godot/platform/osx/export/export.cpp

/*************************************************************************/
/*  export.cpp                                                           */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2017 Godot Engine contributors (cf. AUTHORS.md)    */
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/* permit persons to whom the Software is furnished to do so, subject to */
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#include "export.h"
#include "editor/editor_export.h"
#include "editor/editor_node.h"
#include "editor/editor_settings.h"
#include "io/marshalls.h"
#include "io/resource_saver.h"
#include "io/zip_io.h"
#include "os/file_access.h"
#include "os/os.h"
#include "platform/osx/logo.gen.h"
#include "project_settings.h"
#include "string.h"
#include "version.h"
#include <sys/stat.h>

class EditorExportPlatformOSX : public EditorExportPlatform {

	GDCLASS(EditorExportPlatformOSX, EditorExportPlatform);

	int version_code;

	Ref<ImageTexture> logo;

	void _fix_plist(const Ref<EditorExportPreset> &p_preset, Vector<uint8_t> &plist, const String &p_binary);
	void _make_icon(const Ref<Image> &p_icon, Vector<uint8_t> &p_data);
#ifdef OSX_ENABLED
	Error _code_sign(const Ref<EditorExportPreset> &p_preset, const String &p_path);
	Error _create_dmg(const String &p_dmg_path, const String &p_pkg_name, const String &p_app_path_name);
#endif

protected:
	virtual void get_preset_features(const Ref<EditorExportPreset> &p_preset, List<String> *r_features);
	virtual void get_export_options(List<ExportOption> *r_options);

public:
	virtual String get_name() const { return "Mac OSX"; }
	virtual String get_os_name() const { return "OSX"; }
	virtual Ref<Texture> get_logo() const { return logo; }

#ifdef OSX_ENABLED
	virtual String get_binary_extension() const { return "dmg"; }
#else
	virtual String get_binary_extension() const { return "zip"; }
#endif
	virtual Error export_project(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &p_path, int p_flags = 0);

	virtual bool can_export(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const;

	virtual void get_platform_features(List<String> *r_features) {

		r_features->push_back("pc");
		r_features->push_back("s3tc");
		r_features->push_back("OSX");
	}

	EditorExportPlatformOSX();
	~EditorExportPlatformOSX();
};

void EditorExportPlatformOSX::get_preset_features(const Ref<EditorExportPreset> &p_preset, List<String> *r_features) {

	// what does this need to do?
}

void EditorExportPlatformOSX::get_export_options(List<ExportOption> *r_options) {

	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_package/debug", PROPERTY_HINT_GLOBAL_FILE, "zip"), ""));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "custom_package/release", PROPERTY_HINT_GLOBAL_FILE, "zip"), ""));

	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/name"), ""));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/info"), "Made with Godot Engine"));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/icon", PROPERTY_HINT_FILE, "png"), ""));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/identifier"), "org.godotengine.macgame"));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/signature"), "godotmacgame"));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/short_version"), "1.0"));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/version"), "1.0"));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "application/copyright"), ""));
	r_options->push_back(ExportOption(PropertyInfo(Variant::INT, "application/bits_mode", PROPERTY_HINT_ENUM, "Fat (32 & 64 bits),64 bits,32 bits"), 0));
	r_options->push_back(ExportOption(PropertyInfo(Variant::BOOL, "display/high_res"), false));

#ifdef OSX_ENABLED
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "codesign/identity"), ""));
	r_options->push_back(ExportOption(PropertyInfo(Variant::STRING, "codesign/entitlements"), ""));
#endif
}

void EditorExportPlatformOSX::_make_icon(const Ref<Image> &p_icon, Vector<uint8_t> &p_data) {

	Ref<ImageTexture> it = memnew(ImageTexture);
	int size = 512;

	Vector<uint8_t> data;

	data.resize(8);
	data[0] = 'i';
	data[1] = 'c';
	data[2] = 'n';
	data[3] = 's';

	const char *name[] = { "ic09", "ic08", "ic07", "icp6", "icp5", "icp4" };
	int index = 0;

	while (size >= 16) {

		Ref<Image> copy = p_icon; // does this make sense? doesn't this just increase the reference count instead of making a copy? Do we even need a copy?
		copy->convert(Image::FORMAT_RGBA8);
		copy->resize(size, size);
		it->create_from_image(copy);
		String path = EditorSettings::get_singleton()->get_settings_path() + "/tmp/icon.png";
		ResourceSaver::save(path, it);

		FileAccess *f = FileAccess::open(path, FileAccess::READ);
		ERR_FAIL_COND(!f);

		int ofs = data.size();
		uint32_t len = f->get_len();
		data.resize(data.size() + len + 8);
		f->get_buffer(&data[ofs + 8], len);
		memdelete(f);
		len += 8;
		len = BSWAP32(len);
		copymem(&data[ofs], name[index], 4);
		encode_uint32(len, &data[ofs + 4]);
		index++;
		size /= 2;
	}

	uint32_t total_len = data.size();
	total_len = BSWAP32(total_len);
	encode_uint32(total_len, &data[4]);

	p_data = data;
}

void EditorExportPlatformOSX::_fix_plist(const Ref<EditorExportPreset> &p_preset, Vector<uint8_t> &plist, const String &p_binary) {

	String str;
	String strnew;
	str.parse_utf8((const char *)plist.ptr(), plist.size());
	Vector<String> lines = str.split("\n");
	for (int i = 0; i < lines.size(); i++) {
		if (lines[i].find("$binary") != -1) {
			strnew += lines[i].replace("$binary", p_binary) + "\n";
		} else if (lines[i].find("$name") != -1) {
			strnew += lines[i].replace("$name", p_binary) + "\n";
		} else if (lines[i].find("$info") != -1) {
			strnew += lines[i].replace("$info", p_preset->get("application/info")) + "\n";
		} else if (lines[i].find("$identifier") != -1) {
			strnew += lines[i].replace("$identifier", p_preset->get("application/identifier")) + "\n";
		} else if (lines[i].find("$short_version") != -1) {
			strnew += lines[i].replace("$short_version", p_preset->get("application/short_version")) + "\n";
		} else if (lines[i].find("$version") != -1) {
			strnew += lines[i].replace("$version", p_preset->get("application/version")) + "\n";
		} else if (lines[i].find("$signature") != -1) {
			strnew += lines[i].replace("$signature", p_preset->get("application/signature")) + "\n";
		} else if (lines[i].find("$copyright") != -1) {
			strnew += lines[i].replace("$copyright", p_preset->get("application/copyright")) + "\n";
		} else if (lines[i].find("$highres") != -1) {
			strnew += lines[i].replace("$highres", p_preset->get("display/high_res") ? "<true/>" : "<false/>") + "\n";
		} else {
			strnew += lines[i] + "\n";
		}
	}

	CharString cs = strnew.utf8();
	plist.resize(cs.size() - 1);
	for (int i = 0; i < cs.size() - 1; i++) {
		plist[i] = cs[i];
	}
}

#ifdef OSX_ENABLED
/**
	If we're running the OSX version of the Godot editor we'll:
	- export our application bundle to a temporary folder
	- attempt to code sign it
	- and then wrap it up in a DMG
**/

Error EditorExportPlatformOSX::_code_sign(const Ref<EditorExportPreset> &p_preset, const String &p_path) {
	List<String> args;
	if (p_preset->get("codesign/entitlements") != "") {
		/* this should point to our entitlements.plist file that sandboxes our application, I don't know if this should also be placed in our app bundle */
		args.push_back("-entitlements");
		args.push_back(p_preset->get("codesign/entitlements"));
	}
	args.push_back("-s");
	args.push_back(p_preset->get("codesign/identity"));
	args.push_back("-v"); /* provide some more feedback */
	args.push_back(p_path);
	Error err = OS::get_singleton()->execute("/usr/bin/codesign", args, true);
	ERR_FAIL_COND_V(err, err);

	return OK;
}

Error EditorExportPlatformOSX::_create_dmg(const String &p_dmg_path, const String &p_pkg_name, const String &p_app_path_name) {
	List<String> args;
	args.push_back("create");
	args.push_back(p_dmg_path);
	args.push_back("-volname");
	args.push_back(p_pkg_name);
	args.push_back("-fs");
	args.push_back("HFS+");
	args.push_back("-srcfolder");
	args.push_back(p_app_path_name);
	Error err = OS::get_singleton()->execute("/usr/bin/hdiutil", args, true);
	ERR_FAIL_COND_V(err, err);

	return OK;
}

Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &p_path, int p_flags) {

	String src_pkg_name;

	EditorProgress ep("export", "Exporting for OSX", 3);

	if (p_debug)
		src_pkg_name = p_preset->get("custom_package/debug");
	else
		src_pkg_name = p_preset->get("custom_package/release");

	if (src_pkg_name == "") {
		String err;
		src_pkg_name = find_export_template("osx.zip", &err);
		if (src_pkg_name == "") {
			EditorNode::add_io_error(err);
			return ERR_FILE_NOT_FOUND;
		}
	}

	FileAccess *src_f = NULL;
	zlib_filefunc_def io = zipio_create_io_from_file(&src_f);

	ep.step("Creating app", 0);

	unzFile src_pkg_zip = unzOpen2(src_pkg_name.utf8().get_data(), &io);
	if (!src_pkg_zip) {

		EditorNode::add_io_error("Could not find template app to export:\n" + src_pkg_name);
		return ERR_FILE_NOT_FOUND;
	}

	ERR_FAIL_COND_V(!src_pkg_zip, ERR_CANT_OPEN);
	int ret = unzGoToFirstFile(src_pkg_zip);

	String binary_to_use = "godot_osx_" + String(p_debug ? "debug" : "release") + ".";
	int bits_mode = p_preset->get("application/bits_mode");
	binary_to_use += String(bits_mode == 0 ? "fat" : bits_mode == 1 ? "64" : "32");

	print_line("binary: " + binary_to_use);
	String pkg_name;
	if (p_preset->get("application/name") != "")
		pkg_name = p_preset->get("application/name"); // app_name
	else if (String(ProjectSettings::get_singleton()->get("application/config/name")) != "")
		pkg_name = String(ProjectSettings::get_singleton()->get("application/config/name"));
	else
		pkg_name = "Unnamed";

	// We're on OSX so we can export to DMG, but first we create our application bundle
	String tmp_app_path_name = p_path.get_base_dir() + "/" + pkg_name + ".app";
	print_line("Exporting to " + tmp_app_path_name);
	DirAccess *tmp_app_path = DirAccess::create_for_path(tmp_app_path_name);
	ERR_FAIL_COND_V(!tmp_app_path, ERR_CANT_CREATE)

	///@TODO We should delete the existing application bundle especially if we attempt to code sign it, but what is a safe way to do this? Maybe call system function so it moves to trash?
	// tmp_app_path->erase_contents_recursive();

	// Create our folder structure or rely on unzip?
	print_line("Creating " + tmp_app_path_name + "/Contents/MacOS");
	Error dir_err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/MacOS");
	ERR_FAIL_COND_V(dir_err, ERR_CANT_CREATE)
	print_line("Creating " + tmp_app_path_name + "/Contents/Resources");
	dir_err = tmp_app_path->make_dir_recursive(tmp_app_path_name + "/Contents/Resources");
	ERR_FAIL_COND_V(dir_err, ERR_CANT_CREATE)

	/* Now process our template */
	bool found_binary = false;
	int total_size = 0;

	while (ret == UNZ_OK) {
		bool is_execute = false;

		//get filename
		unz_file_info info;
		char fname[16384];
		ret = unzGetCurrentFileInfo(src_pkg_zip, &info, fname, 16384, NULL, 0, NULL, 0);

		String file = fname;

		print_line("READ: " + file);
		Vector<uint8_t> data;
		data.resize(info.uncompressed_size);

		//read
		unzOpenCurrentFile(src_pkg_zip);
		unzReadCurrentFile(src_pkg_zip, data.ptr(), data.size());
		unzCloseCurrentFile(src_pkg_zip);

		//write

		file = file.replace_first("osx_template.app/", "");

		if (file == "Contents/Info.plist") {
			print_line("parse plist");
			_fix_plist(p_preset, data, pkg_name);
		}

		if (file.begins_with("Contents/MacOS/godot_")) {
			if (file != "Contents/MacOS/" + binary_to_use) {
				ret = unzGoToNextFile(src_pkg_zip);
				continue; //ignore!
			}
			found_binary = true;
			is_execute = true;
			file = "Contents/MacOS/" + pkg_name;
		}

		if (file == "Contents/Resources/icon.icns") {
			//see if there is an icon
			String iconpath;
			if (p_preset->get("application/icon") != "")
				iconpath = p_preset->get("application/icon");
			else
				iconpath = ProjectSettings::get_singleton()->get("application/config/icon");
			print_line("icon? " + iconpath);
			if (iconpath != "") {
				Ref<Image> icon;
				icon.instance();
				icon->load(iconpath);
				if (!icon->empty()) {
					print_line("loaded?");
					_make_icon(icon, data);
				}
			}
			//bleh?
		}

		if (data.size() > 0) {
			print_line("ADDING: " + file + " size: " + itos(data.size()));
			total_size += data.size();

			/* write it into our application bundle */
			file = tmp_app_path_name + "/" + file;

			/* write the file, need to add chmod */
			FileAccess *f = FileAccess::open(file, FileAccess::WRITE);
			ERR_FAIL_COND_V(!f, ERR_CANT_CREATE)
			f->store_buffer(data.ptr(), data.size());
			f->close();
			memdelete(f);

			if (is_execute) {
				// we need execute rights on this file
				chmod(file.utf8().get_data(), 0755);
			} else {
				// seems to already be set correctly
				// chmod(file.utf8().get_data(), 0644);
			}
		}

		ret = unzGoToNextFile(src_pkg_zip);
	}

	/* we're done with our source zip */
	unzClose(src_pkg_zip);

	if (!found_binary) {
		ERR_PRINTS("Requested template binary '" + binary_to_use + "' not found. It might be missing from your template archive.");
		unzClose(src_pkg_zip);
		return ERR_FILE_NOT_FOUND;
	}

	ep.step("Making PKG", 1);

	String pack_path = tmp_app_path_name + "/Contents/Resources/" + pkg_name + ".pck";
	Error err = save_pack(p_preset, pack_path);
	//	chmod(pack_path.utf8().get_data(), 0644);

	if (err) {
		return err;
	}

	/* see if we can code sign our new package */
	if (p_preset->get("codesign/identity") != "") {
		ep.step("Code signing bundle", 2);

		/* the order in which we code sign is important, this is a bit of a shame or we could do this in our loop that extracts the files from our ZIP */

		// start with our application
		err = _code_sign(p_preset, tmp_app_path_name + "/Contents/MacOS/" + pkg_name);
		ERR_FAIL_COND_V(err, err);

		///@TODO we should check the contents of /Contents/Frameworks for frameworks to sign

		// we should probably loop through all resources and sign them?
		err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Resources/icon.icns");
		ERR_FAIL_COND_V(err, err);
		err = _code_sign(p_preset, pack_path);
		ERR_FAIL_COND_V(err, err);
		err = _code_sign(p_preset, tmp_app_path_name + "/Contents/Info.plist");
		ERR_FAIL_COND_V(err, err);
	}

	/* and finally create a DMG */
	ep.step("Making DMG", 3);
	err = _create_dmg(p_path, pkg_name, tmp_app_path_name);
	ERR_FAIL_COND_V(err, err);

	return OK;
}

#else

/**
	When exporting for OSX from any other platform we don't have access to code signing or creating DMGs so we'll wrap the bundle into a zip file.

	Should probably find a nicer way to have just one export method instead of duplicating the method like this but I would the code got very
	messy with switches inside of it.
**/
Error EditorExportPlatformOSX::export_project(const Ref<EditorExportPreset> &p_preset, bool p_debug, const String &p_path, int p_flags) {

	String src_pkg_name;

	EditorProgress ep("export", "Exporting for OSX", 104);

	if (p_debug)
		src_pkg_name = p_preset->get("custom_package/debug");
	else
		src_pkg_name = p_preset->get("custom_package/release");

	if (src_pkg_name == "") {
		String err;
		src_pkg_name = find_export_template("osx.zip", &err);
		if (src_pkg_name == "") {
			EditorNode::add_io_error(err);
			return ERR_FILE_NOT_FOUND;
		}
	}

	FileAccess *src_f = NULL;
	zlib_filefunc_def io = zipio_create_io_from_file(&src_f);

	ep.step("Creating app", 0);

	unzFile src_pkg_zip = unzOpen2(src_pkg_name.utf8().get_data(), &io);
	if (!src_pkg_zip) {

		EditorNode::add_io_error("Could not find template app to export:\n" + src_pkg_name);
		return ERR_FILE_NOT_FOUND;
	}

	ERR_FAIL_COND_V(!src_pkg_zip, ERR_CANT_OPEN);
	int ret = unzGoToFirstFile(src_pkg_zip);

	String binary_to_use = "godot_osx_" + String(p_debug ? "debug" : "release") + ".";
	int bits_mode = p_preset->get("application/bits_mode");
	binary_to_use += String(bits_mode == 0 ? "fat" : bits_mode == 1 ? "64" : "32");

	print_line("binary: " + binary_to_use);
	String pkg_name;
	if (p_preset->get("application/name") != "")
		pkg_name = p_preset->get("application/name"); // app_name
	else if (String(ProjectSettings::get_singleton()->get("application/config/name")) != "")
		pkg_name = String(ProjectSettings::get_singleton()->get("application/config/name"));
	else
		pkg_name = "Unnamed";

	/* Open our destination zip file */
	zlib_filefunc_def io2 = io;
	FileAccess *dst_f = NULL;
	io2.opaque = &dst_f;
	zipFile dst_pkg_zip = zipOpen2(p_path.utf8().get_data(), APPEND_STATUS_CREATE, NULL, &io2);

	bool found_binary = false;

	while (ret == UNZ_OK) {

		//get filename
		unz_file_info info;
		char fname[16384];
		ret = unzGetCurrentFileInfo(src_pkg_zip, &info, fname, 16384, NULL, 0, NULL, 0);

		String file = fname;

		print_line("READ: " + file);
		Vector<uint8_t> data;
		data.resize(info.uncompressed_size);

		//read
		unzOpenCurrentFile(src_pkg_zip);
		unzReadCurrentFile(src_pkg_zip, data.ptr(), data.size());
		unzCloseCurrentFile(src_pkg_zip);

		//write

		file = file.replace_first("osx_template.app/", "");

		if (file == "Contents/Info.plist") {
			print_line("parse plist");
			_fix_plist(p_preset, data, pkg_name);
		}

		if (file.begins_with("Contents/MacOS/godot_")) {
			if (file != "Contents/MacOS/" + binary_to_use) {
				ret = unzGoToNextFile(src_pkg_zip);
				continue; //ignore!
			}
			found_binary = true;
			file = "Contents/MacOS/" + pkg_name;
		}

		if (file == "Contents/Resources/icon.icns") {
			//see if there is an icon
			String iconpath;
			if (p_preset->get("application/icon") != "")
				iconpath = p_preset->get("application/icon");
			else
				iconpath = ProjectSettings::get_singleton()->get("application/config/icon");
			print_line("icon? " + iconpath);
			if (iconpath != "") {
				Ref<Image> icon;
				icon.instance();
				icon->load(iconpath);
				if (!icon->empty()) {
					print_line("loaded?");
					_make_icon(icon, data);
				}
			}
			//bleh?
		}

		if (data.size() > 0) {
			print_line("ADDING: " + file + " size: " + itos(data.size()));

			/* add it to our zip file */
			file = pkg_name + ".app/" + file;

			zip_fileinfo fi;
			fi.tmz_date.tm_hour = info.tmu_date.tm_hour;
			fi.tmz_date.tm_min = info.tmu_date.tm_min;
			fi.tmz_date.tm_sec = info.tmu_date.tm_sec;
			fi.tmz_date.tm_mon = info.tmu_date.tm_mon;
			fi.tmz_date.tm_mday = info.tmu_date.tm_mday;
			fi.tmz_date.tm_year = info.tmu_date.tm_year;
			fi.dosDate = info.dosDate;
			fi.internal_fa = info.internal_fa;
			fi.external_fa = info.external_fa;

			int err = zipOpenNewFileInZip(dst_pkg_zip,
					file.utf8().get_data(),
					&fi,
					NULL,
					0,
					NULL,
					0,
					NULL,
					Z_DEFLATED,
					Z_DEFAULT_COMPRESSION);

			print_line("OPEN ERR: " + itos(err));
			err = zipWriteInFileInZip(dst_pkg_zip, data.ptr(), data.size());
			print_line("WRITE ERR: " + itos(err));
			zipCloseFileInZip(dst_pkg_zip);
		}

		ret = unzGoToNextFile(src_pkg_zip);
	}

	if (!found_binary) {
		ERR_PRINTS("Requested template binary '" + binary_to_use + "' not found. It might be missing from your template archive.");
		zipClose(dst_pkg_zip, NULL);
		unzClose(src_pkg_zip);
		return ERR_FILE_NOT_FOUND;
	}

	ep.step("Making PKG", 1);

	String pack_path = EditorSettings::get_singleton()->get_settings_path() + "/tmp/" + pkg_name + ".pck";
	Error err = save_pack(p_preset, pack_path);

	if (err) {
		zipClose(dst_pkg_zip, NULL);
		unzClose(src_pkg_zip);
		return err;
	}

	{
		//write datapack

		zipOpenNewFileInZip(dst_pkg_zip,
				(pkg_name + ".app/Contents/Resources/" + pkg_name + ".pck").utf8().get_data(),
				NULL,
				NULL,
				0,
				NULL,
				0,
				NULL,
				Z_DEFLATED,
				Z_DEFAULT_COMPRESSION);

		FileAccess *pf = FileAccess::open(pack_path, FileAccess::READ);
		ERR_FAIL_COND_V(!pf, ERR_CANT_OPEN);
		const int BSIZE = 16384;
		uint8_t buf[BSIZE];

		while (true) {

			int r = pf->get_buffer(buf, BSIZE);
			if (r <= 0)
				break;
			zipWriteInFileInZip(dst_pkg_zip, buf, r);
		}
		zipCloseFileInZip(dst_pkg_zip);
		memdelete(pf);
	}

	zipClose(dst_pkg_zip, NULL);
	unzClose(src_pkg_zip);

	return OK;
}
#endif

bool EditorExportPlatformOSX::can_export(const Ref<EditorExportPreset> &p_preset, String &r_error, bool &r_missing_templates) const {

	bool valid = true;
	String err;

	if (!exists_export_template("osx.zip", &err)) {
		valid = false;
	}

	if (p_preset->get("custom_package/debug") != "" && !FileAccess::exists(p_preset->get("custom_package/debug"))) {
		valid = false;
		err += "Custom debug package not found.\n";
	}

	if (p_preset->get("custom_package/release") != "" && !FileAccess::exists(p_preset->get("custom_package/release"))) {
		valid = false;
		err += "Custom release package not found.\n";
	}

	if (!err.empty())
		r_error = err;

	return valid;
}

EditorExportPlatformOSX::EditorExportPlatformOSX() {

	Ref<Image> img = memnew(Image(_osx_logo));
	logo.instance();
	logo->create_from_image(img);
}

EditorExportPlatformOSX::~EditorExportPlatformOSX() {
}

void register_osx_exporter() {

	Ref<EditorExportPlatformOSX> platform;
	platform.instance();

	EditorExport::get_singleton()->add_export_platform(platform);
}