The Closure Auto Compiler utilizes Google's Closure Compiler to automatically minify Javascript files as they are updated on your file system.

Currently, once executed via the command line the auto-compiler will poll a given directory for any *.js files that have been recently updated. Once it finds a candidate it performs the minification, resulting in a newly updated *.min.js file.

• Linux or Mac OSX
• Google's Closure Compiler

Download the latest Closure Compiler from the Google Code page, and place the compiler.jar file somewhere on your computer (typically /usr/local/lib or the like).

Checkout the js-auto-compiler script somewhere in your $PATH (make it executable via chmod +x).

Create a configuration file called /etc/default/closure with your desired polling frequency and the path to the compiler.jar file. Example

CLOSURE_COMPILER="/usr/local/lib/compiler.jar"
FREQUENCY=5 # poll every 5 seconds

Run the following command in a terminal to start auto-compiling:

user@hostname:~$ js-auto-compiler /path/to/js/
Scanning directory: /path/to/js ...
  minifying: somefile.js => somefile.min.js