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# The MIT License
#
# Copyright (c) 2008 Bob Farrell
# Copyright (c) 2012-2025 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.
# To gradually migrate to mypy we aren't setting these globally yet
# mypy: disallow_untyped_defs=True
# mypy: disallow_untyped_calls=True
"""
Module to handle command line argument parsing, for all front-ends.
"""
import argparse
import code
import importlib.util
import logging
import os
import sys
from pathlib import Path
from collections.abc import Callable
from types import ModuleType
from typing import Never
from . import __version__, __copyright__
from .config import default_config_path, Config
from .translations import _
logger = logging.getLogger(__name__)
class ArgumentParserFailed(ValueError):
"""Raised by the RaisingOptionParser for a bogus commandline."""
class RaisingArgumentParser(argparse.ArgumentParser):
def error(self, message: str) -> Never:
raise ArgumentParserFailed()
def version_banner(base: str = "bpython") -> str:
return _("{} version {} on top of Python {} {}").format(
base,
__version__,
sys.version.split()[0],
sys.executable,
)
def copyright_banner() -> str:
return _("{} See AUTHORS.rst for details.").format(__copyright__)
def log_version(module: ModuleType, name: str) -> None:
logger.info("%s: %s", name, module.__version__ if hasattr(module, "__version__") else "unknown version") # type: ignore
Options = tuple[str, str, Callable[[argparse._ArgumentGroup], None]]
def parse(
args: list[str] | None,
extras: Options | None = None,
ignore_stdin: bool = False,
) -> tuple[Config, argparse.Namespace, list[str]]:
"""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(),
type=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 print version banner."),
)
parser.add_argument(
"--version",
"-V",
action="store_true",
help=_("Print version and exit."),
)
parser.add_argument(
"--log-level",
"-l",
choices=("debug", "info", "warning", "error", "critical"),
default="error",
help=_("Set log level for logging"),
)
parser.add_argument(
"--log-output",
"-L",
help=_("Log output file"),
)
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 execute 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()):
# Just let Python handle this
os.execv(sys.executable, [sys.executable] + args)
# Configure logging handler
bpython_logger = logging.getLogger("bpython")
curtsies_logger = logging.getLogger("curtsies")
bpython_logger.setLevel(options.log_level.upper())
curtsies_logger.setLevel(options.log_level.upper())
if options.log_output:
handler = logging.FileHandler(filename=options.log_output)
handler.setFormatter(
logging.Formatter(
"%(asctime)s: %(name)s: %(levelname)s: %(message)s"
)
)
bpython_logger.addHandler(handler)
curtsies_logger.addHandler(handler)
bpython_logger.propagate = curtsies_logger.propagate = False
else:
bpython_logger.addHandler(logging.NullHandler())
curtsies_logger.addHandler(logging.NullHandler())
import cwcwidth
import greenlet
import pygments
import requests
import xdg
logger.info("Starting bpython %s", __version__)
logger.info("Python %s: %s", sys.executable, sys.version_info)
# versions of required dependencies
try:
import curtsies
log_version(curtsies, "curtsies")
except ImportError:
# may happen on Windows
logger.info("curtsies: not available")
log_version(cwcwidth, "cwcwidth")
log_version(greenlet, "greenlet")
log_version(pygments, "pygments")
log_version(xdg, "pyxdg")
log_version(requests, "requests")
# versions of optional dependencies
try:
import pyperclip
log_version(pyperclip, "pyperclip")
except ImportError:
logger.info("pyperclip: not available")
try:
import jedi
log_version(jedi, "jedi")
except ImportError:
logger.info("jedi: not available")
try:
import watchdog
logger.info("watchdog: available")
except ImportError:
logger.info("watchdog: not available")
logger.info("environment:")
for key, value in sorted(os.environ.items()):
if key.startswith("LC") or key.startswith("LANG") or key == "TERM":
logger.info("%s: %s", key, value)
return Config(options.config), options, options.args
def exec_code(
interpreter: code.InteractiveInterpreter, args: list[str]
) -> None:
"""
Helper to execute code in a given interpreter, e.g. to implement the behavior of python3 [-i] file.py
args should be a [faked] sys.argv.
"""
try:
with open(args[0]) as sourcefile:
source = sourcefile.read()
except OSError as e:
# print an error and exit (if -i is specified the calling code will continue)
print(f"bpython: can't open file '{args[0]}: {e}", file=sys.stderr)
raise SystemExit(e.errno)
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("__main__", loader=None)
assert spec
mod = importlib.util.module_from_spec(spec)
sys.modules["__main__"] = mod
interpreter.locals.update(mod.__dict__) # type: ignore # TODO use a more specific type that has a .locals attribute
interpreter.locals["__file__"] = args[0] # type: ignore # TODO use a more specific type that has a .locals attribute
interpreter.runsource(source, args[0], "exec")
sys.argv = old_argv