Support for Google Closure Compiler in build scripts

[Adam Peller]

as an alternative to shrinksafe, packer, etc.

[James Burke]

Beginning of a patch, but has a type error.

[James Burke]

I'm trying to get closure to work, but just for the "simple optimizations" minification. I'm running into what I believe are type conversion issues with JavaScript? talking to Java. I attached a patch showing where I am at. To try it:

• Download the closure compiler (I used compiler-20091106b.zip): ​http://code.google.com/p/closure-compiler/downloads/list

• Place it in dojo/util/closurecompiler/compiler.jar

• Apply the above patch from the dojo/util/buildscripts directory.

• Run the following build command:

java -classpath ../shrinksafe/js.jar:../closurecompiler/compiler.jar org.mozilla.javascript.tools.shell.Main build.js profile=base releaseName=clos layerOptimize=closure action=release

I complains about:

js: Cannot convert com.google.javascript.jscomp.SourceFile$Preloaded@26afa68a to com.google.javascript.jscomp.JSSourceFile

Even though I am calling JSSourceFile.fromCode() to generate the source file. Not sure how to resolve the issue. Any ideas are appreciated.

[liucougar]

fixing the type error and add keepLines support

[James Burke]

(In [20740]) Fixes #10282, thanks to liucougar's wizardry. Only simple optimization support is supported with Closure compiler right now.

[James Burke]

Docs added here: ​http://docs.dojocampus.org/build/index#using-google-s-closure-compiler

and the 1.4 release notes were updated.