/usr/share/pyshared/ZConfig/cmdline.py is in python-zconfig 2.9.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
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#
# Copyright (c) 2003 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
"""Support for command-line provision of settings.
This module provides an extension of the ConfigLoader class which adds
a way to add configuration settings from an alternate source. Each
setting is described by a string of the form::
some/path/to/key=value
"""
import ZConfig
import ZConfig.loader
import ZConfig.matcher
class ExtendedConfigLoader(ZConfig.loader.ConfigLoader):
def __init__(self, schema):
ZConfig.loader.ConfigLoader.__init__(self, schema)
self.clopts = [] # [(optpath, value, source-position), ...]
def addOption(self, spec, pos=None):
if pos is None:
pos = "<command-line option>", -1, -1
if "=" not in spec:
e = ZConfig.ConfigurationSyntaxError(
"invalid configuration specifier", *pos)
e.specifier = spec
raise e
# For now, just add it to the list; not clear that checking
# against the schema at this point buys anything.
opt, val = spec.split("=", 1)
optpath = opt.split("/")
if "" in optpath:
# // is not allowed in option path
e = ZConfig.ConfigurationSyntaxError(
"'//' is not allowed in an option path", *pos)
e.specifier = spec
raise e
self.clopts.append((optpath, val, pos))
def createSchemaMatcher(self):
if self.clopts:
sm = ExtendedSchemaMatcher(self.schema)
sm.set_optionbag(self.cook())
else:
sm = ZConfig.loader.ConfigLoader.createSchemaMatcher(self)
return sm
def cook(self):
if self.clopts:
return OptionBag(self.schema, self.schema, self.clopts)
else:
return None
class OptionBag:
def __init__(self, schema, sectiontype, options):
self.sectiontype = sectiontype
self.schema = schema
self.keypairs = {}
self.sectitems = []
self._basic_key = schema.registry.get("basic-key")
for item in options:
optpath, val, pos = item
name = sectiontype.keytype(optpath[0])
if len(optpath) == 1:
self.add_value(name, val, pos)
else:
self.sectitems.append(item)
def basic_key(self, s, pos):
try:
return self._basic_key(s)
except ValueError:
raise ZConfig.ConfigurationSyntaxError(
"could not convert basic-key value", *pos)
def add_value(self, name, val, pos):
if self.keypairs.has_key(name):
L = self.keypairs[name]
else:
L = []
self.keypairs[name] = L
L.append((val, pos))
def has_key(self, name):
return self.keypairs.has_key(name)
def get_key(self, name):
"""Return a list of (value, pos) items for the key 'name'.
The returned list may be empty.
"""
L = self.keypairs.get(name)
if L:
del self.keypairs[name]
return L
else:
return []
def keys(self):
return self.keypairs.keys()
def get_section_info(self, type, name):
L = [] # what pertains to the child section
R = [] # what we keep
for item in self.sectitems:
optpath, val, pos = item
s = optpath[0]
bk = self.basic_key(s, pos)
if name and self._normalize_case(s) == name:
L.append((optpath[1:], val, pos))
elif bk == type:
L.append((optpath[1:], val, pos))
else:
R.append(item)
if L:
self.sectitems[:] = R
return OptionBag(self.schema, self.schema.gettype(type), L)
else:
return None
def finish(self):
if self.sectitems or self.keypairs:
raise ZConfig.ConfigurationError(
"not all command line options were consumed")
def _normalize_case(self, string):
return string.lower()
class MatcherMixin:
def set_optionbag(self, bag):
self.optionbag = bag
def addValue(self, key, value, position):
try:
realkey = self.type.keytype(key)
except ValueError, e:
raise ZConfig.DataConversionError(e, key, position)
if self.optionbag.has_key(realkey):
return
ZConfig.matcher.BaseMatcher.addValue(self, key, value, position)
def createChildMatcher(self, type, name):
sm = ZConfig.matcher.BaseMatcher.createChildMatcher(self, type, name)
bag = self.optionbag.get_section_info(type.name, name)
if bag is not None:
sm = ExtendedSectionMatcher(
sm.info, sm.type, sm.name, sm.handlers)
sm.set_optionbag(bag)
return sm
def finish_optionbag(self):
for key in self.optionbag.keys():
for val, pos in self.optionbag.get_key(key):
ZConfig.matcher.BaseMatcher.addValue(self, key, val, pos)
self.optionbag.finish()
class ExtendedSectionMatcher(MatcherMixin, ZConfig.matcher.SectionMatcher):
def finish(self):
self.finish_optionbag()
return ZConfig.matcher.SectionMatcher.finish(self)
class ExtendedSchemaMatcher(MatcherMixin, ZConfig.matcher.SchemaMatcher):
def finish(self):
self.finish_optionbag()
return ZConfig.matcher.SchemaMatcher.finish(self)
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