2262
2318
The option *values* are stored in config files and found in sections.
2264
2320
Here we define various properties about the option itself, its default
2265
value, in which config files it can be stored, etc (TBC).
2321
value, how to convert it from stores, what to do when invalid values are
2322
encoutered, in which config files it can be stored.
2268
def __init__(self, name, default=None):
2325
def __init__(self, name, default=None, default_from_env=None,
2327
from_unicode=None, invalid=None):
2328
"""Build an option definition.
2330
:param name: the name used to refer to the option.
2332
:param default: the default value to use when none exist in the config
2333
stores. This is either a string that ``from_unicode`` will convert
2334
into the proper type or a python object that can be stringified (so
2335
only the empty list is supported for example).
2337
:param default_from_env: A list of environment variables which can
2338
provide a default value. 'default' will be used only if none of the
2339
variables specified here are set in the environment.
2341
:param help: a doc string to explain the option to the user.
2343
:param from_unicode: a callable to convert the unicode string
2344
representing the option value in a store. This is not called for
2347
:param invalid: the action to be taken when an invalid value is
2348
encountered in a store. This is called only when from_unicode is
2349
invoked to convert a string and returns None or raise ValueError or
2350
TypeError. Accepted values are: None (ignore invalid values),
2351
'warning' (emit a warning), 'error' (emit an error message and
2354
if default_from_env is None:
2355
default_from_env = []
2269
2356
self.name = name
2270
self.default = default
2357
# Convert the default value to a unicode string so all values are
2358
# strings internally before conversion (via from_unicode) is attempted.
2361
elif isinstance(default, list):
2362
# Only the empty list is supported
2364
raise AssertionError(
2365
'Only empty lists are supported as default values')
2367
elif isinstance(default, (str, unicode, bool, int, float)):
2368
# Rely on python to convert strings, booleans and integers
2369
self.default = u'%s' % (default,)
2371
# other python objects are not expected
2372
raise AssertionError('%r is not supported as a default value'
2374
self.default_from_env = default_from_env
2376
self.from_unicode = from_unicode
2377
if invalid and invalid not in ('warning', 'error'):
2378
raise AssertionError("%s not supported for 'invalid'" % (invalid,))
2379
self.invalid = invalid
2381
def convert_from_unicode(self, unicode_value):
2382
if self.from_unicode is None or unicode_value is None:
2383
# Don't convert or nothing to convert
2384
return unicode_value
2386
converted = self.from_unicode(unicode_value)
2387
except (ValueError, TypeError):
2388
# Invalid values are ignored
2390
if converted is None and self.invalid is not None:
2391
# The conversion failed
2392
if self.invalid == 'warning':
2393
trace.warning('Value "%s" is not valid for "%s"',
2394
unicode_value, self.name)
2395
elif self.invalid == 'error':
2396
raise errors.ConfigOptionValueError(self.name, unicode_value)
2272
2399
def get_default(self):
2278
option_registry = registry.Registry()
2281
option_registry.register(
2282
'editor', Option('editor'),
2283
help='The command called to launch an editor to enter a message.')
2401
for var in self.default_from_env:
2403
# If the env variable is defined, its value is the default one
2404
value = os.environ[var]
2409
# Otherwise, fallback to the value defined at registration
2410
value = self.default
2413
def get_help_text(self, additional_see_also=None, plain=True):
2415
from bzrlib import help_topics
2416
result += help_topics._format_see_also(additional_see_also)
2418
result = help_topics.help_as_plain_text(result)
2422
# Predefined converters to get proper values from store
2424
def bool_from_store(unicode_str):
2425
return ui.bool_from_string(unicode_str)
2428
def int_from_store(unicode_str):
2429
return int(unicode_str)
2432
def float_from_store(unicode_str):
2433
return float(unicode_str)
2437
# Use a an empty dict to initialize an empty configobj avoiding all
2438
# parsing and encoding checks
2439
_list_converter_config = configobj.ConfigObj(
2440
{}, encoding='utf-8', list_values=True, interpolation=False)
2443
def list_from_store(unicode_str):
2444
if not isinstance(unicode_str, basestring):
2446
# Now inject our string directly as unicode. All callers got their value
2447
# from configobj, so values that need to be quoted are already properly
2449
_list_converter_config.reset()
2450
_list_converter_config._parse([u"list=%s" % (unicode_str,)])
2451
maybe_list = _list_converter_config['list']
2452
# ConfigObj return '' instead of u''. Use 'str' below to catch all cases.
2453
if isinstance(maybe_list, basestring):
2455
# A single value, most probably the user forgot (or didn't care to
2456
# add) the final ','
2459
# The empty string, convert to empty list
2462
# We rely on ConfigObj providing us with a list already
2467
class OptionRegistry(registry.Registry):
2468
"""Register config options by their name.
2470
This overrides ``registry.Registry`` to simplify registration by acquiring
2471
some information from the option object itself.
2474
def register(self, option):
2475
"""Register a new option to its name.
2477
:param option: The option to register. Its name is used as the key.
2479
super(OptionRegistry, self).register(option.name, option,
2482
def register_lazy(self, key, module_name, member_name):
2483
"""Register a new option to be loaded on request.
2485
:param key: the key to request the option later. Since the registration
2486
is lazy, it should be provided and match the option name.
2488
:param module_name: the python path to the module. Such as 'os.path'.
2490
:param member_name: the member of the module to return. If empty or
2491
None, get() will return the module itself.
2493
super(OptionRegistry, self).register_lazy(key,
2494
module_name, member_name)
2496
def get_help(self, key=None):
2497
"""Get the help text associated with the given key"""
2498
option = self.get(key)
2499
the_help = option.help
2500
if callable(the_help):
2501
return the_help(self, key)
2505
option_registry = OptionRegistry()
2508
# Registered options in lexicographical order
2510
option_registry.register(
2511
Option('bzr.workingtree.worth_saving_limit', default=10,
2512
from_unicode=int_from_store, invalid='warning',
2514
How many changes before saving the dirstate.
2516
-1 means that we will never rewrite the dirstate file for only
2517
stat-cache changes. Regardless of this setting, we will always rewrite
2518
the dirstate file if a file is added/removed/renamed/etc. This flag only
2519
affects the behavior of updating the dirstate file after we notice that
2520
a file has been touched.
2522
option_registry.register(
2523
Option('dirstate.fdatasync', default=True,
2524
from_unicode=bool_from_store,
2526
Flush dirstate changes onto physical disk?
2528
If true (default), working tree metadata changes are flushed through the
2529
OS buffers to physical disk. This is somewhat slower, but means data
2530
should not be lost if the machine crashes. See also repository.fdatasync.
2532
option_registry.register(
2533
Option('debug_flags', default=[], from_unicode=list_from_store,
2534
help='Debug flags to activate.'))
2535
option_registry.register(
2536
Option('default_format', default='2a',
2537
help='Format used when creating branches.'))
2538
option_registry.register(
2539
Option('dpush_strict', default=None,
2540
from_unicode=bool_from_store,
2542
The default value for ``dpush --strict``.
2544
If present, defines the ``--strict`` option default value for checking
2545
uncommitted changes before pushing into a different VCS without any
2546
custom bzr metadata.
2548
option_registry.register(
2550
help='The command called to launch an editor to enter a message.'))
2551
option_registry.register(
2552
Option('ignore_missing_extensions', default=False,
2553
from_unicode=bool_from_store,
2555
Control the missing extensions warning display.
2557
The warning will not be emitted if set to True.
2559
option_registry.register(
2561
help='Language to translate messages into.'))
2562
option_registry.register(
2563
Option('locks.steal_dead', default=False, from_unicode=bool_from_store,
2565
Steal locks that appears to be dead.
2567
If set to True, bzr will check if a lock is supposed to be held by an
2568
active process from the same user on the same machine. If the user and
2569
machine match, but no process with the given PID is active, then bzr
2570
will automatically break the stale lock, and create a new lock for
2572
Otherwise, bzr will prompt as normal to break the lock.
2574
option_registry.register(
2575
Option('output_encoding',
2576
help= 'Unicode encoding for output'
2577
' (terminal encoding if not specified).'))
2578
option_registry.register(
2579
Option('push_strict', default=None,
2580
from_unicode=bool_from_store,
2582
The default value for ``push --strict``.
2584
If present, defines the ``--strict`` option default value for checking
2585
uncommitted changes before sending a merge directive.
2587
option_registry.register(
2588
Option('repository.fdatasync', default=True,
2589
from_unicode=bool_from_store,
2591
Flush repository changes onto physical disk?
2593
If true (default), repository changes are flushed through the OS buffers
2594
to physical disk. This is somewhat slower, but means data should not be
2595
lost if the machine crashes. See also dirstate.fdatasync.
2597
option_registry.register(
2598
Option('send_strict', default=None,
2599
from_unicode=bool_from_store,
2601
The default value for ``send --strict``.
2603
If present, defines the ``--strict`` option default value for checking
2604
uncommitted changes before pushing.
2607
option_registry.register(
2608
Option('serve.client_timeout',
2609
default=300.0, from_unicode=float_from_store,
2610
help="If we wait for a new request from a client for more than"
2611
" X seconds, consider the client idle, and hangup."))
2286
2614
class Section(object):
2735
3139
if value is not None:
3141
# If the option is registered, it may provide additional info about
3144
opt = option_registry.get(name)
3148
def expand_and_convert(val):
3149
# This may need to be called twice if the value is None or ends up
3150
# being None during expansion or conversion.
3153
if isinstance(val, basestring):
3154
val = self._expand_options_in_string(val)
3156
trace.warning('Cannot expand "%s":'
3157
' %s does not support option expansion'
3158
% (name, type(val)))
3160
val = opt.convert_from_unicode(val)
3162
value = expand_and_convert(value)
3163
if opt is not None and value is None:
2738
3164
# If the option is registered, it may provide a default value
2740
opt = option_registry.get(name)
2745
value = opt.get_default()
3165
value = opt.get_default()
3166
value = expand_and_convert(value)
2746
3167
for hook in ConfigHooks['get']:
2747
3168
hook(self, name, value)
3171
def expand_options(self, string, env=None):
3172
"""Expand option references in the string in the configuration context.
3174
:param string: The string containing option(s) to expand.
3176
:param env: An option dict defining additional configuration options or
3177
overriding existing ones.
3179
:returns: The expanded string.
3181
return self._expand_options_in_string(string, env)
3183
def _expand_options_in_string(self, string, env=None, _refs=None):
3184
"""Expand options in the string in the configuration context.
3186
:param string: The string to be expanded.
3188
:param env: An option dict defining additional configuration options or
3189
overriding existing ones.
3191
:param _refs: Private list (FIFO) containing the options being expanded
3194
:returns: The expanded string.
3197
# Not much to expand there
3200
# What references are currently resolved (to detect loops)
3203
# We need to iterate until no more refs appear ({{foo}} will need two
3204
# iterations for example).
3206
raw_chunks = Stack._option_ref_re.split(result)
3207
if len(raw_chunks) == 1:
3208
# Shorcut the trivial case: no refs
3211
# Split will isolate refs so that every other chunk is a ref
3212
chunk_is_ref = False
3213
for chunk in raw_chunks:
3214
if not chunk_is_ref:
3215
chunks.append(chunk)
3220
raise errors.OptionExpansionLoop(string, _refs)
3222
value = self._expand_option(name, env, _refs)
3224
raise errors.ExpandingUnknownOption(name, string)
3225
chunks.append(value)
3227
chunk_is_ref = False
3228
result = ''.join(chunks)
3231
def _expand_option(self, name, env, _refs):
3232
if env is not None and name in env:
3233
# Special case, values provided in env takes precedence over
3237
# FIXME: This is a limited implementation, what we really need is a
3238
# way to query the bzr config for the value of an option,
3239
# respecting the scope rules (That is, once we implement fallback
3240
# configs, getting the option value should restart from the top
3241
# config, not the current one) -- vila 20101222
3242
value = self.get(name, expand=False)
3243
value = self._expand_options_in_string(value, env, _refs)
2750
3246
def _get_mutable_section(self):
2751
3247
"""Get the MutableSection for the Stack.