autosync.py

import os
import sys
import time
import shutil

import win32con
import win32file
import winnt
try:
    path_to_watch = os.path.abspath (sys.argv[1])
    path_to_mirror = os.path.abspath (sys.argv[2])
except:
    print "Usage: %s path_to_watch path_where_to_mirror" % sys.argv[0]

print "Mirroring %s @%s to %s" % (path_to_watch, time.asctime(), path_to_mirror)

hDir = win32file.CreateFile(
    path_to_watch,
    win32con.GENERIC_READ,
    win32con.FILE_SHARE_READ|win32con.FILE_SHARE_WRITE,
    None,
    win32con.OPEN_EXISTING,
    win32con.FILE_FLAG_BACKUP_SEMANTICS,
    None
)
while 1:   
    events = win32file.ReadDirectoryChangesW(
        hDir,
        1024,
        True,
        win32con.FILE_NOTIFY_CHANGE_FILE_NAME |
        win32con.FILE_NOTIFY_CHANGE_DIR_NAME |
        win32con.FILE_NOTIFY_CHANGE_ATTRIBUTES |
        win32con.FILE_NOTIFY_CHANGE_SIZE |
        win32con.FILE_NOTIFY_CHANGE_LAST_WRITE |
        win32con.FILE_NOTIFY_CHANGE_SECURITY,
        None,
        None
    )
    oldname = None
    for id, path in events:
        cpath = os.path.join(path_to_watch, path)
        rpath = os.path.join(path_to_mirror, path)
        if id == winnt.FILE_ACTION_ADDED:
            print "Adding:", cpath
            if os.path.isfile(cpath):
                shutil.copyfile(cpath, rpath)
            if os.path.isdir(cpath):
                shutil.copytree(cpath, rpath)
        if id == winnt.FILE_ACTION_REMOVED:
            print "Removing:", cpath
            if os.path.isfile(rpath):
                os.unlink(rpath)
            if os.path.isdir(rpath):
                shutil.rmtree(rpath)
        if id == winnt.FILE_ACTION_MODIFIED:
            if os.path.isfile(cpath):
                print "Updating:", cpath
                shutil.copyfile(cpath, rpath)
            if os.path.isdir(cpath):
                pass
        if id == winnt.FILE_ACTION_RENAMED_OLD_NAME:
            oldname = rpath
        if id == winnt.FILE_ACTION_RENAMED_NEW_NAME:
            os.rename(oldname, rpath)