IntelliJ Platform SDK DevGuide

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Plugin Dependencies

Your plugin may depend on classes from other plugins, either bundled, third-party or your own. In order to express such dependencies (e.g. Kotlin), you need to perform the following steps:

  • If the plugin is not bundled, run the sandbox instance of your target IDE and install the plugin there.
  • If you are using Gradle with a Kotlin build script to build your plugin, use setPlugins()1 within the intellij block, for example:
intellij { setPlugins("org.jetbrains.kotlin:1.3.11-release-IJ2018.3-1") }
  • If you’re using Gradle with a groovy build script to build your plugin, add the dependency to the plugins1 parameter of the intellij block in your build.gradle, for example:
intellij { plugins 'org.jetbrains.kotlin:1.3.11-release-IJ2018.3-1' }
  • If you aren’t using Gradle, add the jars of the plugin you’re depending on to the classpath of your IntelliJ Platform SDK. In order to do that, open the Project Structure dialog, select the SDK you’re using, press the + button in the Classpath tab, and select the plugin jar file or files.
    • For bundled plugins, the plugin jar files are located in plugins/<pluginname> or plugins/<pluginname>/lib under the main installation directory. If you’re not sure which jar to add, you can add all of them.
    • For non-bundled plugins, the plugin jar files are located in config/plugins/<pluginname> or config/plugins/<pluginname>/lib under the directory specified as “Sandbox Home” in the IntelliJ Platform Plugin SDK settings.

Adding Plugin to Classpath

  • Add a <depends> tag to your plugin.xml, adding the ID of the plugin you’re depending on as the contents of the tag. For example:

To find out the ID of the plugin you’re depending on, locate the META-INF/plugin.xml file inside its jar and check the contents of the <id> tag.

Optional Plugin Dependencies

You can also specify an optional plugin dependency. In this case, your plugin will load even if the plugin you depend on is not installed or enabled, but part of the functionality of your plugin will not be available. In order to do that, add optional="true" config-file="otherconfig.xml" to the <depends> tag.

For example, if you’re working on a plugin that adds additional highlighting for Java and Kotlin files, you can use the following setup. Your main plugin.xml will define an annotator for Java and specify an optional dependency on the Kotlin plugin:

<idea-plugin> ... <depends optional="true" config-file="withKotlin.xml">org.jetbrains.kotlin</depends> <extensions defaultExtensionNs="com.intellij"> <annotator language="JAVA" implementationClass="com.example.MyJavaAnnotator"/> </extensions> </idea-plugin>

Then, you create a file called withKotlin.xml, in the same directory as your main plugin.xml file. In that file, you define an annotator for Kotlin:

<idea-plugin> <extensions defaultExtensionNs="com.intellij"> <annotator language="kotlin" implementationClass="com.example.MyKotlinAnnotator"/> </extensions> </idea-plugin>

  1. See the plugins attribute gradle-intellij-plugin: Configuration for acceptable values.  2

Last modified: 24 January 2019