add comandline option excluddir to Prebuild, to make easier to use older xml files that did not excluse folders like obj from the project

Prebuild/src/Core/Kernel.cs

@@ -100,6 +100,7 @@ namespace Prebuild.Core
         bool m_PauseAfterFinish;
         string[] m_ProjectGroups;
 
+        public HashSet<string> excludeFolders = new HashSet<string>(StringComparer.InvariantCultureIgnoreCase);
         #endregion
 
         #region Constructors
@@ -673,7 +674,7 @@ namespace Prebuild.Core
             }
             m_Clean = m_CommandLine["clean"];
             string removeDirs = m_CommandLine["removedir"];
-            if (removeDirs != null && removeDirs.Length == 0)
+            if (!string.IsNullOrEmpty(removeDirs))
             {
                 m_RemoveDirectories = removeDirs.Split('|');
             }
@@ -685,6 +686,20 @@ namespace Prebuild.Core
             }
             m_PauseAfterFinish = m_CommandLine.WasPassed("pause");
 
+            string excludeDirstr = m_CommandLine["excludedir"];
+            if (!string.IsNullOrEmpty(excludeDirstr))
+            {
+                string[] ex = excludeDirstr.Split(new char[] {'|'}, StringSplitOptions.RemoveEmptyEntries);
+                if(ex.Length > 0)
+                {
+                    foreach(string s in ex)
+                    {
+                        string st = s.Trim();
+                        if(st.Length > 0)
+                            excludeFolders.Add(st);
+                    }
+                }
+            }
             //LoadSchema();
         }
 

Prebuild/src/Core/Nodes/MatchNode.cs

@@ -261,6 +261,9 @@ namespace Prebuild.Core.Nodes
                             // a significant performance hit when running on a network drive.
                             if (str.EndsWith(".svn"))
                                 continue;
+                            string dname = Path.GetFileName(str);
+                            if(Kernel.Instance.excludeFolders.Contains(dname))
+                                continue;
 
                             RecurseDirectories(Helper.NormalizePath(str), pattern, recurse, useRegex, exclusions);
                         }
@@ -345,7 +348,6 @@ namespace Prebuild.Core.Nodes
                 throw new WarningException("Could not compile regex pattern: {0}", ex.Message);
             }
 
-
             foreach (XmlNode child in node.ChildNodes)
             {
                 IDataNode dataNode = Kernel.Instance.ParseNode(child, this);