check-depgraph.yml

name: Check Depgraph

on:
  pull_request:
    branches:
      - main

env:
  CARGO_TERM_COLOR: always

jobs:
  check-depgraph:
    runs-on: ubuntu-latest
    permissions:
      # Needed in order to leave comments on pull requests.
      pull-requests: 'write'
    steps:
      - name: Checkout Actions Repository
        uses: actions/checkout@v3

      - name: Install cargo-depgraph
        uses: baptiste0928/cargo-install@v2.1.0
        with:
          crate: cargo-depgraph

      - name: Install graphviz
        run: sudo apt update && sudo apt install -y graphviz

      - name: Generate new depgraph
        run: cargo depgraph --workspace-only | tred | dot -Tsvg -o assets/depgraph.svg

      - name: Check depgraph diff
        run: git diff --exit-code assets/depgraph.svg > assets/depgraph.patch

      - name: Create comment file
        if: ${{ failure() }}
        run: |
          echo "It looks like this pull request changed the workspace structure. \
          Please replace \`assets/depgraph.svg\` with the following text:
          
          <details>
            <summary>depgraph.svg (Don't forget the trailing newline)</summary>
            
          \`\`\`html
          $(cat assets/depgraph.svg)

          \`\`\`
          </details>
          
          For reference, here is a diff against the old \`depgraph.svg\`:

          <details>

          \`\`\`patch
          $(cat assets/depgraph.patch)
          \`\`\`
          </details>" >> pr-comment.txt

      - name: Create pull request comment
        uses: marocchino/sticky-pull-request-comment@v2
        if: ${{ failure() }}
        with:
          recreate: true
          header: depgraph
          path: pr-comment.txt