Using the latest version of google closure with clojurescript? - leiningen

Question

How would I get clojurescript and lein-cljsbuild to use the newest version of the google closure instead of last year's version? I would like to use the new features such as the websockets abstraction layer.
I have tried making a jar of the latest copy and installing that using lein-localrepo, but it doesn't seem to have any affect.
Any suggestions?

Answer 1

You can use a different version of the Google Closure compiler simply by excluding its dependency from Clojurescript in your project.clj and adding another version. Here is an alternate version of the example project that comes with lein cljs-build using the latest version of Clojurscript and the Google Closure compiler.
(defproject cljsbuild-example-simple "0.3.4"
:description "A simple example of how to use lein-cljsbuild"
:source-paths ["src-clj"]
:dependencies [[org.clojure/clojure "1.5.1"]
[com.google.javascript/closure-compiler "v20131014"]
[org.clojure/clojurescript "0.0-1934"
:exclusions [org.apache.ant/ant
com.google.javascript/closure-compiler]]
[compojure "1.0.4"]
[hiccup "1.0.0"]]
:plugins [[lein-cljsbuild "0.3.4"]
[lein-ring "0.7.0"]]
:cljsbuild {
:builds [{:source-paths ["src-cljs"]
:compiler {:output-to "resources/public/js/main.js"
:optimizations :whitespace
:pretty-print true}}]}
:ring {:handler example.routes/app})
Which results in this dependency tree:
[clojure-complete "0.2.3" :exclusions [[org.clojure/clojure]]]
[com.google.javascript/closure-compiler "v20131014"]
[args4j "2.0.16"]
[com.google.code.findbugs/jsr305 "1.3.9"]
[com.google.guava/guava "15.0"]
[com.google.protobuf/protobuf-java "2.4.1"]
[org.json/json "20090211"]
[compojure "1.0.4"]
[clout "1.0.1"]
[org.clojure/core.incubator "0.1.0"]
[org.clojure/tools.macro "0.1.0"]
[ring/ring-core "1.1.0"]
[clj-time "0.3.7"]
[joda-time "2.0"]
[commons-codec "1.6"]
[commons-fileupload "1.2.1"]
[commons-io "2.1"]
[javax.servlet/servlet-api "2.5"]
[hiccup "1.0.0"]
[org.clojure/clojure "1.5.1"]
[org.clojure/clojurescript "0.0-1934" :exclusions [[org.apache.ant/ant] [com.google.javascript/closure-compiler]]]
[org.clojure/data.json "0.2.3"]
[org.clojure/google-closure-library "0.0-20130212-95c19e7f0f5f"]
[org.clojure/google-closure-library-third-party "0.0-20130212-95c19e7f0f5f"]
[org.clojure/tools.reader "0.7.9"]
[org.mozilla/rhino "1.7R4"]
[org.clojure/tools.nrepl "0.2.3" :exclusions [[org.clojure/clojure]]]
Then compile it:
$ lein cljsbuild once
Compiling ClojureScript.
Compiling "resources/public/js/main.js" from ["src-cljs"]...
Successfully compiled "resources/public/js/main.js" in 9.181874 seconds.
Hope this helps!