From fec6c18702d4a8d6dd0a5ae943f52fb61be25edc Mon Sep 17 00:00:00 2001
From: Jarl Gullberg <jarl.gullberg@gmail.com>
Date: Mon, 26 Jun 2017 21:05:58 +0200
Subject: [PATCH] Added some early argument verification.

---
 src/Generator.Rewrite/Program.cs | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/Generator.Rewrite/Program.cs b/src/Generator.Rewrite/Program.cs
index 02c44cb1..e866b00f 100644
--- a/src/Generator.Rewrite/Program.cs
+++ b/src/Generator.Rewrite/Program.cs
@@ -38,6 +38,19 @@ namespace OpenTK.Rewrite
                 return;
             }
 
+            // Argument error checking
+            if (!File.Exists(Options.TargetAssembly))
+            {
+                Console.Error.WriteLine($"Target assembly not found. \n" +
+                                        $"Please check the given path ({Options.TargetAssembly}).");
+            }
+
+            if (!File.Exists(Path.ChangeExtension(Options.TargetAssembly, "pdb")))
+            {
+                Console.Error.WriteLine("Debugging symbols for target assembly not found. \n" +
+                                        "Please make sure that debugging symbols are being generated.");
+            }
+
             var program = new Program();
             var file = args[0];
             var key = args[1];