File nodejs-symlink-deps of Package nodejs

#!/usr/bin/python

"""Symlink a node module's dependencies into the node_modules directory so users
can `npm link` RPM-installed modules into their personal projects."""

# Copyright 2012 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 sys

#the %nodejs_symlink_deps macro passes %nodejs_sitelib as the first argument
sitelib = sys.argv[1]

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

if len(sys.argv) > 2:
    name = sys.argv[2]
else:
    name = metadata['name']

os.chdir(os.path.join(os.environ['RPM_BUILD_ROOT'], sitelib.lstrip('/'), name))

if 'dependencies' in metadata:
    try:
        os.mkdir('node_modules')
    except OSError:
        sys.stderr.write('WARNING: node_modules already exists. Make sure you have ' +
                            'no bundled dependencies.\n')

os.chdir('node_modules')

for dep in metadata['dependencies'].iterkeys():
        os.symlink(os.path.join(sitelib, dep), dep)