name: Update Documentation

on:
  push:
    branches:
      - main

jobs:
  build:
    permissions:
      contents: write
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
      - name: Install APT packages
        run: |
          sudo apt-get update
          # setup-java requires gpg
          sudo apt-get install -y protobuf-compiler gpg
          pip install sabledocs
      - uses: actions/setup-java@dd06d9cba3e5552c54d9f8ea23572deb30010f7c # v6.0.0
        with:
          distribution: 'temurin'
          java-version-file: .java-version
          cache: 'maven'
      - name: Generate OpenAPI documentation
        run: ./mvnw compile
      - name: Generate gRPC documentation
        run: |
          protoc -I service/src/main/proto service/src/main/proto/org/signal/chat/*.proto \
            -o api-doc/grpc/descriptor.pb --include_source_info
          cd api-doc/grpc && sabledocs
      - name: Push documentation to gh-pages
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          git config user.email "github@signal.org"
          git config user.name "Documentation Updater"
          git fetch origin gh-pages
          git checkout gh-pages
          cp api-doc/target/openapi/signal-server-openapi.yaml .
          rm -rf grpc
          cp -r api-doc/grpc/sabledocs_output grpc
          git add -A signal-server-openapi.yaml grpc
          git diff --cached --quiet || git commit -m "Updating documentation"
          git push origin gh-pages -q