From 987ab9641945f5cec6483567bc0ca7f45c959958 Mon Sep 17 00:00:00 2001
From: "Dmitrij D. Czarkoff" <czarkoff@gmail.com>
Date: Sun, 3 Nov 2024 16:12:56 +0100
Subject: [PATCH] feature: support Visual Studio external tool on Windows

---
 README.md                  |  1 +
 src/Models/ExternalTool.cs |  5 +++++
 src/Native/Windows.cs      | 20 ++++++++++++++++++++
 3 files changed, 26 insertions(+)

diff --git a/README.md b/README.md
index 52383670..44ed5917 100644
--- a/README.md
+++ b/README.md
@@ -127,6 +127,7 @@ This app supports open repository in external tools listed in the table below.
 | JetBrains Fleet               | YES     | YES   | YES   | FLEET                          |
 | Sublime Text                  | YES     | YES   | YES   | SUBLIME_TEXT                   |
 | Zed                           | NO      | YES   | YES   | ZED                            |
+| Visual Studio                 | YES     | YES   | YES   | VISUALSTUDIO                   |
 
 > [!NOTE]
 > This app will try to find those tools based on some pre-defined or expected locations automatically. If you are using one portable version of these tools, it will not be detected by this app.
diff --git a/src/Models/ExternalTool.cs b/src/Models/ExternalTool.cs
index b26a9a90..50691081 100644
--- a/src/Models/ExternalTool.cs
+++ b/src/Models/ExternalTool.cs
@@ -154,6 +154,11 @@ namespace SourceGit.Models
             TryAdd("Zed", "zed", "\"{0}\"", "ZED", platformFinder);
         }
 
+        public void VisualStudio(Func<string> platformFinder)
+        {
+            TryAdd("Visual Studio", "vs", "\"{0}\"", "VISUALSTUDIO", platformFinder);
+        }
+
         public void FindJetBrainsFromToolbox(Func<string> platformFinder)
         {
             var exclude = new List<string> { "fleet", "dotmemory", "dottrace", "resharper-u", "androidstudio" };
diff --git a/src/Native/Windows.cs b/src/Native/Windows.cs
index 6ca0bbb0..0563644c 100644
--- a/src/Native/Windows.cs
+++ b/src/Native/Windows.cs
@@ -134,6 +134,7 @@ namespace SourceGit.Native
             finder.Fleet(() => $"{Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)}\\Programs\\Fleet\\Fleet.exe");
             finder.FindJetBrainsFromToolbox(() => $"{Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData)}\\JetBrains\\Toolbox");
             finder.SublimeText(FindSublimeText);
+            finder.VisualStudio(FindVisualStudio);
             return finder.Founded;
         }
 
@@ -313,6 +314,25 @@ namespace SourceGit.Native
 
             return string.Empty;
         }
+
+        private string FindVisualStudio()
+        {
+            var localMachine = Microsoft.Win32.RegistryKey.OpenBaseKey(
+                    Microsoft.Win32.RegistryHive.LocalMachine,
+                    Microsoft.Win32.RegistryView.Registry64);
+
+            // Get default class for VisualStudio.Launcher.sln - the handler for *.sln files
+            if (localMachine.OpenSubKey(@"SOFTWARE\Classes\VisualStudio.Launcher.sln\CLSID") is Microsoft.Win32.RegistryKey launcher)
+            {
+                // Get actual path to the executable
+                if (launcher.GetValue(string.Empty) is string CLSID && localMachine.OpenSubKey(@$"SOFTWARE\Classes\CLSID\{CLSID}\LocalServer32") is Microsoft.Win32.RegistryKey devenv && devenv.GetValue(string.Empty) is string localServer32)
+                {
+                    return localServer32!.Trim('\"');
+                }
+            }
+
+            return string.Empty;
+        }
         #endregion
 
         private void OpenFolderAndSelectFile(string folderPath)