attached the file backup pruner to listen to connection file save events

resolves #1020

CHANGELOG.TXT

@@ -3,6 +3,7 @@
 Fixes:
 ------
 #1030: Exception thrown if importing from port scan and no tree node is selected
+#1020: BackupFileKeepCount setting not limiting backup file count
 #1004: Duplicating root or PuTTy node through hotkey causes unhandled exception
 #1002: Disabling filtering without clearing keyword leaves filtered state
 #1001: Connection tree context menu hotkeys stop working and disappear in some cases

mRemoteV1/App/Runtime.cs

@@ -4,7 +4,6 @@ using System.Security;
 using System.Threading;
 using System.Windows.Forms;
 using mRemoteNG.App.Info;
-using mRemoteNG.Config.DataProviders;
 using mRemoteNG.Config.Putty;
 using mRemoteNG.Connection;
 using mRemoteNG.Credential;
@@ -78,12 +77,6 @@ namespace mRemoteNG.App
                     {
                         connectionFileName = ConnectionsService.GetStartupConnectionFileName();
                     }
-
-                    var backupFileCreator = new FileBackupCreator();
-                    backupFileCreator.CreateBackupFile(connectionFileName);
-
-                    var backupPruner = new FileBackupPruner();
-                    backupPruner.PruneBackupFiles(connectionFileName);
                 }
 
                 ConnectionsService.LoadConnections(Settings.Default.UseSQLServer, false, connectionFileName);

mRemoteV1/Config/DataProviders/FileBackupPruner.cs

@@ -1,26 +1,29 @@
-using System;
-using System.IO;
+using System.IO;
+using System.Linq;
 
 namespace mRemoteNG.Config.DataProviders
 {
     public class FileBackupPruner
     {
-        public void PruneBackupFiles(string baseName)
+        public void PruneBackupFiles(string filePath, int maxBackupsToKeep)
         {
-            var fileName = Path.GetFileName(baseName);
-            var directoryName = Path.GetDirectoryName(baseName);
+            var fileName = Path.GetFileName(filePath);
+            var directoryName = Path.GetDirectoryName(filePath);
 
-            if (string.IsNullOrEmpty(fileName) || string.IsNullOrEmpty(directoryName)) return;
+            if (string.IsNullOrEmpty(fileName) || string.IsNullOrEmpty(directoryName))
+                return;
 
             var searchPattern = string.Format(mRemoteNG.Settings.Default.BackupFileNameFormat, fileName, "*");
             var files = Directory.GetFiles(directoryName, searchPattern);
 
-            if (files.Length <= mRemoteNG.Settings.Default.BackupFileKeepCount) return;
+            if (files.Length <= maxBackupsToKeep)
+                return;
 
-            Array.Sort(files);
-            Array.Resize(ref files, files.Length - mRemoteNG.Settings.Default.BackupFileKeepCount);
+            var filesToDelete = files
+                .OrderByDescending(s => s)
+                .Skip(maxBackupsToKeep);
 
-            foreach (var file in files)
+            foreach (var file in filesToDelete)
             {
                 File.Delete(file);
             }

mRemoteV1/UI/Forms/frmMain.cs

@@ -14,6 +14,7 @@ using mRemoteNG.App.Info;
 using mRemoteNG.App.Initialization;
 using mRemoteNG.Config;
 using mRemoteNG.Config.Connections;
+using mRemoteNG.Config.DataProviders;
 using mRemoteNG.Config.Putty;
 using mRemoteNG.Config.Settings;
 using mRemoteNG.Connection;
@@ -31,7 +32,7 @@ using WeifenLuo.WinFormsUI.Docking;
 
 namespace mRemoteNG.UI.Forms
 {
-	public partial class FrmMain
+    public partial class FrmMain
     {
         public static FrmMain Default { get; } = new FrmMain();
 
@@ -46,6 +47,7 @@ namespace mRemoteNG.UI.Forms
         private ConnectionInfo _selectedConnection;
         private readonly IList<IMessageWriter> _messageWriters = new List<IMessageWriter>();
         private readonly ThemeManager _themeManager;
+        private readonly FileBackupPruner _backupPruner = new FileBackupPruner();
 
         internal FullscreenHandler Fullscreen { get; set; }
         
@@ -159,6 +161,7 @@ namespace mRemoteNG.UI.Forms
                 SetDefaultLayout();
 
             Runtime.ConnectionsService.ConnectionsLoaded += ConnectionsServiceOnConnectionsLoaded;
+            Runtime.ConnectionsService.ConnectionsSaved += ConnectionsServiceOnConnectionsSaved;
             var credsAndConsSetup = new CredsAndConsSetup();
             credsAndConsSetup.LoadCredsAndCons();
 
@@ -217,6 +220,14 @@ namespace mRemoteNG.UI.Forms
             UpdateWindowTitle();
         }
 
+        private void ConnectionsServiceOnConnectionsSaved(object sender, ConnectionsSavedEventArgs connectionsSavedEventArgs)
+        {
+            if (connectionsSavedEventArgs.UsingDatabase)
+                return;
+
+            _backupPruner.PruneBackupFiles(connectionsSavedEventArgs.ConnectionFileName, Settings.Default.BackupFileKeepCount);
+        }
+
         private void SetMenuDependencies()
         {
             var connectionInitiator = new ConnectionInitiator();