Codacy Meta checks in IntelliJ

We are using codacy to improve the code quality of our project Blended. It works really well and provides lot of insights.

This having said, for Scala there are 2 main sources of issues when using codacy out of the box: ScalaStyle and Codacy ScalaMeta Pro.

The Ide of our choice (IntelliJ) dsiplays the issues originating from ScalaStyle just fine, but the issues originating from Codacy’s ScalaMeta where invisible to IntelliJ.

To better work on the code we made an attempt to implement the Codacy Scalameta inspection as a plugin for IntelliJ, so that the issues are navigable in IntelliJ and cleaning up is actually fun ;)

DISCLAIMER

This is my first IntelliJ plugin and I may used the API not entirely as intended. I have shamelessly looked at the Scalastyle inspection implementation as an example, so you will find similarities. For convenience the jar files produced by Codacy ScalaMeta Pro are within here in the version I have tested. If those libraries are released in the future to a central repo, those jars will vanish from here.

Building

The plugin uses the sbt-idea-plugin on top of sbt to build and package the plugin. You will need sbt 1.2.8 or greater to build.

From within the checkout directory simply execute

sbt clean codacymetaIntellij/packagePluginZip

This will create a file

./codacy-meta-intellij/target/codacymetaIntellij-0.1.0-SNAPSHOT.zip

which contains the plugin that can be installed in IntelliJ as a normal plugin (you will need to choose Install plugin from disc).

Running the plugin in a dev instance of IntelliJ

From within the checkout directory, you can run

sbt clean codacymetaIntellij/run

This will download the IntelliJ community edition and the Scala Plugin and will then start the downloaded version of IntelliJ with the Codacy inspection plugin activated, so you can test it in isolation first.

Configuring the plugin

The plugin expects a file codacymeta.json which lives either in the project root directory, in the project directory or in the .idea directory of the project.

This file contains all the inspections that are currently active within IntelliJ. For reference you can find codacymeta.json.complete in this projects to see, what checks might be enabled.

Note	For now the plugin does not evaluate the parameter section within the JSON file to configure the executed patterns. This might be added on as needed basis.

Sample output