m2eclipse and/or wtp not packaging a dependency correctly?

Question

Eclipse Indigo SR 1, wtp 3.3.0, m2eclipse 1.0.100.

When publishing a project to WTP, I'm getting strange behavior with one of the dependencies; instead of putting the jar in the WEB-INF/lib folder, it's creating a folder named for the expected jar, and then putting the source tree (apparently) from that project under that folder. I can't see anything in the dependency's pom.xml or this project's pom.xml that could be causing this.

Other dependencies are being brought over just fine, as jars.

My test project's pom.xml:

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>test</groupId>
  <artifactId>dwhwtptest</artifactId>
  <packaging>war</packaging>
  <version>0.0.1-SNAPSHOT</version>
  <name>dwhwtptest Maven Webapp</name>
  <url>http://maven.apache.org</url>
  <dependencies>
    <dependency>
      <groupId>org.onebusaway</groupId>
      <artifactId>onebusaway-nyc-transit-data</artifactId>
      <version>2.0.3-SNAPSHOT</version>
    </dependency>
  </dependencies>
  <build>
    <finalName>dwhwtptest</finalName>
  </build>
</project>

Here's what ends up being published at workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps:

$ find  dwhwtptest/
dwhwtptest/
dwhwtptest//index.jsp
dwhwtptest//META-INF
dwhwtptest//META-INF/MANIFEST.MF
dwhwtptest//META-INF/maven
dwhwtptest//META-INF/maven/test
dwhwtptest//META-INF/maven/test/dwhwtptest
dwhwtptest//META-INF/maven/test/dwhwtptest/pom.properties
dwhwtptest//META-INF/maven/test/dwhwtptest/pom.xml
dwhwtptest//WEB-INF
dwhwtptest//WEB-INF/lib
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/META-INF
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/META-INF/MANIFEST.MF
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/model
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/model/NycQueuedInferredLocationBean.java
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/model/NycVehicleManagementStatusBean.java
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/services
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/services/ConfigurationService.java
dwhwtptest//WEB-INF/lib/onebusaway-nyc-transit-data-2.0.3-SNAPSHOT.jar/org/onebusaway/nyc/transit_data/services/VehicleTrackingManagementService.java
dwhwtptest//WEB-INF/web.xml

And here's the pom.xml for the dependency, the onebusaway-nyc-transit-data module:

<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>
    <parent>
        <artifactId>onebusaway-nyc</artifactId>
        <groupId>org.onebusaway</groupId>
        <version>2.0.3-SNAPSHOT</version>
    </parent>
    <groupId>org.onebusaway</groupId>
    <artifactId>onebusaway-nyc-transit-data</artifactId>
    <packaging>jar</packaging>

    <name>onebusaway-nyc-transit-data</name>
    <description>Common interfaces and classes for exchanging transit data between UI front-end and transit back-end data sources.</description>

    <build>
        <finalName>onebusaway-nyc-transit-data</finalName>
    </build>
</project>

Suggestions? Anything else I can investigate to try to figure out what's going on here?

Answer 1

A colleague of mine provided me an approach that fixed the issue, but it requires few manual steps.

• remove the project from your eclipse

• go to your maven root folder with a terminal and kill all the eclipse stuff using this command (you will have to do this twice):

  $> find . -iname ".settings" -exec rm -rf '{}' \; ; find . -iname ".project" -exec rm -rf '{}' \; ; find . -iname ".classpath" -exec rm -rf '{}'

• on your maven root, execute this command:

  $> mvn -Dwtpversion=2.0 eclipse:eclipse

• import your project back in eclipse: everything will now work and eclipse will be publishing jars containing code :)

HTH, Bruno (credits to Theodore!)

Answer 2

I suggest trying out the m2e-wtp plugin in addition to your currently installed m2e plugin (which doesn't contain support for WTP based projects) This plugin is available in the Eclipse Marketplace via the embedded Marketplace client or on the web (http://marketplace.eclipse.org/content/maven-integration-eclipse-wtp). It provides a tighter Maven integration with WTP and should improve the overall Maven with WTP experience.