Added options to render diagrams using plantuml and mermaidjs external tools

docs/generator_types.md

@@ -43,6 +43,14 @@ will add before the diagram contents (right after `@startuml`) the title and
 direction hint, and after each diagram contents (right before `@enduml`)
 2 notes attached to elements.
 
+This generator also accepts a `cmd` parameter to specify a command to execute
+on the generated PlantUML source file to generate actual diagram image, for
+instance:
+```yaml
+  plantuml:
+    cmd: "/usr/bin/plantuml -tsvg \"diagrams/{}.puml\""
+```
+
 An example PlantUML diagram is presented below:
 
 ```plantuml
@@ -117,6 +125,14 @@ will add before the diagram contents (right after diagram type,
 e.g. `classDiagram`) diagram direction hint, and after each diagram contents
 2 notes attached to elements.
 
+This generator also accepts a `cmd` parameter to specify a command to execute
+on the generated MermaidJS source file to generate actual diagram image, for
+instance:
+```yaml
+    mermaid:
+      cmd: "mmdc -i \"diagrams/{}.mmd\" -o \"diagrams/{}_mermaid.svg\""
+```
+
 An example MermaidJS diagram is presented below:
 
 ```

docs/quick_start.md

@@ -52,6 +52,12 @@ To add an initial class diagram to your project, follow these steps:
    mmdc -i diagrams/some_class_diagram.mmd -o diagrams/some_class_diagram.svg
    ```
    
+   Steps 3 and 4 can be combined into one step like follows:
+   ```
+   clang-uml -p -n some_class_diagram -g plantuml -r --plantuml-cmd="plantuml -tsvg diagrams/{}.puml"
+   ```
+   where `-r` enables diagram rendering and `--plantuml-cmd` specifies command
+   to execute on each generated diagram.
 5. Add another diagram:
    ```bash
    clang-uml --add-sequence-diagram another_diagram