Hello! I'm having difficulties with the Groovy DSL, specifically that I am unable to use the implicit

it

on actions. The script will compile and the

doCall

is intercepted to try and set the property of the current dynamic object. And this is not including types that are `DslObject`s or

DynamicObjectAware

. Both method calls and the short-hand for getters and setters don't work. Basically, this works:

accessTransformers.register {
    it.config = project.file('accesstransformer.cfg')
}

and this doesn't:

accessTransformers.register {
    config = project.file('accesstransformer.cfg')
}

why is that? and is there anything I can realistically do about this without needing to use something like a domain object container? For reference, this is the method they are calling in this example

default AccessTransformersContainer register(Action<? super AccessTransformersContainer.Options> options) {
    return this.register(AccessTransformersExtension.DEFAULT_ATTRIBUTE, options);
}

and this is the exception being thrown:

Caused by: groovy.lang.MissingPropertyException: Could not set unknown property 'config' for project ':at-gradle-demo' of type org.gradle.api.Project.
	at org.gradle.internal.metaobject.AbstractDynamicObject.setMissingProperty(AbstractDynamicObject.java:118)
	at org.gradle.groovy.scripts.BasicScript$ScriptDynamicObject.setMissingProperty(BasicScript.java:170)
	at org.gradle.internal.metaobject.AbstractDynamicObject.setProperty(AbstractDynamicObject.java:76)
	at org.gradle.api.internal.project.DefaultDynamicLookupRoutine.setProperty(DefaultDynamicLookupRoutine.java:42)
	at org.gradle.groovy.scripts.BasicScript.setProperty(BasicScript.java:74)
	at org.gradle.internal.classpath.declarations.GroovyDynamicDispatchInterceptors.callInstrumentedSetProperty(GroovyDynamicDispatchInterceptors.java:102)
	at org.gradle.internal.classpath.declarations.GroovyDynamicDispatchInterceptors.intercept_setProperty(GroovyDynamicDispatchInterceptors.java:89)
	at build_es5ivf5z9jwb4t9pnjernbno6$_run_closure1.doCall$original([path]/at-gradle-demo/build.gradle:9)

If this is a bug, let me know so I can report it. But for now I'm under the assumption that there's a good reason for this.

https://groovy-lang.org/closures.html#_delegation_strategy_2 in general, a name

config

within a Groovy closure may resolve to

owner.config

,

delegate.config

, or

self.config

. none of those are

it.config

, unless the closure had its delegate changed to be the same as it

I'll try

Closure

and making sure I set the delegate correctly then. I tried earlier just using

Closure.DELEGATE_FIRST

without anything else.

I think this is a similar issue as discussed here: https://github.com/gradle/gradle/issues/33403 See this comment: https://github.com/gradle/gradle/issues/33403#issuecomment-2863555460 Tl;dr: if you instantiate your object via

ObjectFactory

Gradle will add

Closure

methods at runtime for Groovy and then implicit

it

should work. But if you create objects manually (e.g. via constructor) then this won't work. I guess in your case, you are instantiating

AccessTransformersContainer.Options

manually.

Yes, I was. Though, making a utility method that did what

AbstractTask#doExecute

did worked for me. So it may have been a class loader moment(?)

I see what

doExecute

does, that looks like magic 🙂. I wouldn't recommend using that, unless you really know how Groovy works. Using ObjectFactory is safer option in the long run, and I think it's also simpler to understand

Using ObjectFactory is what I'll probably end up doing. But will still play around with that magic to try and get a grip on what's going on