"""

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

refresh the blinkster-boot.py script

-prerequisite:

- virtualenv

- distribute

- psycopg2 requires the PostgreSQL libpq libraries and the pg_config utility

"""

import os

import subprocess

import re

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

base_dir = os.path.dirname(here)

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

import virtualenv

# things to install

EXTRA_TEXT = """

import shutil

import tarfile

import urllib

def extend_parser(parser):

def adjust_options(options, args):

    if not args:

        return # caller will raise error

    # We're actually going to build the venv in a subdirectory

    base_dir = args[0]

    if len(args) > 1:

        venv_name = args[1]

    else:

        venv_name = "blinkster"

    args[0] = join(base_dir, venv_name)

def after_install(options, home_dir):

    base_dir = os.path.dirname(home_dir)

    src_dir = join(home_dir, 'src')

    tmp_dir = join(home_dir, 'tmp')

    ensure_dir(src_dir)

    ensure_dir(tmp_dir)

    #logger.indent += 2

    try:

                        cwd=os.path.abspath(tmp_dir),

                        filter_stdout=filter_python_develop,

                        show_stdout=False)

                        cwd=os.path.abspath(tmp_dir),

                        filter_stdout=filter_python_develop,

                        show_stdout=False)

#delete src

        #call_subprocess([os.path.abspath(join(home_dir, 'bin', 'python')), 'setup.py', 'develop'],

        #                cwd=os.path.abspath(fassembler_dir),

        #                filter_stdout=filter_python_develop,

        #                show_stdout=False)

    finally:

    script_dir = join(base_dir, 'bin')

    logger.notify('Run "%s Package" to install new packages that provide builds'

                  % join(script_dir, 'easy_install'))

def ensure_dir(dir):

    if not os.path.exists(dir):

        logger.info('Creating directory %s' % dir)

        os.makedirs(dir)

def filter_python_develop(line):

    if not line.strip():

        return Logger.DEBUG

    for prefix in ['Searching for', 'Reading ', 'Best match: ', 'Processing ',

                   'Moving ', 'Adding ', 'running ', 'writing ', 'Creating ',

                   'creating ', 'Copying ']:

        if line.startswith(prefix):

            return Logger.DEBUG

    return Logger.NOTIFY

"""

def main():

    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()