[iOS] Extend iOS plugins to support Swift runtime

misc/dist/ios_xcode/godot_ios.xcodeproj/project.pbxproj

@@ -10,6 +10,7 @@
 		1F1575721F582BE20003B888 /* dylibs in Resources */ = {isa = PBXBuildFile; fileRef = 1F1575711F582BE20003B888 /* dylibs */; };
 		DEADBEEF2F582BE20003B888 /* $binary.xcframework in Frameworks */ = {isa = PBXBuildFile; fileRef = DEADBEEF1F582BE20003B888 /* $binary.xcframework */; };
 		$modules_buildfile
+		$swift_runtime_buildfile
 		1FF8DBB11FBA9DE1009DE660 /* dummy.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 1FF8DBB01FBA9DE1009DE660 /* dummy.cpp */; };
 		D07CD44E1C5D589C00B7FB28 /* Images.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = D07CD44D1C5D589C00B7FB28 /* Images.xcassets */; };
 		D0BCFE4618AEBDA2004A7AAE /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = D0BCFE4418AEBDA2004A7AAE /* InfoPlist.strings */; };
@@ -35,6 +36,7 @@
 		1F1575711F582BE20003B888 /* dylibs */ = {isa = PBXFileReference; lastKnownFileType = folder; name = dylibs; path = "$binary/dylibs"; sourceTree = "<group>"; };
 		DEADBEEF1F582BE20003B888 /* $binary.xcframework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.xcframework; name = godot; path = "$binary.xcframework"; sourceTree = "<group>"; };
 		$modules_fileref
+		$swift_runtime_fileref
 		1FF4C1881F584E6300A41E41 /* $binary.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = "$binary.entitlements"; sourceTree = "<group>"; };
 		1FF8DBB01FBA9DE1009DE660 /* dummy.cpp */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.cpp.cpp; path = dummy.cpp; sourceTree = "<group>"; };
 		D07CD44D1C5D589C00B7FB28 /* Images.xcassets */ = {isa = PBXFileReference; lastKnownFileType = folder.assetcatalog; path = Images.xcassets; sourceTree = "<group>"; };
@@ -100,6 +102,7 @@
 				D07CD44D1C5D589C00B7FB28 /* Images.xcassets */,
 				D0BCFE4218AEBDA2004A7AAE /* Supporting Files */,
 				1FF8DBB01FBA9DE1009DE660 /* dummy.cpp */,
+				$swift_runtime_binary_files
 			);
 			path = "$binary";
 			sourceTree = "<group>";
@@ -145,6 +148,7 @@
 				TargetAttributes = {
 					D0BCFE3318AEBDA2004A7AAE = {
 						DevelopmentTeam = $team_id;
+						$swift_runtime_migration
 						ProvisioningStyle = Automatic;
 						SystemCapabilities = {
 						};
@@ -190,6 +194,7 @@
 			buildActionMask = 2147483647;
 			files = (
 				1FF8DBB11FBA9DE1009DE660 /* dummy.cpp in Sources */,
+				$swift_runtime_build_phase
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 		};
@@ -321,6 +326,7 @@
 				TARGETED_DEVICE_FAMILY = "$targeted_device_family";
 				VALID_ARCHS = "armv7 armv7s arm64 i386 x86_64";
 				WRAPPER_EXTENSION = app;
+				$swift_runtime_build_settings
 			};
 			name = Debug;
 		};
@@ -352,6 +358,7 @@
 				TARGETED_DEVICE_FAMILY = "$targeted_device_family";
 				VALID_ARCHS = "armv7 armv7s arm64 i386 x86_64";
 				WRAPPER_EXTENSION = app;
+				$swift_runtime_build_settings
 			};
 			name = Release;
 		};

misc/dist/ios_xcode/godot_ios/dummy.h

@@ -0,0 +1,31 @@
+/*************************************************************************/
+/*  dummy.h                                                              */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+// #import <Foundation/Foundation.h>

misc/dist/ios_xcode/godot_ios/dummy.swift

@@ -0,0 +1,31 @@
+/*************************************************************************/
+/*  dummy.swift                                                          */
+/*************************************************************************/
+/*                       This file is part of:                           */
+/*                           GODOT ENGINE                                */
+/*                      https://godotengine.org                          */
+/*************************************************************************/
+/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
+/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
+/*                                                                       */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the       */
+/* "Software"), to deal in the Software without restriction, including   */
+/* without limitation the rights to use, copy, modify, merge, publish,   */
+/* distribute, sublicense, and/or sell copies of the Software, and to    */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions:                                             */
+/*                                                                       */
+/* The above copyright notice and this permission notice shall be        */
+/* included in all copies or substantial portions of the Software.       */
+/*                                                                       */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+/*************************************************************************/
+
+import Foundation

platform/iphone/export/export.cpp

@@ -79,6 +79,7 @@ class EditorExportPlatformIOS : public EditorExportPlatform {
 		String modules_buildphase;
 		String modules_buildgrp;
 		Vector<String> capabilities;
+		bool use_swift_runtime;
 	};
 	struct ExportArchitecture {
 		String name;
@@ -682,6 +683,35 @@ void EditorExportPlatformIOS::_fix_config_file(const Ref<EditorExportPreset> &p_
 				}
 			}
 			strnew += lines[i].replace("$pbx_locale_build_reference", locale_files);
+		} else if (lines[i].find("$swift_runtime_migration") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : "LastSwiftMigration = 1250;";
+			strnew += lines[i].replace("$swift_runtime_migration", value) + "\n";
+		} else if (lines[i].find("$swift_runtime_build_settings") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : R"(
+            CLANG_ENABLE_MODULES = YES;
+            SWIFT_OBJC_BRIDGING_HEADER = "$binary/dummy.h";
+            SWIFT_VERSION = 5.0;
+            )";
+			value = value.replace("$binary", p_config.binary_name);
+			strnew += lines[i].replace("$swift_runtime_build_settings", value) + "\n";
+		} else if (lines[i].find("$swift_runtime_fileref") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : R"(
+            90B4C2AA2680BC560039117A /* dummy.h */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.h; path = "dummy.h"; sourceTree = "<group>"; };
+            90B4C2B52680C7E90039117A /* dummy.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "dummy.swift"; sourceTree = "<group>"; };
+            )";
+			strnew += lines[i].replace("$swift_runtime_fileref", value) + "\n";
+		} else if (lines[i].find("$swift_runtime_binary_files") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : R"(
+            90B4C2AA2680BC560039117A /* dummy.h */,
+            90B4C2B52680C7E90039117A /* dummy.swift */,
+            )";
+			strnew += lines[i].replace("$swift_runtime_binary_files", value) + "\n";
+		} else if (lines[i].find("$swift_runtime_buildfile") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : "90B4C2B62680C7E90039117A /* dummy.swift in Sources */ = {isa = PBXBuildFile; fileRef = 90B4C2B52680C7E90039117A /* dummy.swift */; };";
+			strnew += lines[i].replace("$swift_runtime_buildfile", value) + "\n";
+		} else if (lines[i].find("$swift_runtime_build_phase") != -1) {
+			String value = !p_config.use_swift_runtime ? "" : "90B4C2B62680C7E90039117A /* dummy.swift */,";
+			strnew += lines[i].replace("$swift_runtime_build_phase", value) + "\n";
 		} else {
 			strnew += lines[i] + "\n";
 		}
@@ -1591,6 +1621,10 @@ Error EditorExportPlatformIOS::_export_ios_plugins(const Ref<EditorExportPreset>
 
 		plugin_initialization_cpp_code += "\t" + initialization_method;
 		plugin_deinitialization_cpp_code += "\t" + deinitialization_method;
+
+		if (plugin.use_swift_runtime) {
+			p_config_data.use_swift_runtime = true;
+		}
 	}
 
 	// Updating `Info.plist`
@@ -1775,7 +1809,8 @@ Error EditorExportPlatformIOS::export_project(const Ref<EditorExportPreset> &p_p
 		"",
 		"",
 		"",
-		Vector<String>()
+		Vector<String>(),
+		false
 	};
 
 	Vector<IOSExportAsset> assets;

platform/iphone/plugin/godot_plugin_config.h

@@ -39,6 +39,7 @@
  The `config` section and fields are required and defined as follow:
 - **name**: name of the plugin
 - **binary**: path to static `.a` library
+- **use_swift_runtime**: optional boolean field used to determine if Swift runtime is used
 
 The `dependencies` and fields are optional.
 - **linked**: dependencies that should only be linked.
@@ -57,6 +58,7 @@ struct PluginConfigIOS {
 	static const char *CONFIG_SECTION;
 	static const char *CONFIG_NAME_KEY;
 	static const char *CONFIG_BINARY_KEY;
+	static const char *CONFIG_USE_SWIFT_KEY;
 	static const char *CONFIG_INITIALIZE_KEY;
 	static const char *CONFIG_DEINITIALIZE_KEY;
 
@@ -93,6 +95,7 @@ struct PluginConfigIOS {
 	// Required config section
 	String name;
 	String binary;
+	bool use_swift_runtime;
 	String initialization_method;
 	String deinitialization_method;
 
@@ -118,6 +121,7 @@ const char *PluginConfigIOS::PLUGIN_CONFIG_EXT = ".gdip";
 const char *PluginConfigIOS::CONFIG_SECTION = "config";
 const char *PluginConfigIOS::CONFIG_NAME_KEY = "name";
 const char *PluginConfigIOS::CONFIG_BINARY_KEY = "binary";
+const char *PluginConfigIOS::CONFIG_USE_SWIFT_KEY = "use_swift_runtime";
 const char *PluginConfigIOS::CONFIG_INITIALIZE_KEY = "initialization";
 const char *PluginConfigIOS::CONFIG_DEINITIALIZE_KEY = "deinitialization";
 
@@ -281,6 +285,7 @@ static inline PluginConfigIOS load_plugin_config(Ref<ConfigFile> config_file, co
 	String config_base_dir = path.get_base_dir();
 
 	plugin_config.name = config_file->get_value(PluginConfigIOS::CONFIG_SECTION, PluginConfigIOS::CONFIG_NAME_KEY, String());
+	plugin_config.use_swift_runtime = config_file->get_value(PluginConfigIOS::CONFIG_SECTION, PluginConfigIOS::CONFIG_USE_SWIFT_KEY, false);
 	plugin_config.initialization_method = config_file->get_value(PluginConfigIOS::CONFIG_SECTION, PluginConfigIOS::CONFIG_INITIALIZE_KEY, String());
 	plugin_config.deinitialization_method = config_file->get_value(PluginConfigIOS::CONFIG_SECTION, PluginConfigIOS::CONFIG_DEINITIALIZE_KEY, String());