Description Fred Bricon 2014-02-02 08:02:59 EST

"Maven > Assign to working set..." menu appears on non-maven projects as there's no visibility constraint on org.eclipse.m2e.core.ui\plugin.xml :

      <objectContribution
            adaptable="true"
            id="org.eclipse.m2e.assignWorkingSet"
            objectClass="org.eclipse.core.resources.IProject">
         <action
               class="org.eclipse.m2e.core.ui.internal.actions.AssignWorkingSetAction"
               id="org.eclipse.m2e.createWorkingSet"
               label="%action.assignWorkingSet.label"
               menubarPath="org.eclipse.m2e.core.mavenMenu/assignWorkingSet">
         </action>
      </objectContribution>

It should be 

      <objectContribution
            adaptable="true"
            id="org.eclipse.m2e.assignWorkingSet"
            objectClass="org.eclipse.core.resources.IProject">
         <action
               class="org.eclipse.m2e.core.ui.internal.actions.AssignWorkingSetAction"
               id="org.eclipse.m2e.createWorkingSet"
               label="%action.assignWorkingSet.label"
               menubarPath="org.eclipse.m2e.core.mavenMenu/assignWorkingSet">
         </action>
         <visibility>
           <and>
             <objectState name="open" value="true"/>
             <objectState name="nature" value="org.eclipse.m2e.core.maven2Nature"/>
           </and>
         </visibility>
      </objectContribution>