1
# Copyright (C) 2006, 2007 Canonical Ltd
2
# Authors: Robert Collins <robert.collins@canonical.com> and others
1
# Copyright (C) 2006, 2007, 2008, 2009 Canonical Ltd
4
3
# This program is free software; you can redistribute it and/or modify
5
4
# it under the terms of the GNU General Public License as published by
14
13
# You should have received a copy of the GNU General Public License
15
14
# along with this program; if not, write to the Free Software
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18
17
"""Symbol versioning
23
22
__all__ = ['deprecated_function',
25
25
'deprecated_method',
26
26
'DEPRECATED_PARAMETER',
27
27
'deprecated_passed',
28
'warn', 'set_warning_method', 'zero_seven',
40
32
from warnings import warn
43
37
DEPRECATED_PARAMETER = "A deprecated parameter marker."
44
zero_seven = "%s was deprecated in version 0.7."
45
zero_eight = "%s was deprecated in version 0.8."
46
zero_nine = "%s was deprecated in version 0.9."
47
zero_ten = "%s was deprecated in version 0.10."
48
zero_eleven = "%s was deprecated in version 0.11."
49
zero_twelve = "%s was deprecated in version 0.12."
50
zero_thirteen = "%s was deprecated in version 0.13."
51
zero_fourteen = "%s was deprecated in version 0.14."
52
zero_fifteen = "%s was deprecated in version 0.15."
53
zero_sixteen = "%s was deprecated in version 0.16."
40
def deprecated_in(version_tuple):
41
"""Generate a message that something was deprecated in a release.
43
>>> deprecated_in((1, 4, 0))
44
'%s was deprecated in version 1.4.0.'
46
return ("%%s was deprecated in version %s."
47
% bzrlib._format_version_tuple(version_tuple))
56
50
def set_warning_method(method):
76
70
have a single %s operator in it. a_callable will be turned into a nice
77
71
python symbol and then substituted into deprecation_version.
73
# We also want to handle old-style classes, in particular exception, and
74
# they don't have an im_class attribute.
79
75
if getattr(a_callable, 'im_class', None) is None:
80
76
symbol = "%s.%s" % (a_callable.__module__,
81
77
a_callable.__name__)
93
89
def function_decorator(callable):
94
90
"""This is the function python calls to perform the decoration."""
96
92
def decorated_function(*args, **kwargs):
97
93
"""This is the decorated function."""
94
from bzrlib import trace
95
trace.mutter_callsite(4, "Deprecated function called")
98
96
warn(deprecation_string(callable, deprecation_version),
99
97
DeprecationWarning, stacklevel=2)
100
98
return callable(*args, **kwargs)
107
105
def deprecated_method(deprecation_version):
108
106
"""Decorate a method so that use of it will trigger a warning.
108
To deprecate a static or class method, use
110
114
To deprecate an entire class, decorate __init__.
113
117
def method_decorator(callable):
114
118
"""This is the function python calls to perform the decoration."""
116
120
def decorated_method(self, *args, **kwargs):
117
121
"""This is the decorated method."""
118
symbol = "%s.%s.%s" % (self.__class__.__module__,
119
self.__class__.__name__,
122
from bzrlib import trace
123
if callable.__name__ == '__init__':
124
symbol = "%s.%s" % (self.__class__.__module__,
125
self.__class__.__name__,
128
symbol = "%s.%s.%s" % (self.__class__.__module__,
129
self.__class__.__name__,
132
trace.mutter_callsite(4, "Deprecated method called")
122
133
warn(deprecation_version % symbol, DeprecationWarning, stacklevel=2)
123
134
return callable(self, *args, **kwargs)
124
135
_populate_decorated(callable, deprecation_version, "method",
130
141
def deprecated_passed(parameter_value):
131
142
"""Return True if parameter_value was used."""
132
# FIXME: it might be nice to have a parameter deprecation decorator.
143
# FIXME: it might be nice to have a parameter deprecation decorator.
133
144
# it would need to handle positional and *args and **kwargs parameters,
134
145
# which means some mechanism to describe how the parameter was being
135
146
# passed before deprecation, and some way to deprecate parameters that
137
148
# we cannot just forward to a new method name.I.e. in the following
138
149
# examples we would want to have callers that pass any value to 'bad' be
139
150
# given a warning - because we have applied:
140
# @deprecated_parameter('bad', zero_seven)
151
# @deprecated_parameter('bad', deprecated_in((1, 5, 0))
142
153
# def __init__(self, bad=None)
143
154
# def __init__(self, bad, other)
155
166
if len(docstring_lines) == 0:
156
167
decorated_callable.__doc__ = deprecation_version % ("This " + label)
157
168
elif len(docstring_lines) == 1:
158
decorated_callable.__doc__ = (callable.__doc__
169
decorated_callable.__doc__ = (callable.__doc__
161
172
+ deprecation_version % ("This " + label)
206
217
"""Create a dict that warns when read or modified.
208
:param deprecation_version: something like zero_nine
219
:param deprecation_version: string for the warning format to raise,
220
typically from deprecated_in()
209
221
:param initial_value: The contents of the dict
210
222
:param variable_name: This allows better warnings to be printed
211
:param advice: String of advice on what callers should do instead
223
:param advice: String of advice on what callers should do instead
212
224
of using this variable.
214
226
self._deprecation_version = deprecation_version
230
242
initial_value, extra=None):
231
243
"""Create a list that warns when modified
233
:param deprecation_version: something like zero_nine
245
:param deprecation_version: string for the warning format to raise,
246
typically from deprecated_in()
234
247
:param initial_value: The contents of the list
235
248
:param variable_name: This allows better warnings to be printed
236
249
:param extra: Extra info to print when printing a warning
249
262
def _warn_deprecated(self, func, *args, **kwargs):
250
263
warn(msg, DeprecationWarning, stacklevel=3)
251
264
return func(self, *args, **kwargs)
253
266
def append(self, obj):
254
267
"""appending to %s is deprecated""" % (variable_name,)
255
268
return self._warn_deprecated(list.append, obj)
267
280
return self._warn_deprecated(list.remove, value)
269
282
def pop(self, index=None):
270
"""pop'ing from from %s is deprecated""" % (variable_name,)
283
"""pop'ing from %s is deprecated""" % (variable_name,)
272
285
return self._warn_deprecated(list.pop, index)
275
288
return self._warn_deprecated(list.pop)
277
290
return _DeprecatedList(initial_value)
293
def _check_for_filter(error_only):
294
"""Check if there is already a filter for deprecation warnings.
296
:param error_only: Only match an 'error' filter
297
:return: True if a filter is found, False otherwise
300
for filter in warnings.filters:
301
if issubclass(DeprecationWarning, filter[2]):
302
# This filter will effect DeprecationWarning
303
if not error_only or filter[0] == 'error':
308
def suppress_deprecation_warnings(override=True):
309
"""Call this function to suppress all deprecation warnings.
311
When this is a final release version, we don't want to annoy users with
312
lots of deprecation warnings. We only want the deprecation warnings when
313
running a dev or release candidate.
315
:param override: If True, always set the ignore, if False, only set the
316
ignore if there isn't already a filter.
319
if not override and _check_for_filter(error_only=False):
320
# If there is already a filter effecting suppress_deprecation_warnings,
323
warnings.filterwarnings('ignore', category=DeprecationWarning)
326
def activate_deprecation_warnings(override=True):
327
"""Call this function to activate deprecation warnings.
329
When running in a 'final' release we suppress deprecation warnings.
330
However, the test suite wants to see them. So when running selftest, we
331
re-enable the deprecation warnings.
333
Note: warnings that have already been issued under 'ignore' will not be
334
reported after this point. The 'warnings' module has already marked them as
335
handled, so they don't get issued again.
337
:param override: If False, only add a filter if there isn't an error filter
338
already. (This slightly differs from suppress_deprecation_warnings, in
339
because it always overrides everything but -Werror).
342
if not override and _check_for_filter(error_only=True):
343
# DeprecationWarnings are already turned into errors, don't downgrade
346
warnings.filterwarnings('default', category=DeprecationWarning)