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args.py
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# The MIT License
#
# Copyright (c) 2008 Bob Farrell
# Copyright (c) 2012-2021 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.
"""
importargparse
fromtypingimportTuple,List,Optional,NoReturn,Callable
importcode
importcurtsies
importcwcwidth
importgreenlet
importimportlib.util
importlogging
importos
importpygments
importrequests
importsys
frompathlibimportPath
from .import__version__,__copyright__
from .configimportdefault_config_path,Config
from .translationsimport_
logger=logging.getLogger(__name__)
classArgumentParserFailed(ValueError):
"""Raised by the RaisingOptionParser for a bogus commandline."""
classRaisingArgumentParser(argparse.ArgumentParser):
deferror(self,msg:str)->NoReturn:
raiseArgumentParserFailed()
defversion_banner(base:str="bpython")->str:
return_("{} version {} on top of Python {} {}").format(
base,
__version__,
sys.version.split()[0],
sys.executable,
)
defcopyright_banner()->str:
return_("{} See AUTHORS.rst for details.").format(__copyright__)
Options=Tuple[str,str,Callable[[argparse._ArgumentGroup],None]]
defparse(
args:Optional[List[str]],
extras:Optional[Options]=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).
"""
ifargsisNone:
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 flush the output to stdout."),
)
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"),
)
ifextrasisnotNone:
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)
exceptArgumentParserFailed:
# Just let Python handle this
os.execv(sys.executable, [sys.executable]+args)
ifoptions.version:
print(version_banner())
print(copyright_banner())
raiseSystemExit
ifnotignore_stdinandnot (sys.stdin.isatty()andsys.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())
ifoptions.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())
logger.info(f"Starting bpython{__version__}")
logger.info(f"Python{sys.executable}:{sys.version_info}")
logger.info(f"curtsies:{curtsies.__version__}")
logger.info(f"cwcwidth:{cwcwidth.__version__}")
logger.info(f"greenlet:{greenlet.__version__}")
logger.info(f"pygments:{pygments.__version__}")# type: ignore
logger.info(f"requests:{requests.__version__}")
logger.info(
"environment:\n{}".format(
"\n".join(
f"{key}:{value}"
forkey,valueinsorted(os.environ.items())
ifkey.startswith("LC")
orkey.startswith("LANG")
orkey=="TERM"
)
)
)
returnConfig(options.config),options,options.args
defexec_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:
withopen(args[0])assourcefile:
source=sourcefile.read()
exceptOSErrorase:
# 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)
raiseSystemExit(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)
assertspec
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