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Edit File : parser.py \| Size : 9.26 KB
"""Base option parser setup""" # The following comment should be removed at some point in the future. # mypy: disallow-untyped-defs=False from __future__ import absolute_import import logging import optparse import sys import textwrap from distutils.util import strtobool from pip._vendor.six import string_types from pip._internal.cli.status_codes import UNKNOWN_ERROR from pip._internal.configuration import Configuration, ConfigurationError from pip._internal.utils.compat import get_terminal_size logger = logging.getLogger(__name__) class PrettyHelpFormatter(optparse.IndentedHelpFormatter): """A prettier/less verbose help formatter for optparse.""" def __init__(self, args, kwargs): # help position must be aligned with __init__.parseopts.description kwargs['max_help_position'] = 30 kwargs['indent_increment'] = 1 kwargs['width'] = get_terminal_size()[0] - 2 optparse.IndentedHelpFormatter.__init__(self, args, *kwargs) def format_option_strings(self, option): return self._format_option_strings(option, ' <%s>', ', ') def _format_option_strings(self, option, mvarfmt=' <%s>', optsep=', '): """ 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 - evaluated as mvarfmt % metavar :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(): metavar = option.metavar or option.dest.lower() opts.append(mvarfmt % metavar.lower()) return ''.join(opts) def format_heading(self, heading): if heading == 'Options': return '' return heading + ':\n' def format_usage(self, usage): """ Ensure there is only one newline between usage and the first heading if there is no description. """ msg = '\nUsage: %s\n' % self.indent_lines(textwrap.dedent(usage), " ") return msg def format_description(self, description): # 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 = '%s:\n%s\n' % (label, description) return description else: return '' def format_epilog(self, epilog): # leave full control over epilog to us if epilog: return epilog else: return '' def indent_lines(self, text, indent): 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. """ def expand_default(self, option): if self.parser is not None: self.parser._update_defaults(self.parser.defaults) return optparse.IndentedHelpFormatter.expand_default(self, option) class CustomOptionParser(optparse.OptionParser): def insert_option_group(self, idx, args, *kwargs): """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): """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 class ConfigOptionParser(CustomOptionParser): """Custom option parser which updates its defaults by checking the configuration files and environmental variables""" def __init__(self, args, *kwargs): self.name = kwargs.pop('name') isolated = kwargs.pop("isolated", False) self.config = Configuration(isolated) assert self.name optparse.OptionParser.__init__(self, args, *kwargs) def check_default(self, option, key, val): try: return option.check_value(key, val) except optparse.OptionValueError as exc: print("An error occurred during configuration: %s" % exc) sys.exit(3) def _get_ordered_configuration_items(self): # Configuration gives keys in an unordered manner. Order them. override_order = ["global", self.name, ":env:"] # Pool the options into different groups section_items = {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 def _update_defaults(self, defaults): """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 if option.action in ('store_true', 'store_false', 'count'): try: val = strtobool(val) except ValueError: error_msg = invalid_config_error_message( option.action, key, val ) self.error(error_msg) elif option.action == 'append': val = val.split() val = [self.check_default(option, key, v) for v in val] elif option.action == 'callback': 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 def get_default_values(self): """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(): default = defaults.get(option.dest) if isinstance(default, string_types): opt_str = option.get_opt_string() defaults[option.dest] = option.check_value(opt_str, default) return optparse.Values(defaults) def error(self, msg): self.print_usage(sys.stderr) self.exit(UNKNOWN_ERROR, "%s\n" % msg) def invalid_config_error_message(action, key, val): """Returns a better error message when invalid configuration option is provided.""" if action in ('store_true', 'store_false'): return ("{0} is not a valid value for {1} option, " "please specify a boolean value like yes/no, " "true/false or 1/0 instead.").format(val, key) return ("{0} is not a valid value for {1} option, " "please specify a numerical value like 1/0 " "instead.").format(val, key) Back

Edit File : parser.py | Size : 9.26 KB

"""Base option parser setup"""

# The following comment should be removed at some point in the future.
# mypy: disallow-untyped-defs=False

from __future__ import absolute_import

import logging
import optparse
import sys
import textwrap
from distutils.util import strtobool

from pip._vendor.six import string_types

from pip._internal.cli.status_codes import UNKNOWN_ERROR
from pip._internal.configuration import Configuration, ConfigurationError
from pip._internal.utils.compat import get_terminal_size

logger = logging.getLogger(__name__)

class PrettyHelpFormatter(optparse.IndentedHelpFormatter):
    """A prettier/less verbose help formatter for optparse."""

def __init__(self, *args, **kwargs):
        # help position must be aligned with __init__.parseopts.description
        kwargs['max_help_position'] = 30
        kwargs['indent_increment'] = 1
        kwargs['width'] = get_terminal_size()[0] - 2
        optparse.IndentedHelpFormatter.__init__(self, *args, **kwargs)

def format_option_strings(self, option):
        return self._format_option_strings(option, ' <%s>', ', ')

def _format_option_strings(self, option, mvarfmt=' <%s>', optsep=', '):
        """
        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 - evaluated as mvarfmt % metavar
        :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():
            metavar = option.metavar or option.dest.lower()
            opts.append(mvarfmt % metavar.lower())

return ''.join(opts)

def format_heading(self, heading):
        if heading == 'Options':
            return ''
        return heading + ':\n'

def format_usage(self, usage):
        """
        Ensure there is only one newline between usage and the first heading
        if there is no description.
        """
        msg = '\nUsage: %s\n' % self.indent_lines(textwrap.dedent(usage), "  ")
        return msg

def format_description(self, description):
        # 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 = '%s:\n%s\n' % (label, description)
            return description
        else:
            return ''

def format_epilog(self, epilog):
        # leave full control over epilog to us
        if epilog:
            return epilog
        else:
            return ''

def indent_lines(self, text, indent):
        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.
    """

def expand_default(self, option):
        if self.parser is not None:
            self.parser._update_defaults(self.parser.defaults)
        return optparse.IndentedHelpFormatter.expand_default(self, option)

class CustomOptionParser(optparse.OptionParser):

def insert_option_group(self, idx, *args, **kwargs):
        """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):
        """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

class ConfigOptionParser(CustomOptionParser):
    """Custom option parser which updates its defaults by checking the
    configuration files and environmental variables"""

def __init__(self, *args, **kwargs):
        self.name = kwargs.pop('name')

isolated = kwargs.pop("isolated", False)
        self.config = Configuration(isolated)

assert self.name
        optparse.OptionParser.__init__(self, *args, **kwargs)

def check_default(self, option, key, val):
        try:
            return option.check_value(key, val)
        except optparse.OptionValueError as exc:
            print("An error occurred during configuration: %s" % exc)
            sys.exit(3)

def _get_ordered_configuration_items(self):
        # Configuration gives keys in an unordered manner. Order them.
        override_order = ["global", self.name, ":env:"]

# Pool the options into different groups
        section_items = {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

def _update_defaults(self, defaults):
        """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

if option.action in ('store_true', 'store_false', 'count'):
                try:
                    val = strtobool(val)
                except ValueError:
                    error_msg = invalid_config_error_message(
                        option.action, key, val
                    )
                    self.error(error_msg)

elif option.action == 'append':
                val = val.split()
                val = [self.check_default(option, key, v) for v in val]
            elif option.action == 'callback':
                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

def get_default_values(self):
        """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():
            default = defaults.get(option.dest)
            if isinstance(default, string_types):
                opt_str = option.get_opt_string()
                defaults[option.dest] = option.check_value(opt_str, default)
        return optparse.Values(defaults)

def error(self, msg):
        self.print_usage(sys.stderr)
        self.exit(UNKNOWN_ERROR, "%s\n" % msg)

def invalid_config_error_message(action, key, val):
    """Returns a better error message when invalid configuration option
    is provided."""
    if action in ('store_true', 'store_false'):
        return ("{0} is not a valid value for {1} option, "
                "please specify a boolean value like yes/no, "
                "true/false or 1/0 instead.").format(val, key)

return ("{0} is not a valid value for {1} option, "
            "please specify a numerical value like 1/0 "
            "instead.").format(val, key)

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