action.yml

name: "C# Code Graph Generator"
description: "Generates a JSON code graph via Roslyn, ensures a D3 index page from the action repository, and can commit changes."

branding:
  icon: "share-2"
  color: "black"

inputs:
  source-path:
    description: "Directory with .cs files"
    required: false
    default: "./src"

  docs-dir:
    description: "Directory for docs (graph.json + index.html)"
    required: false
    default: "docs"

  index-file:
    description: "HTML file name. If missing, we'll copy default_index.html from the action."
    required: false
    default: "index.html"

  commit-changes:
    description: "Set to 'true' to commit changes back"
    required: false
    default: "false"

runs:
  using: "composite"
  steps:
    - name: Check out code
      uses: actions/checkout@v4
      with:
        persist-credentials: true

    - name: Set up .NET
      uses: actions/setup-dotnet@v4
      with:
        dotnet-version: "8.0.x"

    - name: Build Roslyn tool
      run: dotnet build --configuration Release ./tools/CodeAnalysisTool/CodeAnalysisTool.csproj
      shell: bash

    - name: Run Roslyn tool
      run: dotnet run --project ./tools/CodeAnalysisTool/CodeAnalysisTool.csproj -- ${{ inputs.source-path }} ${{ inputs.docs-dir }}
      shell: bash

    - name: Ensure index.html from action repo
      id: ensure_index
      run: |
        DOCS_DIR="${{ inputs.docs-dir }}"
        INDEX_FILE="${{ inputs.index-file }}"
        ACTION_REPO_DIR="${{ github.action_path }}"
        DEFAULT_INDEX="$ACTION_REPO_DIR/default_index.html"
        TARGET_FILE="${DOCS_DIR}/${INDEX_FILE}"

        if [ ! -f "$TARGET_FILE" ]; then
          echo "No index file found. Copying default visualizer..."
          mkdir -p "$(dirname "$TARGET_FILE")"
          cp "$DEFAULT_INDEX" "$TARGET_FILE"
        else
          echo "Index file already exists. Not overwriting."
        fi
      shell: bash

    - name: Commit changes
      if: ${{ inputs.commit-changes == 'true' }}
      run: |
        git config user.name "github-actions[bot]"
        git config user.email "github-actions[bot]@users.noreply.github.com"
        git add ${{ inputs.docs-dir }}/graph.json ${{ inputs.docs-dir }}/index.html
        if git diff --cached --quiet; then
          echo "No changes to commit."
        else
          git commit -m "Update code graph JSON & index [skip ci]"
          git pull --rebase origin "${GITHUB_REF#refs/heads/}"
          git push
        fi
      shell: bash