Maven GWT Plugin copies multiple versions of the same snapshot jars - gwt

Question

I have this issue where I build my project (mvn clean install), some of the transitive dependencies are snapshot versions and are downloaded and copied into the target webapp directory e.g XXXUtil-1.0-20110922.172721-52.jar. Then when I run mvn gwt:run, it finds uses XXXUtil-1.0-SNAPSHOT.jar and copies it to the target webapp directory. I can't figure out why this is happening. In doesn't matter whether I run as exploded or inplace.
<plugins>
<!-- GWT Maven Plugin -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>gwt-maven-plugin</artifactId>
<version>2.3.0-1</version>
<executions>
<execution>
<goals>
<goal>compile</goal>
<goal>i18n</goal>
<goal>generateAsync</goal>
</goals>
</execution>
</executions>
<configuration>
<runTarget>Shell.html</runTarget>
<hostedWebapp>${webappDirectory}</hostedWebapp>
<i18nMessagesBundle>com.myapp.client.Messages</i18nMessagesBundle>
</configuration>
<dependencies>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-user</artifactId>
<version>${gwt.version}</version>
</dependency>
<dependency>
<groupId>com.google.gwt</groupId>
<artifactId>gwt-dev</artifactId>
<version>${gwt.version}</version>
</dependency>
</dependencies>
</plugin>
<!-- Copy static web files before executing gwt:run -->
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.1.1</version>
<executions>
<execution>
<phase>compile</phase>
<goals>
<goal>exploded</goal>
</goals>
</execution>
</executions>
<configuration>
<!-- <outputFileNameMapping>#{artifactId}#-#{version}#.#{extension}#</outputFileNameMapping> -->
<webappDirectory>${webappDirectory}</webappDirectory>
</configuration>
</plugin>
</plugins>
None of the suggestions described here help:
http://www.tikalk.com/alm/forums/maven-war-plugin-picking-multiple-version-same-snapshot-jars.
If i build local snapshots of XXXUtil-1.0-SNAPSHOT.jar it works buts not when downloading snapshots from a nexus repository. Another way to look at it is like this Project A generates a WAR, and depends on B.jar, which depends on C.jar. When i build my war using mvn install, it generates the correct jars in WEB-INF/lib so we have C-1.0-20110922.172721-52.jar. Which is correct and it works if i deploy my war. If i run in hosted mode using eclipse, its fine. But when i run mvn:gwt-run, C-1.0-SNAPSHOT.jar is copied into WEB-INF/lib so i have 2 jars C-1.0-SNAPSHOT.jar and C-1.0-20110922.172721-52.jar.

Answer 1

The only thing I can suggest you is to try to debug maven-gwt-plugin.
Checkout it from git repository
https://github.com/gwt-maven-plugin/gwt-maven-plugin.git

Answer 2

I had exactly the same problem. After debugging, I removed the use of maven-war-plugin and added maven-resources-plugin (compile phase, copy-resources goal). I tried gwt:run and install after that, worked without any problems. This way, we avoid the dependencies getting copied twice.