Scala Plugin for IntelliJ IDEA
Plugin that implements Scala, sbt, Play 2, SSP and Hocon support in IntelliJ IDEA.
To get information about how to install and use this plugin in IDEA, please use IntelliJ IDEA online help.
If you have any question about the Scala plugin, we'd be glad to answer it in our developer community.
If you found a bug, please report it on our issue tracker.
If you want to contribute, please see our intro to the Scala plugin internals.
Setting up the project
In order to take part in Scala plugin development, you need to:
Install IntelliJ IDEA 2017.1 or higher with a compatible version of Scala plugin
Fork this repository and clone it to your computer
$ git clone https://github.com/JetBrains/intellij-scala.git
Open IntelliJ IDEA, select
File -> New -> Project from existing sources, point to the directory where Scala plugin repository is and then import it as sbt project.
When importing is finished, in order to get artifacts and run configurations for IDEA project, go to the Scala plugin repo directory and run
$ git checkout .idea
- Open the sbt options (
Preferences -> Build, Execution, Deployment -> sbt)
Use sbt shell for build and import
Global sbt settings -> JVM Options -> Maximum heap size, enter at least
- Select the IDEA run configuration and select the
Debugbutton to build and start a development version of IDEA with the Scala plugin.
Browsing IntelliJ platform sources
When loading the plugin in sbt, the IntelliJ platform is downloaded to
When opening a platform API class you will see the option to "attach sources".
Click it, navigate to the sdk directory and select
sources.zip, then choose "All".
To run tests properly, the plugin needs to be packaged. On the sbt shell:
The "fast tests" can take over an hour. To get a quick feedback on project health, run the "typeInference tests"
> testOnly org.jetbrains.plugins.scala.lang.typeInference.*
The project is configured to build and run the typeInference tests with Travis CI, which you can enable in your forks. The full test suite can't currently be run because Travis doesn't allow builds to take that long.
Running the plugin
The easiest way to try your changes is typically to launch the
IDEA run configuration which is created when you
set up the project as described above.
As a standalone plugin
To run and distribute a modified version of the plugin in a regular IntelliJ instance, you need to package it.
- on the sbt shell, run
packagePluginZip. This will output the generated plugin zip location (typically into
- In IntelliJ, open Preferences, section Plugins, choose "Install plugin from disk..." and navigate to the scala-plugin.zip
- Restart IntelliJ