#!/usr/bin/env python
"""
tar up a set of packages in a virtualenv per platform:

<package>-<version>-<platform>.tar.gz

Example:

mozmill-1.4.1-linux.tar.gz
"""

import os
import subprocess
import sys
import tempfile

from optparse import OptionParser, IndentedHelpFormatter, HelpFormatter
from utils import which

def call(*args, **kwargs):
    code = subprocess.call(*args, **kwargs)
    if code:
        sys.exit(code)

class UnformattedDescription(IndentedHelpFormatter):
    def format_description(self, description):
        return description.strip() or ''

def main(args=sys.argv[1:]):
    
    del os.environ['PYTHONHOME'] # just make sure this is killed

    # parse options
    usage = '%prog [options] <package> <platform>'
    parser = OptionParser(usage, description=globals()['__doc__'],
                          formatter=UnformattedDescription())
    parser.add_option('-b', '--name',
                      help='name of the bundle')
    parser.add_option('-d', '--directory',
                      help='directory to use as the virtualenv')
    parser.add_option('--version',
                      help='version of the package to be installed (defaults to the current on the cheeseshop)')
    parser.add_option('--virtualenv',
                      help='path to virtualenv to use')
    options, args = parser.parse_args(args)
    if not args:
        parser.print_help()
        sys.exit(0)
    if not options.name:
        options.name = '+'.join(args)

    # locate virtualenv
    if not options.virtualenv:
        options.virtualenv = which('virtualenv')
    if not os.path.exist(options.virtualenv):
        parser.error("'%s', specified by --virtualenv, does not exist")
    if options.virtualenv is None:
        # TODO: download virtualenv for them
        parser.error("virtualenv cannot be found; please install virtualenv or specify its location with --virtualenv")

    # create a virtualenv
    if not options.directory:
        options.directory = tempfile.mkdtemp(dir=os.getcwd())
    call([options.virtualenv, '--no-site-packages', options.directory])
    oldpwd = os.getcwd()
    os.chdir(options.directory)

    # install the packages
    bundlename = options.name + '.pybundle'
    command = [ 'bin/pip', 'bundle', bundlename ]
    command.extend(args)
    call(command)
    command = ['bin/pip', 'install', bundlename ]

    # get the versions
    

if __name__ == '__main__':
    main()