Update (20 April 2011): I’ve now tried this on my old MacBook running OS X 10.5. The bootstrap script initially threw an error, which I tracked down to an outdated version of git. Once I upgraded git and installed bzr (used by the python-mode recipe), I started Emacs and was rewarded with a fully functioning installation, complete with the extensions I want.
I’m on vacation for two weeks between jobs, so of course this means it’s time to sharpen the tools (because writing programs to help you write programs is almost always more fun than actually writing programs). I’ve been an Emacs user for many years, and of course I’ve customized my installation with additional modes and extensions. Previously I would check out code that I needed into a vendor directory, and then load it manually in init.el. And this worked fine, but that doesn’t mean I [STRIKEOUT:can’t] won’t spend a chunk of my day making it better.
A friend mentioned el-get to me, and I decided to give it a try. I like the combination of recipes for installing common things, and the fact that your list of packages is very explicit in init.el (so if I need to dig into one of them, I know exactly where to begin). Additionally, since I’ll have a new computer issued for the new job, I also wanted to get things into shape so that I could easily replicate my preferred editing environment. I wound up creating a small bootstrap file to help things along, getelget.el.
getelget.el checks to see if el-get has been previously bootstrapped, and if not, performs the lazy installation procedure. After it makes sure el-get is available, it loads and executes el-get. So if you need to get a new machine up and going with Emacs and any extensions, you can drop in your init.el and getelget.el, and Emacs will take care of the rest.
To use getelget, define your el-get-sources like you normally would in init.el:
(setq el-get-sources '(el-get python-mode ;; etc... ) )
Then load getelget (the following assumes you have getelget.el in your user emacs directory along with init.el):
;; getelget -- bootstrap el-get if necessary and load the specified packages (load-file (concat (file-name-as-directory user-emacs-directory) "getelget.el"))
getelget will handle bootstrapping, loading, and executing el-get.