README.adoc

plantuml-gradle-plugin

Gradle plugin to build PlantUML diagrams from code (for living and up-to-date documentation).

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Dependency

Please refer to https://plugins.gradle.org/plugin/com.github.roroche.plantuml

Using the plugins DSL:

build.gradle

plugins {
    id "com.github.roroche.plantuml" version "{latest_version}" // (1)
}

1. The plugin ID with the latest version.

Using legacy plugin application:

build.gradle

buildscript {
    repositories {
        maven {
          url "https://plugins.gradle.org/m2/" // (1)
        }
    }
    dependencies {
        classpath "com.github.roroche:plantuml-gradle-plugin:{latest_version}" // (2)
    }
}

apply plugin: "com.github.roroche.plantuml" // (3)

1. Declare the repository where to look for the plugin.

2. Declare the dependency to the plugin.

3. Apply the plugin.

Maybe you would have to configure the plugin management with repositories where to look for plugins:

settings.gradle

pluginManagement {
    repositories {
        gradlePluginPortal() // (1)
    }
}

1. Include the official Gradle plugin portal.

Configuration

build.gradle

classDiagram { // (1)
    packageName = "com.github.roroche" // (2)
    outputFile = project.file('diagrams/class_diagram.plantuml') // (3)
    // outputFile = new File("${projectDir}/diagrams/class_diagram.plantuml") // (4)
    ignoredClasses = [ // (5)
            "com.github.roroche.plantuml.diagrams.Diagram\$Simple",
            "com.github.roroche.plantuml.diagrams.Diagram\$Wrap",
            "com.github.roroche.plantuml.classes.Classes\$Simple",
            "com.github.roroche.plantuml.classes.Classes\$Wrap"
    ]
}

1. The name of the extension.

2. The name of the package to scan.

3. The file where to print the class diagram.

4. Equivalent declaration to use explicit variable ${projectDir}.

5. The classes to be ignored while building the class diagram (an array of strings).

Usage

Simply run the buildClassDiagram task, such as:

./gradlew buildClassDiagram

Output examples

Here is the output of the plugin applied to itself (cf. previous Configuration).

link:diagrams/class_diagram.plantuml[role=include]

@startuml

class "BuildClassDiagramTask" {
  extension : ClassDiagramExtension
  metaClass : MetaClass
  execute()
  getProperty(String) : Object
  invokeMethod(String, Object) : Object
}

class "ClassDiagram"

class "ClassDiagramExtension" {
  packageName : String
  outputFile : File
  ignoredClasses : List<String>
  metaClass : MetaClass
  getProperty(String) : Object
  invokeMethod(String, Object) : Object
  setProperty(String, Object)
}

interface "Classes" {
  list() : List<Class<?>>
}

class "ClsFiltered" {
  ignored : Classes
  list() : List<Class<?>>
}

class "ClsInPackage" {
  packageName : String
  packageUrls : Collection<URL>
  reflections : Reflections
  list() : List<Class<?>>
}

class "ClsWithLog" {
  logger : Logger
  list() : List<Class<?>>
}

class "ClsWithNames" {
  names : List<String>
  list() : List<Class<?>>
}

interface "CustomTask" {
  execute()
}

interface "Diagram" {
  content() : String
  print(File)
}

class "DiagramWithLog" {
  logger : Logger
  print(File)
}

class "PlantUmlPlugin" {
  metaClass : MetaClass
  apply(Project)
  apply(Object)
  getProperty(String) : Object
  invokeMethod(String, Object) : Object
  setProperty(String, Object)
}

"BuildClassDiagramTask" --> "ClassDiagramExtension" : extension
"Classes" <-> "ClsFiltered" : /ignored
"Classes" <|-- "ClsInPackage"
"Classes" <|-- "ClsWithLog"
"Classes" <|-- "ClsWithNames"
"CustomTask" <|-- "BuildClassDiagramTask"
"Diagram" <|-- "ClassDiagram"
"Diagram" <|-- "DiagramWithLog"

@enduml

Opportunity

It’s possible to associate this plugin with this pretty good one: https://framagit.org/avaiss/plantuml-gradle-plugin

Here is the example of the configuration applied for this project:

build.gradle

plugins {
    id "org.fmiw.plantuml" version "0.1" // (1)
}

plantuml {
    options {
        outputDir = project.file('diagrams') // (2)
    }

    diagrams {
        classes {
            sourceFile = project.file('diagrams/class_diagram.plantuml') // (3)
        }
    }
}

generateDiagramClasses.dependsOn(buildClassDiagram) // (4)

1. Declare the dependency.

2. Configure the output directory where to store SVG files.

3. Configure the source file to provide to the plugin.

4. Force the buildClassDiagram task to be performed before executing the generateDiagramClasses one.

Credits

Built on top of awesome libraries:

• https://github.com/jboz/plantuml-builder

• https://github.com/classgraph/classgraph

Icon credits

Icons made by Eucalyp from www.flaticon.com

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