Eclipse Helios + maven m2e + Groovy == FAIL - eclipse

Question

Ever since I've installed the new m2e plugin for maven, my Groovy project no longer builds. I'm using the groovy-compiler-plugin as described here. I get the old "plugin execution not covered..." error for the maven-compiler-plugin. I've tried both execute and ignore for the goals "testCompile" and "compile" as described in the error.
I can't use GMaven due to some arcane compiler issues. I also am locked to Maven 2.2.1 due to my company's build process. The old m2eclipse plugin is gone, and the documentation for m2e is atrocious.
I am at my wits end with this. Nowhere else do I see this issue. I can't be the only one.
If I can't find a solution to this very soon, I'm either scrapping maven for some hacked Gradle implementation (though I can't use that either), or I'm moving over to NetBeans, which is not a winning proposition.
As requested, the pom snippet is below.
<build>
<plugins>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>build-helper-maven-plugin</artifactId>
<version>1.5</version>
<executions>
<execution>
<id>add-source</id>
<phase>generate-sources</phase>
<goals>
<goal>add-source</goal>
</goals>
<configuration>
<sources>
<source>src/main/groovy</source>
</sources>
</configuration>
</execution>
<execution>
<id>add-test-source</id>
<phase>generate-test-sources</phase>
<goals>
<goal>add-test-source</goal>
</goals>
<configuration>
<sources>
<source>src/test/groovy</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<verbose>true</verbose>
<source>1.6</source>
<target>1.6</target>
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>1.8.0-03</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.5.1</version>
<exclusions>
<exclusion>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</plugin>
</plugins>
<pluginManagement>
<plugins>
<!--This plugin's configuration is used to store Eclipse m2e settings only. It has no influence on the Maven build itself.-->
<plugin>
<groupId>org.eclipse.m2e</groupId>
<artifactId>lifecycle-mapping</artifactId>
<version>1.0.0</version>
<configuration>
<lifecycleMappingMetadata>
<pluginExecutions>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<versionRange>[2.3.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute />
</action>
</pluginExecution>
<pluginExecution>
<pluginExecutionFilter>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<versionRange>[2.5.1,)</versionRange>
<goals>
<goal>testCompile</goal>
<goal>compile</goal>
</goals>
</pluginExecutionFilter>
<action>
<execute />
</action>
</pluginExecution>
</pluginExecutions>
</lifecycleMappingMetadata>
</configuration>
</plugin>
</plugins>
</pluginManagement>
</build>

Answer 1

First, you must install the correct configurator. I am assuming that you are using m2e version 1.0. If that is the case, then you must install the newer version of the Groovy-Eclipse configurator for m2e. At this update site:
http://dist.codehaus.org/groovy/distributions/greclipse/snapshot/e3.6/
(do not use the groovy-m2eclipse-new update site. It is outdated and will go away soon.)
I haven't done extensive testing for the configurator on Eclipse 3.6, but it should work. I do recommend that you upgrade to Eclipse Indigo because things will generally work better on Indigo.
Second, you need to fix your pom.xml. Remove the reference to the org.eclipse.m2e plugin.

Answer 2

Take a look at the following link I posted in groovy user group. Note, I used spring STS which is just a better eclipse. I am also pasting my pom for a test suite for your reference, please note the sourceincludes element carefully. I was also at my wits end trying to fix this, but it definitely works now. Also, please make sure that the maven in eclipse points to the same one you installed in your machine otherwise it can also cause issues.
[Update] Also install either of the following plugins depending on your eclipse version to provide Groovy - Maven integration
http://dist.codehaus.org/groovy/distributions/greclipse/groovy-m2eclipse-new/ or
http://dist.codehaus.org/groovy/distributions/greclipse/groovy-m2eclipse/
<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>com.example.org</groupId>
<artifactId>test-suite</artifactId>
<packaging>jar</packaging>
<version>1.0-SNAPSHOT</version>
<name>test-suite</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<repositories>
<repository>
<id>jetlang.googlecode.com</id>
<name>Jetlang Repository for Maven</name>
<url>http://jetlang.googlecode.com/svn/repo/</url>
</repository>
</repositories>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>3.8.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.testng</groupId>
<artifactId>testng</artifactId>
<version>6.1.1</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.ws</groupId>
<artifactId>spring-ws-core</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.ws</groupId>
<artifactId>spring-ws-support</artifactId>
<version>2.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
<version>3.0.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>3.0.5.RELEASE</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jetlang</groupId>
<artifactId>jetlang</artifactId>
<version>0.2.5</version>
</dependency>
<!-- Database pool -->
<dependency>
<groupId>c3p0</groupId>
<artifactId>c3p0</artifactId>
<version>0.9.1.2</version>
</dependency>
<!-- ORACLE database driver -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc5</artifactId>
<version>11.2.0.1.0</version>
</dependency>
<dependency>
<groupId>jdom</groupId>
<artifactId>jdom</artifactId>
<version>1.0</version>
</dependency>
<dependency>
<groupId>jaxen</groupId>
<artifactId>jaxen</artifactId>
<version>1.1</version>
</dependency>
<dependency>
<groupId>xalan</groupId>
<artifactId>xalan</artifactId>
<version>2.7.1</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.14</version>
</dependency>
<!-- Groovy jar -->
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>1.8.0</version>
<type>jar</type>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.1</version>
<configuration>
<compilerId>groovy-eclipse-compiler</compilerId>
<compilerArgument>nowarn</compilerArgument>
<!--<verbose>true</verbose> -->
</configuration>
<dependencies>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-compiler</artifactId>
<version>2.5.1-1</version>
</dependency>
<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy-eclipse-batch</artifactId>
<version>1.8.0-03</version>
</dependency>
</dependencies>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-eclipse-plugin</artifactId>
<version>2.8</version>
<configuration>
<additionalProjectnatures>
<projectnature>org.eclipse.jdt.groovy.core.groovyNature</projectnature>
</additionalProjectnatures>
<sourceIncludes>
<sourceInclude>**/*.groovy</sourceInclude>
</sourceIncludes>
</configuration>
</plugin>
</plugins>
</build>