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Edit File : baseparser.py \| Size : 7.97 KB
"""Base option parser setup""" import sys import optparse import os import textwrap from distutils.util import strtobool from pip.backwardcompat import ConfigParser, string_types from pip.locations import default_config_file from pip.util import get_terminal_size, get_prog from pip._vendor import pkg_resources 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 inital 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 that 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.config = ConfigParser.RawConfigParser() self.name = kwargs.pop('name') self.files = self.get_config_files() if self.files: self.config.read(self.files) assert self.name optparse.OptionParser.__init__(self, args, **kwargs) def get_config_files(self): config_file = os.environ.get('PIP_CONFIG_FILE', False) if config_file == os.devnull: return [] if config_file and os.path.exists(config_file): return [config_file] return [default_config_file] def check_default(self, option, key, val): try: return option.check_value(key, val) except optparse.OptionValueError: e = sys.exc_info()[1] print("An error occurred during configuration: %s" % e) sys.exit(3) 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).""" # Then go and look for the other sources of configuration: config = {} # 1. config files for section in ('global', self.name): config.update(self.normalize_keys(self.get_config_section(section))) # 2. environmental variables config.update(self.normalize_keys(self.get_environ_vars())) # Then set the options with those values for key, val in config.items(): option = self.get_option(key) if option is not None: # ignore empty values if not val: continue if option.action in ('store_true', 'store_false', 'count'): val = strtobool(val) if option.action == 'append': val = val.split() val = [self.check_default(option, key, v) for v in val] else: val = self.check_default(option, key, val) defaults[option.dest] = val return defaults def normalize_keys(self, items): """Return a config dictionary with normalized keys regardless of whether the keys were specified in environment variables or in config files""" normalized = {} for key, val in items: key = key.replace('_', '-') if not key.startswith('--'): key = '--%s' % key # only prefer long opts normalized[key] = val return normalized def get_config_section(self, name): """Get a section of a configuration""" if self.config.has_section(name): return self.config.items(name) return [] def get_environ_vars(self, prefix='PIP_'): """Returns a generator with all environmental vars with prefix PIP_""" for key, val in os.environ.items(): if key.startswith(prefix): yield (key.replace(prefix, '').lower(), val) def get_default_values(self): """Overridding 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) 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(2, "%s\n" % msg) Back

Edit File : baseparser.py | Size : 7.97 KB

"""Base option parser setup"""

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

from pip.backwardcompat import ConfigParser, string_types
from pip.locations import default_config_file
from pip.util import get_terminal_size, get_prog
from pip._vendor import pkg_resources

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 inital 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 that 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.config = ConfigParser.RawConfigParser()
        self.name = kwargs.pop('name')
        self.files = self.get_config_files()
        if self.files:
            self.config.read(self.files)
        assert self.name
        optparse.OptionParser.__init__(self, *args, **kwargs)

def get_config_files(self):
        config_file = os.environ.get('PIP_CONFIG_FILE', False)
        if config_file == os.devnull:
            return []
        if config_file and os.path.exists(config_file):
            return [config_file]
        return [default_config_file]

def check_default(self, option, key, val):
        try:
            return option.check_value(key, val)
        except optparse.OptionValueError:
            e = sys.exc_info()[1]
            print("An error occurred during configuration: %s" % e)
            sys.exit(3)

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)."""
        # Then go and look for the other sources of configuration:
        config = {}
        # 1. config files
        for section in ('global', self.name):
            config.update(self.normalize_keys(self.get_config_section(section)))
        # 2. environmental variables
        config.update(self.normalize_keys(self.get_environ_vars()))
        # Then set the options with those values
        for key, val in config.items():
            option = self.get_option(key)
            if option is not None:
                # ignore empty values
                if not val:
                    continue
                if option.action in ('store_true', 'store_false', 'count'):
                    val = strtobool(val)
                if option.action == 'append':
                    val = val.split()
                    val = [self.check_default(option, key, v) for v in val]
                else:
                    val = self.check_default(option, key, val)

defaults[option.dest] = val
        return defaults

def normalize_keys(self, items):
        """Return a config dictionary with normalized keys regardless of
        whether the keys were specified in environment variables or in config
        files"""
        normalized = {}
        for key, val in items:
            key = key.replace('_', '-')
            if not key.startswith('--'):
                key = '--%s' % key  # only prefer long opts
            normalized[key] = val
        return normalized

def get_config_section(self, name):
        """Get a section of a configuration"""
        if self.config.has_section(name):
            return self.config.items(name)
        return []

def get_environ_vars(self, prefix='PIP_'):
        """Returns a generator with all environmental vars with prefix PIP_"""
        for key, val in os.environ.items():
            if key.startswith(prefix):
                yield (key.replace(prefix, '').lower(), val)

def get_default_values(self):
        """Overridding 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)

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(2, "%s\n" % msg)

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