#!/usr/bin/python

import sys
import os

try:
    import json
except ImportError:
    import simplejson as json

source   = sys.argv[1]
dest     = sys.argv[2]
 
# raise an error if there is no source file
if not os.path.exists(source):
    print json.dumps({
        "failed" : 1,
        "msg"    : "Source %s failed to transfer" % source
    })
    sys.exit(1)

md5sum = None
changed = False
if os.path.exists(dest):
    md5sum = os.popen("md5sum %s" % dest).read()

os.system("cp %s %s" % (source, dest))

md5sum2 = os.popen("md5sum %s" % dest).read()

if md5sum != md5sum2:
    changed = True

# mission accomplished
print json.dumps({
   "md5sum"   : md5sum2,
   "changed"  : changed 
})