#!/usr/bin/python

"""Modify a dependency listed in a package.json file"""

# Copyright 2013 T.C. Hollingsworth <tchollingsworth@gmail.com>

#

# Permission is hereby granted, free of charge, to any person obtaining a copy

# of this software and associated documentation files (the "Software"), to

# deal in the Software without restriction, including without limitation the

# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or

# sell copies of the Software, and to permit persons to whom the Software is

# furnished to do so, subject to the following conditions:

#

# The above copyright notice and this permission notice shall be included in

# all copies or substantial portions of the Software.

#

# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING

# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS

# IN THE SOFTWARE.

import json

import os

import shutil

import sys

if not os.path.exists('package.json~'):

    shutil.copy2('package.json', 'package.json~')

md = json.load(open('package.json'))

if 'dependencies' not in md: 

    md['dependencies'] = {}

if sys.argv[1] == '-r':

    dep = sys.argv[2]

    del md['dependencies'][dep]

else:

    dep = sys.argv[1]

    if len(sys.argv) > 2:

        ver = sys.argv[2]

    else:

        ver = '*'

    md['dependencies'][dep] = ver

fh = open('package.json', 'w')

data = json.JSONEncoder(indent=4).encode(md)

fh.write(data)

fh.close()