Task to download all dependencies for all targets in Gradle

build.gradle

// Task to download all dependencies for all targets
task downloadDependencies {
    doLast {
        rootProject.allprojects { project ->
            Set<Configuration> configurations = project.buildscript.configurations + project.configurations
            configurations.findAll { c -> c.canBeResolved }
                    .forEach { c -> c.resolve() }
        }
    }
}