clang-uml/docs/quick_start.md
2024-03-05 17:36:48 +01:00

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Quick start

To add an initial class diagram to your project, follow these steps:

  1. Enter your project's top level directory and run:

    clang-uml --init
    
  2. Edit the generated .clang-uml file and set the following:

    # Path to `compile_commands.json` directory
    compilation_database_dir: .
    # Path to diagram output directory
    output_directory: diagrams
    diagrams:
      # This is the name of the diagram
      some_class_diagram:
        type: class
        # Parse only translation units in `src` subdirectory
        glob:
          - src/*.cc
        # Render all names relative to `myproject` namespace
        using_namespace: myproject
        include:
          # Include only elements in `myproject` namespace
          namespaces:
            - myproject
        exclude:
          # Exclude elements in `myproject::detail` namespace
          namespaces:
            - myproject::detail
    
  3. Run clang-uml in the project's top directory:

    clang-uml
    # or to see generation progress for each diagram
    clang-uml --progress
    
  4. Generate SVG images from the PlantUML diagrams:

    plantuml -tsvg diagrams/*.puml
    

    or generate also MermaidJS diagram (requires mermaid-cli):

    clang-uml --progress -n some_class_diagram -g mermaid
    mmdc -i diagrams/some_class_diagram.mmd -o diagrams/some_class_diagram.svg
    

    Steps 3 and 4 can be combined into one step:

    clang-uml -p -n some_class_diagram -g plantuml -r --plantuml-cmd="/usr/bin/plantuml -tsvg diagrams/{}.puml"
    

    where -r enables diagram rendering and --plantuml-cmd specifies command to execute on each generated diagram.

  5. Add another diagram:

    clang-uml --add-sequence-diagram another_diagram
    
  6. Now list the diagrams defined in the config file:

    clang-uml -l
    The following diagrams are defined in the config file:
      - another_diagram [sequence]
      - some_class_diagram [class]
    
  7. Generate only the new diagram in JSON format:

    clang-uml -n another_diagram -g json