Groovy 2 Cookbook

Walking through a directory recursively

Hierarchical file systems are the way we store most of our data. Groovy can help to build code that needs to go through a dense forest of directory trees.

In this recipe, we will cover different ways of walking through a directory tree using Groovy I/O awesomeness.

Getting ready

Let's assume that we need to walk through the current working directory. We can define the currentDir variable of java.io.File type that points to it:

def currentDir = new File('.')

To test this recipe, you can use either a script file that you launch with the groovy command or the groovysh/groovyConsole prompt.

How to do it...

As you probably know, the java.io.File class already provides the list and listFiles methods that return a collection ...