Kotlin plugin is an IntelliJ IDEA plugin for the Kotlin programming language.

1. Set up instructions
2. Frequently Asked Questions

• IntelliJ IDEA Community or Ultimate, 2020.3 or later
• Kotlin Plugin, 1.4.21 or later

Clone the Kotlin IDE plugin repository:

git clone https://github.com/JetBrains/intellij-kotlin.git

Clone the IDEA Community repository to the intellij/ subdirectory:

cd intellij-kotlin
git clone https://github.com/JetBrains/intellij-community.git intellij

NOTE. You should not try symlinks unless IDEA-255777 is fixed.

Follow the set up instructions in IntelliJ Community.

⚠️ You need to set up multiple JDKs and possibly attach tools.jar from the JDK distribution to some of them.
⚠️ Set a higher value for build process heap memory size. Use the "Build process heap size (MBytes)" text field instead of more generic "VM options" (shared or user-local). 3000 or 4000 megabytes should work well.
⚠️ Check the "Compile independent modules in parallel" option, or the project will take ages to build.

Now you should be able to open and build the project.

Use the provided "IDEA" build configuration to run an IntelliJ IDEA instance with your modifications to the Kotlin plugin.

Q. How can I contribute to the Kotlin IDEA plugin? A. We accept Pull Requests. Please read our contribution guide for more information.

Q. Kotlin IDEA plugin sources are used to be inside the JetBrains/kotlin repository. What happened?
A. We decided to split release cycles for the Kotlin compiler and the IDEA plugin. Now, the majority of new features will arrive together with updates of IntelliJ IDEA.

Q. But the plugin sources are still in JetBrains/kotlin.
A. Code transition is in progress. We will delete the IDE plugin sources from the old repository when we decide it is a good time to do so.

Q. What will happen with Pull Requests submitted to the JetBrains/kotlin repository?
A. We will process all existing PRs and replicate commits in the new repository. However, all new PRs to the Kotlin IDEA plugin code should be done only in this repository.

Kotlin is distributed under the terms of the Apache License (Version 2.0). See license folder for details.