"""

Call this like ``python 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

- virtualenv --distribute --no-site-packages venv

- python blinkster-boot.py --distribute --no-site-packages --index-url=http://pypi.websushi.org/ --clear bvenv

"""

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, 'blinkster-boot.py')

import virtualenv

# things to install

# - psycopg2 -> pip

# - PIL -> pip

# - pyxml -> pip

# - 4Suite-xml - easy_install ftp://ftp.4suite.org/pub/4Suite/4Suite-XML-1.0.2.tar.bz2

# - pylucene  - script

src_base = os.path.join(here,"res","src")

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

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

EXTRA_TEXT  = "URLS = { \n"

EXTRA_TEXT += "}\n"

EXTRA_TEXT += "import sys\n"

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

EXTRA_TEXT += """

import shutil

import tarfile

import urllib

import platform

import patch

INDEX_URL = 'http://pypi.python.org/simple/'

def extend_parser(parser):

    parser.add_option(

        '--index-url',

        metavar='INDEX_URL',

        dest='index_url',

        default='',

        help='base URL of Python Package Index')

    parser.add_option(

def adjust_options(options, args):

    pass

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:

        #get pylucene

        pylucene_src = os.path.join(src_dir,"pylucene.tar.gz")

        urllib.urlretrieve(URLS['PYLUCENE'][res_source_key], pylucene_src)

        tf = tarfile.open(pylucene_src,'r:gz')

        pylucene_base_path = os.path.join(src_dir,"pylucene") 

        tf.extractall(pylucene_base_path)

        tf.close()

        pylucene_src_path = os.path.join(pylucene_base_path, os.listdir(pylucene_base_path)[0])

        #install jcc

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

                        filter_stdout=filter_python_develop,

                        show_stdout=True)

        #install pylucene       

        #modify makefile

        makefile_path = os.path.join(pylucene_src_path,"Makefile")

        shutil.move( makefile_path, makefile_path+"~" )

        destination= open( makefile_path, "w" )

        source= open( makefile_path+"~", "r" )

        destination.write("PREFIX_PYTHON="+os.path.abspath(home_dir)+"\\n")

        destination.write("ANT=ant\\n")

        destination.write("PYTHON=$(PREFIX_PYTHON)/bin/python\\n")

        if system_str == "Darwin":

            if sys.version_info >= (2,6):

                destination.write("JCC=$(PYTHON) -m jcc.__main__ --shared --arch x86_64 --arch i386\\n")

            else:

                destination.write("JCC=$(PYTHON) -m jcc --shared --arch x86_64 --arch i386\\n")

            destination.write("NUM_FILES=2\\n")

        elif system_str == "Windows":

            destination.write("JCC=$(PYTHON) -m jcc.__main__ --shared --arch x86_64 --arch i386\\n")

            destination.write("NUM_FILES=2\\n")

        else:

            destination.write("JCC=$(PYTHON) -m jcc --shared\\n")

            destination.write("NUM_FILES=2\\n")

        for line in source:

            destination.write( line )

        source.close()

        destination.close()

        os.remove(makefile_path+"~" )

        call_subprocess(['make'],

                        cwd=os.path.abspath(pylucene_src_path),

                        filter_stdout=filter_python_develop,

                        show_stdout=True)

        call_subprocess(['make', 'install'],

                        cwd=os.path.abspath(pylucene_src_path),

                        filter_stdout=filter_python_develop,

                        show_stdout=True)

        shutil.rmtree(src_dir)

    finally:

        logger.indent -= 2

    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():

    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()