(chocolateyGH-119) Report version

Respond to `choco -v` and `choco --version` by just printing the
version. Older versions of chocolatey will ignore `choco --version` and
report the default text which contains the version, so this is great
for determining what version choco is on across both clients.

src/chocolatey.console/Program.cs

@@ -18,6 +18,7 @@ namespace chocolatey.console
     using System;
     using System.Collections.Generic;
     using System.IO;
+    using System.Linq;
     using infrastructure.adapters;
     using infrastructure.app;
     using infrastructure.app.builders;
@@ -58,7 +59,7 @@ private static void Main(string[] args)
 
                 var warnings = new List<string>();
 
-                ConfigurationBuilder.set_up_configuration(
+               ConfigurationBuilder.set_up_configuration(
                     args,
                     config,
                     fileSystem,
@@ -67,6 +68,8 @@ private static void Main(string[] args)
                     );
                 Config.initialize_with(config);
 
+                report_version_and_exit_if_requested(args, config);
+
                 trap_exit_scenarios(config);
 
                 if (config.RegularOuptut)
@@ -156,6 +159,19 @@ private static void Main(string[] args)
             }
         }
 
+        private static void report_version_and_exit_if_requested(string[] args, ChocolateyConfiguration config)
+        {
+            if (args == null || args.Length == 0) return;
+
+            var firstArg = args.FirstOrDefault();
+            if (firstArg.is_equal_to("-v") || firstArg.is_equal_to("--version"))
+            {
+                "chocolatey".Log().Info(ChocolateyLoggers.Important, () => "{0}".format_with(config.Information.ChocolateyProductVersion));
+                pause_execution_if_debug();
+                Environment.Exit(0);
+            }
+        }
+
         static EventHandler _handler;
 
         private static void trap_exit_scenarios(ChocolateyConfiguration config)

src/chocolatey/infrastructure.app/configuration/ConfigurationOptions.cs

@@ -95,6 +95,10 @@ public static void parse_arguments_and_update_configuration(ICollection<string>
                 {
                     configuration.CommandName = commandName;
                 }
+                else if (commandName.is_equal_to("-v") || commandName.is_equal_to("--version"))
+                {
+                    // skip help menu
+                }
                 else
                 {
                     configuration.HelpRequested = true;