
# ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

name: Pull request labeler
run-name: >-
  Label pull request ${{github.event.pull_request.number}} by ${{github.actor}}

on:
  pull_request:
    types:
      - opened
      - synchronize

  # Allow manual invocation.
  workflow_dispatch:

# Declare default permissions as read only.
permissions: read-all

jobs:
  label-pr-size:
    name: Update PR size labels
    runs-on: ubuntu-24.04
    permissions:
      contents: read
      pull-requests: write
      issues: write
    steps:
      # We need a copy of the repo so the action can read the config file.
      - name: Check out a copy of the git repository
        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2

      - name: Label the PR with a size label
        id: label
        continue-on-error: true
        run: |
          set -x +e
          podman --out action.out run -v .github:/tmp/.github --rm -it \
            ghcr.io/cbrgm/pr-size-labeler-action:v1 \
            --githubtoken ${{secrets.PR_LABELER_TOKEN}} \
            --eventname pull_request \
            --reponame ${{github.repository}} \
            --prnumber ${{github.event.number}} \
            --configfilepath /tmp/.github/pr-size-labels.yaml
          status=$?
          echo '::group::Labeler action output'
          cat action.out
          echo '::endgroup::'
          exit $status

      - name: Detect and report errors in labeler action
        if: steps.label.outcome == 'failure' || steps.label.outcome == 'error'
        run: |
          {
          echo "<h4>‼️ Failed to label PR ${{github.event.number}}</h4>"
          echo "<pre>"
          cat action.out
          echo "</pre>"
          } >> "$GITHUB_STEP_SUMMARY"