523 lines
20 KiB
Python
523 lines
20 KiB
Python
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import argparse
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import sys
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import warnings
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from gettext import gettext
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from typing import Any
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from typing import Callable
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from typing import cast
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from typing import Dict
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from typing import List
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from typing import Mapping
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from typing import Optional
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from typing import Sequence
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from typing import Tuple
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from typing import TYPE_CHECKING
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from typing import Union
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import py
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import _pytest._io
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from _pytest.compat import final
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from _pytest.config.exceptions import UsageError
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if TYPE_CHECKING:
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from typing import NoReturn
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from typing_extensions import Literal
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FILE_OR_DIR = "file_or_dir"
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@final
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class Parser:
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"""Parser for command line arguments and ini-file values.
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:ivar extra_info: Dict of generic param -> value to display in case
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there's an error processing the command line arguments.
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"""
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prog: Optional[str] = None
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def __init__(
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self,
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usage: Optional[str] = None,
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processopt: Optional[Callable[["Argument"], None]] = None,
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) -> None:
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self._anonymous = OptionGroup("custom options", parser=self)
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self._groups: List[OptionGroup] = []
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self._processopt = processopt
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self._usage = usage
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self._inidict: Dict[str, Tuple[str, Optional[str], Any]] = {}
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self._ininames: List[str] = []
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self.extra_info: Dict[str, Any] = {}
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def processoption(self, option: "Argument") -> None:
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if self._processopt:
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if option.dest:
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self._processopt(option)
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def getgroup(
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self, name: str, description: str = "", after: Optional[str] = None
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) -> "OptionGroup":
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"""Get (or create) a named option Group.
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:name: Name of the option group.
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:description: Long description for --help output.
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:after: Name of another group, used for ordering --help output.
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The returned group object has an ``addoption`` method with the same
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signature as :py:func:`parser.addoption
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<_pytest.config.argparsing.Parser.addoption>` but will be shown in the
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respective group in the output of ``pytest. --help``.
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"""
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for group in self._groups:
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if group.name == name:
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return group
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group = OptionGroup(name, description, parser=self)
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i = 0
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for i, grp in enumerate(self._groups):
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if grp.name == after:
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break
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self._groups.insert(i + 1, group)
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return group
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def addoption(self, *opts: str, **attrs: Any) -> None:
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"""Register a command line option.
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:opts: Option names, can be short or long options.
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:attrs: Same attributes which the ``add_argument()`` function of the
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`argparse library <https://docs.python.org/library/argparse.html>`_
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accepts.
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After command line parsing, options are available on the pytest config
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object via ``config.option.NAME`` where ``NAME`` is usually set
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by passing a ``dest`` attribute, for example
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``addoption("--long", dest="NAME", ...)``.
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"""
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self._anonymous.addoption(*opts, **attrs)
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def parse(
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self,
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args: Sequence[Union[str, py.path.local]],
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namespace: Optional[argparse.Namespace] = None,
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) -> argparse.Namespace:
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from _pytest._argcomplete import try_argcomplete
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self.optparser = self._getparser()
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try_argcomplete(self.optparser)
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strargs = [str(x) if isinstance(x, py.path.local) else x for x in args]
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return self.optparser.parse_args(strargs, namespace=namespace)
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def _getparser(self) -> "MyOptionParser":
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from _pytest._argcomplete import filescompleter
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optparser = MyOptionParser(self, self.extra_info, prog=self.prog)
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groups = self._groups + [self._anonymous]
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for group in groups:
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if group.options:
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desc = group.description or group.name
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arggroup = optparser.add_argument_group(desc)
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for option in group.options:
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n = option.names()
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a = option.attrs()
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arggroup.add_argument(*n, **a)
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file_or_dir_arg = optparser.add_argument(FILE_OR_DIR, nargs="*")
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# bash like autocompletion for dirs (appending '/')
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# Type ignored because typeshed doesn't know about argcomplete.
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file_or_dir_arg.completer = filescompleter # type: ignore
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return optparser
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def parse_setoption(
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self,
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args: Sequence[Union[str, py.path.local]],
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option: argparse.Namespace,
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namespace: Optional[argparse.Namespace] = None,
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) -> List[str]:
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parsedoption = self.parse(args, namespace=namespace)
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for name, value in parsedoption.__dict__.items():
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setattr(option, name, value)
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return cast(List[str], getattr(parsedoption, FILE_OR_DIR))
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def parse_known_args(
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self,
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args: Sequence[Union[str, py.path.local]],
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namespace: Optional[argparse.Namespace] = None,
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) -> argparse.Namespace:
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"""Parse and return a namespace object with known arguments at this point."""
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return self.parse_known_and_unknown_args(args, namespace=namespace)[0]
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def parse_known_and_unknown_args(
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self,
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args: Sequence[Union[str, py.path.local]],
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namespace: Optional[argparse.Namespace] = None,
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) -> Tuple[argparse.Namespace, List[str]]:
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"""Parse and return a namespace object with known arguments, and
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the remaining arguments unknown at this point."""
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optparser = self._getparser()
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strargs = [str(x) if isinstance(x, py.path.local) else x for x in args]
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return optparser.parse_known_args(strargs, namespace=namespace)
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def addini(
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self,
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name: str,
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help: str,
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type: Optional[
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"Literal['string', 'pathlist', 'args', 'linelist', 'bool']"
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] = None,
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default=None,
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) -> None:
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"""Register an ini-file option.
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:name: Name of the ini-variable.
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:type: Type of the variable, can be ``string``, ``pathlist``, ``args``,
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``linelist`` or ``bool``. Defaults to ``string`` if ``None`` or
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not passed.
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:default: Default value if no ini-file option exists but is queried.
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The value of ini-variables can be retrieved via a call to
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:py:func:`config.getini(name) <_pytest.config.Config.getini>`.
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"""
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assert type in (None, "string", "pathlist", "args", "linelist", "bool")
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self._inidict[name] = (help, type, default)
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self._ininames.append(name)
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class ArgumentError(Exception):
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"""Raised if an Argument instance is created with invalid or
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inconsistent arguments."""
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def __init__(self, msg: str, option: Union["Argument", str]) -> None:
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self.msg = msg
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self.option_id = str(option)
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def __str__(self) -> str:
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if self.option_id:
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return f"option {self.option_id}: {self.msg}"
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else:
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return self.msg
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class Argument:
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"""Class that mimics the necessary behaviour of optparse.Option.
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It's currently a least effort implementation and ignoring choices
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and integer prefixes.
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https://docs.python.org/3/library/optparse.html#optparse-standard-option-types
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"""
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_typ_map = {"int": int, "string": str, "float": float, "complex": complex}
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def __init__(self, *names: str, **attrs: Any) -> None:
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"""Store parms in private vars for use in add_argument."""
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self._attrs = attrs
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self._short_opts: List[str] = []
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self._long_opts: List[str] = []
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if "%default" in (attrs.get("help") or ""):
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warnings.warn(
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'pytest now uses argparse. "%default" should be'
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' changed to "%(default)s" ',
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DeprecationWarning,
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stacklevel=3,
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)
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try:
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typ = attrs["type"]
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except KeyError:
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pass
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else:
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# This might raise a keyerror as well, don't want to catch that.
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if isinstance(typ, str):
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if typ == "choice":
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warnings.warn(
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"`type` argument to addoption() is the string %r."
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" For choices this is optional and can be omitted, "
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" but when supplied should be a type (for example `str` or `int`)."
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" (options: %s)" % (typ, names),
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DeprecationWarning,
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stacklevel=4,
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)
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# argparse expects a type here take it from
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# the type of the first element
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attrs["type"] = type(attrs["choices"][0])
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else:
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warnings.warn(
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"`type` argument to addoption() is the string %r, "
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" but when supplied should be a type (for example `str` or `int`)."
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" (options: %s)" % (typ, names),
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DeprecationWarning,
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stacklevel=4,
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)
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attrs["type"] = Argument._typ_map[typ]
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# Used in test_parseopt -> test_parse_defaultgetter.
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self.type = attrs["type"]
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else:
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self.type = typ
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try:
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# Attribute existence is tested in Config._processopt.
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self.default = attrs["default"]
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except KeyError:
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pass
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self._set_opt_strings(names)
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dest: Optional[str] = attrs.get("dest")
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if dest:
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self.dest = dest
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elif self._long_opts:
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self.dest = self._long_opts[0][2:].replace("-", "_")
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else:
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try:
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self.dest = self._short_opts[0][1:]
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except IndexError as e:
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self.dest = "???" # Needed for the error repr.
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raise ArgumentError("need a long or short option", self) from e
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def names(self) -> List[str]:
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return self._short_opts + self._long_opts
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def attrs(self) -> Mapping[str, Any]:
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# Update any attributes set by processopt.
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attrs = "default dest help".split()
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attrs.append(self.dest)
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for attr in attrs:
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try:
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self._attrs[attr] = getattr(self, attr)
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except AttributeError:
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pass
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if self._attrs.get("help"):
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a = self._attrs["help"]
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a = a.replace("%default", "%(default)s")
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# a = a.replace('%prog', '%(prog)s')
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self._attrs["help"] = a
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return self._attrs
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def _set_opt_strings(self, opts: Sequence[str]) -> None:
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"""Directly from optparse.
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Might not be necessary as this is passed to argparse later on.
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"""
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for opt in opts:
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if len(opt) < 2:
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raise ArgumentError(
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"invalid option string %r: "
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"must be at least two characters long" % opt,
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self,
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)
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elif len(opt) == 2:
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if not (opt[0] == "-" and opt[1] != "-"):
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raise ArgumentError(
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"invalid short option string %r: "
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"must be of the form -x, (x any non-dash char)" % opt,
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self,
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)
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self._short_opts.append(opt)
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else:
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if not (opt[0:2] == "--" and opt[2] != "-"):
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raise ArgumentError(
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"invalid long option string %r: "
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"must start with --, followed by non-dash" % opt,
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self,
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)
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self._long_opts.append(opt)
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def __repr__(self) -> str:
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args: List[str] = []
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if self._short_opts:
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args += ["_short_opts: " + repr(self._short_opts)]
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if self._long_opts:
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args += ["_long_opts: " + repr(self._long_opts)]
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args += ["dest: " + repr(self.dest)]
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if hasattr(self, "type"):
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args += ["type: " + repr(self.type)]
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if hasattr(self, "default"):
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args += ["default: " + repr(self.default)]
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return "Argument({})".format(", ".join(args))
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class OptionGroup:
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def __init__(
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self, name: str, description: str = "", parser: Optional[Parser] = None
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) -> None:
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self.name = name
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self.description = description
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self.options: List[Argument] = []
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self.parser = parser
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def addoption(self, *optnames: str, **attrs: Any) -> None:
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"""Add an option to this group.
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If a shortened version of a long option is specified, it will
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be suppressed in the help. addoption('--twowords', '--two-words')
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results in help showing '--two-words' only, but --twowords gets
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accepted **and** the automatic destination is in args.twowords.
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"""
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conflict = set(optnames).intersection(
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name for opt in self.options for name in opt.names()
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)
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if conflict:
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raise ValueError("option names %s already added" % conflict)
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option = Argument(*optnames, **attrs)
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self._addoption_instance(option, shortupper=False)
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def _addoption(self, *optnames: str, **attrs: Any) -> None:
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option = Argument(*optnames, **attrs)
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self._addoption_instance(option, shortupper=True)
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def _addoption_instance(self, option: "Argument", shortupper: bool = False) -> None:
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if not shortupper:
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for opt in option._short_opts:
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if opt[0] == "-" and opt[1].islower():
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raise ValueError("lowercase shortoptions reserved")
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if self.parser:
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self.parser.processoption(option)
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self.options.append(option)
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class MyOptionParser(argparse.ArgumentParser):
|
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|
def __init__(
|
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|
self,
|
||
|
|
parser: Parser,
|
||
|
|
extra_info: Optional[Dict[str, Any]] = None,
|
||
|
|
prog: Optional[str] = None,
|
||
|
|
) -> None:
|
||
|
|
self._parser = parser
|
||
|
|
argparse.ArgumentParser.__init__(
|
||
|
|
self,
|
||
|
|
prog=prog,
|
||
|
|
usage=parser._usage,
|
||
|
|
add_help=False,
|
||
|
|
formatter_class=DropShorterLongHelpFormatter,
|
||
|
|
allow_abbrev=False,
|
||
|
|
)
|
||
|
|
# extra_info is a dict of (param -> value) to display if there's
|
||
|
|
# an usage error to provide more contextual information to the user.
|
||
|
|
self.extra_info = extra_info if extra_info else {}
|
||
|
|
|
||
|
|
def error(self, message: str) -> "NoReturn":
|
||
|
|
"""Transform argparse error message into UsageError."""
|
||
|
|
msg = f"{self.prog}: error: {message}"
|
||
|
|
|
||
|
|
if hasattr(self._parser, "_config_source_hint"):
|
||
|
|
# Type ignored because the attribute is set dynamically.
|
||
|
|
msg = f"{msg} ({self._parser._config_source_hint})" # type: ignore
|
||
|
|
|
||
|
|
raise UsageError(self.format_usage() + msg)
|
||
|
|
|
||
|
|
# Type ignored because typeshed has a very complex type in the superclass.
|
||
|
|
def parse_args( # type: ignore
|
||
|
|
self,
|
||
|
|
args: Optional[Sequence[str]] = None,
|
||
|
|
namespace: Optional[argparse.Namespace] = None,
|
||
|
|
) -> argparse.Namespace:
|
||
|
|
"""Allow splitting of positional arguments."""
|
||
|
|
parsed, unrecognized = self.parse_known_args(args, namespace)
|
||
|
|
if unrecognized:
|
||
|
|
for arg in unrecognized:
|
||
|
|
if arg and arg[0] == "-":
|
||
|
|
lines = ["unrecognized arguments: %s" % (" ".join(unrecognized))]
|
||
|
|
for k, v in sorted(self.extra_info.items()):
|
||
|
|
lines.append(f" {k}: {v}")
|
||
|
|
self.error("\n".join(lines))
|
||
|
|
getattr(parsed, FILE_OR_DIR).extend(unrecognized)
|
||
|
|
return parsed
|
||
|
|
|
||
|
|
if sys.version_info[:2] < (3, 9): # pragma: no cover
|
||
|
|
# Backport of https://github.com/python/cpython/pull/14316 so we can
|
||
|
|
# disable long --argument abbreviations without breaking short flags.
|
||
|
|
def _parse_optional(
|
||
|
|
self, arg_string: str
|
||
|
|
) -> Optional[Tuple[Optional[argparse.Action], str, Optional[str]]]:
|
||
|
|
if not arg_string:
|
||
|
|
return None
|
||
|
|
if not arg_string[0] in self.prefix_chars:
|
||
|
|
return None
|
||
|
|
if arg_string in self._option_string_actions:
|
||
|
|
action = self._option_string_actions[arg_string]
|
||
|
|
return action, arg_string, None
|
||
|
|
if len(arg_string) == 1:
|
||
|
|
return None
|
||
|
|
if "=" in arg_string:
|
||
|
|
option_string, explicit_arg = arg_string.split("=", 1)
|
||
|
|
if option_string in self._option_string_actions:
|
||
|
|
action = self._option_string_actions[option_string]
|
||
|
|
return action, option_string, explicit_arg
|
||
|
|
if self.allow_abbrev or not arg_string.startswith("--"):
|
||
|
|
option_tuples = self._get_option_tuples(arg_string)
|
||
|
|
if len(option_tuples) > 1:
|
||
|
|
msg = gettext(
|
||
|
|
"ambiguous option: %(option)s could match %(matches)s"
|
||
|
|
)
|
||
|
|
options = ", ".join(option for _, option, _ in option_tuples)
|
||
|
|
self.error(msg % {"option": arg_string, "matches": options})
|
||
|
|
elif len(option_tuples) == 1:
|
||
|
|
(option_tuple,) = option_tuples
|
||
|
|
return option_tuple
|
||
|
|
if self._negative_number_matcher.match(arg_string):
|
||
|
|
if not self._has_negative_number_optionals:
|
||
|
|
return None
|
||
|
|
if " " in arg_string:
|
||
|
|
return None
|
||
|
|
return None, arg_string, None
|
||
|
|
|
||
|
|
|
||
|
|
class DropShorterLongHelpFormatter(argparse.HelpFormatter):
|
||
|
|
"""Shorten help for long options that differ only in extra hyphens.
|
||
|
|
|
||
|
|
- Collapse **long** options that are the same except for extra hyphens.
|
||
|
|
- Shortcut if there are only two options and one of them is a short one.
|
||
|
|
- Cache result on the action object as this is called at least 2 times.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def __init__(self, *args: Any, **kwargs: Any) -> None:
|
||
|
|
# Use more accurate terminal width.
|
||
|
|
if "width" not in kwargs:
|
||
|
|
kwargs["width"] = _pytest._io.get_terminal_width()
|
||
|
|
super().__init__(*args, **kwargs)
|
||
|
|
|
||
|
|
def _format_action_invocation(self, action: argparse.Action) -> str:
|
||
|
|
orgstr = argparse.HelpFormatter._format_action_invocation(self, action)
|
||
|
|
if orgstr and orgstr[0] != "-": # only optional arguments
|
||
|
|
return orgstr
|
||
|
|
res: Optional[str] = getattr(action, "_formatted_action_invocation", None)
|
||
|
|
if res:
|
||
|
|
return res
|
||
|
|
options = orgstr.split(", ")
|
||
|
|
if len(options) == 2 and (len(options[0]) == 2 or len(options[1]) == 2):
|
||
|
|
# a shortcut for '-h, --help' or '--abc', '-a'
|
||
|
|
action._formatted_action_invocation = orgstr # type: ignore
|
||
|
|
return orgstr
|
||
|
|
return_list = []
|
||
|
|
short_long: Dict[str, str] = {}
|
||
|
|
for option in options:
|
||
|
|
if len(option) == 2 or option[2] == " ":
|
||
|
|
continue
|
||
|
|
if not option.startswith("--"):
|
||
|
|
raise ArgumentError(
|
||
|
|
'long optional argument without "--": [%s]' % (option), option
|
||
|
|
)
|
||
|
|
xxoption = option[2:]
|
||
|
|
shortened = xxoption.replace("-", "")
|
||
|
|
if shortened not in short_long or len(short_long[shortened]) < len(
|
||
|
|
xxoption
|
||
|
|
):
|
||
|
|
short_long[shortened] = xxoption
|
||
|
|
# now short_long has been filled out to the longest with dashes
|
||
|
|
# **and** we keep the right option ordering from add_argument
|
||
|
|
for option in options:
|
||
|
|
if len(option) == 2 or option[2] == " ":
|
||
|
|
return_list.append(option)
|
||
|
|
if option[2:] == short_long.get(option.replace("-", "")):
|
||
|
|
return_list.append(option.replace(" ", "=", 1))
|
||
|
|
formatted_action_invocation = ", ".join(return_list)
|
||
|
|
action._formatted_action_invocation = formatted_action_invocation # type: ignore
|
||
|
|
return formatted_action_invocation
|
||
|
|
|
||
|
|
def _split_lines(self, text, width):
|
||
|
|
"""Wrap lines after splitting on original newlines.
|
||
|
|
|
||
|
|
This allows to have explicit line breaks in the help text.
|
||
|
|
"""
|
||
|
|
import textwrap
|
||
|
|
|
||
|
|
lines = []
|
||
|
|
for line in text.splitlines():
|
||
|
|
lines.extend(textwrap.wrap(line.strip(), width))
|
||
|
|
return lines
|