965 lines
36 KiB
Python
965 lines
36 KiB
Python
"""Configuration file parser.
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A configuration file consists of sections, lead by a "[section]" header,
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and followed by "name: value" entries, with continuations and such in
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the style of RFC 822.
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The option values can contain format strings which refer to other values in
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the same section, or values in a special [DEFAULT] section.
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For example:
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something: %(dir)s/whatever
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would resolve the "%(dir)s" to the value of dir. All reference
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expansions are done late, on demand.
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Intrinsic defaults can be specified by passing them into the
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ConfigParser constructor as a dictionary.
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class:
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ConfigParser -- responsible for parsing a list of
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configuration files, and managing the parsed database.
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methods:
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__init__(defaults=None, dict_type=_default_dict,
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delimiters=('=', ':'), comment_prefixes=('#', ';'),
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strict=False, empty_lines_in_values=True, allow_no_value=False):
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Create the parser. When `defaults' is given, it is initialized into the
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dictionary or intrinsic defaults. The keys must be strings, the values
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must be appropriate for %()s string interpolation. Note that `__name__'
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is always an intrinsic default; its value is the section's name.
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When `dict_type' is given, it will be used to create the dictionary
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objects for the list of sections, for the options within a section, and
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for the default values.
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When `delimiters' is given, it will be used as the set of substrings
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that divide keys from values.
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When `comment_prefixes' is given, it will be used as the set of
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substrings that prefix comments in a line.
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When `strict` is True, the parser won't allow for any section or option
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duplicates while reading from a single source (file, string or
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dictionary). Default is False.
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When `empty_lines_in_values' is False (default: True), each empty line
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marks the end of an option. Otherwise, internal empty lines of
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a multiline option are kept as part of the value.
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When `allow_no_value' is True (default: False), options without
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values are accepted; the value presented for these is None.
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sections()
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Return all the configuration section names, sans DEFAULT.
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has_section(section)
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Return whether the given section exists.
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has_option(section, option)
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Return whether the given option exists in the given section.
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options(section)
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Return list of configuration options for the named section.
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read(filenames, encoding=None)
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Read and parse the list of named configuration files, given by
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name. A single filename is also allowed. Non-existing files
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are ignored. Return list of successfully read files.
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read_file(f, filename=None)
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Read and parse one configuration file, given as a file object.
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The filename defaults to f.name; it is only used in error
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messages (if f has no `name' attribute, the string `<???>' is used).
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read_string(string)
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Read configuration from a given string.
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read_dict(dictionary)
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Read configuration from a dictionary. Keys are section names,
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values are dictionaries with keys and values that should be present
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in the section. If the used dictionary type preserves order, sections
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and their keys will be added in order.
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get(section, option, raw=False, vars=None)
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Return a string value for the named option. All % interpolations are
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expanded in the return values, based on the defaults passed into the
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constructor and the DEFAULT section. Additional substitutions may be
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provided using the `vars' argument, which must be a dictionary whose
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contents override any pre-existing defaults.
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getint(section, options)
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Like get(), but convert value to an integer.
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getfloat(section, options)
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Like get(), but convert value to a float.
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getboolean(section, options)
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Like get(), but convert value to a boolean (currently case
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insensitively defined as 0, false, no, off for False, and 1, true,
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yes, on for True). Returns False or True.
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items(section, raw=False, vars=None)
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Return a list of tuples with (name, value) for each option
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in the section.
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remove_section(section)
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Remove the given file section and all its options.
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remove_option(section, option)
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Remove the given option from the given section.
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set(section, option, value)
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Set the given option.
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write(fp, space_around_delimiters=True)
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Write the configuration state in .ini format. If
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`space_around_delimiters' is True (the default), delimiters
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between keys and values are surrounded by spaces.
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"""
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try:
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from collections import OrderedDict as _default_dict
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except ImportError:
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# fallback for setup.py which hasn't yet built _collections
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_default_dict = dict
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import io
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import re
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import sys
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import warnings
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__all__ = ["NoSectionError", "DuplicateOptionError", "DuplicateSectionError",
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"NoOptionError", "InterpolationError", "InterpolationDepthError",
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"InterpolationSyntaxError", "ParsingError",
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"MissingSectionHeaderError",
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"ConfigParser", "SafeConfigParser", "RawConfigParser",
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"DEFAULTSECT", "MAX_INTERPOLATION_DEPTH"]
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DEFAULTSECT = "DEFAULT"
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MAX_INTERPOLATION_DEPTH = 10
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# exception classes
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class Error(Exception):
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"""Base class for ConfigParser exceptions."""
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def _get_message(self):
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"""Getter for 'message'; needed only to override deprecation in
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BaseException.
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"""
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return self.__message
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def _set_message(self, value):
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"""Setter for 'message'; needed only to override deprecation in
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BaseException.
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"""
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self.__message = value
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# BaseException.message has been deprecated since Python 2.6. To prevent
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# DeprecationWarning from popping up over this pre-existing attribute, use
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# a new property that takes lookup precedence.
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message = property(_get_message, _set_message)
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def __init__(self, msg=''):
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self.message = msg
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Exception.__init__(self, msg)
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def __repr__(self):
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return self.message
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__str__ = __repr__
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class NoSectionError(Error):
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"""Raised when no section matches a requested option."""
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def __init__(self, section):
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Error.__init__(self, 'No section: %r' % (section,))
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self.section = section
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self.args = (section, )
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class DuplicateSectionError(Error):
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"""Raised when a section is repeated in an input source.
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Possible repetitions that raise this exception are: multiple creation
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using the API or in strict parsers when a section is found more than once
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in a single input file, string or dictionary.
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"""
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def __init__(self, section, source=None, lineno=None):
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msg = [repr(section), " already exists"]
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if source is not None:
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message = ["While reading from ", source]
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if lineno is not None:
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message.append(" [line {0:2d}]".format(lineno))
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message.append(": section ")
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message.extend(msg)
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msg = message
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else:
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msg.insert(0, "Section ")
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Error.__init__(self, "".join(msg))
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self.section = section
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self.source = source
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self.lineno = lineno
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self.args = (section, source, lineno)
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class DuplicateOptionError(Error):
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"""Raised by strict parsers when an option is repeated in an input source.
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Current implementation raises this exception only when an option is found
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more than once in a single file, string or dictionary.
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"""
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def __init__(self, section, option, source=None, lineno=None):
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msg = [repr(option), " in section ", repr(section),
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" already exists"]
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if source is not None:
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message = ["While reading from ", source]
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if lineno is not None:
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message.append(" [line {0:2d}]".format(lineno))
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message.append(": option ")
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message.extend(msg)
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msg = message
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else:
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msg.insert(0, "Option ")
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Error.__init__(self, "".join(msg))
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self.section = section
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self.option = option
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self.source = source
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self.lineno = lineno
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self.args = (section, option, source, lineno)
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class NoOptionError(Error):
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"""A requested option was not found."""
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def __init__(self, option, section):
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Error.__init__(self, "No option %r in section: %r" %
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(option, section))
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self.option = option
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self.section = section
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self.args = (option, section)
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class InterpolationError(Error):
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"""Base class for interpolation-related exceptions."""
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def __init__(self, option, section, msg):
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Error.__init__(self, msg)
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self.option = option
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self.section = section
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self.args = (option, section, msg)
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class InterpolationMissingOptionError(InterpolationError):
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"""A string substitution required a setting which was not available."""
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def __init__(self, option, section, rawval, reference):
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msg = ("Bad value substitution:\n"
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"\tsection: [%s]\n"
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"\toption : %s\n"
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"\tkey : %s\n"
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"\trawval : %s\n"
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% (section, option, reference, rawval))
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InterpolationError.__init__(self, option, section, msg)
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self.reference = reference
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self.args = (option, section, rawval, reference)
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class InterpolationSyntaxError(InterpolationError):
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"""Raised when the source text contains invalid syntax.
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Current implementation raises this exception only for SafeConfigParser
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instances when the source text into which substitutions are made
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does not conform to the required syntax.
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"""
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class InterpolationDepthError(InterpolationError):
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"""Raised when substitutions are nested too deeply."""
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def __init__(self, option, section, rawval):
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msg = ("Value interpolation too deeply recursive:\n"
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"\tsection: [%s]\n"
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"\toption : %s\n"
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"\trawval : %s\n"
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% (section, option, rawval))
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InterpolationError.__init__(self, option, section, msg)
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self.args = (option, section, rawval)
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class ParsingError(Error):
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"""Raised when a configuration file does not follow legal syntax."""
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def __init__(self, source=None, filename=None):
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# Exactly one of `source'/`filename' arguments has to be given.
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# `filename' kept for compatibility.
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if filename and source:
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raise ValueError("Cannot specify both `filename' and `source'. "
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"Use `source'.")
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elif not filename and not source:
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raise ValueError("Required argument `source' not given.")
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elif filename:
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source = filename
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Error.__init__(self, 'Source contains parsing errors: %s' % source)
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self.source = source
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self.errors = []
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self.args = (source, )
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@property
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def filename(self):
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"""Deprecated, use `source'."""
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warnings.warn(
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"This 'filename' attribute will be removed in future versions. "
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"Use 'source' instead.",
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PendingDeprecationWarning, stacklevel=2
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)
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return self.source
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@filename.setter
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def filename(self, value):
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"""Deprecated, user `source'."""
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warnings.warn(
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"The 'filename' attribute will be removed in future versions. "
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"Use 'source' instead.",
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PendingDeprecationWarning, stacklevel=2
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)
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self.source = value
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def append(self, lineno, line):
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self.errors.append((lineno, line))
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self.message += '\n\t[line %2d]: %s' % (lineno, line)
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class MissingSectionHeaderError(ParsingError):
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"""Raised when a key-value pair is found before any section header."""
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def __init__(self, filename, lineno, line):
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Error.__init__(
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self,
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'File contains no section headers.\nfile: %s, line: %d\n%r' %
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(filename, lineno, line))
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self.source = filename
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self.lineno = lineno
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self.line = line
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self.args = (filename, lineno, line)
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class RawConfigParser:
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"""ConfigParser that does not do interpolation."""
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# Regular expressions for parsing section headers and options
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_SECT_TMPL = r"""
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\[ # [
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(?P<header>[^]]+) # very permissive!
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\] # ]
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"""
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_OPT_TMPL = r"""
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(?P<option>.*?) # very permissive!
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\s*(?P<vi>{delim})\s* # any number of space/tab,
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# followed by any of the
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# allowed delimiters,
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# followed by any space/tab
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(?P<value>.*)$ # everything up to eol
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"""
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_OPT_NV_TMPL = r"""
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(?P<option>.*?) # very permissive!
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\s*(?: # any number of space/tab,
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(?P<vi>{delim})\s* # optionally followed by
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# any of the allowed
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# delimiters, followed by any
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# space/tab
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(?P<value>.*))?$ # everything up to eol
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"""
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# Compiled regular expression for matching sections
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SECTCRE = re.compile(_SECT_TMPL, re.VERBOSE)
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# Compiled regular expression for matching options with typical separators
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OPTCRE = re.compile(_OPT_TMPL.format(delim="=|:"), re.VERBOSE)
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# Compiled regular expression for matching options with optional values
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# delimited using typical separators
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OPTCRE_NV = re.compile(_OPT_NV_TMPL.format(delim="=|:"), re.VERBOSE)
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# Compiled regular expression for matching leading whitespace in a line
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NONSPACECRE = re.compile(r"\S")
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# Select backwards-compatible inline comment character behavior
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# (; and # are comments at the start of a line, but ; only inline)
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_COMPATIBLE = object()
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def __init__(self, defaults=None, dict_type=_default_dict,
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allow_no_value=False, *, delimiters=('=', ':'),
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comment_prefixes=_COMPATIBLE, strict=False,
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empty_lines_in_values=True):
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self._dict = dict_type
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self._sections = self._dict()
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self._defaults = self._dict()
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if defaults:
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for key, value in defaults.items():
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self._defaults[self.optionxform(key)] = value
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self._delimiters = tuple(delimiters)
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if delimiters == ('=', ':'):
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self._optcre = self.OPTCRE_NV if allow_no_value else self.OPTCRE
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else:
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d = "|".join(re.escape(d) for d in delimiters)
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if allow_no_value:
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self._optcre = re.compile(self._OPT_NV_TMPL.format(delim=d),
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re.VERBOSE)
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else:
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self._optcre = re.compile(self._OPT_TMPL.format(delim=d),
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re.VERBOSE)
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if comment_prefixes is self._COMPATIBLE:
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self._startonly_comment_prefixes = ('#',)
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self._comment_prefixes = (';',)
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else:
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self._startonly_comment_prefixes = ()
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self._comment_prefixes = tuple(comment_prefixes or ())
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self._strict = strict
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self._empty_lines_in_values = empty_lines_in_values
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def defaults(self):
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return self._defaults
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def sections(self):
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"""Return a list of section names, excluding [DEFAULT]"""
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# self._sections will never have [DEFAULT] in it
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return list(self._sections.keys())
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def add_section(self, section):
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"""Create a new section in the configuration.
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Raise DuplicateSectionError if a section by the specified name
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already exists. Raise ValueError if name is DEFAULT or any of it's
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case-insensitive variants.
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"""
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if section.lower() == "default":
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raise ValueError('Invalid section name: %s' % section)
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|
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if section in self._sections:
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raise DuplicateSectionError(section)
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self._sections[section] = self._dict()
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def has_section(self, section):
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"""Indicate whether the named section is present in the configuration.
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The DEFAULT section is not acknowledged.
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"""
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return section in self._sections
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def options(self, section):
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"""Return a list of option names for the given section name."""
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try:
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opts = self._sections[section].copy()
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except KeyError:
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raise NoSectionError(section)
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opts.update(self._defaults)
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if '__name__' in opts:
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del opts['__name__']
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return list(opts.keys())
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|
|
|
def read(self, filenames, encoding=None):
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|
"""Read and parse a filename or a list of filenames.
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|
|
|
Files that cannot be opened are silently ignored; this is
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|
designed so that you can specify a list of potential
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configuration file locations (e.g. current directory, user's
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|
home directory, systemwide directory), and all existing
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configuration files in the list will be read. A single
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filename may also be given.
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|
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Return list of successfully read files.
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|
"""
|
|
if isinstance(filenames, str):
|
|
filenames = [filenames]
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|
read_ok = []
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|
for filename in filenames:
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try:
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fp = open(filename, encoding=encoding)
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|
except IOError:
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continue
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self._read(fp, filename)
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fp.close()
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read_ok.append(filename)
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return read_ok
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|
|
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def read_file(self, f, source=None):
|
|
"""Like read() but the argument must be a file-like object.
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|
|
|
The `f' argument must have a `readline' method. Optional second
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|
argument is the `source' specifying the name of the file being read. If
|
|
not given, it is taken from f.name. If `f' has no `name' attribute,
|
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`<???>' is used.
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|
"""
|
|
if source is None:
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try:
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srouce = f.name
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except AttributeError:
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source = '<???>'
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self._read(f, source)
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|
|
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def read_string(self, string, source='<string>'):
|
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"""Read configuration from a given string."""
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sfile = io.StringIO(string)
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self.read_file(sfile, source)
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|
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def read_dict(self, dictionary, source='<dict>'):
|
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"""Read configuration from a dictionary.
|
|
|
|
Keys are section names, values are dictionaries with keys and values
|
|
that should be present in the section. If the used dictionary type
|
|
preserves order, sections and their keys will be added in order.
|
|
|
|
Optional second argument is the `source' specifying the name of the
|
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dictionary being read.
|
|
"""
|
|
elements_added = set()
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|
for section, keys in dictionary.items():
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try:
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self.add_section(section)
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|
except DuplicateSectionError:
|
|
if self._strict and section in elements_added:
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raise
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|
elements_added.add(section)
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|
for key, value in keys.items():
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key = self.optionxform(key)
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|
if self._strict and (section, key) in elements_added:
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raise DuplicateOptionError(section, key, source)
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|
elements_added.add((section, key))
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self.set(section, key, value)
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|
|
|
def readfp(self, fp, filename=None):
|
|
"""Deprecated, use read_file instead."""
|
|
warnings.warn(
|
|
"This method will be removed in future versions. "
|
|
"Use 'parser.read_file()' instead.",
|
|
PendingDeprecationWarning, stacklevel=2
|
|
)
|
|
self.read_file(fp, source=filename)
|
|
|
|
def get(self, section, option):
|
|
opt = self.optionxform(option)
|
|
if section not in self._sections:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
if opt in self._defaults:
|
|
return self._defaults[opt]
|
|
else:
|
|
raise NoOptionError(option, section)
|
|
elif opt in self._sections[section]:
|
|
return self._sections[section][opt]
|
|
elif opt in self._defaults:
|
|
return self._defaults[opt]
|
|
else:
|
|
raise NoOptionError(option, section)
|
|
|
|
def items(self, section):
|
|
try:
|
|
d2 = self._sections[section]
|
|
except KeyError:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
d2 = self._dict()
|
|
d = self._defaults.copy()
|
|
d.update(d2)
|
|
if "__name__" in d:
|
|
del d["__name__"]
|
|
return d.items()
|
|
|
|
def _get(self, section, conv, option):
|
|
return conv(self.get(section, option))
|
|
|
|
def getint(self, section, option):
|
|
return self._get(section, int, option)
|
|
|
|
def getfloat(self, section, option):
|
|
return self._get(section, float, option)
|
|
|
|
_boolean_states = {'1': True, 'yes': True, 'true': True, 'on': True,
|
|
'0': False, 'no': False, 'false': False, 'off': False}
|
|
|
|
def getboolean(self, section, option):
|
|
v = self.get(section, option)
|
|
if v.lower() not in self._boolean_states:
|
|
raise ValueError('Not a boolean: %s' % v)
|
|
return self._boolean_states[v.lower()]
|
|
|
|
def optionxform(self, optionstr):
|
|
return optionstr.lower()
|
|
|
|
def has_option(self, section, option):
|
|
"""Check for the existence of a given option in a given section."""
|
|
if not section or section == DEFAULTSECT:
|
|
option = self.optionxform(option)
|
|
return option in self._defaults
|
|
elif section not in self._sections:
|
|
return False
|
|
else:
|
|
option = self.optionxform(option)
|
|
return (option in self._sections[section]
|
|
or option in self._defaults)
|
|
|
|
def set(self, section, option, value=None):
|
|
"""Set an option."""
|
|
if not section or section == DEFAULTSECT:
|
|
sectdict = self._defaults
|
|
else:
|
|
try:
|
|
sectdict = self._sections[section]
|
|
except KeyError:
|
|
raise NoSectionError(section)
|
|
sectdict[self.optionxform(option)] = value
|
|
|
|
def write(self, fp, space_around_delimiters=True):
|
|
"""Write an .ini-format representation of the configuration state.
|
|
|
|
If `space_around_delimiters' is True (the default), delimiters
|
|
between keys and values are surrounded by spaces.
|
|
"""
|
|
if space_around_delimiters:
|
|
d = " {} ".format(self._delimiters[0])
|
|
else:
|
|
d = self._delimiters[0]
|
|
if self._defaults:
|
|
self._write_section(fp, DEFAULTSECT, self._defaults.items(), d)
|
|
for section in self._sections:
|
|
self._write_section(fp, section,
|
|
self._sections[section].items(), d)
|
|
|
|
def _write_section(self, fp, section_name, section_items, delimiter):
|
|
"""Write a single section to the specified `fp'."""
|
|
fp.write("[{}]\n".format(section_name))
|
|
for key, value in section_items:
|
|
if key == "__name__":
|
|
continue
|
|
if value is not None:
|
|
value = delimiter + str(value).replace('\n', '\n\t')
|
|
else:
|
|
value = ""
|
|
fp.write("{}{}\n".format(key, value))
|
|
fp.write("\n")
|
|
|
|
def remove_option(self, section, option):
|
|
"""Remove an option."""
|
|
if not section or section == DEFAULTSECT:
|
|
sectdict = self._defaults
|
|
else:
|
|
try:
|
|
sectdict = self._sections[section]
|
|
except KeyError:
|
|
raise NoSectionError(section)
|
|
option = self.optionxform(option)
|
|
existed = option in sectdict
|
|
if existed:
|
|
del sectdict[option]
|
|
return existed
|
|
|
|
def remove_section(self, section):
|
|
"""Remove a file section."""
|
|
existed = section in self._sections
|
|
if existed:
|
|
del self._sections[section]
|
|
return existed
|
|
|
|
def _read(self, fp, fpname):
|
|
"""Parse a sectioned configuration file.
|
|
|
|
Each section in a configuration file contains a header, indicated by
|
|
a name in square brackets (`[]'), plus key/value options, indicated by
|
|
`name' and `value' delimited with a specific substring (`=' or `:' by
|
|
default).
|
|
|
|
Values can span multiple lines, as long as they are indented deeper
|
|
than the first line of the value. Depending on the parser's mode, blank
|
|
lines may be treated as parts of multiline values or ignored.
|
|
|
|
Configuration files may include comments, prefixed by specific
|
|
characters (`#' and `;' by default). Comments may appear on their own
|
|
in an otherwise empty line or may be entered in lines holding values or
|
|
section names.
|
|
"""
|
|
elements_added = set()
|
|
cursect = None # None, or a dictionary
|
|
sectname = None
|
|
optname = None
|
|
lineno = 0
|
|
indent_level = 0
|
|
e = None # None, or an exception
|
|
for lineno, line in enumerate(fp, start=1):
|
|
# strip full line comments
|
|
comment_start = None
|
|
for prefix in self._startonly_comment_prefixes:
|
|
if line.strip().startswith(prefix):
|
|
comment_start = 0
|
|
break
|
|
# strip inline comments
|
|
for prefix in self._comment_prefixes:
|
|
index = line.find(prefix)
|
|
if index == 0 or (index > 0 and line[index-1].isspace()):
|
|
comment_start = index
|
|
break
|
|
value = line[:comment_start].strip()
|
|
if not value:
|
|
if self._empty_lines_in_values:
|
|
# add empty line to the value, but only if there was no
|
|
# comment on the line
|
|
if (comment_start is None and
|
|
cursect is not None and
|
|
optname and
|
|
cursect[optname] is not None):
|
|
cursect[optname].append('') # newlines added at join
|
|
else:
|
|
# empty line marks end of value
|
|
indent_level = sys.maxsize
|
|
continue
|
|
# continuation line?
|
|
first_nonspace = self.NONSPACECRE.search(line)
|
|
cur_indent_level = first_nonspace.start() if first_nonspace else 0
|
|
if (cursect is not None and optname and
|
|
cur_indent_level > indent_level):
|
|
cursect[optname].append(value)
|
|
# a section header or option header?
|
|
else:
|
|
indent_level = cur_indent_level
|
|
# is it a section header?
|
|
mo = self.SECTCRE.match(value)
|
|
if mo:
|
|
sectname = mo.group('header')
|
|
if sectname in self._sections:
|
|
if self._strict and sectname in elements_added:
|
|
raise DuplicateSectionError(sectname, fpname,
|
|
lineno)
|
|
cursect = self._sections[sectname]
|
|
elements_added.add(sectname)
|
|
elif sectname == DEFAULTSECT:
|
|
cursect = self._defaults
|
|
else:
|
|
cursect = self._dict()
|
|
cursect['__name__'] = sectname
|
|
self._sections[sectname] = cursect
|
|
elements_added.add(sectname)
|
|
# So sections can't start with a continuation line
|
|
optname = None
|
|
# no section header in the file?
|
|
elif cursect is None:
|
|
raise MissingSectionHeaderError(fpname, lineno, line)
|
|
# an option line?
|
|
else:
|
|
mo = self._optcre.match(value)
|
|
if mo:
|
|
optname, vi, optval = mo.group('option', 'vi', 'value')
|
|
if not optname:
|
|
e = self._handle_error(e, fpname, lineno, line)
|
|
optname = self.optionxform(optname.rstrip())
|
|
if (self._strict and
|
|
(sectname, optname) in elements_added):
|
|
raise DuplicateOptionError(sectname, optname,
|
|
fpname, lineno)
|
|
elements_added.add((sectname, optname))
|
|
# This check is fine because the OPTCRE cannot
|
|
# match if it would set optval to None
|
|
if optval is not None:
|
|
optval = optval.strip()
|
|
# allow empty values
|
|
if optval == '""':
|
|
optval = ''
|
|
cursect[optname] = [optval]
|
|
else:
|
|
# valueless option handling
|
|
cursect[optname] = optval
|
|
else:
|
|
# a non-fatal parsing error occurred. set up the
|
|
# exception but keep going. the exception will be
|
|
# raised at the end of the file and will contain a
|
|
# list of all bogus lines
|
|
e = self._handle_error(e, fpname, lineno, line)
|
|
# if any parsing errors occurred, raise an exception
|
|
if e:
|
|
raise e
|
|
self._join_multiline_values()
|
|
|
|
def _join_multiline_values(self):
|
|
all_sections = [self._defaults]
|
|
all_sections.extend(self._sections.values())
|
|
for options in all_sections:
|
|
for name, val in options.items():
|
|
if isinstance(val, list):
|
|
options[name] = '\n'.join(val).rstrip()
|
|
|
|
def _handle_error(self, exc, fpname, lineno, line):
|
|
if not exc:
|
|
exc = ParsingError(fpname)
|
|
exc.append(lineno, repr(line))
|
|
return exc
|
|
|
|
|
|
class ConfigParser(RawConfigParser):
|
|
"""ConfigParser implementing interpolation."""
|
|
|
|
def get(self, section, option, raw=False, vars=None):
|
|
"""Get an option value for a given section.
|
|
|
|
If `vars' is provided, it must be a dictionary. The option is looked up
|
|
in `vars' (if provided), `section', and in `defaults' in that order.
|
|
|
|
All % interpolations are expanded in the return values, unless the
|
|
optional argument `raw' is true. Values for interpolation keys are
|
|
looked up in the same manner as the option.
|
|
|
|
The section DEFAULT is special.
|
|
"""
|
|
d = self._defaults.copy()
|
|
try:
|
|
d.update(self._sections[section])
|
|
except KeyError:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
# Update with the entry specific variables
|
|
if vars:
|
|
for key, value in vars.items():
|
|
d[self.optionxform(key)] = value
|
|
option = self.optionxform(option)
|
|
try:
|
|
value = d[option]
|
|
except KeyError:
|
|
raise NoOptionError(option, section)
|
|
|
|
if raw or value is None:
|
|
return value
|
|
else:
|
|
return self._interpolate(section, option, value, d)
|
|
|
|
def items(self, section, raw=False, vars=None):
|
|
"""Return a list of (name, value) tuples for each option in a section.
|
|
|
|
All % interpolations are expanded in the return values, based on the
|
|
defaults passed into the constructor, unless the optional argument
|
|
`raw' is true. Additional substitutions may be provided using the
|
|
`vars' argument, which must be a dictionary whose contents overrides
|
|
any pre-existing defaults.
|
|
|
|
The section DEFAULT is special.
|
|
"""
|
|
d = self._defaults.copy()
|
|
try:
|
|
d.update(self._sections[section])
|
|
except KeyError:
|
|
if section != DEFAULTSECT:
|
|
raise NoSectionError(section)
|
|
# Update with the entry specific variables
|
|
if vars:
|
|
for key, value in vars.items():
|
|
d[self.optionxform(key)] = value
|
|
options = list(d.keys())
|
|
if "__name__" in options:
|
|
options.remove("__name__")
|
|
if raw:
|
|
return [(option, d[option])
|
|
for option in options]
|
|
else:
|
|
return [(option, self._interpolate(section, option, d[option], d))
|
|
for option in options]
|
|
|
|
def _interpolate(self, section, option, rawval, vars):
|
|
# do the string interpolation
|
|
value = rawval
|
|
depth = MAX_INTERPOLATION_DEPTH
|
|
while depth: # Loop through this until it's done
|
|
depth -= 1
|
|
if value and "%(" in value:
|
|
value = self._KEYCRE.sub(self._interpolation_replace, value)
|
|
try:
|
|
value = value % vars
|
|
except KeyError as e:
|
|
raise InterpolationMissingOptionError(
|
|
option, section, rawval, e.args[0])
|
|
else:
|
|
break
|
|
if value and "%(" in value:
|
|
raise InterpolationDepthError(option, section, rawval)
|
|
return value
|
|
|
|
_KEYCRE = re.compile(r"%\(([^)]*)\)s|.")
|
|
|
|
def _interpolation_replace(self, match):
|
|
s = match.group(1)
|
|
if s is None:
|
|
return match.group()
|
|
else:
|
|
return "%%(%s)s" % self.optionxform(s)
|
|
|
|
|
|
class SafeConfigParser(ConfigParser):
|
|
"""ConfigParser implementing sane interpolation."""
|
|
|
|
def _interpolate(self, section, option, rawval, vars):
|
|
# do the string interpolation
|
|
L = []
|
|
self._interpolate_some(option, L, rawval, section, vars, 1)
|
|
return ''.join(L)
|
|
|
|
_interpvar_re = re.compile(r"%\(([^)]+)\)s")
|
|
|
|
def _interpolate_some(self, option, accum, rest, section, map, depth):
|
|
if depth > MAX_INTERPOLATION_DEPTH:
|
|
raise InterpolationDepthError(option, section, rest)
|
|
while rest:
|
|
p = rest.find("%")
|
|
if p < 0:
|
|
accum.append(rest)
|
|
return
|
|
if p > 0:
|
|
accum.append(rest[:p])
|
|
rest = rest[p:]
|
|
# p is no longer used
|
|
c = rest[1:2]
|
|
if c == "%":
|
|
accum.append("%")
|
|
rest = rest[2:]
|
|
elif c == "(":
|
|
m = self._interpvar_re.match(rest)
|
|
if m is None:
|
|
raise InterpolationSyntaxError(option, section,
|
|
"bad interpolation variable reference %r" % rest)
|
|
var = self.optionxform(m.group(1))
|
|
rest = rest[m.end():]
|
|
try:
|
|
v = map[var]
|
|
except KeyError:
|
|
raise InterpolationMissingOptionError(
|
|
option, section, rest, var)
|
|
if "%" in v:
|
|
self._interpolate_some(option, accum, v,
|
|
section, map, depth + 1)
|
|
else:
|
|
accum.append(v)
|
|
else:
|
|
raise InterpolationSyntaxError(
|
|
option, section,
|
|
"'%%' must be followed by '%%' or '(', "
|
|
"found: %r" % (rest,))
|
|
|
|
def set(self, section, option, value=None):
|
|
"""Set an option. Extend ConfigParser.set: check for string values."""
|
|
# The only legal non-string value if we allow valueless
|
|
# options is None, so we need to check if the value is a
|
|
# string if:
|
|
# - we do not allow valueless options, or
|
|
# - we allow valueless options but the value is not None
|
|
if self._optcre is self.OPTCRE or value:
|
|
if not isinstance(value, str):
|
|
raise TypeError("option values must be strings")
|
|
# check for bad percent signs
|
|
if value:
|
|
tmp_value = value.replace('%%', '') # escaped percent signs
|
|
tmp_value = self._interpvar_re.sub('', tmp_value) # valid syntax
|
|
if '%' in tmp_value:
|
|
raise ValueError("invalid interpolation syntax in %r at "
|
|
"position %d" % (value, tmp_value.find('%')))
|
|
ConfigParser.set(self, section, option, value)
|