# -*- coding: utf-8 -*-
"""pysh --- shell-like extensions for IPython."""

#*****************************************************************************
#       Copyright (C) 2004 Fernando Perez. <fperez@colorado.edu>
#
#  Distributed under the terms of the BSD License.  The full license is in
#  the file COPYING, distributed as part of this software.
#*****************************************************************************

from IPython import Release
__author__  = '%s <%s>' % Release.authors['Fernando']
__license__ = Release.license

# This module contains the bulk of the core changes.  By importing it we
# benefit from python's bytecode compilation
from IPython.Extensions.InterpreterExec import *

# Configure a few things.  Much of this is fairly hackish, since IPython
# doesn't really expose a clean API for it.  Be careful if you start making
# many modifications here.

print """\
Welcome to pysh, a set of extensions to IPython for shell usage.
help(pysh) -> help on the installed shell extensions and syntax.
"""

#  Set the 'cd' command to quiet mode, a more shell-like behavior
__IPYTHON__.default_option('cd','-q')

# Load all of $PATH as aliases
if os.name == 'posix':
    # %rehash is very fast, but it doesn't check for executability, it simply
    # dumps everything in $PATH as an alias. Use rehashx if you want more
    # checks.
    __IPYTHON__.magic_rehash()
else:
    # Windows users: the list of extensions considered executable is read from
    # the environment variable 'pathext'.  If this is undefined, IPython
    # defaults to EXE, COM and BAT.
    # %rehashx is the one which does extension analysis, at the cost of
    # being much slower than %rehash.
    __IPYTHON__.magic_rehashx()

# Remove %sc,%sx if present as aliases
__IPYTHON__.magic_unalias('sc')
__IPYTHON__.magic_unalias('sx')

# We need different criteria for line-splitting, so that aliases such as
# 'gnome-terminal' are interpreted as a single alias instead of variable
# 'gnome' minus variable 'terminal'.
import re
__IPYTHON__.line_split = re.compile(r'(^[\s*!\?%,/]?)([\?\w\.\-\+]+\w*\s*)(\(?.*$)')

# Namespace cleanup
del re