Cannot apply to buildSrc about ktlint-gradle

[JLLeitschuh]

Can you share a build scan?

Also, a minor reproducer would be nice.

@wakingrufus we could probably automatically filter out this directory when the kotlin-dsl plugin is applied. Thoughts?

[pkubowicz]

The scan is here: https://scans.gradle.com/s/enzehbyek47qs

Attached a simple reproducer.
gradle-kotlin-buildsrc.zip

[wakingrufus]

Can you share a build scan?

Also, a minor reproducer would be nice.

@wakingrufus we could probably automatically filter out this directory when the kotlin-dsl plugin is applied. Thoughts?

We could. I don't see this problem in regular projects using the kotlin-dsl plugin, so what is different about buildSrc that causes this?

[xenomachina]

tl;dr: It looks like something is getting cached in buildSrc/.gradle/buildOutputCleanup/ that's preventing changes to excludes from being honored.

---

I ran into this same problem: ktlint was reporting errors in the Kotlin code that Gradle generates in buildSrc/. I added an exclude like this...

ktlint {
    filter {
        exclude {
            it.file.relativeTo(projectDir).startsWith(File("build"))
        }
    }
}

...and it continued reporting these errors. Eventually I used git clean to delete all ignored files from my repo, and then it started working.

I was able to narrow the problem down to buildSrc/.gradle/buildOutputCleanup/ by conducting the following series of tests:

• Start from a clean repo, with the above exclude: WORKS
• Remove exclude: FAILS
• Add exclude back: FAILS
• rm -rf buildSrc/.gradle/: WORKS
• Remove exclude: FAILS
• Add exclude back: FAILS
• rm -rf buildSrc/.gradle/kotlin/: FAILS
• rm -rf buildSrc/.gradle/buildOutputCleanup/: WORKS
• Remove exclude: FAILS
• Add exclude back: FAILS
• rm -rf buildSrc/.gradle/buildOutputCleanup/: WORKS

"WORKS" and "FAILS" indicate the outcome of running ./gradlew :buildSrc:ktlintCheck after the corresponding operation.