Compressing and Concatenating JS

// hope this answers your question

//first follow the instructions for setting up narwhal
// http://karmaeducation.org/2010/01/15/getting-started-with-narwhal-a-standard-library-for-javascript/

//update your catalog of available commonJS packages
// tusk is a lot like ruby's  'gem' command
$ tusk update

//then install yuicompressor, shrinksafe others
$ tusk install yuicompressor shrinksafe closure-compiler

//sadly yuicompressor doesn't accept multiple js files as inputs
$ yuicompressor 1.js >> allmy.js; yuicompressor 2.js >> allmy.js; yuicompressor n.js >> allmy.js

//shrinksafe does
$ shrinksafe *.js >> allmy.js

//closure-compiler doesn't seem to work for me for more than 1 file at a time
$ closure-compiler -js some.js >> allmy.js