"""Base option parser setup"""
import logging
import optparse
import shutil
import sys
import textwrap
from contextlib import suppress
from typing import Any, Dict, Generator, List, Tuple
from pip._internal.cli.status_codes import UNKNOWN_ERROR
from pip._internal.configuration import Configuration, ConfigurationError
from pip._internal.utils.misc import redact_auth_from_url, strtobool
logger = logging.getLogger(__name__)
class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
"""A prettier/less verbose help formatter for optparse."""
def __init__(self, *args: Any, **kwargs: Any) -> None:
# help position must be aligned with __init__.parseopts.description
kwargs["max_help_position"] = 30
kwargs["indent_increment"] = 1
kwargs["width"] = shutil.get_terminal_size()[0] - 2
super().__init__(*args, **kwargs)
def format_option_strings(self, option: optparse.Option) -> str:
return self._format_option_strings(option)
def _format_option_strings(
self, option: optparse.Option, mvarfmt: str = " <{}>", optsep: str = ", "
) -> str:
"""
Return a comma-separated list of option strings and metavars.
:param option: tuple of (short opt, long opt), e.g: ('-f', '--format')
:param mvarfmt: metavar format string
:param optsep: separator
"""
opts = []
if option._short_opts:
opts.append(option._short_opts[0])
if option._long_opts:
opts.append(option._long_opts[0])
if len(opts) > 1:
opts.insert(1, optsep)
if option.takes_value():
assert option.dest is not None
metavar = option.metavar or option.dest.lower()
opts.append(mvarfmt.format(metavar.lower()))
return "".join(opts)
def format_heading(self, heading: str) -> str:
if heading == "Options":
return ""
return heading + ":\n"
def format_usage(self, usage: str) -> str:
"""
Ensure there is only one newline between usage and the first heading
if there is no description.
"""
msg = "\nUsage: {}\n".format(self.indent_lines(textwrap.dedent(usage), " "))
return msg
def format_description(self, description: str) -> str:
# leave full control over description to us
if description:
if hasattr(self.parser, "main"):
label = "Commands"
else:
label = "Description"
# some doc strings have initial newlines, some don't
description = description.lstrip("\n")
# some doc strings have final newlines and spaces, some don't
description = description.rstrip()
# dedent, then reindent
description = self.indent_lines(textwrap.dedent(description), " ")
description = f"{label}:\n{description}\n"
return description
else:
return ""
def format_epilog(self, epilog: str) -> str:
# leave full control over epilog to us
if epilog:
return epilog
else:
return ""
def indent_lines(self, text: str, indent: str) -> str:
new_lines = [indent + line for line in text.split("\n")]
return "\n".join(new_lines)
class UpdatingDefaultsHelpFormatter(PrettyHelpFormatter):
"""Custom help formatter for use in ConfigOptionParser.
This is updates the defaults before expanding them, allowing
them to show up correctly in the help listing.
Also redact auth from url type options
"""
def expand_default(self, option: optparse.Option) -> str:
default_values = None
if self.parser is not None:
assert isinstance(self.parser, ConfigOptionParser)
self.parser._update_defaults(self.parser.defaults)
assert option.dest is not None
default_values = self.parser.defaults.get(option.dest)
help_text = super().expand_default(option)
if default_values and option.metavar == "URL":
if isinstance(default_values, str):
default_values = [default_values]
# If its not a list, we should abort and just return the help text
if not isinstance(default_values, list):
default_values = []
for val in default_values:
help_text = help_text.replace(val, redact_auth_from_url(val))
return help_text
class CustomOptionParser(optparse.OptionParser):
def insert_option_group(
self, idx: int, *args: Any, **kwargs: Any
) -> optparse.OptionGroup:
"""Insert an OptionGroup at a given position."""
group = self.add_option_group(*args, **kwargs)
self.option_groups.pop()
self.option_groups.insert(idx, group)
return group
@property
def option_list_all(self) -> List[optparse.Option]:
"""Get a list of all options, including those in option groups."""
res = self.option_list[:]
for i in self.option_groups:
res.extend(i.option_list)
return res
[docs]class ConfigOptionParser(CustomOptionParser):
"""Custom option parser which updates its defaults by checking the
configuration files and environmental variables"""
def __init__(
self,
*args: Any,
name: str,
isolated: bool = False,
**kwargs: Any,
) -> None:
self.name = name
self.config = Configuration(isolated)
assert self.name
super().__init__(*args, **kwargs)
[docs] def check_default(self, option: optparse.Option, key: str, val: Any) -> Any:
try:
return option.check_value(key, val)
except optparse.OptionValueError as exc:
print(f"An error occurred during configuration: {exc}")
sys.exit(3)
[docs] def _get_ordered_configuration_items(
self,
) -> Generator[Tuple[str, Any], None, None]:
# Configuration gives keys in an unordered manner. Order them.
override_order = ["global", self.name, ":env:"]
# Pool the options into different groups
section_items: Dict[str, List[Tuple[str, Any]]] = {
name: [] for name in override_order
}
for section_key, val in self.config.items():
# ignore empty values
if not val:
logger.debug(
"Ignoring configuration key '%s' as it's value is empty.",
section_key,
)
continue
section, key = section_key.split(".", 1)
if section in override_order:
section_items[section].append((key, val))
# Yield each group in their override order
for section in override_order:
for key, val in section_items[section]:
yield key, val
[docs] def _update_defaults(self, defaults: Dict[str, Any]) -> Dict[str, Any]:
"""Updates the given defaults with values from the config files and
the environ. Does a little special handling for certain types of
options (lists)."""
# Accumulate complex default state.
self.values = optparse.Values(self.defaults)
late_eval = set()
# Then set the options with those values
for key, val in self._get_ordered_configuration_items():
# '--' because configuration supports only long names
option = self.get_option("--" + key)
# Ignore options not present in this parser. E.g. non-globals put
# in [global] by users that want them to apply to all applicable
# commands.
if option is None:
continue
assert option.dest is not None
if option.action in ("store_true", "store_false"):
try:
val = strtobool(val)
except ValueError:
self.error(
"{} is not a valid value for {} option, " # noqa
"please specify a boolean value like yes/no, "
"true/false or 1/0 instead.".format(val, key)
)
elif option.action == "count":
with suppress(ValueError):
val = strtobool(val)
with suppress(ValueError):
val = int(val)
if not isinstance(val, int) or val < 0:
self.error(
"{} is not a valid value for {} option, " # noqa
"please instead specify either a non-negative integer "
"or a boolean value like yes/no or false/true "
"which is equivalent to 1/0.".format(val, key)
)
elif option.action == "append":
val = val.split()
val = [self.check_default(option, key, v) for v in val]
elif option.action == "callback":
assert option.callback is not None
late_eval.add(option.dest)
opt_str = option.get_opt_string()
val = option.convert_value(opt_str, val)
# From take_action
args = option.callback_args or ()
kwargs = option.callback_kwargs or {}
option.callback(option, opt_str, val, self, *args, **kwargs)
else:
val = self.check_default(option, key, val)
defaults[option.dest] = val
for key in late_eval:
defaults[key] = getattr(self.values, key)
self.values = None
return defaults
[docs] def get_default_values(self) -> optparse.Values:
"""Overriding to make updating the defaults after instantiation of
the option parser possible, _update_defaults() does the dirty work."""
if not self.process_default_values:
# Old, pre-Optik 1.5 behaviour.
return optparse.Values(self.defaults)
# Load the configuration, or error out in case of an error
try:
self.config.load()
except ConfigurationError as err:
self.exit(UNKNOWN_ERROR, str(err))
defaults = self._update_defaults(self.defaults.copy()) # ours
for option in self._get_all_options():
assert option.dest is not None
default = defaults.get(option.dest)
if isinstance(default, str):
opt_str = option.get_opt_string()
defaults[option.dest] = option.check_value(opt_str, default)
return optparse.Values(defaults)
[docs] def error(self, msg: str) -> None:
self.print_usage(sys.stderr)
self.exit(UNKNOWN_ERROR, f"{msg}\n")