ApplicationVariants.all conversion

[AlexHuicu]

In groovy we have
applicationVariants.all { variant -> //do stuff }

but, when converting to kotlin, the same block of code changes it's functionality:
applicationVariants.all { variant -> //do stuff }

This is due the fact that in groovy the closure given as a parameter to .all method can rename it's receiver (in this case it's renamed to variant).
BUT the same block code in kotlin is not a closure anymore, it becomes a lambda. The ".all" method called now is the one in the Iterable interface. (before it was calling the .all inside DomainObjectSet<> interface)

The real kotlin correspondent is:
applicationVariants.all { val variant = this //do stuff }.

I do not expect your converter to go so deep into the conversion, but please add this information to this wiki as it is very tricky to observe it

[AlexHuicu]

Further more:

applicationVariants.all {
          val variant = this
          variant.outputs.all { output ->
              //Do something with the output
         }
}

should be converted to

applicationVariants.all {
        val variant = this

        variant.outputs.all { 
              val output = this
              //Do something with the output
         }
}

To improve it further:
val output = this
should be changed to
val output = this as ApkVariantOutputImpl
Groovy has loose typing and output is automatically casted to it's actual type, but kotlin will see "option" as a BaseVariantOutput, which is not very usefull.

[bernaferrari]

Oh ohhh.. Makes sense. I can add a comment before it like // HEY THIS IS BROKEN or just add what you suggested, but I'm not sure how it would work in more complex scenarios. Do you have a few examples? It doesn't look too complex to implement.

[AlexHuicu]

applicationVariants.all {
        val variant = this
        var flavor = variant.mergedFlavor
        var name = flavor.versionName
        var code =  getCustomCodeNumber()
        variant.outputs.all {
            this as ApkVariantOutputImpl
            versionNameOverride = name
            versionCodeOverride = code
            outputFileName =getOutputFileName(flavor,name,code)
        }
    }

[AlexHuicu]

This is the usage of the code I wrote above

[AlexHuicu]

Something like:
"Check if the correct .all method is called. Does it belongs to DomainObjectSet interface? If not, please remove the named argument inside the closure," - and here maybe an url to the wiki where this problem is stated.