.github/workflows/freeze.yml

# Copyright 2013 The Flutter Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

name: Material and Cupertino Code Freeze

on:
  pull_request_target:
    types: [opened, reopened, synchronize, ready_for_review, labeled, unlabeled]
    branches:
      - master
  merge_group:
    branches:
      - master

permissions: read-all

jobs:
  check_freeze:
    name: Check Code Freeze
    runs-on: ubuntu-latest
    if: ${{ github.repository == 'flutter/flutter' }}
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Check for changes in frozen folders
        uses: dorny/paths-filter@v3
        id: filter
        with:
          filters: |
            frozen:
              - 'packages/flutter/lib/src/material/**'
              - 'packages/flutter/lib/src/cupertino/**'
              - 'packages/flutter/test/material/**'
              - 'packages/flutter/test/cupertino/**'
              - 'examples/api/lib/material/**'
              - 'examples/api/lib/cupertino/**'
              - 'examples/api/test/material/**'
              - 'examples/api/test/cupertino/**'
              - 'packages/flutter/lib/fix_data/fix_cupertino.yaml'
              - 'packages/flutter/lib/fix_data/fix_material/**'
              - 'packages/flutter/test_fixes/material/**'
              - 'packages/flutter/test_fixes/cupertino/**'

      - name: Fail on frozen changes
        # This step only runs if the 'frozen' filter matched AND the override label is NOT present
        if: |
          steps.filter.outputs.frozen == 'true' &&
          !contains(github.event.pull_request.labels.*.name, 'override: code freeze')
        run: |
          echo "Error: Code changes detected during the current code freeze."
          echo "The following paths are currently frozen:"
          echo "  - packages/flutter/lib/src/material/"
          echo "  - packages/flutter/lib/src/cupertino/"
          echo "  - (and associated tests/examples)"
          echo ""
          echo "If this is a critical fix that must land during the freeze, please file an issue for team-design."
          echo "Information on this code freeze: https://github.com/flutter/flutter/issues/184093"
          exit 1

      - name: Pass if overridden
        if: |
          steps.filter.outputs.frozen == 'true' &&
          contains(github.event.pull_request.labels.*.name, 'override: code freeze')
        run: echo "Code freeze overridden by override: code freeze label."

      - name: Pass if no frozen changes
        if: steps.filter.outputs.frozen == 'false'
        run: echo "No changes to frozen code."