"""

Call this like ``python create_python_env.py``; it will

refresh the project-boot.py script

-prerequisite:

- virtualenv

- distribute

- psycopg2 requires the PostgreSQL libpq libraries and the pg_config utility

- python project-boot.py --distribute --no-site-packages --index-url=http://pypi.websushi.org/ --clear --type-install=local --ignore-packages=MYSQL <path_to_venv>

- python project-boot.py --no-site-packages --clear --ignore-packages=MYSQL  --type-install=local <path_to_venv>

- For Linux :

python project-boot.py --unzip-setuptools --no-site-packages --index-url=http://pypi.websushi.org/ --clear --type-install=local <path_to_venv>

"""

import os

import subprocess

import re

import sys

here = os.path.dirname(os.path.abspath(__file__))

base_dir = here

script_name = os.path.join(base_dir, 'project-boot.py')

import virtualenv

src_base = os.path.abspath(os.path.join(here,"..","res","src")).replace("\\","/")

lib_path = os.path.abspath(os.path.join(here,"..","res","lib")).replace("\\","/")

patch_path = os.path.abspath(os.path.join(here,"res","patch")).replace("\\","/")

EXTRA_TEXT  = "import sys\n"

EXTRA_TEXT += "sys.path.append('%s')\n" % (lib_path)

EXTRA_TEXT += "sys.path.append('%s')\n" % (os.path.abspath(os.path.join(here,"res")).replace("\\","/"))

EXTRA_TEXT += "from res_create_env import generate_install_methods\n"

EXTRA_TEXT += "adjust_options, extend_parser, after_install = generate_install_methods(path_locations, '%s', Logger, call_subprocess)\n" % (src_base)

def main():

    python_version = ".".join(map(str,sys.version_info[0:2]))

    text = virtualenv.create_bootstrap_script(EXTRA_TEXT, python_version=python_version)

    if os.path.exists(script_name):

        f = open(script_name)

        cur_text = f.read()

        f.close()

    else:

        cur_text = ''

    print 'Updating %s' % script_name

    if cur_text == 'text':

        print 'No update'

    else:

        print 'Script changed; updating...'

        f = open(script_name, 'w')

        f.write(text)

        f.close()

if __name__ == '__main__':

    main()