Error while executing a maven goal

[Anil Kumar]

While executing the maven goal I am getting an error message "[INFO] One or more required plugin parameters are invalid/missing for 'build-helper:add-source' [0] Inside the definition for plugin 'build-helper-maven-plugin' specify the following:

<configuration>
...
<sources>VALUE</sources>
</configuration> ".
Command given for executing the maven goal from command prompt.

mvn org.codehaus.mojo:build-helper-maven-plugin:add-source

Stack Trace

+ Error stacktraces are turned on.
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building  Project
[INFO]    task-segment: [org.codehaus.mojo:build-helper-maven-plugin:add-source]
[INFO] ------------------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] One or more required plugin parameters are invalid/missing for 'build-helper:add-source'

[0] Inside the definition for plugin 'build-helper-maven-plugin' specify the following:

<configuration>
  ...
  <sources>VALUE</sources>
</configuration>.

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException: Error configuring: org.codehaus.mojo:build-helper-maven-plugin. Reason: Invalid or missing parameters: [Mojo parameter [name: 'sources'; alias: 'null']] for mojo: org.codehaus.mojo:build-helper-maven-plugin:1.3:add-source
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:588)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(DefaultLifecycleExecutor.java:513)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:483)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.java:331)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:292)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:142)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:301)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:585)
	at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
	at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
	at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
	at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.PluginParameterException: Error configuring: org.codehaus.mojo:build-helper-maven-plugin. Reason: Invalid or missing parameters: [Mojo parameter [name: 'sources'; alias: 'null']] for mojo: org.codehaus.mojo:build-helper-maven-plugin:1.3:add-source
	at org.apache.maven.plugin.DefaultPluginManager.checkRequiredParameters(DefaultPluginManager.java:1044)
	at org.apache.maven.plugin.DefaultPluginManager.getConfiguredMojo(DefaultPluginManager.java:661)
	at org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:431)
	at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:559)
	... 16 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Wed Oct 28 15:39:36 IST 2009
[INFO] Final Memory: 3M/508M
[INFO] ------------------------------------------------------------------------

Code snippet (POM.xml file )

  

<build>
  <plugins>
     <plugin>
   	<groupId>org.codehaus.mojo</groupId>
	<artifactId>build-helper-maven-plugin</artifactId>
	<version>1.3</version>
	<executions>
	  <execution>
	  	<phase>generate-sources</phase>	        
	        <goals>
	        <goal>add-source</goal>
	        </goals>	        
	        <configuration>
	        <sources>	      
		<source> </source> // Path of the source files 
		</sources>
	        </configuration>
	    </execution>
	   </executions>
   </plugin>  
  </plugins>	
	<outputDirectory>classes</outputDirectory>
</build>

PS : If I give "mvn compile " command the required source are compiled successfully.

[Martijn Verburg]

Why are you needing to use that build helper plugin?

[Anil Kumar]

To add multiple source directory to the POM. My requirement was like initially I will compile all the files coming under my project source directory. Finally at the time of making the jar I need to selectively include and exclude certain files. The files which are to be included and excluded comes under my project source directory. Is there a better way to do this ? . Kindly let me know.

[Martijn Verburg]

Ok, in that case you have to provide the path to your alternatve source in your <source> section

[Anil Kumar]

I had already added the path in the source tag .Coming back to the question. Why is that the goal is not executing ?.
Can you please help me out ?

[Jaikiran Pai]

My requirement was like initially I will compile all the files coming under my project source directory. Finally at the time of making the jar I need to selectively include and exclude certain files. The files which are to be included and excluded comes under my project source directory. Is there a better way to do this ? . Kindly let me know.

Try out the maven-assembly-plugin which allows a lot of customizations to the artifact output http://maven.apache.org/plugins/maven-assembly-plugin/

[Anil Kumar]

Jaikiran Pai wrote:

My requirement was like initially I will compile all the files coming under my project source directory. Finally at the time of making the jar I need to selectively include and exclude certain files. The files which are to be included and excluded comes under my project source directory. Is there a better way to do this ? . Kindly let me know.

Try out the maven-assembly-plugin which allows a lot of customizations to the artifact output http://maven.apache.org/plugins/maven-assembly-plugin/

I will try it out and let you know. Thanks