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Editorial Team
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Asked: 2026-05-31T02:19:44+00:00

I know it’s possible to create a war file using lein ring war ,

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I know it’s possible to create a war file using lein ring war, but it seems to still include jetty dependencies. Is there a way to exclude the jetty dependencies when I’m building the war (and deploying on tomcat)?

If I can’t does this matter at all or is it just extra jars/class files that are packaged up into the war but never actually used?

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  1. Editorial Team

    Leinigen supports :exclusions in a dependency.

    (defproject my-project "1.0.0"
     :dependencies [[org.clojure/clojure "1.2.0"]
                    [org.clojure/clojure-contrib "1.2.0"]]
     :dev-dependencies [[autodoc "0.7.1" :exclusions [org.apache.ant/ant]]])

    See here for details.

    Often the problem is working out where the dependencies are coming from. In maven you can do this:

    mvn dependency:tree

    to get a useful ASCII art representation of the dependency tree.

    One option would be to generate a pom.xml for your project using 

    lein pom

    Then runing maven over that.

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