Extracting files downloaded as a dependency in Gradle - maven

Question

I've got a gradle script that goes something like the following:
apply plugin: 'java'
apply plugin: 'maven'
defaultTasks 'build'
ext.basedir = file('.').getAbsolutePath()
repositories{
maven { url "http://package.repo.com:8081/nexus/content/repository
}
configurations.all {
// check for updates every build
resolutionStrategy.cacheChangingModulesFor 0, 'seconds'
}
dependencies {
compile group:'com.repo.wwpd', name:'kernel_utilities', version:'3.0.0', changing:true
}
task copy_dependencies(type: Copy) {
from configurations.compile
into basedir+'\\install'
include '*'
{ FileTree ioTree = fileTree(dir: "C:\\Users\\username\\install") }
ioTree.each { f ->
copy {
from tarTree(resources.gzip(f))
into "C:\\Users\\user\\test"
}
}
}
The goal is to get the dependencies, move them to the install folder, and extract them from the tar files to the test folder.
The problem appears to be that the task is executed before the dependencies are downloaded. So if the files already exist in install it works fine, but if the install folder is empty the result is an empty test folder but a full install folder.

Answer 1

[EDIT - updated with comments Peter N.]
This should be one way to solve your case ; note it contains two tasks, choose the one(s) that fulfill your needs: simple copy VS full extraction
def installDir = "${buildDir}/install"
def extractDir = "${buildDir}/extract"
// task to copy dependencies
task copyDependencies(type: Copy) {
from configurations.compile
into installDir
}
// task to extract dependencies
task extractDependencies(type: Copy) {
from configurations.compile.collect{tarTree (it)}
into extractDir
}