#! /usr/bin/env mpscript
# 
# This script starts an interactive Python shell with the MX database
# already set up.
#

import code
import os

try:
    import atexit
except:
    pass

if ( os.name == "posix" ):
    try:
        import readline

        # Derived from the example in the Python documentation.
    
        class ReadlineConsole(code.InteractiveConsole):
            def __init__( self, locals=None, filename="<console>",
                        histfile=os.path.expanduser("~/.mx/mpshell.history") ):
    
                code.InteractiveConsole.__init__( self, locals, filename )
                self.init_history( histfile )
    
            def init_history( self, histfile ):
                readline.parse_and_bind( "tab: complete" )
                if hasattr( readline, "read_history_file" ):
                    try:
                        readline.read_history_file( histfile )
                    except IOError:
                        pass
    
                    try:
                        atexit.register( self.save_history, histfile )
                    except:
                        pass
    
            def save_history( self, histfile ):
                try:
                    readline.write_history_file( histfile )
                except IOError:
                    dir = os.path.expanduser("~/.mx")
                    os.mkdir( dir )
                    readline.write_history_file( histfile )
    
        console_class = ReadlineConsole

    except:
        # Readline is not present, so use the plain vanilla console instead.

        console_class = code.InteractiveConsole
else:
    console_class = code.InteractiveConsole

def main( mx_database, argv ):

    namespace = globals().copy()
    namespace.update( locals() )

    s = console_class( namespace )

    s.interact( "(MX Python Interactive Console)" )