Hi, I want to know the details how Gradle parse build.gradle which be constructed by Groovy, and I cannot figure out the parse flow by Gradle source code.
It will be more nice that anybody can introduce the related modules in Gradle source code. 
Chapter 55 of the Gradle documentation might be of some help.
I would also suggest you watch Groovy for Gradle Users as it may clear up some confusion on the Gradle DSL syntax and how it relates back to Groovy code.