feature: Add ApplicationInsights telemetry

Relates to #6021

* Capture (seleted) application telemetry information
* Allow telemetry information capture be toggled via a toolbar button
* Allow telemetry information capture be toggled via the settings dialog

The following information is captured:

Application-Level includes:
* Exception information
* Version number (e.g. 2.0.x.x)
* Is portable version
* Build type (whether the application is an official release build or not)
* Selected layout settings (such as visibility of the left panel,
commit info position etc)
* Change of selected layout settings
* Git version (e.g. 2.19.0)
* SSH client (e.g. OpenSSH or PuTTY)

Operating System-Level includes:
    * Version (e.g. Windows 10.0.17763.0)
    * Machine Name (e.g. MyFastPC)
    * .NET CLR version (e.g. 4.0.30319.42000)
    * .NET SDK version (e.g. dotnet:2.10.0-24102)
    * Current culture
    * Current UI culture
    * Number of monitors
    * Resolution of all monitors
    * Primary monitor DPI / scale factor

GitCommands/Settings/AppSettings.cs

@@ -90,6 +90,12 @@ static AppSettings()
             }
         }
 
+        public static bool TelemetryEnabled
+        {
+            get => GetBool("TelemetryEnabled", true);
+            set => SetBool("TelemetryEnabled", value);
+        }
+
         public static bool AutoNormaliseBranchName
         {
             get => GetBool("AutoNormaliseBranchName", true);

GitExtensions.sln

@@ -159,6 +159,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		GitExtensions.ruleset = GitExtensions.ruleset
 		GitExtensionsTest.ruleset = GitExtensionsTest.ruleset
 		LICENSE.md = LICENSE.md
+		PrivacyPolicy.md = PrivacyPolicy.md
 		README.md = README.md
 	EndProjectSection
 EndProject

GitExtensions/Program.cs

@@ -9,6 +9,7 @@
 using GitUI;
 using GitUI.CommandsDialogs.SettingsDialog;
 using GitUI.CommandsDialogs.SettingsDialog.Pages;
+using GitUI.Infrastructure.Telemetry;
 using JetBrains.Annotations;
 using Microsoft.VisualStudio.Threading;
 using ResourceManager;
@@ -48,6 +49,8 @@ private static void Main()
                     return UserEnvironmentInformation.GetInformation();
                 };
 
+                DiagnosticsClient.Initialize(ThisAssembly.Git.IsDirty);
+
                 if (!Debugger.IsAttached)
                 {
                     AppDomain.CurrentDomain.UnhandledException += NBug.Handler.UnhandledException;
@@ -86,6 +89,9 @@ private static void RunApplication()
             }
 
             AppSettings.LoadSettings();
+
+            new AppStartDiagnosticsReporter().Report();
+
             if (EnvUtils.RunningOnWindows())
             {
                 WebBrowserEmulationMode.SetBrowserFeatureControl();

GitUI/ApplicationInsights.config

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<ApplicationInsights xmlns="http://schemas.microsoft.com/ApplicationInsights/2013/Settings">
+  <InstrumentationKey>2ef275e3-8850-4305-9d7c-825a60c3d296</InstrumentationKey>
+  <TelemetryInitializers>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.DeviceTelemetryInitializer, AppInsights.WindowsDesktop"/>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.SessionTelemetryInitializer, AppInsights.WindowsDesktop"/>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.VersionTelemetryInitializer, AppInsights.WindowsDesktop"/>
+  </TelemetryInitializers>
+  <TelemetryModules>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.DeveloperModeWithDebuggerAttachedTelemetryModule, AppInsights.WindowsDesktop"/>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.UnhandledExceptionTelemetryModule, AppInsights.WindowsDesktop"/>
+    <Add Type="Microsoft.ApplicationInsights.WindowsDesktop.UnobservedExceptionTelemetryModule, AppInsights.WindowsDesktop" />
+    <!--<Add Type="Microsoft.ApplicationInsights.WindowsDesktop.FirstChanceExceptionStatisticsTelemetryModule, AppInsights.WindowsDesktop" />-->
+  </TelemetryModules>
+  <TelemetryProcessors>
+    <Add Type="Microsoft.ApplicationInsights.Extensibility.AutocollectedMetricsExtractor, Microsoft.ApplicationInsights"/>
+  </TelemetryProcessors>
+  <TelemetryChannel Type="Microsoft.ApplicationInsights.Channel.PersistenceChannel, AppInsights.WindowsDesktop"/>
+</ApplicationInsights>

GitUI/CommandsDialogs/FormBrowse.cs

@@ -24,6 +24,7 @@
 using GitUI.CommandsDialogs.BrowseDialog.DashboardControl;
 using GitUI.CommandsDialogs.WorktreeDialog;
 using GitUI.Hotkey;
+using GitUI.Infrastructure.Telemetry;
 using GitUI.Properties;
 using GitUI.Script;
 using GitUI.UserControls;
@@ -98,7 +99,7 @@ public sealed partial class FormBrowse : GitModuleForm, IBrowseRepo
         [CanBeNull] private readonly IAheadBehindDataProvider _aheadBehindDataProvider;
         private readonly WindowsJumpListManager _windowsJumpListManager;
         private readonly SubmoduleStatusProvider _submoduleStatusProvider;
-
+        private readonly FormBrowseDiagnosticsReporter _formBrowseDiagnosticsReporter;
         [CanBeNull] private BuildReportTabPageExtension _buildReportTabPageExtension;
         private ConEmuControl _terminal;
         private Dashboard _dashboard;
@@ -131,6 +132,8 @@ public FormBrowse([NotNull] GitUICommands commands, string filter, ObjectId sele
         {
             InitializeComponent();
 
+            _formBrowseDiagnosticsReporter = new FormBrowseDiagnosticsReporter(this);
+
             commandsToolStripMenuItem.DropDownOpening += CommandsToolStripMenuItem_DropDownOpening;
 
             MainSplitContainer.Visible = false;
@@ -506,6 +509,9 @@ protected override void OnLoad(EventArgs e)
 
             toolStripButtonPush.Initialize(_aheadBehindDataProvider);
             toolStripButtonPush.DisplayAheadBehindInformation(Module.GetSelectedBranch());
+            tsbtnEnableTelemetry.Checked = AppSettings.TelemetryEnabled;
+
+            _formBrowseDiagnosticsReporter.Report();
 
             base.OnLoad(e);
         }
@@ -641,6 +647,8 @@ private void ShowDashboard()
             _dashboard.RefreshContent();
             _dashboard.Visible = true;
             _dashboard.BringToFront();
+
+            DiagnosticsClient.TrackPageView("Dashboard");
         }
 
         private void HideDashboard()
@@ -658,6 +666,8 @@ private void HideDashboard()
             toolPanel.LeftToolStripPanelVisible = true;
             toolPanel.RightToolStripPanelVisible = true;
             toolPanel.ResumeLayout();
+
+            DiagnosticsClient.TrackPageView("Revision graph");
         }
 
         private void UpdatePluginMenu(bool validWorkingDir)
@@ -2985,12 +2995,18 @@ private void toolStripMenuItemReflog_Click(object sender, EventArgs e)
         private void toggleSplitViewLayout_Click(object sender, EventArgs e)
         {
             AppSettings.ShowSplitViewLayout = !AppSettings.ShowSplitViewLayout;
+            DiagnosticsClient.TrackEvent("Layout change",
+                new Dictionary<string, string> { { nameof(AppSettings.ShowSplitViewLayout), AppSettings.ShowSplitViewLayout.ToString() } });
+
             RefreshSplitViewLayout();
         }
 
         private void toggleBranchTreePanel_Click(object sender, EventArgs e)
         {
             MainSplitContainer.Panel1Collapsed = !MainSplitContainer.Panel1Collapsed;
+            DiagnosticsClient.TrackEvent("Layout change",
+                new Dictionary<string, string> { { "ShowLeftPanel", MainSplitContainer.Panel1Collapsed.ToString() } });
+
             RefreshLayoutToggleButtonStates();
         }
 
@@ -3016,13 +3032,19 @@ private void CommitInfoPositionClick(object sender, EventArgs e)
         private void SetCommitInfoPosition(CommitInfoPosition position)
         {
             AppSettings.CommitInfoPosition = position;
+            DiagnosticsClient.TrackEvent("Layout change",
+                new Dictionary<string, string> { { nameof(AppSettings.CommitInfoPosition), AppSettings.CommitInfoPosition.ToString() } });
+
             LayoutRevisionInfo();
             RefreshLayoutToggleButtonStates();
         }
 
         private void RefreshSplitViewLayout()
         {
             RightSplitContainer.Panel2Collapsed = !AppSettings.ShowSplitViewLayout;
+            DiagnosticsClient.TrackEvent("Layout change",
+                new Dictionary<string, string> { { nameof(AppSettings.ShowSplitViewLayout), AppSettings.ShowSplitViewLayout.ToString() } });
+
             RefreshLayoutToggleButtonStates();
         }
 
@@ -3194,5 +3216,10 @@ private void FormBrowse_DragEnter(object sender, DragEventArgs e)
                 e.Effect = DragDropEffects.Move;
             }
         }
+
+        private void TsbtnEnableTelemetry_Click(object sender, EventArgs e)
+        {
+            AppSettings.TelemetryEnabled = tsbtnEnableTelemetry.Checked;
+        }
     }
 }

GitUI/CommandsDialogs/SettingsDialog/Pages/GeneralSettingsPage.cs

@@ -1,5 +1,6 @@
 using System;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using GitCommands;
@@ -38,7 +39,8 @@ protected override void OnRuntimeLoad()
             base.OnRuntimeLoad();
 
             // align 1st columns across all tables
-            tlpnlBehaviour.AdjustWidthToSize(0, lblCommitsLimit, lblDefaultCloneDestination);
+            tlpnlBehaviour.AdjustWidthToSize(0, lblDefaultCloneDestination);
+            tlpnlTelemetry.AdjustWidthToSize(0, lblDefaultCloneDestination);
         }
 
         private void SetSubmoduleStatus()
@@ -69,6 +71,8 @@ protected override void SettingsToPage()
             cbDefaultCloneDestination.Text = AppSettings.DefaultCloneDestinationPath;
             chkFollowRenamesInFileHistoryExact.Checked = AppSettings.FollowRenamesInFileHistoryExactOnly;
             SetSubmoduleStatus();
+
+            chkTelemetry.Checked = AppSettings.TelemetryEnabled;
         }
 
         protected override void PageToSettings()
@@ -92,6 +96,8 @@ protected override void PageToSettings()
 
             AppSettings.DefaultCloneDestinationPath = cbDefaultCloneDestination.Text;
             AppSettings.FollowRenamesInFileHistoryExactOnly = chkFollowRenamesInFileHistoryExact.Checked;
+
+            AppSettings.TelemetryEnabled = chkTelemetry.Checked;
         }
 
         private static Func<Repository, string> GetParentPath()
@@ -127,5 +133,10 @@ private void ShowGitStatus_CheckedChanged(object sender, System.EventArgs e)
         {
             SetSubmoduleStatus();
         }
+
+        private void LlblTelemetryPrivacyLink_LinkClicked(object sender, System.Windows.Forms.LinkLabelLinkClickedEventArgs e)
+        {
+            Process.Start("https://github.com/gitextensions/gitextensions/blob/master/PrivacyPolicy.md");
+        }
     }
 }

GitUI/GitModuleForm.cs

@@ -2,6 +2,7 @@
 using System.ComponentModel;
 using System.Windows.Forms;
 using GitCommands;
+using GitUI.Infrastructure.Telemetry;
 using GitUI.Script;
 using JetBrains.Annotations;
 
@@ -62,6 +63,7 @@ protected GitModuleForm([NotNull] GitUICommands commands)
             : base(enablePositionRestore: true)
         {
             _uiCommands = commands;
+            DiagnosticsClient.TrackPageView(GetType().FullName);
         }
 
         protected override CommandStatus ExecuteCommand(int command)