为基于GTK/CLUTTER的库增加GJS支持
参考GObject Introspection官方网址：
http://live.gnome.org/GObjectIntrospection
gtk gjs教程：
http://zetcode.com/gui/javascriptgtktutorial/
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? 在gnome shell中可以使用GJS来调用常用的GTK/CLUTTER/DBUS等库。这些库在编译的过程中通过生成.gir .typelib文件，使得gjs可以直接进行import。
这些文件的具体路径为：
/usr/share/gir-1.0/Gtk-3.0.gir
/usr/lib/girepository-1.0/Gtk-3.0.typelib
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直接在gjs文件中的使用方法testgtk.js：
imports.gi.versions.Gtk = '2.0';// GObject Introspection APIs are available from imports.gi.Modulenameconst Gtk = imports.gi.Gtk// JavaScript imports happen via imports.filename, where filename.js// is assumed to be available in module/ folderGtk.init (0, null);let win = new Gtk.Window({type: Gtk.WindowType.TOPLEVEL});win.set_border_width(10);win.connect('destroy', function (){Gtk.main_quit();});let button = new Gtk.Button({label: "Hello, world"});button.connect('clicked', function (){button.set_label("Bar");});win.add(button);button.show();win.show();Gtk.main();??运行：gjs testgtk.js
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gir的层次结构：
BUILD TIME: +-----------------------+ | foo.c | | foo.h | | | | Library sources, with type annotations | +-----------------------+ | | gcc g-ir-scanner | | | V | +------------------------+ | | Foo.gir | | | | | | <GI-name>.gir | | | | | | XML file | | | | | | Invocation information | | | Required .gir files | | | API docs | | | | | +------------------------+ | | | g-ir-compiler | | DEPLOYMENT TIME: | | | V V +-----------------------------+ +---------------------------+ | libfoo.so | | Foo.typelib | | | | | | | | Binary version of the | | ELF file | | invocation info and | | | | required .typelib files | | Machine code, plus | +---------------------------+ | dynamic linkage information | A | (DWARF debug data, etc) | | +-----------------------------+ | A | | +---------------------------+ | | libgirepository.so | +-----------+ | | | libffi.so | | Can read typelibs and | | |<-------+------>| present them in a | +-----------+ | | libffi-based way | | | | | +---------------------------+ | | +----------------------------+ | Specific language bindings | +----------------------------+