Can a standalone gradle plugin export a custom task type? - gradle

Question

I have a standalone Gradle plugin that includes a custom task type:
gradle-conventions/build.gradle
plugins {
id 'groovy-gradle-plugin'
id 'maven-publish'
}
group = 'com.example'
version = '1.0'
publishing {
repositories {
maven {
url = uri('/path/to/repo')
}
}
}
gradle-conventions/src/main/groovy/com.example.my-conventions.gradle
abstract class CustomTask extends DefaultTask {
#TaskAction
def hello() {
println "hello"
}
}
I can consume the plugin from another project, but how can I register a CustomTask? Something like this:
project/build.gradle
plugins {
id 'com.example.my-conventions' version '1.0'
}
// how do I reference CustomTask here?
tasks.register('myCustomTask', com.example.CustomTask) {
// ...
}
Is it possible to export a custom task from a custom plugin? Or must I consume custom tasks using the buildscript mechanism?

Answer 1

Having inspected gradle-conventions-1.0.jar, it seems that the custom task class belongs to the default package, so I can register the task as follows:
project/build.gradle
plugins {
id 'com.example.my-conventions' version '1.0'
}
tasks.register('myCustomTask', CustomTask) {
// ...
}
But this only works com.example.my-conventions.gradle contains groovy code besides the class itself, otherwise I get the error:
An exception occurred applying plugin request [id: 'com.example.my-conventions', version: '1.0']
> Failed to apply plugin 'com.example.my-conventions'.
> java.lang.ClassNotFoundException: precompiled_ComExampleMyConventions
This approach avoids relying on the buildscript mechanism (which is not recommended in the Gradle documentation).