Gradle: Using string interpolation in model DSL -

how can substitute project property in string in model dsl? tried following:

apply plugin: 'com.android.model.native'  model {     android {         ...          sources {             main {                 jni {                     source {                         srcdirs "src"                         include "*.cpp"                     }                     exportedheaders {                         srcdir "${project.rootdir}/include"                     }                 }             }         }     } } 

but got error:

error:attempt read write view of model of type 'org.gradle.model.modelmap<org.gradle.language.base.functionalsourceset>' given rule 'android { ... } @ android/build.gradle line 6, column 5'

it works if assign property value variable outside of model block , substitute variable instead:

def foodir = project.rootdir ... srcdir "${foodir}/include" 

but that's bit inconvenient.

it's weird error, means trying access property has not been declared input rule creating. declare input have use "special syntax" model dsl. example, access project.builddir, must use:

$.builddir 

unfortunately, project.rootdir not bound model path yet. caching value in variable accessible model rules (as have done) seems decent workaround now.