This issue is being tracked as MNG-1851 (http://jira.codehaus.org/browse/MNG-1851), and I think I've got it fixed.

I've deployed a snapshot of the ant tasks with dependencies, here:

http://cvs.apache.org/maven-snapshot-repository/org/apache/maven/maven-artifact-ant/2.0.2-SNAPSHOT/

Would you mind taking it for a spin, to see if it works? If so, it will be part of an emergency release early next week.

Thanks,

John

Matt Raible wrote:
I tried upgrading my Maven 2 Ant Tasks' JAR tonight, and after doing
so, I'm getting the following error:

foxxy:~/dev/equinox mraible$ ant war
Buildfile: build.xml

init:
[artifact:dependencies] An error has occurred while processing the
Maven artifact tasks.
[artifact:dependencies]  Diagnosis:
[artifact:dependencies]
[artifact:dependencies] Unable to build project:
/Users/mraible/Work/equinox/pom.xml
[artifact:dependencies] Duplicate project ID found in
/Users/mraible/Work/equinox/pom.xml

BUILD FAILED
/Users/mraible/Work/equinox/build.xml:27: Unable to build project:
/Users/mraible/Work/equinox/pom.xml

Total time: 2 seconds
foxxy:~/dev/equinox mraible$

I haven't been able to find the "duplicate project id" the error is
referring to.  The strange thing is if I run "mvn package" on my
project, everything works fine with Maven 2.0.1.  If I revert my
maven-artifact-ant-2.0.1-dep.jar to maven-artifact-ant-2.0-dep.jar,
everything works as expected.

Here's how I declare the Maven Ant tasks in my build.xml:

    <target name="init" description="Initializes tasks and downloads
dependencies">
        <typedef resource="org/apache/maven/artifact/ant/antlib.xml"
uri="urn:maven-artifact-ant">
            <classpath>
                <pathelement
location="${basedir}/lib/maven-artifact-ant-2.0-dep.jar" />
            </classpath>
        </typedef>

        <artifact:pom file="pom.xml" id="maven.project"/>

Here's line 27 of build.xml:

        <artifact:dependencies pathId="compile.classpath"
filesetId="compile.fileset" useScope="compile">
            <pom refid="maven.project"/>
        </artifact:dependencies>

Thanks,

Matt

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