Any way to add dependency to lein project without REPL restart?

Question

What I do now is open project.clj, add dependency there, run lein deps restart repl, then use, require and so on.

The thing is that I don't really like to restart repl because the startup time is slow and I have to reload my files again.

So is there a better way to add dependency to lein project? without restarting the repl?

score 37 · Accepted Answer · edited Dec 16 '16 at 21:22

37

You can use Alembic, a dynamic classpath loader and dependencies resolver. The good thing is that it doesn't load all pomegranate dependencies.

Add the following to your .lein/profiles.clj:

{:user
  {:dependencies [[alembic "0.3.2"]]}}

Then in your Repl just load the classpaths you need, they will be pulled from the repositories by leinif need:

(require 'alembic.still)
(alembic.still/distill '[enlive "1.1.5"])

(require 'net.cgrand.enlive-html) should now work.

edited Dec 16 '16 at 21:22

Chris Martin

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answered May 07 '13 at 00:29

i-blis

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1

Oh wow, missed this while writing essentially the same answer. +1. – Michał Marczyk May 07 '13 at 00:34
@Kolja, Thanks for spotting the typo. – i-blis May 12 '16 at 17:37

score 13 · Answer 2 · answered May 07 '13 at 00:13

for quick testing you can use pomegranate to add dependencies on the fly

=> (use '[cemerick.pomegranate :only (add-dependencies)])
nil
=> (add-dependencies :coordinates '[[incanter "1.2.3"]])

for actually adding a dependency I ususally hit

Alt-x nrepl-restart
ctrl-cctrl-k to reload the file,
ctrl-calt-n to get back to the namespace i in the buffer

The whole process takes the jvm startup time (which i agree is a touch painful) plus five seconds. It helps to keep your project in a state where loading a file does all the require initialization.

Any way to add dependency to lein project without REPL restart?

2 Answers2

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