""" Module to handle command line argument parsing, for all front-ends. """ from __future__ import print_function import code import imp import os import sys from optparse import OptionParser, OptionGroup from bpython import __version__ from bpython.config import default_config_path, loadini, Struct from bpython.translations import _ class OptionParserFailed(ValueError): """Raised by the RaisingOptionParser for a bogus commandline.""" class RaisingOptionParser(OptionParser): def error(self, msg): raise OptionParserFailed() def version_banner(): return 'bpython version %s on top of Python %s %s' % ( __version__, sys.version.split()[0], sys.executable) def parse(args, extras=None, ignore_stdin=False): """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', default=default_config_path(), 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__, end=" ") print('on top of Python', sys.version.split()[0]) print('(C) 2008-2015 Bob Farrell, Andreas Stuehrk et al. ' 'See AUTHORS for detail.') raise SystemExit if not ignore_stdin and not (sys.stdin.isatty() and sys.stdout.isatty()): interpreter = code.InteractiveInterpreter() interpreter.runsource(sys.stdin.read()) raise SystemExit 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: source = sourcefile.read() old_argv, sys.argv = sys.argv, args sys.path.insert(0, os.path.abspath(os.path.dirname(args[0]))) mod = imp.new_module('__console__') sys.modules['__console__'] = mod interpreter.locals = mod.__dict__ interpreter.locals['__file__'] = args[0] interpreter.runsource(source, args[0], 'exec') sys.argv = old_argv