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173 lines (145 loc) · 5.53 KB
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# The MIT License
#
# Copyright (c) 2008 Bob Farrell
# Copyright (c) 2012-2020 Sebastian Ramacher
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
"""
Module to handle command line argument parsing, for all front-ends.
"""
import code
import importlib.util
import os
import sys
import argparse
from . import __version__, __copyright__
from .config import default_config_path, loadini, Struct
from .translations import _
class ArgumentParserFailed(ValueError):
"""Raised by the RaisingOptionParser for a bogus commandline."""
class RaisingArgumentParser(argparse.ArgumentParser):
def error(self, msg):
raise ArgumentParserFailed()
def version_banner(base="bpython"):
return "{} version {} on top of Python {} {}".format(
base,
__version__,
sys.version.split()[0],
sys.executable,
)
def copyright_banner():
return "{} See AUTHORS.rst for details.".format(__copyright__)
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 argument: this should
be a tuple of (title, description, callback)
title: The title for the argument group
description: A full description of the argument group
callback: A callback that adds argument to the argument group
e.g.:
def callback(group):
group.add_argument('-f', action='store_true', dest='f', help='Explode')
group.add_argument('-l', action='store_true', dest='l', help='Love')
parse(
['-i', '-m', 'foo.py'],
('Front end-specific options',
'A full description of what these options are for',
callback))
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
ArgumentParser.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 = RaisingArgumentParser(
usage=_(
"Usage: %(prog)s [options] [file [args]]\n"
"NOTE: If bpython sees an argument it does "
"not know, execution falls back to the "
"regular Python interpreter."
)
)
parser.add_argument(
"--config",
default=default_config_path(),
help=_("Use CONFIG instead of default config file."),
)
parser.add_argument(
"--interactive",
"-i",
action="store_true",
help=_("Drop to bpython shell after running file instead of exiting."),
)
parser.add_argument(
"--quiet",
"-q",
action="store_true",
help=_("Don't flush the output to stdout."),
)
parser.add_argument(
"--version",
"-V",
action="store_true",
help=_("Print version and exit."),
)
if extras is not None:
extras_group = parser.add_argument_group(extras[0], extras[1])
extras[2](extras_group)
# collect all the remaining arguments into a list
parser.add_argument(
"args",
nargs=argparse.REMAINDER,
help=_(
"File to extecute and additional arguments passed on to the executed script."
),
)
try:
options = parser.parse_args(args)
except ArgumentParserFailed:
# Just let Python handle this
os.execv(sys.executable, [sys.executable] + args)
if options.version:
print(version_banner())
print(copyright_banner())
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, 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]) as sourcefile:
source = sourcefile.read()
old_argv, sys.argv = sys.argv, args
sys.path.insert(0, os.path.abspath(os.path.dirname(args[0])))
spec = importlib.util.spec_from_loader("__console__", loader=None)
mod = importlib.util.module_from_spec(spec)
sys.modules["__console__"] = mod
interpreter.locals = mod.__dict__
interpreter.locals["__file__"] = args[0]
interpreter.runsource(source, args[0], "exec")
sys.argv = old_argv