Git Requirement Check

Commands/GitRequiredInterceptor.cs

@@ -0,0 +1,52 @@
+using CliWrap;
+using CliWrap.Buffered;
+using Spectre.Console;
+using Spectre.Console.Cli;
+
+namespace FCPModUpdater.Commands;
+
+public sealed class GitRequiredInterceptor : ICommandInterceptor
+{
+    public void Intercept(CommandContext context, CommandSettings settings)
+    {
+        if (IsGitInstalled()) return;
+        
+        // It wasn't installed..
+        AnsiConsole.MarkupLine("[yellow]This application requires Git to manage mods.[/]");
+        AnsiConsole.WriteLine();
+        AnsiConsole.MarkupLine("Install Git from: [link]https://git-scm.com/downloads[/]");
+
+        throw new GitNotFoundException();
+    }
+
+    private static bool IsGitInstalled()
+    {
+        try
+        {
+            var result = Cli.Wrap("git")
+                .WithArguments("--version")
+                .WithValidation(CommandResultValidation.None)
+                .ExecuteBufferedAsync()
+                .GetAwaiter()
+                .GetResult();
+
+            return result.ExitCode == 0;
+        }
+        catch
+        {
+            return false;
+        }
+    }
+}
+
+public class GitNotFoundException : Exception
+{
+    public GitNotFoundException() 
+        : base("Git is not installed or not found in PATH.") { }
+    
+    public GitNotFoundException(string message) 
+        : base(message) { }
+    
+    public GitNotFoundException(string message, Exception inner) 
+        : base(message, inner) { }
+}

Program.cs

@@ -9,6 +9,7 @@ app.Configure(config =>
 {
     config.SetApplicationName("fcp-mod-manager");
     config.SetApplicationVersion("1.0.0");
+    config.SetInterceptor(new GitRequiredInterceptor());
 
     config.AddCommand<ScanCommand>("scan")
         .WithDescription("Scan mods and show interactive menu (DEFAULT)")