All dependencies get packaged into jar

[georgewfraser]

All the classes from dependencies end up in the packaged jar. This is different than the default of maven, and not what you want when you intend to publish the project to a maven repository and consume it in another project.

Minimal pom.xml that reproduces the error:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.fivetran</groupId>
    <artifactId>clojure-sandbox</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>clojure</packaging>

    <dependencies>
        <!-- Clojure language runtime -->
        <dependency>
            <groupId>org.clojure</groupId>
            <artifactId>clojure</artifactId>
            <version>1.6.0</version>
        </dependency>

        <!-- Fancy clojure JSON / Jackson wrapper -->
        <dependency>
            <groupId>cheshire</groupId>
            <artifactId>cheshire</artifactId>
            <version>5.3.1</version>
        </dependency>
    </dependencies>

    <build>
        <sourceDirectory>src</sourceDirectory>

        <testSourceDirectory>test</testSourceDirectory>

        <plugins>
            <!-- Teach maven about clojure -->
            <plugin>
                <groupId>com.theoryinpractise</groupId>
                <artifactId>clojure-maven-plugin</artifactId>
                <version>1.3.20</version>
                <extensions>true</extensions>

                <configuration>
                    <sourceDirectories>
                        <sourceDirectory>src</sourceDirectory>
                    </sourceDirectories>

                    <testSourceDirectories>
                        <testSourceDirectory>test</testSourceDirectory>
                    </testSourceDirectories>
                </configuration>
            </plugin>
        </plugins>
    </build>

</project>

[talios]

This is a long long LONG standing bug/issue in clojure itself - it will write out ALL namespaces it compiles to the output directory ( http://dev.clojure.org/jira/browse/CLJ-322 ).

I thought we'd had a work-around inplace to delete the foreign namespaces but it looks like we don't. Shouldn't be hard to add tho. I wonder how other people get around this currently.

[anthcourtney]

Are there any suggested (i.e. tried and tested) workarounds for this behaviour?

[talios]

I keep meaning to put some time aside to update the plugin to have a "delete undiscovered namespaces" option which, after compilation will simply delete the any .class files it doesn't know about ( or more, to be a good citazen, compile to a temporary folder, and then copy only the .class files related to the discovered namespaces ).

As yet I've not had the time - pull requests welcome tho.

[talios]

Hopefully I can find some time to put aside whilst on Xmas holidays to look at this...

[laurentpetit]

Please note that for libraries, it is not recommended to AOT compile, anyway.
For final projects, to the contrary, it may be interesting to have all classes, including dependencies, AOT compiled and included.

[laurentpetit]

However, there may still be the need to remove some namespace aot classes (for instance, some namespaces are so dynamic that they can't work if they're aot compiled, but they may be aot compiled transitively and must then be removed after the fact).

[laurentpetit]

I have this problem with cider-nrepl and CCW.
I'm working on a patch for clojure-maven-plugin which does just the following: if a cleanAOTNamespaces configuration parameter is set to true - it's false by default -, then the <namespaces> regexes are used to remove undesired classes

[laurentpetit]

The PR has been published: #98