Mono/C#: Add iOS support

Right now, games only work on devices when exported with FullAOT+Interpreter.
There are some issues left that need to addressed for FullAOT alone. Right now,
it's giving issues with the Godot.NativeCalls static constructor.

modules/mono/editor/GodotTools/GodotTools/Utils/OS.cs

@@ -5,6 +5,7 @@ using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
+using JetBrains.Annotations;
 
 namespace GodotTools.Utils
 {
@@ -26,6 +27,7 @@ namespace GodotTools.Utils
             public const string UWP = "UWP";
             public const string Haiku = "Haiku";
             public const string Android = "Android";
+            public const string iOS = "iOS";
             public const string HTML5 = "HTML5";
         }
 
@@ -38,6 +40,7 @@ namespace GodotTools.Utils
             public const string UWP = "uwp";
             public const string Haiku = "haiku";
             public const string Android = "android";
+            public const string iOS = "iphone";
             public const string HTML5 = "javascript";
         }
 
@@ -50,6 +53,7 @@ namespace GodotTools.Utils
             [Names.UWP] = Platforms.UWP,
             [Names.Haiku] = Platforms.Haiku,
             [Names.Android] = Platforms.Android,
+            [Names.iOS] = Platforms.iOS,
             [Names.HTML5] = Platforms.HTML5
         };
 
@@ -65,6 +69,7 @@ namespace GodotTools.Utils
         private static readonly Lazy<bool> _isUWP = new Lazy<bool>(() => IsOS(Names.UWP));
         private static readonly Lazy<bool> _isHaiku = new Lazy<bool>(() => IsOS(Names.Haiku));
         private static readonly Lazy<bool> _isAndroid = new Lazy<bool>(() => IsOS(Names.Android));
+        private static readonly Lazy<bool> _isiOS = new Lazy<bool>(() => IsOS(Names.iOS));
         private static readonly Lazy<bool> _isHTML5 = new Lazy<bool>(() => IsOS(Names.HTML5));
 
         public static bool IsWindows => _isWindows.Value || IsUWP;
@@ -74,10 +79,11 @@ namespace GodotTools.Utils
         public static bool IsUWP => _isUWP.Value;
         public static bool IsHaiku => _isHaiku.Value;
         public static bool IsAndroid => _isAndroid.Value;
+        public static bool IsiOS => _isiOS.Value;
         public static bool IsHTML5 => _isHTML5.Value;
 
         private static bool? _isUnixCache;
-        private static readonly string[] UnixLikePlatforms = { Names.OSX, Names.X11, Names.Server, Names.Haiku, Names.Android };
+        private static readonly string[] UnixLikePlatforms = { Names.OSX, Names.X11, Names.Server, Names.Haiku, Names.Android, Names.iOS };
 
         public static bool IsUnixLike()
         {
@@ -91,12 +97,12 @@ namespace GodotTools.Utils
 
         public static char PathSep => IsWindows ? ';' : ':';
 
-        public static string PathWhich(string name)
+        public static string PathWhich([NotNull] string name)
         {
             return IsWindows ? PathWhichWindows(name) : PathWhichUnix(name);
         }
 
-        private static string PathWhichWindows(string name)
+        private static string PathWhichWindows([NotNull] string name)
         {
             string[] windowsExts = Environment.GetEnvironmentVariable("PATHEXT")?.Split(PathSep) ?? new string[] { };
             string[] pathDirs = Environment.GetEnvironmentVariable("PATH")?.Split(PathSep);
@@ -121,7 +127,7 @@ namespace GodotTools.Utils
                     select path + ext).FirstOrDefault(File.Exists);
         }
 
-        private static string PathWhichUnix(string name)
+        private static string PathWhichUnix([NotNull] string name)
         {
             string[] pathDirs = Environment.GetEnvironmentVariable("PATH")?.Split(PathSep);
 
@@ -163,5 +169,33 @@ namespace GodotTools.Utils
                     User32Dll.AllowSetForegroundWindow(process.Id); // allows application to focus itself
             }
         }
+
+        public static int ExecuteCommand(string command, IEnumerable<string> arguments)
+        {
+            // TODO: Once we move to .NET Standard 2.1 we can use ProcessStartInfo.ArgumentList instead
+            string CmdLineArgsToString(IEnumerable<string> args)
+            {
+                // Not perfect, but as long as we are careful...
+                return string.Join(" ", args.Select(arg => arg.Contains(" ") ? $@"""{arg}""" : arg));
+            }
+
+            var startInfo = new ProcessStartInfo(command, CmdLineArgsToString(arguments));
+
+            Console.WriteLine($"Executing: \"{startInfo.FileName}\" {startInfo.Arguments}");
+
+            // Print the output
+            startInfo.RedirectStandardOutput = false;
+            startInfo.RedirectStandardError = false;
+
+            startInfo.UseShellExecute = false;
+
+            using (var process = new Process { StartInfo = startInfo })
+            {
+                process.Start();
+                process.WaitForExit();
+
+                return process.ExitCode;
+            }
+        }
     }
 }