[m2] Antrun / Javac

[Giles, Nick]

I'm having distinct problems with the Antrun plugin for Maven2,
specifically with the inheritance of properties and environment
variables. With a simple test where the pom.xml calls a build.xml, which
then uses javac, Ant complains about not being able to find
com.sun.tools.javac.Main on the classpath. This isn't the usual Ant
problem that gives that message, because Ant will run fine from the
command line, it's an inheritance from Maven problem. With the files
described below, I get a negligible classpath in the Maven part of the
operation, and a null classpath in the Ant part. If I run the buildfile
from the commandline, I get a full and proper classpath, and execution
works.

Does anyone have any idea how I can get this to work, and why it does
work in one of my projects, but I'm scared to change it to try and find
out why, because I'll never get it back to working again...

Cheers,

Nick

====

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>workbench</groupId>
  <artifactId>workbench</artifactId>
  <packaging>jar</packaging>
  <version>1.0-SNAPSHOT</version>


  <build>
    <sourceDirectory>.</sourceDirectory>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-antrun-plugin</artifactId>
        <executions>
          <execution>
            <phase>generate-sources</phase>
            <configuration>
              <tasks>
                <echo message="Classpath in Antrun task =
${java.class.path}"/>
                <ant antfile="build.xml" dir="." inheritAll="true" >
                </ant>
              </tasks>
            </configuration>
            <goals>
              <goal>run</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

</project>

======

Build.xml:

<project name="Workbench" default="run" basedir=".">

  <target name="run" depends="clean,compile">
    <java classname="Workbench" />
  </target>

  <target name="compile">
    <echo message="Classpath in Ant: ${java.class.path}" />
    <javac srcdir="." />
  </target>

  <target name="clean">
    <delete>
      <fileset dir=".">
        <include name="*.class" />
      </fileset>
    </delete>
  </target>

</project>


=====

Workbench.java:


public class Workbench {

    public static void main(String[] args) {
        System.out.println("Hello");
    }

}
 
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