Add -V/--version

Fixes #531

Author: xPaw

DepotDownloader/Program.cs

@@ -20,6 +20,7 @@ static async Task<int> Main(string[] args)
         {
             if (args.Length == 0)
             {
+                PrintVersion();
                 PrintUsage();
 
                 if (OperatingSystem.IsWindowsVersionAtLeast(5, 0))
@@ -38,18 +39,24 @@ static async Task<int> Main(string[] args)
 
             #region Common Options
 
+            // Not using HasParameter because it is case insensitive
+            if (args.Length == 1 && (args[0] == "-V" || args[0] == "--version"))
+            {
+                PrintVersion(true);
+                return 0;
+            }
+
             if (HasParameter(args, "-debug"))
             {
+                PrintVersion(true);
+
                 DebugLog.Enabled = true;
                 DebugLog.AddListener((category, message) =>
                 {
                     Console.WriteLine("[{0}] {1}", category, message);
                 });
 
                 var httpEventListener = new HttpDiagnosticEventListener();
-
-                DebugLog.WriteLine("DepotDownloader", "Version: {0}", Assembly.GetExecutingAssembly().GetName().Version);
-                DebugLog.WriteLine("DepotDownloader", "Runtime: {0}", RuntimeInformation.FrameworkDescription);
             }
 
             var username = GetParameter<string>(args, "-username") ?? GetParameter<string>(args, "-user");
@@ -417,5 +424,18 @@ static void PrintUsage()
             Console.WriteLine("  -max-downloads <#>       - maximum number of chunks to download concurrently. (default: 8).");
             Console.WriteLine("  -loginid <#>             - a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.");
         }
+
+        static void PrintVersion(bool printExtra = false)
+        {
+            var version = typeof(Program).Assembly.GetCustomAttribute<AssemblyInformationalVersionAttribute>().InformationalVersion;
+            Console.WriteLine($"DepotDownloader v{version}");
+
+            if (!printExtra)
+            {
+                return;
+            }
+
+            Console.WriteLine($"Runtime: {RuntimeInformation.FrameworkDescription} on {RuntimeInformation.OSDescription}");
+        }
     }
 }

README.md

@@ -87,7 +87,7 @@ Parameter               | Description
 `-max-servers <#>`		| maximum number of content servers to use. (default: 20).
 `-max-downloads <#>`	| maximum number of chunks to download concurrently. (default: 8).
 `-loginid <#>`			| a unique 32-bit integer Steam LogonID in decimal, required if running multiple instances of DepotDownloader concurrently.
-
+`-V` or `--version`     | print version and runtime
 
 ## Frequently Asked Questions