Comments on: Building Incanter applications with Leiningen

By: Steven

Steven — Sun, 02 Oct 2011 22:27:50 +0000

This worked for me almost on the first try. Thanks! Looks lein has change a minor detail. I had to change the aot class to include “.core” instead of just the class name (notice the last line in the below project.clj)

[~/clojure/hello]$ cat project.clj
(defproject hello “1.0.0-SNAPSHOT”
:description “FIXME: write description”
:dependencies [[org.clojure/clojure "1.2.1"]
[incanter "1.2.3-SNAPSHOT"]]
:main hello.core)

By: Carson

Carson — Sat, 22 May 2010 04:51:38 +0000

You kidding? Everybody needs Incanter!

Say… the same problem occurs even when I do “lein swank”. I had to copy your script/swank to get that to work too.

Probably doesn’t matter, but I notice in your project.clj that you are using [leiningen/lein-swank "1.1.0"], and it seems that’s “deprecated” now as I see from here http://clojars.org/search?q=swank

I’m using [swank-clojure "1.2.1"] and I got the error still.

By: liebke

liebke — Sat, 22 May 2010 03:46:15 +0000

Haha, yes it would be nice, but Leiningen is a general Clojure build tool, and not everybody needs Incanter in every Clojure project :-)

Once Clojure 1.2 is released (in the next couple weeks or so), Leiningen will likely upgrade its version of Clojure and ‘lein repl’ will work correctly.

By: Carson

Carson — Sat, 22 May 2010 03:34:55 +0000

Thanks!

It’d be nice if “lein new myproj” would create a template with those scripts you mention and a project.clj with incanter already typed in, etc…

By: liebke

liebke — Sat, 22 May 2010 03:22:18 +0000

lein repl doesn’t support Clojure 1.2 yet. This is a known, and very annoying, problem. :-) If you want a command line repl, I suggest using the repl script in the script/ directory of the Incanter distribution (http://github.com/liebke/incanter/blob/master/script/repl)
You’ll also need the associated run.clj script (http://github.com/liebke/incanter/blob/master/script/run.clj).

David

By: Carson

Carson — Sat, 22 May 2010 03:12:40 +0000

I tried your instructions here and it all works well, java -jar …. brings up the window with the histogram.

So then why is it that when I run lein repl, then try this in the repl I get the error?

user=> (ns hello (:use (incanter core stats charts)))
java.lang.VerifyError: class incanter.core$loading__4347__auto__ overrides final method meta.()Lclojure/lang/IPersistentMap; (NO_SOURCE_FILE:1)

And if I try it a second time, I get this:

hello=> (ns hello (:use (incanter core stats charts)))
java.lang.NoClassDefFoundError: Could not initialize class incanter.core__init (NO_SOURCE_FILE:2)

It’s like lein repl doesn’t use the appropriate classpath??

lein version is 1.1.0 here.

By: liebke

liebke — Tue, 11 May 2010 20:11:52 +0000

I’m glad you solved the problem, and I fixed the namespace on the gist, thanks for pointing that out.

David

By: tzach

tzach — Tue, 11 May 2010 19:18:59 +0000

problem solved!

I jump directly to the incanter-webapp example and use the following project file:
(defproject incanter-webapp “1.0.0-SNAPSHOT”
:description “A simple Incanter web-app.”
:dependencies [[incanter "1.2.3-SNAPSHOT"]
[compojure "0.3.2"]]
:main simple_web_app)

Please note that the git version of the example at
https://gist.github.com/01e4022f6fde08fc5f4b
have the namespace:
simple-web-app
but the post state correctly it should be
simple_web_app

Thanks again for a great work.
This will keep my busy for days and days!

By: tzach

tzach — Tue, 11 May 2010 03:01:39 +0000

Thanks David
appreciate you help.
This did made a change, now the following artifact is missing:

org.clojure:clojure-master:jar:1.1.0-alpha-SNAPSHOT

BTW, this maybe the result of my slow connection, not the procedure at all.

By: liebke

liebke — Sat, 08 May 2010 18:35:59 +0000

The version number scheme for clojure-contrib has recently changed; it no longer contains the word ‘master’ in it. I have updated the post to point to a newer version of Incanter that uses the correct name. So just update your project.clj file to use version 1.2.3-SNAPSHOT, or later, of Incanter:

[incanter "1.2.3-SNAPSHOT"]

Good luck,
David