""" Module to handle command line argument parsing, for all front-ends. """ from __future__ import with_statement import os import sys import code from optparse import OptionParser, OptionGroup from bpython import __version__ from bpython.config import loadini, Struct, migrate_rc class OptionParserFailed(ValueError): """Raised by the RaisingOptionParser for a bogus commandline.""" class RaisingOptionParser(OptionParser): def error(self, msg): raise OptionParserFailed() def parse(args, extras=None): """Receive an argument list - if None, use sys.argv - parse all args and take appropriate action. Also receive optional extra options: this should be a tuple of (title, description, options) title: The title for the option group description: A full description of the option group options: A list of optparse.Option objects to be added to the group e.g.: parse(['-i', '-m', 'foo.py'], ('Front end-specific options', 'A full description of what these options are for', [optparse.Option('-f', action='store_true', dest='f', help='Explode'), optparse.Option('-l', action='store_true', dest='l', help='Love')])) Return a tuple of (config, options, exec_args) wherein "config" is the config object either parsed from a default/specified config file or default config options, "options" is the parsed options from OptionParser.parse_args, and "exec_args" are the args (if any) to be parsed to the executed file (if any). """ if args is None: args = sys.argv[1:] parser = RaisingOptionParser( usage='Usage: %prog [options] [file [args]]\n' 'NOTE: If bpython sees an argument it does ' 'not know, execution falls back to the ' 'regular Python interpreter.') # This is not sufficient if bpython gains its own -m support # (instead of falling back to Python itself for that). # That's probably fixable though, for example by having that # option swallow all remaining arguments in a callback. parser.disable_interspersed_args() parser.add_option('--config', '-c', default='~/.bpython/config', help='use CONFIG instead of default config file') parser.add_option('--interactive', '-i', action='store_true', help='Drop to bpython shell after running file ' 'instead of exiting') parser.add_option('--quiet', '-q', action='store_true', help="Don't flush the output to stdout.") parser.add_option('--version', '-V', action='store_true', help='print version and exit') if extras is not None: extras_group = OptionGroup(parser, extras[0], extras[1]) for option in extras[2]: extras_group.add_option(option) parser.add_option_group(extras_group) try: options, args = parser.parse_args(args) except OptionParserFailed: # Just let Python handle this os.execv(sys.executable, [sys.executable] + args) if options.version: print 'bpython version', __version__, print 'on top of Python', sys.version.split()[0] print ('(C) 2008-2010 Bob Farrell, Andreas Stuehrk et al. ' 'See AUTHORS for detail.') raise SystemExit if not (sys.stdin.isatty() and sys.stdout.isatty()): interpreter = code.InteractiveInterpreter() interpreter.runsource(sys.stdin.read()) raise SystemExit path = os.path.expanduser('~/.bpythonrc') # migrating old configuration file if os.path.isfile(path): migrate_rc(path) config = Struct() loadini(config, options.config) return config, options, args def exec_code(interpreter, args): """ Helper to execute code in a given interpreter. args should be a [faked] sys.argv """ with open(args[0], 'r') as sourcefile: code_obj = compile(sourcefile.read(), args[0], 'exec') old_argv, sys.argv = sys.argv, args sys.path.insert(0, os.path.abspath(os.path.dirname(args[0]))) interpreter.runcode(code_obj) sys.argv = old_argv