.github/workflows/sync-protos.yml

# Copyright (C) 2025 The Android Open Source Project
#
# 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.

name: Sync generated proto files

on:
  schedule:
    # Run every day at 2 AM UTC
    - cron: '0 2 * * *'
  workflow_dispatch:  # Allow manual triggering

permissions:
  contents: write  # Needed to push branch for PR
  pull-requests: write  # Needed to create PR

jobs:
  sync-protos:
    runs-on: self-hosted
    timeout-minutes: 60
    steps:
      - name: Checkout repository
        uses: actions/checkout@v4
        with:
          ref: main  # Always use main branch
          fetch-depth: 0

      - uses: ./.github/actions/install-build-deps

      - name: Setup build directory
        run: |
          tools/gn gen out/proto_sync --args="is_debug=false"

      - name: Generate proto files
        run: |
          tools/gen_all --protos out/proto_sync

      - name: Check for changes
        id: check_changes
        run: |
          # Check if there are any changes in generated proto files
          if [ -n "$(git status --porcelain)" ]; then
            echo "has_changes=true" >> $GITHUB_OUTPUT
          else
            echo "has_changes=false" >> $GITHUB_OUTPUT
          fi

      - name: Close existing proto sync PRs
        if: steps.check_changes.outputs.has_changes == 'true'
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          # Find and close any existing open PRs from the sync-protos branch
          EXISTING_PRS=$(gh pr list --head dev/github-bot/sync-protos --json number --jq '.[].number')
          if [ -n "$EXISTING_PRS" ]; then
            for PR_NUMBER in $EXISTING_PRS; do
              echo "Closing existing PR #$PR_NUMBER"
              gh pr close $PR_NUMBER --comment "Closing in favor of a new proto sync PR with updated changes."
            done
          fi

      - name: Create Pull Request
        if: steps.check_changes.outputs.has_changes == 'true'
        uses: peter-evans/create-pull-request@v7
        with:
          commit-message: |
            Sync generated proto files

            This is an automated update of generated proto files (.gen.cc/h,
            .pcz.h, descriptors, etc.) to match their .proto definitions.
          branch: dev/github-bot/sync-protos
          delete-branch: true
          title: 'Sync generated proto files'
          body: |
            This PR automatically synchronizes generated proto files with their `.proto` definitions.

            ## Generated files updated
            - `.gen.cc` and `.gen.h` files
            - `.pcz.h` files
            - Binary descriptors
            - Python proto bindings

            This is an automated PR generated by the `sync-protos` workflow.
          labels: automated