Limnoria/src/registry.py
2004-07-28 02:56:44 +00:00

513 lines
16 KiB
Python

#!/usr/bin/env python
###
# Copyright (c) 2004, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
__revision__ = "$Id$"
import re
import copy
import sets
import time
import types
import textwrap
import supybot.fix as fix
import supybot.utils as utils
class RegistryException(Exception):
pass
class InvalidRegistryFile(RegistryException):
pass
class InvalidRegistryName(RegistryException):
pass
class InvalidRegistryValue(RegistryException):
pass
class NonExistentRegistryEntry(RegistryException):
pass
_cache = utils.InsensitivePreservingDict()
_lastModified = 0
def open(filename, clear=False):
"""Initializes the module by loading the registry file into memory."""
global _lastModified
if clear:
_cache.clear()
_fd = file(filename)
fd = utils.nonCommentNonEmptyLines(_fd)
for (i, line) in enumerate(fd):
line = line.rstrip('\r\n')
try:
(key, value) = re.split(r':\s*', line, 1)
except ValueError:
raise InvalidRegistryFile, 'Error unpacking line #%s' % (i+1)
_cache[key] = value
_lastModified = time.time()
_fd.close()
def close(registry, filename, annotated=True, helpOnceOnly=False):
first = True
helpCache = sets.Set()
fd = file(filename, 'w')
for (name, value) in registry.getValues(getChildren=True):
if annotated and hasattr(value,'help') and value.help:
if not helpOnceOnly or value.help not in self.helpCache:
helpCache.add(value.help)
lines = textwrap.wrap(value.help)
for (i, line) in enumerate(lines):
lines[i] = '# %s\n' % line
lines.insert(0, '###\n')
if first:
first = False
else:
lines.insert(0, '\n')
if hasattr(value, 'value'):
if value.showDefault:
lines.append('#\n')
try:
original = value.value
value.value = value.default
lines.append('# Default value: %s\n' % value)
finally:
value.value = original
lines.append('###\n')
fd.writelines(lines)
if hasattr(value, 'value'): # This lets us print help for non-valued.
fd.write('%s: %s\n' % (name, value))
fd.close()
def isValidRegistryName(name):
return '.' not in name and ':' not in name and len(name.split()) == 1
def split(name):
# XXX: This should eventually handle escapes.
return name.split('.')
def join(names):
return '.'.join(names)
class Group(object):
def __init__(self, supplyDefault=False):
self.name = 'unset'
self.added = []
self.children = utils.InsensitivePreservingDict()
self._lastModified = 0
self.supplyDefault = supplyDefault
OriginalClass = self.__class__
class X(OriginalClass):
"""This class exists to differentiate those values that have
been changed from their default from those that haven't."""
def set(self, *args):
self.__class__ = OriginalClass
self.set(*args)
def setValue(self, *args):
self.__class__ = OriginalClass
self.setValue(*args)
self.X = X
def __call__(self):
raise ValueError, 'Groups have no value.'
def __nonExistentEntry(self, attr):
s = '%s is not a valid entry in %s' % (attr, self.name)
raise NonExistentRegistryEntry, s
def __makeChild(self, attr, s):
v = self.__class__(self.default, self.help)
v.set(s)
v.__class__ = self.X
v.supplyDefault = False
v.help = '' # Clear this so it doesn't print a bazillion times.
self.register(attr, v)
return v
def __getattr__(self, attr):
if attr in self.children:
return self.children[attr]
elif self.supplyDefault:
return self.__makeChild(attr, str(self))
else:
self.__nonExistentEntry(attr)
def get(self, attr):
# Not getattr(self, attr) because some nodes might have groups that
# are named the same as their methods.
return self.__getattr__(attr)
def setName(self, name):
self.name = name
if name in _cache and self._lastModified < _lastModified:
self.set(_cache[name])
if self.supplyDefault:
for (k, v) in _cache.iteritems():
if k.startswith(self.name):
group = split(k)[-1]
try:
self.__makeChild(group, v)
except InvalidRegistryValue:
# It's probably supposed to be registered later.
pass
def register(self, name, node=None):
if not isValidRegistryName(name):
raise InvalidRegistryName, name
if node is None:
node = Group()
if name not in self.children: # XXX Is this right?
self.children[name] = node
self.added.append(name)
fullname = join([self.name, name])
node.setName(fullname)
return node
def unregister(self, name):
try:
node = self.children[name]
del self.children[name]
self.added.remove(name)
return node
except KeyError:
self.__nonExistentEntry(name)
def rename(self, old, new):
node = self.unregister(old)
self.register(new, node)
def getValues(self, getChildren=False, fullNames=True):
L = []
for name in self.added:
node = self.children[name]
if hasattr(node, 'value') or hasattr(node, 'help'):
if node.__class__ is not self.X:
L.append((node.name, node))
if getChildren:
L.extend(node.getValues(getChildren, fullNames))
if not fullNames:
L = [(split(s)[-1], node) for (s, node) in L]
return L
class Value(Group):
"""Invalid registry value. If you're getting this message, report it,
because we forgot to put a proper help string here."""
def __init__(self, default, help,
private=False, showDefault=True, **kwargs):
Group.__init__(self, **kwargs)
self.default = default
self.private = private
self.showDefault = showDefault
self.help = utils.normalizeWhitespace(help.strip())
self.setValue(default)
def error(self):
if self.__doc__:
s = self.__doc__
else:
s = """Invalid registry value. If you're getting this message,
report it, because we forgot to put a proper help string here."""
raise InvalidRegistryValue, utils.normalizeWhitespace(s)
def setName(self, *args):
if self.name == 'unset':
self._lastModified = 0
Group.setName(self, *args)
self._lastModified = time.time()
def set(self, s):
"""Override this with a function to convert a string to whatever type
you want, and call self.setValue to set the value."""
raise NotImplementedError
def setValue(self, v):
"""Check conditions on the actual value type here. I.e., if you're a
IntegerLessThanOneHundred (all your values must be integers less than
100) convert to an integer in set() and check that the integer is less
than 100 in this method. You *must* call this parent method in your
own setValue."""
self._lastModified = time.time()
self.value = v
if self.supplyDefault:
for (name, v) in self.children.items():
if v.__class__ is self.X:
self.unregister(name)
def __str__(self):
return repr(self())
# This is simply prettier than naming this function get(self)
def __call__(self):
if _lastModified > self._lastModified:
if self.name in _cache:
self.set(_cache[self.name])
return self.value
class Boolean(Value):
"""Value must be either True or False (or On or Off)."""
def set(self, s):
s = s.strip().lower()
if s in ('true', 'on', 'enable', 'enabled'):
value = True
elif s in ('false', 'off', 'disable', 'disabled'):
value = False
elif s == 'toggle':
value = not self.value
else:
self.error()
self.setValue(value)
def setValue(self, v):
Value.setValue(self, bool(v))
class Integer(Value):
"""Value must be an integer."""
def set(self, s):
try:
self.setValue(int(s))
except ValueError:
self.error()
class PositiveInteger(Value):
"""Value must be positive (non-zero) integer."""
def set(self, s):
try:
self.setValue(int(s))
except ValueError:
self.error()
def setValue(self, v):
if v <= 0:
self.error()
Value.setValue(self, v)
class Float(Value):
"""Value must be a floating-point number."""
def set(self, s):
try:
self.setValue(float(s))
except ValueError:
self.error()
def setValue(self, v):
try:
Value.setValue(self, float(v))
except ValueError:
self.error()
class String(Value):
"""Value is not a valid Python string."""
def set(self, s):
if not s:
s = '""'
elif s[0] != s[-1] or s[0] not in '\'"':
s = repr(s)
try:
v = utils.safeEval(s)
if not isinstance(v, basestring):
raise ValueError
self.setValue(v)
except ValueError: # This catches utils.safeEval(s) errors too.
self.error()
class OnlySomeStrings(String):
validStrings = ()
def __init__(self, *args, **kwargs):
assert self.validStrings, 'There must be some valid strings. ' \
'This is a bug.'
String.__init__(self, *args, **kwargs)
def error(self):
raise InvalidRegistryValue, \
'That is not a valid value. Valid values include %s.' % \
utils.commaAndify(map(repr, self.validStrings))
def normalize(self, s):
lowered = s.lower()
L = list(map(str.lower, self.validStrings))
try:
i = L.index(lowered)
except ValueError:
return s # This is handled in setValue.
return self.validStrings[i]
def setValue(self, s):
s = self.normalize(s)
if s in self.validStrings:
String.setValue(self, s)
else:
self.error()
class NormalizedString(String):
def set(self, s):
s = utils.normalizeWhitespace(s.strip())
String.set(self, s)
def setValue(self, s):
s = utils.normalizeWhitespace(s.strip())
String.setValue(self, s)
class StringSurroundedBySpaces(String):
def set(self, s):
String.set(self, s)
self.setValue(self.value)
def setValue(self, v):
if v.lstrip() == v:
v= ' ' + v
if v.rstrip() == v:
v += ' '
String.setValue(self, v)
class StringWithSpaceOnRight(String):
def setValue(self, v):
if v.rstrip() == v:
v += ' '
String.setValue(self, v)
class Regexp(Value):
def error(self, e):
raise InvalidRegistryValue, 'Invalid regexp: %s' % e
def set(self, s):
try:
if s:
self.value = utils.perlReToPythonRe(s)
self._lastModified = time.time()
else:
self.setValue(None)
self.sr = s
except ValueError, e:
self.error(e)
def setValue(self, v):
if v is None:
self.sr = ''
Value.setValue(self, None)
else:
raise InvalidRegistryValue, \
'Can\'t setValue a regexp, there would be an inconsistency '\
'between the regexp and the recorded string value.'
def __str__(self):
self() # Gotta update if we've been reloaded.
return self.sr
class SeparatedListOf(Value):
List = list
Value = Value
def splitter(self, s):
"""Override this with a function that takes a string and returns a list
of strings."""
raise NotImplementedError
def joiner(self, L):
"""Override this to join the internal list for output."""
raise NotImplementedError
def set(self, s):
L = self.splitter(s)
for (i, s) in enumerate(L):
v = self.Value(s, 'help does not matter here')
L[i] = v()
self.setValue(L)
def setValue(self, v):
Value.setValue(self, self.List(v))
def __str__(self):
value = self()
if value:
return self.joiner(value)
else:
# We must return *something* here, otherwise down along the road we
# can run into issues showing users the value if they've disabled
# nick prefixes in any of the numerous ways possible. Since the
# config parser doesn't care about this space, we'll use it :)
return ' '
class SpaceSeparatedListOf(SeparatedListOf):
def splitter(self, s):
return s.split()
joiner = ' '.join
class SpaceSeparatedListOfStrings(SpaceSeparatedListOf):
Value = String
class CommaSeparatedListOfStrings(SeparatedListOf):
Value = String
def splitter(self, s):
return re.split(r'\s*,\s*', s)
joiner = ', '.join
if __name__ == '__main__':
#if 1:
import sys
sys.setrecursionlimit(40)
supybot = Group()
supybot.setName('supybot')
supybot.register('throttleTime', Float(1, """Determines the minimum
number of seconds the bot will wait between sending messages to the server.
"""))
supybot.register('plugins')
supybot.plugins.register('Topic')
supybot.plugins.topic.register('separator',
StringSurroundedBySpaces(' || ', """Determines what separator the bot
uses to separate topic entries.""", supplyDefault=True))
supybot.plugins.topic.separator.get('#supybot').set(' |||| ')
supybot.plugins.topic.separator.set(' <> ')
supybot.throttleTime.set(10)
supybot.register('log')
supybot.log.register('stdout', Boolean(False, """Help for stdout."""))
supybot.log.stdout.register('colorized', Boolean(False,
'Help colorized'))
supybot.log.stdout.setValue(True)
for (k, v) in supybot.getValues():
print '%s: %s' % (k, v)
print
print 'Asking children'
print
for (k, v) in supybot.getValues(getChildren=True):
print '%s: %s' % (k, v)
print supybot.throttleTime.help
print supybot.plugins.topic.separator.help
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: