NEXUS-4878 - Add reason to not deletable error

nexus/nexus-app/src/main/java/org/sonatype/nexus/configuration/application/DefaultNexusConfiguration.java

@@ -811,8 +811,7 @@ public synchronized void deleteRepository( String id )
 
             if ( repository.getId().equals( shadow.getMasterRepository().getId() ) )
             {
-                throw new ConfigurationException( "The repository with ID " + id
-                    + " is not deletable, it has dependant repositories!" );
+                throw new RepositoryDependentException( repository, shadow );
             }
         }
 

nexus/nexus-app/src/main/java/org/sonatype/nexus/configuration/application/RepositoryDependentException.java

@@ -0,0 +1,44 @@
+package org.sonatype.nexus.configuration.application;
+
+import static java.lang.String.format;
+import static org.sonatype.nexus.proxy.utils.RepositoryStringUtils.getHumanizedNameString;
+
+import org.sonatype.configuration.ConfigurationException;
+import org.sonatype.nexus.proxy.repository.Repository;
+
+public class RepositoryDependentException
+    extends ConfigurationException
+{
+
+    private static final long serialVersionUID = -2037859093869479166L;
+
+    private final Repository dependant;
+
+    private final Repository repository;
+
+    public RepositoryDependentException( Repository repository, Repository dependant )
+    {
+        super( format( "Repository %s cannot be deleted due to dependency: repository %s.",
+            getHumanizedNameString( repository ), getHumanizedNameString( dependant ) ) );
+        this.repository = repository;
+        this.dependant = dependant;
+    }
+
+    public Repository getDependant()
+    {
+        return dependant;
+    }
+
+    public Repository getRepository()
+    {
+        return repository;
+    }
+
+    public String getUIMessage()
+    {
+        return format(
+            "Repository '%s' cannot be deleted due to dependencies on repository '%s'.\nDependencies must be removed in order to complete this operation.",
+            getHumanizedNameString( repository ), getHumanizedNameString( dependant ) );
+    }
+
+}

nexus/nexus-rest-api/src/main/java/org/sonatype/nexus/rest/repositories/RepositoryPlexusResource.java

@@ -32,6 +32,7 @@
 import org.restlet.resource.ResourceException;
 import org.restlet.resource.Variant;
 import org.sonatype.configuration.ConfigurationException;
+import org.sonatype.nexus.configuration.application.RepositoryDependentException;
 import org.sonatype.nexus.proxy.AccessDeniedException;
 import org.sonatype.nexus.proxy.NoSuchRepositoryException;
 import org.sonatype.nexus.proxy.StorageException;
@@ -377,12 +378,17 @@ public void delete( Context context, Request request, Response response )
 
             response.setStatus( Status.SUCCESS_NO_CONTENT );
         }
+        catch ( RepositoryDependentException e )
+        {
+            getLogger().info( e.getMessage() );
+
+            throw new ResourceException( Status.CLIENT_ERROR_BAD_REQUEST, e.getUIMessage(), e );
+        }
         catch ( ConfigurationException e )
         {
-            getLogger().warn( "Repository not deletable, it has dependants, id=" + repoId );
+            getLogger().warn( e.getMessage() );
 
-            throw new ResourceException( Status.CLIENT_ERROR_BAD_REQUEST,
-                                         "Repository is not deletable, it has dependants." );
+            throw new ResourceException( Status.CLIENT_ERROR_BAD_REQUEST, e.getMessage(), e );
         }
         catch ( NoSuchRepositoryAccessException e )
         {

nexus/nexus-webapp/src/main/webapp/js/repoServer/repoServer.RepoMaintPanel.js

@@ -276,6 +276,27 @@ Sonatype.repoServer.RepositoryPanel = function(config) {
 
 Ext.extend(Sonatype.repoServer.RepositoryPanel, Sonatype.panels.GridViewer, {
 
+	      deleteRecord : function(rec) {
+        Ext.Ajax.request({
+              callback : function(options, success, response) {
+                if (success)
+                {
+                  this.dataStore.remove(rec);
+                }
+                else
+                {
+                	var options = {
+                		hideErrorStatus : true
+                	};
+                  Sonatype.utils.connectionError(response, 'Delete request could not be completed!', false, options);
+                }
+              },
+              scope : this,
+              method : 'DELETE',
+              url : rec.data.resourceURI
+            });
+      },
+
       applyBookmark : function(bookmark) {
         this.updatingBookmark = true;
         if (this.groupStore.lastOptions == null)