Odtnhj

From root, I am basically trying to fetch the dependencies of each sub project and copy into a directory named dependency within each subproject

I have a root Project and in that build.gradle file i have a task like below:

task copyDependencies(type:Copy) 

 nonTestProjects.each 
 delete rootProject.project(it).file('dependencies')
 from rootProject.project(it).configurations.runtime
 intorootProject.project(it).file('dependencies/')
 

Inside the Sub Projects build.gradle, i have dependencies as below:

 dependencies
 
 implementation "com.google.protobuf:protobuf-java:$protobufVersion"
 implementation "io.netty:netty:$nettyVersion"
 implementation "xmlpull:xmlpull:$xmlPullVersion"

On running the task copydependencies from root, i am getting error as below:

Could not get unknown property 'runtime' for configuration container of type org.gradle.api.internal.artifacts.configurations.DefaultConfig
urationContainer.

You get the error Could not get unknown property 'runtime' for configuration container because when gradle configures your root project and tries to create the task copyDependencies, the subprojects have not yet been evaluated, so Gradle doesn't know about "runtime" configuration at this stage ( java plugin has not yet been applied to subprojects).

So one solution would be to wrap this task creation into a gradle.projectsEvaluated lifecycle hook:

gradle.projectsEvaluated 
 task copyDependencies(type:Copy) 
 // task definition ...
 

But then you will have other issues because you want to copy different sources to different destination directories (see How to copy to multiple destinations with Gradle copy task? for possible solution to this issue)

I think a better way would be to create different copyDependencies tasks, one per subproject , and create an "aggregator" task in root project which will depend on these subprojects's tasks:

// aggregator task at root project level
task copyDependencies

// create copydependencies task for each (non-test) subproject
gradle.projectsEvaluated 
 nonTestProjects.each 
 Project proj = project(it)
 Task task = proj.task('copyDependencies', type: Copy) 
 from proj.configurations.runtimeClasspath
 into proj.file("dependencies")
 doFirst 
 file('dependencies').deleteDir()
 
 
 copyDependencies.dependsOn task