Maven antrun with sequential ant-contrib fails to run

Question

We have a special routine to explode files in a subfolder into extensions, which will be copied and jared into single extension files. For this special approach I wanted to

Answer 1

I too wasted several hours on this one, because antcontrib for task could not be found.

Finally, I found out that for task in not defined in antcontrib.properties, but in antlib.xml!

antcontrib.properties is a pre ant 1.6 way of doing things – the modern way is to use antlib.xml.

So, this is a maven 3.5, ant 1.8, working example:

<plugin>
    <artifactId>maven-antrun-plugin</artifactId>
    <dependencies>
        <dependency>
            <groupId>ant-contrib</groupId>
            <artifactId>ant-contrib</artifactId>
            <version>1.0b3</version>
            <exclusions>
                <exclusion>
                    <groupId>ant</groupId>
                    <artifactId>ant</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
    </dependencies>

    <execution>
        <id>deploy_to_distrib_folder</id>
        <phase>package</phase>
        <configuration>

            <target>
                <taskdef resource="net/sf/antcontrib/antlib.xml" />

                <macrodef name="deploy_extra_dir">
                    <attribute name="dir" />
                    <sequential>
                        <basename property="basename" file="@{dir}" />
                        <sync todir="${outputDir}/${basename}">
                            <fileset dir="@{dir}" />
                        </sync>
                        <var name="basename" unset="true" />
                    </sequential>
                </macrodef>

                <for param="dir">
                    <path>
                        <dirset dir="${project.build.directory}/maven-shared-archive-resources" includes="*" />
                    </path>
                    <sequential>
                        <deploy_extra_dir dir="@{dir}" />
                    </sequential>
                </for>

            </target>
        </configuration>
        <goals>
            <goal>run</goal>
        </goals>
    </execution>
</plugin>

---

Hope this helps!

Answer 2

Therefore I wasted at least one hour to find the error a little hint below ...

I use maven3 and the rest as described above, BUT I have to use maven.dependency.classpath instead of maven.plugin.classpath! Otherwise maven won't find the contrib tasks. Hope this helps anybody.

Answer 3

It looks like you're missing the taskdef that's needed to declare the ant-contrib tasks, so that Ant knows about them, hence this part of the error message:

Problem: failed to create task or type for

(It would perhaps be a little clearer if the failed task - 'for' - were quoted.)

One way to add the taskdef is to insert it immediately prior to the for loop:

<target>
    <taskdef resource="net/sf/antcontrib/antlib.xml"
             classpathref="maven.plugin.classpath" />
    <for param="extension">
    ...

Answer 4

After wasting 2 hours and reading too many answers, this is what I need to check

http://www.thinkplexx.com/learn/howto/maven2/plugins/could-not-load-definitions-from-resource-antlib-xml-understanding-the-problem-and-fix-worklow

I printed all the maven classpaths using this

<property name="compile_classpath" refid="maven.compile.classpath"/>
<property name="runtime_classpath" refid="maven.runtime.classpath"/>
<property name="test_classpath" refid="maven.test.classpath"/>
<property name="plugin_classpath" refid="maven.plugin.classpath"/>
<echo message="compile classpath: ${compile_classpath}"/>
<echo message="runtime classpath: ${runtime_classpath}"/>
<echo message="test classpath:    ${test_classpath}"/>
<echo message="plugin classpath:  ${plugin_classpath}"/>

and checked which classpath contains antrib jar file. So I changed classpathhref to maven.runtime.classpath from maven.plugin.classpath . So my taskdef is

<taskdef resource="net/sf/antcontrib/antcontrib.properties" classpathref="maven.runtime.classpath" />

and the dependencies

<dependency>
  <groupId>ant-contrib</groupId>
  <artifactId>ant-contrib</artifactId>
  <version>1.0b3</version>
  <exclusions>
       <exclusion>
          <groupId>ant</groupId>
          <artifactId>ant</artifactId>
       </exclusion>
  </exclusions>
</dependency>
<dependency>
  <groupId>org.apache.ant</groupId>
  <artifactId>ant-nodeps</artifactId>
  <version>1.8.1</version>
</dependency>