name: Check for dependency changes

on:
  pull_request:
    types: [opened, synchronize, reopened]

permissions:
  contents: read
  pull-requests: write

jobs:
  compare-overrides:
    runs-on: ubuntu-24.04

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0
          ref: ${{ github.event.pull_request.head.sha }}

      - uses: actions/setup-go@v5
        with:
          go-version: stable

      - name: Compare pubspec overrides
        id: compare
        env:
          BASE_REF: ${{ github.event.pull_request.base.ref }}
        run: |
          git fetch origin "$BASE_REF"
          base_sha=$(git rev-parse "origin/$BASE_REF")
          head_sha="${{ github.event.pull_request.head.sha }}"

          ./scripts/compare_overrides.sh "$base_sha" "$head_sha" > /tmp/compare_output.txt

          if [[ ! -s /tmp/compare_output.txt ]]; then
            echo "has_output=false" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          {
            echo '### changes in dependencies'
            echo
            echo '```'
            cat /tmp/compare_output.txt
            echo '```'
          } > /tmp/comment_body.md

          echo "has_output=true" >> "$GITHUB_OUTPUT"

      - uses: marocchino/sticky-pull-request-comment@v2
        if: steps.compare.outputs.has_output == 'true'
        with:
          header: pubspec-overrides-compare
          path: /tmp/comment_body.md