What is the colon operator in Gradle?

Question

You always see code like

project(':bluewhale').hello 

It doesn't look like Groovy syntax, what is it?

Answer 1

The colon is not an operator (you can see that it is used inside the string). This is the delimiter that Gradle uses to describe subproject paths. For example,

evaluationDependsOn(':api:producer')

will search for a subproject of a producersubproject api.