#!/usr/bin/python

# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
#

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

if len(sys.argv) == 1:
    sys.exit(1)
argfile = sys.argv[1]
if not os.path.exists(argfile):
    sys.exit(1)
items = shlex.split(open(argfile, 'r').read())


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 
})