#!/usr/bin/python

from distutils.sysconfig import parse_makefile
import os
import shutil

from gi.repository import Gio
from gi.repository import GLib

shell_dir = os.path.abspath(os.path.dirname(__file__))
scripts_dir = os.path.dirname(shell_dir)
root_dir = os.path.dirname(scripts_dir)
source_dir = os.path.join(root_dir, "source")
build_dir = os.path.join(root_dir, "build")

monitors = []

def install(file):
    dir = os.path.dirname(file.get_path())
    relative_path = os.path.relpath(dir, source_dir)
    makefile_path = os.path.join(build_dir, relative_path, "Makefile")
    makefile = parse_makefile(makefile_path)

    for variable in makefile:
        if variable.endswith("_PYTHON"):
            dir_variable = "%sdir" % variable.replace("_PYTHON", "")
            install_dir = makefile[dir_variable]
            shutil.copy(file.get_path(), install_dir)

def changed_cb(monitor, file, other_file, event_flags):
    if event_flags == Gio.FileMonitorEvent.CHANGED:
        if file.get_path().endswith(".py"):
            install(file)

for root, dirs, files in os.walk(os.getcwd()):
    for dir in dirs:
        file = Gio.File.new_for_path(os.path.join(root, dir))
        monitor = file.monitor(Gio.FileMonitorFlags.NONE, None)
        monitor.connect("changed", changed_cb)

        monitors.append(monitor)

main_loop = GLib.MainLoop()
main_loop.run()