Added hash only mode for compairing files. Fixed verbose logging.

KuduSync.NET/FileInfoBaseExtensions.cs

@@ -19,5 +19,14 @@ public static string ComputeSha1(this FileInfoBase file)
                 return BitConverter.ToString(sha1.ComputeHash(fileStream));
             }
         }
+
+        public static string ComputeSha256(this FileInfoBase file)
+        {
+            using (var fileStream = file.OpenRead())
+            {
+                var sha256 = new SHA256Managed();
+                return BitConverter.ToString(sha256.ComputeHash(fileStream));
+            }
+        }
     }
 }

KuduSync.NET/KuduSync.cs

@@ -65,6 +65,17 @@ public KuduSync(KuduSyncOptions options, Logger logger)
             {
                 _to = Path.Combine(_to, _targetSubFolder);
             }
+
+            if (_options.HashOnly)
+            {
+                _logger.Log("Hash only mode ON");
+            }
+
+            if (_options.Verbose)
+            {
+                _logger.Log("Verbose logging ON");
+            }
+
         }
 
         private bool TryCleanupToBeDeletedDirectory()
@@ -121,13 +132,12 @@ public void Run()
             _nextManifest.SaveManifestFile();
 
             TryCleanupToBeDeletedDirectory();
+
+            _logger.Log("Kudusync.NET Complete");
         }
 
-        private void SmartCopy(string sourcePath,
-                               string destinationPath,
-                               string targetSubFolder,
-                               DirectoryInfoBase sourceDirectory,
-                               DirectoryInfoBase destinationDirectory)
+        //Main method
+        private void SmartCopy(string sourcePath,string destinationPath,string targetSubFolder,DirectoryInfoBase sourceDirectory,DirectoryInfoBase destinationDirectory)
         {
             if (IgnorePath(sourceDirectory))
             {
@@ -165,6 +175,7 @@ private void SmartCopy(string sourcePath,
 
                 // Trim the start destinationFilePath
                 string previousPath = FileSystemHelpers.GetRelativePath(destinationPath, destFile.FullName);
+
                 if (!sourceFilesLookup.ContainsKey(destFile.Name) && DoesPathExistsInManifest(previousPath, targetSubFolder))
                 {
                     _logger.Log("Deleting file: '{0}'", previousPath);
@@ -184,26 +195,43 @@ private void SmartCopy(string sourcePath,
                 // if the file exists in the destination then only copy it again if it's
                 // last write time is different than the same file in the source (only if it changed)
                 FileInfoBase targetFile;
-                if (destFilesLookup.TryGetValue(sourceFile.Name, out targetFile) &&
-                    sourceFile.LastWriteTimeUtc == targetFile.LastWriteTimeUtc)
-                {
-                    continue;
-                }
+
+                var details = FileSystemHelpers.GetRelativePath(sourcePath, sourceFile.FullName) + (_options.CopyMetaData ? " " + ShorthandAttributes(sourceFile) : String.Empty);
 
                 string path = FileSystemHelpers.GetDestinationPath(sourcePath, destinationPath, sourceFile);
 
-                var details = FileSystemHelpers.GetRelativePath(sourcePath, sourceFile.FullName) + (_options.CopyMetaData ? " " + ShorthandAttributes(sourceFile) : String.Empty);
+                switch (_options.HashOnly)
+                {
+                    case true:  //behaviour added by JWC on 8/11/2016
+                        if (destFilesLookup.TryGetValue(sourceFile.Name, out targetFile) && sourceFile.ComputeSha256() == targetFile.ComputeSha256())  //if destination contins file, and the hash matched
+                        {
+                            _logger.Log("Hash match on {0}, will not copy", details);
+                            //move to next iteration if file the same
+                            continue;
+                        }
+                        break;
+                    case false:
+                        if (destFilesLookup.TryGetValue(sourceFile.Name, out targetFile) && sourceFile.LastWriteTimeUtc == targetFile.LastWriteTimeUtc)  //if destination contains file, and the time matches
+                        {
+                            //move to next iteration if file the same
+                            continue;
+                        }
+                        break;
+                }
+
+                //if file is not the same, the code below executes
 
                 if (sourceFile.IsWebConfig())
                 {
-                    // If current file is web.config check the content sha1.
-                    if (!destFilesLookup.TryGetValue(sourceFile.Name, out targetFile) ||
-                        !sourceFile.ComputeSha1().Equals(targetFile.ComputeSha1()))
-                    {
+                    // If current file is web.config check the content sha256.
+
+                    //if (!destFilesLookup.TryGetValue(sourceFile.Name, out targetFile) && !sourceFile.ComputeSha256().Equals(targetFile.ComputeSha256()))  //if destination does not contain file OR the hash matches
+                    //{
                         // Save the file path to copy later for copying web.config forces an appDomain
                         // restart right away without respecting waitChangeNotification
                         _filesToCopyLast.Add(Tuple.Create(sourceFile, path, details));
-                    }
+                    //}
+
                     continue;
                 }
 

KuduSync.NET/KuduSyncOptions.cs

@@ -39,15 +39,18 @@ public class KuduSyncOptions : CommandLineOptionsBase
         [Option("q", "quiet", Required = false, HelpText = "No logging")]
         public bool Quiet { get; set; }
 
-        [Option("v", "verbose", Required = false, HelpText = "Verbose logging with maximum number of output lines")]
-        public int? Verbose { get; set; }
+        [Option("v", "verbose",  DefaultValue = false, Required = false, HelpText = "Verbose logging with maximum number of output lines")]
+        public bool Verbose { get; set; }
 
         [Option("w", "whatIf", Required = false, HelpText = "Only log without actual copy/remove of files")]
         public bool WhatIf { get; set; }
 
         [Option("", "perf", Required = false, HelpText = "Print out the time it took to complete KuduSync operation")]
         public bool Perf { get; set; }
 
+        [Option("h", "hashOnly", DefaultValue = false, Required = false, HelpText = "Compare files by contents only using SHA256")]
+        public bool HashOnly { get; set; }
+
         [HelpOption]
         public string GetUsage()
         {

KuduSync.NET/Logger.cs

@@ -1,5 +1,7 @@
 using System;
+using System.Diagnostics;
 using System.IO;
+using System.Runtime.Remoting.Messaging;
 using System.Text;
 
 namespace KuduSync.NET
@@ -19,15 +21,34 @@ public class Logger : IDisposable
         /// <param name="maxLogLines">sets the verbosity, 0 is verbose, less is quiet, more is the number of maximum log lines to write.</param>
         public Logger(int maxLogLines)
         {
-            var stream = Console.OpenStandardOutput();
-            _writer = new StreamWriter(stream);
+            Stream stream = Console.OpenStandardOutput();
+            _writer = new KuduSyncLogger(stream);
             _maxLogLines = maxLogLines;
         }
 
+
+        public class KuduSyncLogger : StreamWriter
+        {
+            public KuduSyncLogger(Stream stream): base(stream)
+            {
+
+
+            }
+
+            public override void WriteLine(string value)
+            {
+                Debug.WriteLine(value);
+                base.WriteLine(value);
+            }
+        }
+
+
+
         public void Log(string format, params object[] args)
         {
             bool logged = false;
 
+
             if (_maxLogLines == 0 || _logCounter < _maxLogLines)
             {
                 _writer.WriteLine(format, args);

KuduSync.NET/Program.cs

@@ -53,9 +53,9 @@ private static Logger GetLogger(KuduSyncOptions kuduSyncOptions)
             {
                 maxLogLines = -1;
             }
-            else if (kuduSyncOptions.Verbose != null)
+            else if (kuduSyncOptions.Verbose)
             {
-                maxLogLines = kuduSyncOptions.Verbose.Value;
+                maxLogLines = int.MaxValue;
             }
             else
             {