Index: src/main/java/org/apache/maven/plugin/assembly/mojos/AbstractAssemblyMojo.java
===================================================================
--- src/main/java/org/apache/maven/plugin/assembly/mojos/AbstractAssemblyMojo.java	(revision 633439)
+++ src/main/java/org/apache/maven/plugin/assembly/mojos/AbstractAssemblyMojo.java	(working copy)
@@ -324,43 +324,46 @@
                     MavenProject project = getProject();
                     String classifier = getClassifier();
 
-                    if ( attach && destFile.isFile() )
+                    if ( attach )
                     {
-                        if ( isAssemblyIdAppended() )
+                        if ( destFile.isFile() )
                         {
-                            projectHelper.attachArtifact( project, format, assembly.getId(), destFile );
-                        }
-                        else if ( classifier != null )
-                        {
-                            projectHelper.attachArtifact( project, format, classifier, destFile );
-                        }
-                        else
-                        {
-                            if ( !warnedAboutMainProjectArtifact )
+                            if ( isAssemblyIdAppended() )
                             {
-                                StringBuffer message = new StringBuffer();
+                                projectHelper.attachArtifact( project, format, assembly.getId(), destFile );
+                            }
+                            else if ( classifier != null )
+                            {
+                                projectHelper.attachArtifact( project, format, classifier, destFile );
+                            }
+                            else
+                            {
+                                if ( !warnedAboutMainProjectArtifact )
+                                {
+                                    StringBuffer message = new StringBuffer();
 
-                                message.append( "Configuration options: 'appendAssemblyId' is set to false, and 'classifier' is missing." );
-                                message.append( "\nInstead of attaching the assembly file: " ).append( destFile ).append( ", it will become the file for main project artifact." );
-                                message.append( "\nNOTE: If multiple descriptors or descriptor-formats are provided for this project, the value of this file will be non-deterministic!" );
+                                    message.append( "Configuration options: 'appendAssemblyId' is set to false, and 'classifier' is missing." );
+                                    message.append( "\nInstead of attaching the assembly file: " ).append( destFile ).append( ", it will become the file for main project artifact." );
+                                    message.append( "\nNOTE: If multiple descriptors or descriptor-formats are provided for this project, the value of this file will be non-deterministic!" );
 
-                                getLog().warn( message );
-                                warnedAboutMainProjectArtifact = true;
-                            }
+                                    getLog().warn( message );
+                                    warnedAboutMainProjectArtifact = true;
+                                }
 
-                            File existingFile = project.getArtifact().getFile();
-                            if ( ( existingFile != null ) && existingFile.exists() )
-                            {
-                                getLog().warn( "Replacing pre-existing project main-artifact file: " + existingFile + "\nwith assembly file: " + destFile );
+                                File existingFile = project.getArtifact().getFile();
+                                if ( ( existingFile != null ) && existingFile.exists() )
+                                {
+                                    getLog().warn( "Replacing pre-existing project main-artifact file: " + existingFile + "\nwith assembly file: " + destFile );
+                                }
+
+                                project.getArtifact().setFile( destFile );
                             }
-
-                            project.getArtifact().setFile( destFile );
                         }
+                        else
+                        {
+                            getLog().warn( "Assembly file: " + destFile + " is not a regular file (it may be a directory). It cannot be attached to the project build for installation or deployment." );
+                        }
                     }
-                    else
-                    {
-                        getLog().warn( "Assembly file: " + destFile + " is not a regular file (it may be a directory). It cannot be attached to the project build for installation or deployment." );
-                    }
                 }
             }
             catch ( ArchiveCreationException e )