May 20, 2010

Gradle and IntelliJ IDEA

Posted in Dev at 8:14 by djn

At work, I’ve been migrating a legacy build system to gradle. We use IntelliJ IDEA as IDE and the integration between the two is quite barebones.

Inspired by Felipe Cypriano, I extended his task to sync dependencies from Gradle to IDEA in a multiproject build.

It creates a library file for each subproject and each configuration (if it contains any dependencies). Project dependencies are ignored.

Read more for source

task syncIdeaLibraries << {
  description = 'Add gradle dependecies for each project to IntelliJ project libraries'

  final File librariesDir = new File(".idea${File.separator}libraries")
  librariesDir.mkdirs()

  def createLibrary = { fileName, libraryName, jars ->
    final def gradleLibXml = new File(librariesDir, fileName)
    gradleLibXml.write '''
  <component name=\"libraryTable\">
  <library name=\"''' + String.valueOf(libraryName) + '''\"/>
  </component>'''

    final def xmlRoot = new XmlParser().parse(gradleLibXml)
    final def classesNode = xmlRoot.library[0].appendNode('CLASSES')

    jars.each { jar ->
      classesNode.appendNode('root', [url: "jar://${jar.trim()}!/"])
    }

    def writer = new StringWriter()
    new XmlNodePrinter(new PrintWriter(writer)).print(xmlRoot)
    gradleLibXml.write writer.toString()
    println "File '${gradleLibXml.path}' updated"
  }

  println "Idea library path: ${librariesDir.path}"
  final File userHomeGradle = project.gradle.gradleUserHomeDir
  println "Set the USER_HOME_GRADLE variable to '$userHomeGradle.path'"
  project.subprojects.each { p ->
    p.configurations.each { c ->
      if (!c.dependencies.isEmpty()) {
        def jars = c.files.collect { f ->
          if (f.path.startsWith(userHomeGradle.path)) {
            "\$USER_HOME_GRADLE\$${f.path.substring(userHomeGradle.path.size())}"
          }
        }
        jars.removeAll([null])
        createLibrary "Gradle_${p.name}_${c.name}.xml", "Gradle ${p.name} ${c.name}", jars

      }
    }
  }
}

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