Before you do anything you need the git repostiory.
git clone git://github.com/gonzojive/cl-spidermonkey.git
First you need to compile Spidermonkey. It's not that bad! Just cd into the vendor directory and then run the install script:
cd vendor sh install-spidermonkey.sh
That will download and install SpiderMonkey, and set up all the paths properly.
Now you should be able to load the library in lisp:
REPL> (asdf:operate 'asdf:load-op :cl-spidermonkey)
To make sure everything's peachy, run the test suite:
REPL> (asdf:operate 'asdf:load-op :cl-spidermonkey-tests) REPL> (spidermonkey-tests:spidermonkey-tests)
Right now there are only two exported symbols, so things are pretty easy:
REPL> (sm::with-js-context (context) (sm:evaluate-js "10 * 24;")) 240
Note that you can only get doubles, ints, strings, voids (undefined), nulls, and boolean values back from EVALUATE-JS. Any other object will come back as a pointer to a JS_Object whichs needs further attention from the bindings. If you are so inclined, lookat the src/spidermonkey-bindings.lisp file for more info on how to deal with native Spidermonkey objects.