preserve formatting when updating xml file with groovy

Question

I have a large number of XML files that contain URLs. I\'m writing a groovy utility to find each URL and replace it with an updated version.

Given example.xml:

Answer 1

There is a solution without any 3rd party library.

def xml = file.text
def document = groovy.xml.DOMBuilder.parse(new StringReader(xml))
def root = document.documentElement
use(groovy.xml.dom.DOMCategory) {
    // manipulate the XML here, i.e. root.someElement?.each { it.value = 'new value'}
}

def result = groovy.xml.dom.DOMUtil.serialize(root)

file.withWriter { w ->
    w.write(result)
}

Taken from http://jonathan-whywecanthavenicethings.blogspot.de/2011/07/keep-your-hands-off-of-my-whitespace.html