Friend requires old version of ring

[JulioBarros]

Friend specifies an old version of ring that does not have the head middleware needed by compojure.route causing:

"Caused by: java.io.FileNotFoundException: Could not locate ring/middleware/head__init.class or ring/middleware/head.clj on classpath:"

• Sorry if this is not really an issue I'm not yet quite sure how to resolve all these various dependencies. Thanks.

[cemerick]

Interesting; the later dependency that compojure requires should override friend's. I am loathe to change Friend's ring dependency version, as it actually doesn't require anything newer.

What version of Leiningen are you using? If you're using Leiningen 1.x, try deleting lib within your project, and run lein deps to resolve dependencies again.

[JulioBarros]

I'm using

Leiningen 2.0.0-preview6 on Java 1.6.0_33 Java HotSpot(TM) 64-Bit Server VM

was able to work around it with an exclusion

[com.cemerick/friend "0.0.9" :exclusions [ring/ring-core]]

Julio

On Jun 26, 2012, at 11:29 AM, Chas Emerick reply@reply.github.com wrote:

Interesting; the later dependency that compojure requires should override friend's. I am loathe to change Friend's ring dependency version, as it actually doesn't require anything newer.

What version of Leiningen are you using? If you're using Leiningen 1.x, try deleting lib within your project, and run lein deps to resolve dependencies again.

---

Reply to this email directly or view it on GitHub:
#15 (comment)

[xeqi]

I explored this briefly in case it was a lein/pomegranate issue when it was mentioned in irc. It can be reproduced with:

:dependencies [[org.clojure/clojure "1.4.0"]
                 [com.cemerick/friend "0.0.9"]
                 [noir "1.3.0-beta9"]

Dependency trees:

vagrant@natty64:/workspace/tmp/blah$ lein deps :tree
 [com.cemerick/friend "0.0.9"]
   [commons-codec "1.6"]
   [net.sourceforge.nekohtml/nekohtml "1.9.10"]
     [xerces/xercesImpl "2.8.1"]
       [xml-apis "1.3.03"]
   [org.apache.httpcomponents/httpclient "4.2-beta1"]
     [org.apache.httpcomponents/httpcore "4.2-beta1"]
   [org.clojure/core.incubator "0.1.0"]
   [org.mindrot/jbcrypt "0.3m"]
   [org.openid4java/openid4java-nodeps "0.9.6"]
     [com.google.code.guice/guice "2.0"]
     [commons-logging "1.1.1"]
     [net.jcip/jcip-annotations "1.0"]
   [ring/ring-core "1.0.2"]
     [commons-fileupload "1.2.1"]
     [commons-io "1.4"]
     [javax.servlet/servlet-api "2.5"]
   [robert/hooke "1.1.2"]
   [slingshot "0.10.2"]
 [noir "1.3.0-beta9"]
   [bultitude "0.1.5"]
   [clj-stacktrace "0.2.4"]
   [compojure "1.0.4"]
     [clout "1.0.1"]
   [hiccup "1.0.0"]
   [lib-noir "0.1.0"]
     [cheshire "4.0.0"]
       [com.fasterxml.jackson.core/jackson-core "2.0.0"]
       [com.fasterxml.jackson.dataformat/jackson-dataformat-smile "2.0.0"]
   [org.clojure/tools.macro "0.1.1"]
   [ring "1.1.1"]
     [ring/ring-devel "1.1.1"]
       [ns-tracker "0.1.1"]
         [org.clojure/tools.namespace "0.1.0"]
           [org.clojure/java.classpath "0.1.0"]
     [ring/ring-jetty-adapter "1.1.1"]
       [org.eclipse.jetty/jetty-server "7.6.1.v20120215"]
         [org.eclipse.jetty.orbit/javax.servlet "2.5.0.v201103041518"]
         [org.eclipse.jetty/jetty-continuation "7.6.1.v20120215"]
         [org.eclipse.jetty/jetty-http "7.6.1.v20120215"]
           [org.eclipse.jetty/jetty-io "7.6.1.v20120215"]
             [org.eclipse.jetty/jetty-util "7.6.1.v20120215"]
     [ring/ring-servlet "1.1.1"]
 [org.clojure/clojure "1.4.0"]

[INFO] blah:blah:jar:0.1.0-SNAPSHOT
[INFO] +- org.clojure:clojure:jar:1.4.0:compile
[INFO] +- com.cemerick:friend:jar:0.0.9:compile
[INFO] |  +- ring:ring-core:jar:1.0.2:compile
[INFO] |  |  +- commons-io:commons-io:jar:1.4:compile
[INFO] |  |  +- commons-fileupload:commons-fileupload:jar:1.2.1:compile
[INFO] |  |  \- javax.servlet:servlet-api:jar:2.5:compile
[INFO] |  +- slingshot:slingshot:jar:0.10.2:compile
[INFO] |  +- robert:hooke:jar:1.1.2:compile
[INFO] |  +- org.clojure:core.incubator:jar:0.1.0:compile
[INFO] |  +- org.mindrot:jbcrypt:jar:0.3m:compile
[INFO] |  +- commons-codec:commons-codec:jar:1.6:compile
[INFO] |  +- org.openid4java:openid4java-nodeps:jar:0.9.6:compile
[INFO] |  |  +- commons-logging:commons-logging:jar:1.1.1:compile
[INFO] |  |  +- com.google.code.guice:guice:jar:2.0:compile
[INFO] |  |  \- net.jcip:jcip-annotations:jar:1.0:compile
[INFO] |  +- net.sourceforge.nekohtml:nekohtml:jar:1.9.10:compile
[INFO] |  |  \- xerces:xercesImpl:jar:2.8.1:compile
[INFO] |  |     \- xml-apis:xml-apis:jar:1.3.03:compile
[INFO] |  \- org.apache.httpcomponents:httpclient:jar:4.2-beta1:compile
[INFO] |     \- org.apache.httpcomponents:httpcore:jar:4.2-beta1:compile
[INFO] \- noir:noir:jar:1.3.0-beta9:compile
[INFO]    +- lib-noir:lib-noir:jar:0.1.0:compile
[INFO]    |  \- cheshire:cheshire:jar:4.0.0:compile
[INFO]    |     +- com.fasterxml.jackson.core:jackson-core:jar:2.0.0:compile
[INFO]    |     \- com.fasterxml.jackson.dataformat:jackson-dataformat-smile:jar:2.0.0:compile
[INFO]    +- compojure:compojure:jar:1.0.4:compile
[INFO]    |  \- clout:clout:jar:1.0.1:compile
[INFO]    +- bultitude:bultitude:jar:0.1.5:compile
[INFO]    +- ring:ring:jar:1.1.1:compile
[INFO]    |  +- ring:ring-devel:jar:1.1.1:compile
[INFO]    |  |  \- ns-tracker:ns-tracker:jar:0.1.1:compile
[INFO]    |  |     \- org.clojure:tools.namespace:jar:0.1.0:compile
[INFO]    |  |        \- org.clojure:java.classpath:jar:0.1.0:compile
[INFO]    |  +- ring:ring-jetty-adapter:jar:1.1.1:compile
[INFO]    |  |  \- org.eclipse.jetty:jetty-server:jar:7.6.1.v20120215:compile
[INFO]    |  |     +- org.eclipse.jetty.orbit:javax.servlet:jar:2.5.0.v201103041518:compile
[INFO]    |  |     +- org.eclipse.jetty:jetty-continuation:jar:7.6.1.v20120215:compile
[INFO]    |  |     \- org.eclipse.jetty:jetty-http:jar:7.6.1.v20120215:compile
[INFO]    |  |        \- org.eclipse.jetty:jetty-io:jar:7.6.1.v20120215:compile
[INFO]    |  |           \- org.eclipse.jetty:jetty-util:jar:7.6.1.v20120215:compile
[INFO]    |  \- ring:ring-servlet:jar:1.1.1:compile
[INFO]    +- hiccup:hiccup:jar:1.0.0:compile
[INFO]    +- clj-stacktrace:clj-stacktrace:jar:0.2.4:compile
[INFO]    \- org.clojure:tools.macro:jar:0.1.1:compile

Both pomegranate/mvn get the same thing so I wasn't concerned about it being a bug. I think it happens because MavenRepositorySystemSession uses a NearestVersionConflictResolver as part of its DependencyGraphTransformer. I think the NearestVersionConflictResolver ends up choosing ring/core 1.0.2 because it is only one level deep in transitive dependencies.

[cemerick]

Using [com.cemerick/friend "$VERSION" :exclusions [ring/ring-core]] will have to be the "official" workaround until something can be done to smooth this general problem over in Leiningen (see nrepl/drawbridge#8 for another example).