Gradle: How do I configure a plugin extension (eg. checkstyle {...}) for all subprojects?

Saket Mehta :

I have the following in my root build.gradle file.

subprojects {
    apply plugin: 'checkstyle'

    checkstyle {
        maxWarnings = 0
    }
}

But it seems IntelliJ only recognizes the checkstyle extension block if I put the above in a allprojects block. The IDE simply greys out the checkstyle keyword and underlines it with a squiggly line. See the image for reference.

When put under the allprojects block, it works fine:

Can someone explain to me what is happening here? If this is just an IDE thing, would love to have some insight into why this might be happening.

Stanislav :

I suppose it's just an IDE thing and happens because in case you are using the allproject configuration, then your current project is getting a checkstyle plugin applied too, like all it's child projects, and IDE can find a checkstyle configuration closure.

Opposite, if you are using the subproject, your current project configuration doesn't have a checkstyle plugin apllied and IDE can't see a closure to configure it in the scope of this project.