#!/usr/bin/python

import sys
import os
import shlex

try:
    import json
except ImportError:
    import simplejson as json

# ===========================================
# convert arguments of form a=b c=d
# to a dictionary
# FIXME: make more idiomatic

args = " ".join(sys.argv[1:])
items = shlex.split(args)
params = {}
for x in items:
    (k, v) = x.split("=")
    params[k] = v

src  = params['src']
dest = params['dest']

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

md5sum = None
changed = False
if os.path.exists(dest):
    md5sum = os.popen("md5sum %s" % dest).read().split()[0]

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

md5sum2 = os.popen("md5sum %s" % dest).read().split()[0]

if md5sum != md5sum2:
    changed = True

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