Add iOS platform (refactor Mac into shared Apple platform impl)

Source/Tools/Flax.Build/Platforms/Apple/ApplePlatform.cs

@@ -0,0 +1,48 @@
+// Copyright (c) 2012-2023 Wojciech Figat. All rights reserved.
+
+using System;
+using System.IO;
+using Flax.Build.Projects;
+
+namespace Flax.Build.Platforms
+{
+    /// <summary>
+    /// The build platform for all Apple systems.
+    /// </summary>
+    /// <seealso cref="UnixPlatform" />
+    public abstract class ApplePlatform : UnixPlatform
+    {
+        /// <inheritdoc />
+        public override bool HasRequiredSDKsInstalled { get; }
+
+        /// <inheritdoc />
+        public override bool HasSharedLibrarySupport => true;
+
+        /// <inheritdoc />
+        public override string SharedLibraryFileExtension => ".dylib";
+
+        /// <inheritdoc />
+        public override string ProgramDatabaseFileExtension => ".dSYM";
+
+        /// <inheritdoc />
+        public override string SharedLibraryFilePrefix => string.Empty;
+
+        /// <inheritdoc />
+        public override ProjectFormat DefaultProjectFormat => ProjectFormat.XCode;
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Flax.Build.Platforms.ApplePlatform"/> class.
+        /// </summary>
+        public ApplePlatform()
+        {
+            if (Platform.BuildTargetPlatform != TargetPlatform.Mac)
+                return;
+            HasRequiredSDKsInstalled = XCode.Instance.IsValid;
+        }
+
+        public static void FixInstallNameId(string dylibPath)
+        {
+            Utilities.Run("install_name_tool", string.Format(" -id \"@rpath/{0}\" \"{1}\"", Path.GetFileName(dylibPath), dylibPath), null, null, Utilities.RunOptions.ThrowExceptionOnError);
+        }
+    }
+}