add source-release.zip distribution

closes #12

Author: hboutemy

pom.xml

@@ -664,6 +664,35 @@ limitations under the License.
       <id>plexus-release</id>
       <build>
         <plugins>
+          <!-- Create a source-release artifact that contains the fully buildable
+               project directory source structure. -->
+          <plugin>
+            <groupId>org.apache.maven.plugins</groupId>
+            <artifactId>maven-assembly-plugin</artifactId>
+            <dependencies>
+              <dependency>
+                <groupId>org.apache.apache.resources</groupId>
+                <artifactId>apache-source-release-assembly-descriptor</artifactId>
+                <version>1.0.6</version>
+              </dependency>
+            </dependencies>
+            <executions>
+              <execution>
+                <id>source-release-assembly</id>
+                <phase>package</phase>
+                <goals>
+                  <goal>single</goal>
+                </goals>
+                <configuration>
+                  <runOnlyAtExecutionRoot>true</runOnlyAtExecutionRoot>
+                  <descriptorRefs>
+                    <descriptorRef>source-release</descriptorRef>
+                  </descriptorRefs>
+                  <tarLongFileMode>posix</tarLongFileMode>
+                </configuration>
+              </execution>
+            </executions>
+          </plugin>
           <plugin>
             <groupId>org.apache.maven.plugins</groupId>
             <artifactId>maven-gpg-plugin</artifactId>