To get started, you need to checkout jchemhub:

	After you cd to your workspace:

	For read-only (replace the URL for read-write access):
	git clone git://github.com/chemhack/jchemhub.git

	cd jchemhub

This will pull in the google closure library:

	git submodule init

	git submodule update
	

If you make an edit that changes a goog.provide or goog.require statement, 
there are two ways to update deps.js: the first (recommended) is with the ant build script or you can use 
the command line to invoke calcdeps.py as described below.  The ant script also provides for running the closure compiler
which, in addition to minimizing the code to a single file, also provides many useful checks.

With ant:

You need to have ant installed (http://ant.apache.org).  

From the base jchemhub directory, to see the usage message, just execute

	ant
	
Usage is the default target, so you should see output something like this:
	
	Buildfile: build.xml

	usage:
    	 [java] Buildfile: build.xml

	Main targets:

 	 build-deps               rebuild deps.js file
	 clean                    delete generated files
	 compile-advanced         compile with ADVANCED_OPTIMIZATIONS setting
	 compile-check            check by compiling all jchemhub files
	 compile-simple           compile with SIMPLE_OPTIMIZATIONS setting
	 compile-whitespace-only  compile with WHITESPACE_ONLY setting
	 usage                    Display main targets by running 'ant -projecthelp'
	Default target: usage
	
To update deps.js, execute the build-deps target:
	
	ant build-deps
	
The targets compile-whitespace-only, compile-simple, compile-advanced include only files to support jchemhub.controller.ReactionEditor.  
The smallest download size will result from executing:
	
	ant compile-advanced
	
The compile output will be created in a 'build' directory that will be created if necessary.

The target compile-check attempts to compile all jchemhub code.  This purpose of this target is to take advantage of the closure compile-time checks that
include static type checking, access violations, etc.  For more information on options (not all of which are currently enabled in the ant build script) see 
http://code.google.com/p/closure-compiler/wiki/Warnings.


Alternatively, without ant, it is also possibly to execute the calcdeps python script as follows to re-generate deps.js:

	cd third-party/closure/closure/goog/
	
	python ../bin/calcdeps.py -o deps -p ../../../../jchemhub/ -p ../../closure/ > ../../../../jchemhub/deps.js