Gradle Single vs Double Quotes

Question

I'm new to gradle and am currently just trying to follow the tutorials and quite a few times I've seen single and double quotes intermixed. I just wanted to know if there was a difference of when one set should be used over the other. One example of this is section 6.12 of the tutorial - Default tasks:

defaultTasks 'clean', 'run'  task clean << {     println 'Default Cleaning!' }  task run << {     println 'Default Running!' }  task other << {     println "I'm not a default task!" } 

So, I would just like to know if I should be paying attention to these differences or if they are inter-changable and I can use either single or double quotes when printing strings in gradle.

Answer 1

Gradle build scripts are written in Groovy. Groovy has both double-quoted and single-quoted String literals. The main difference is that double-quoted String literals support String interpolation:

def x = 10 println "result is $x" // prints: result is 10 

You can learn more about Groovy String interpolation in this or other Groovy articles on the web.

Answer 2

Yes, you can use one or the other. The only difference is that double-quoted strings can be GStrings, which can contain evaluated expressions like in the following example taken from the Groovy documentation:

foxtype = 'quick' foxcolor = ['b', 'r', 'o', 'w', 'n'] println "The $foxtype ${foxcolor.join()} fox" // => The quick brown fox