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plantuml-gradle-plugin

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

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DevOps By Rultor.com

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Dependency

Using the plugins DSL:

build.gradle
plugins {
    id "com.github.roroche.plantuml" version "{latest_version}" // (1)
}
  1. The plugin ID with the latest version.

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

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
Class diagram

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.

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