Automatically load clojure libraries on cider connection

Question

I constantly find myself doing multiple manual (require '[my.lib :as foo]) right after I start cider with M-x cider-jack-in in my clojure projects. I suspect there must be a hook to run some code on a successful connection. Is there? The alternative would be to put all requires in an external file and just (use 'that.namespace) but lazy as I am, I want to even skip that step if possible.

UPDATE:

Putting the forms in .lein/profiles.clj :injections is fine as long as one uses them exclusively in the Repl (as per lein repl). To make them available from the nrepl in emacs one must use the second solution named by arrdem below.

Here is some more comprehensive info.

Answer 1

Leiningen's :injections feature is the cannonical way to pull this one off. Once Lein boots a Clojure instance, the code in :injections gets evaluated allowing you as you say to populate the user namespace with libraries that you use all the time.

Another approach is to (ab)use the file user.clj by adding a :dev profile with a dev-only source path that "happens" to contain a user.clj with preloading code in it. This is done in Grimoire with the file dev/user.clj which serves to create some utility functions in the REPL.