I’m getting a huge number of compilation errors when I run `./gradlew detektMain` on my Android proj...

# detekt

[Michael Marshall]

I’m getting a huge number of compilation errors when I run ./gradlew detektMain on my Android project. Including this… 😂

error: 'trySend(E): ChannelResult<Unit>' is only available since Kotlin 1.4.30 and cannot be used in Kotlin 1.5

These errors don’t come up when compiling normally, what’s happening here?

[gammax]

Which version of Kotlin are you using?

[Michael Marshall]

Our project uses Kotlin 1.5.20

[gammax]

Are you on Detekt 1.18.0?

[Michael Marshall]

1.15.0 at the moment. I tried to use 1.18.0 but it complained about my config file being invalid at “comments>excludes” so I backtracked

[Michael Marshall]

I have these applied to my subprojects

tasks.withType<Detekt> {
    jvmTarget = "11"
}

detekt {
    toolVersion = Dependencies.Libraries.detektVersion
    input = files("src/main/java")
    config = rootProject.files("buildSrc/detekt.yml")
}

[gammax]

You would need to update to 1.18.0 to make it work correctly. The reason is that 1.15.x was using a older version of Kotlin: https://detekt.github.io/detekt/compatibility.html#detekt-support-commitment
Therefore it’s loading a older version of kotlin-compiler-embeddable and is not able to analyse your code correctly.

We will do a point release soon-ish to fix the issue you’re experiencing with "comments>excludes"

[Michael Marshall]

So if I understand correctly, the Kotlin version being used is determined by Detekt, not the project it’s in?

[gammax]

When you use detektMain , yes.

[gammax]

In the future we’re looking into offering this: github.com/detekt/detekt-compiler-plugin/

This will make integration with your normal compilation flow easier.

[Michael Marshall]

Ah sweet! Is Java 11 supported yet?

[gammax]

it is 👍

[Michael Marshall]

Awesome, I’ll wait for the 1.18.1 release then - is there a timeline?

[gammax]

When we have time 😁

[Michael Marshall]

Can’t argue with that

[Michael Marshall]

I’ve upgraded to 1.18.0 but I’m still getting compilation errors, e.g.

error: class 'MyClass' is not abstract and does not implement abstract member public abstract fun describeContents(): Int defined in android.os.Parcelable

for a class that has @Parcelize
and lots of error: unresolved reference: someVar

[gammax]

That’s potentially the same issue as: https://github.com/detekt/detekt/issues/3272

[Michael Marshall]

Yep it sounds a lot like what it quotes in there:

This is due to the inability to gather the complete compile classpath from the Android Gradle Plugin (upstream ticket) and can safely be ignored.

I’ll just wait for the Kotlin compiler plugin and ignore the errors for now

[gammax]

Yes so you’ll probably see those compilation error, but Detekt will run regardless (with some unresolved symbols).

[Michael Marshall]

It might be nice to have that on the documentation somewhere, since it really looks like something’s gone wrong when you run it