perf(extend): extends the functionalities

snigdhaos-kernel-manager.py

@@ -1,3 +1,115 @@
-#!/usr/bin/python
+#!/usr/bin/env python3
+
+import os
+import gi
+import signal
+import functions as fn
+
+from ui.ManagerGUI import ManagerGUI
+
+gi.require_version("Gtk", "4.0")
+
+from gi.repository import Gtk, Gio, GLib, Gdk
+
+base_dir = fn.os.path.dirname(fn.os.path.realpath(__file__))
 
 
+app_name = "Snigdha OS Kernel Manager"
+app_version = "${app_version}"
+app_name_dir = "snigdhaos-kernel-manager"
+app_id = "org.snigdhaos.kernelmanager"
+lock_file = "/tmp/sokm.lock"
+pid_file = "/tmp/sokm.pid"
+
+
+class Main(Gtk.Application):
+    def __init__(self):
+        super().__init__(application_id=app_id, flags=Gio.ApplicationFlags.FLAGS_NONE)
+
+    def do_activate(self):
+        default_context = GLib.MainContext.default()
+
+        win = self.props.active_window
+
+        if not win:
+            win = ManagerGUI(
+                application=self,
+                app_name=app_name,
+                default_context=default_context,
+                app_version=app_version,
+            )
+
+        display = Gtk.Widget.get_display(win)
+
+        # sourced from /usr/share/icons/hicolor/scalable/apps
+        win.set_icon_name("archlinux-kernel-manager-tux")
+        provider = Gtk.CssProvider.new()
+        css_file = Gio.file_new_for_path(base_dir + "/snigdhaos-kernel-manager.css")
+        provider.load_from_file(css_file)
+        Gtk.StyleContext.add_provider_for_display(
+            display, provider, Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION
+        )
+
+        win.present()
+
+    def do_startup(self):
+        Gtk.Application.do_startup(self)
+
+    def do_shutdown(self):
+        Gtk.Application.do_shutdown(self)
+        if os.path.exists(lock_file):
+            os.remove(lock_file)
+        if os.path.exists(pid_file):
+            os.remove(pid_file)
+
+
+def signal_handler(sig, frame):
+    Gtk.main_quit(0)
+
+
+# These should be kept as it ensures that multiple installation instances can't be run concurrently.
+if __name__ == "__main__":
+    try:
+        # signal.signal(signal.SIGINT, signal_handler)
+
+        if not fn.os.path.isfile(lock_file):
+            with open(pid_file, "w") as f:
+                f.write(str(fn.os.getpid()))
+
+            # splash = SplashScreen()
+
+            app = Main()
+            app.run(None)
+        else:
+            md = Gtk.MessageDialog(
+                parent=Main(),
+                flags=0,
+                message_type=Gtk.MessageType.INFO,
+                buttons=Gtk.ButtonsType.YES_NO,
+                text="%s Lock File Found" % app_name,
+            )
+            md.format_secondary_markup(
+                "A %s lock file has been found. This indicates there is already an instance of <b>%s</b> running.\n\
+                Click 'Yes' to remove the lock file and try running again"
+                % (lock_file, app_name)
+            )  # noqa
+
+            result = md.run()
+            md.destroy()
+
+            if result in (Gtk.ResponseType.OK, Gtk.ResponseType.YES):
+                pid = ""
+                if fn.os.path.exists(pid_file):
+                    with open(pid_file, "r") as f:
+                        line = f.read()
+                        pid = line.rstrip().lstrip()
+
+                else:
+                    # in the rare event that the lock file is present, but the pid isn't
+                    fn.os.unlink(lock_file)
+                    fn.sys.exit(1)
+            else:
+                fn.sys.exit(1)
+    except Exception as e:
+        # fn.logger.error("Exception in __main__: %s" % e)
+        print("Exception in __main__: %s" % e)