#!/usr/bin/python

import os, subprocess, shutil
import sys, errno

def getKey(item):
    return item[0]



if (len(sys.argv)<3):
    print "destination source1 [source2]\n"
    sys.exit(1)
dest = sys.argv[1];
if (not os.path.isdir(dest)):
    print "Destination dir must exist!\n"
    sys.exit(1)
filelist = []
for src in sys.argv[2:]:
    for (dirpath, dirnames, filenames) in os.walk(src):
        for d in dirnames:
            reldir = os.path.relpath(os.path.join(dirpath, d), src)
            try:
                os.makedirs(os.path.join(dest, reldir))
            except OSError as exc:  # Python >2.5
                if exc.errno == errno.EEXIST and os.path.isdir(os.path.join(dest, reldir)):
                    pass
                else:
                    raise
        for f in filenames:
            absfile = os.path.join(dirpath, f)
            relfile = os.path.relpath(absfile, src)
            try:
                startblock = int(subprocess.check_output(['getfattr', '-n', 'user.ltfs.startblock', '--only-values', '--absolute-names', absfile]))
            except:
                startblock = 0
            #print "" + relfile + "  === " + str(startblock)
            filelist.append((startblock, absfile, os.path.join(dest, relfile)))

filelist = sorted(filelist, key=getKey)
for f in filelist:
    print "" + str(f[0]) + " == " + f[1] + " to " + f[2]  + "\n"
    shutil.copyfile(f[1], f[2])