[MPLUGIN-299] Help mojo cannot display goal details

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.4
• Fix Version/s: 3.5
• Assignee: Robert Scholte
• Reporter: Harald Wellmann
• Created: 11/Apr/16 10:00
• Updated: 12/Aug/16 21:01
• Resolved: 12/Aug/16 20:19

Description

Given a Mojo with @Parameter annotations without any further annotation arguments like property or defaultValue, when invoking the generated help mojo for details

mvn myplugin:help -Dgoal=mygoal -Ddetail=true

then the Mojo fails with a NullPointerException:

Caused by: java.lang.NullPointerException
        at org.ops4j.pax.warp.maven.HelpMojo.findNamedChild(HelpMojo.java:203)
        at org.ops4j.pax.warp.maven.HelpMojo.findSingleChild(HelpMojo.java:218)
        at org.ops4j.pax.warp.maven.HelpMojo.writeParameter(HelpMojo.java:276)
        at org.ops4j.pax.warp.maven.HelpMojo.writeGoal(HelpMojo.java:264)
        at org.ops4j.pax.warp.maven.HelpMojo.execute(HelpMojo.java:164)
        at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)