Gradle files(), fileTree()

build.gradle

//
// Demo Structure
//
// qty:lab qrtt1$ tree
// .
// ├── build.gradle
// └── libs
//     ├── a.jar
//     └── vendorA
//         └── b.jar
//
// 2 directories, 3 files

apply plugin: 'java'

println "\n\nfiles"
println files("libs/a.jar").collect()

println "\n\nfileTree"
println fileTree(include:['*.jar'], dir:"libs").collect()

println "\n\nfileTree with nested dirs"
println fileTree(include:['**/*.jar'], dir:"libs").collect()

// 
// qty:lab qrtt1$ gradle
// 
// 
// files
// [/Users/qrtt1/Downloads/lab/libs/a.jar]
// 
// 
// fileTree
// [/Users/qrtt1/Downloads/lab/libs/a.jar]
// 
// 
// fileTree with nested dirs
// [/Users/qrtt1/Downloads/lab/libs/a.jar, /Users/qrtt1/Downloads/lab/libs/vendorA/b.jar]
// :help
// 
// Welcome to Gradle 2.12.
// 
// To run a build, run gradle <task> ...
// 
// To see a list of available tasks, run gradle tasks
// 
// To see a list of command-line options, run gradle --help
// 
// To see more detail about a task, run gradle help --task <task>
// 
// BUILD SUCCESSFUL
// 
// Total time: 5.216 secs
// 
// This build could be faster, please consider using the Gradle Daemon: https://docs.gradle.org/2.12/userguide/gradle_daemon.html