#!/usr/bin/python
"""
Automatic dependency generator for Node.js libraries.
Parsed from package.json. See `man npm-json` for details.
"""
# Copyright 2012, 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.
from __future__ import unicode_literals
import json
import os
import re
import subprocess
import sys
RE_VERSION = re.compile(r'\s*v?([<>=~^]{0,2})\s*([0-9][0-9\.\-]*)\s*')
def main():
#npm2rpm uses functions here to write BuildRequires so don't print anything
#until the very end
deps = []
#it's highly unlikely that we'll ever get more than one file but we handle
#this like all RPM automatic dependency generation scripts anyway
paths = [path.rstrip() for path in sys.stdin.readlines()]
for path in paths:
if not path.endswith('package.json'):
continue
# we only want the package.json in the toplevel module directory
pathparts = path.split(os.sep)
if not pathparts[-5:-2] == ['usr', 'lib', 'node_modules']:
continue
fh = open(path)
metadata = json.load(fh)
fh.close()
#write out the node.js interpreter dependency
req = 'alt-nodejs16-nodejs(engine)'
if 'engines' in metadata and isinstance(metadata['engines'], dict) \
and 'node' in metadata['engines']:
deps += process_dep(req, metadata['engines']['node'])
else:
deps.append(req)
if 'dependencies' in metadata:
if isinstance(metadata['dependencies'], dict):
for name, version in metadata['dependencies'].iteritems():
req = 'alt-nodejs16-npm(' + name + ')'
deps += process_dep(req, version)
elif isinstance(metadata['dependencies'], list):
for name in metadata['dependencies']:
req = 'alt-nodejs16-npm(' + name + ')'
deps.append(req)
elif isinstance(metadata['dependencies'], basestring):
req = 'alt-nodejs16-npm(' + metadata['dependencies'] + ')'
deps.append(req)
else:
raise TypeError('invalid package.json: dependencies not a valid type')
print '\n'.join(deps)
# invoke the regular RPM requires generator
p = subprocess.Popen(['/usr/lib/rpm/find-requires'], stdout=subprocess.PIPE, stdin=subprocess.PIPE)
print p.communicate(input='\n'.join(paths))[0]
def process_dep(req, version):
"""Converts an individual npm dependency into RPM dependencies"""
deps = []
#there's no way RPM can do anything like an OR dependency
if '||' in version:
sys.stderr.write("WARNING: The {0} dependency contains an ".format(req) +
"OR (||) dependency: '{0}.\nPlease manually include ".format(version) +
"a versioned dependency in your spec file if necessary")
deps.append(req)
elif ' - ' in version:
gt, lt = version.split(' - ')
deps.append(req + ' >= ' + gt)
deps.append(req + ' <= ' + lt)
else:
m = re.match(RE_VERSION, version)
if m:
deps += convert_dep(req, m.group(1), m.group(2))
#There could be up to two versions here (e.g.">1.0 <3.1")
if len(version) > m.end():
m = re.match(RE_VERSION, version[m.end():])
if m:
deps += convert_dep(req, m.group(1), m.group(2))
else:
deps.append(req)
return deps
def convert_dep(req, operator, version):
"""Converts one of the two possibly listed versions into an RPM dependency"""
deps = []
#any version will do
if not version or version == '*':
deps.append(req)
#any prefix but ~ makes things dead simple
elif operator in ['>', '<', '<=', '>=', '=']:
deps.append(' '.join([req, operator, version]))
#oh boy, here we go...
else:
#split the dotted portions into a list (handling trailing dots properly)
parts = [part if part else 'x' for part in version.split('.')]
parts = [int(part) if part != 'x' and not '-' in part
else part for part in parts]
# 1 or 1.x or 1.x.x or ~1 or ^1
if len(parts) == 1 or parts[1] == 'x':
if parts[0] != 0:
deps.append('{0} >= {1}'.format(req, parts[0]))
deps.append('{0} < {1}'.format(req, parts[0]+1))
# 1.2.3 or 1.2.3-4 or 1.2.x or ~1.2.3 or ^1.2.3 or 1.2
elif len(parts) == 3 or operator != '~':
# 1.2.x or 1.2
if len(parts) == 2 or parts[2] == 'x':
deps.append('{0} >= {1}.{2}'.format(req, parts[0], parts[1]))
deps.append('{0} < {1}.{2}'.format(req, parts[0], parts[1]+1))
# ~1.2.3 or ^0.1.2 (zero is special with the caret operator)
elif operator == '~' or (operator == '^' and parts[0] == 0 and parts[1] > 0):
deps.append('{0} >= {1}'.format(req, version))
deps.append('{0} < {1}.{2}'.format(req, parts[0], parts[1]+1))
#^1.2.3
elif operator == '^' and parts[0:1] != [0,0]:
deps.append('{0} >= {1}'.format(req, version))
deps.append('{0} < {1}'.format(req, parts[0]+1))
# 1.2.3 or 1.2.3-4 or ^0.0.3
else:
deps.append('{0} = {1}'.format(req, version))
# ~1.2
elif operator == '~':
deps.append('{0} >= {1}'.format(req, version))
deps.append('{0} < {1}'.format(req, parts[0]+1))
#^1.2
elif operator == '^':
deps.append('{0} >= {1}'.format(req, version))
deps.append('{0} < {1}'.format(req, parts[0]+1))
return deps
if __name__ == '__main__':
main()