13
14
# You should have received a copy of the GNU General Public License
14
15
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17
18
"""Symbol versioning
19
20
The methods here allow for api symbol versioning.
22
from __future__ import absolute_import
24
23
__all__ = ['deprecated_function',
27
25
'deprecated_method',
28
26
'DEPRECATED_PARAMETER',
29
27
'deprecated_passed',
28
'warn', 'set_warning_method', 'zero_seven',
36
# Import the 'warn' symbol so bzrlib can call it even if we redefine it
37
48
from warnings import warn
42
51
DEPRECATED_PARAMETER = "A deprecated parameter marker."
45
def deprecated_in(version_tuple):
46
"""Generate a message that something was deprecated in a release.
48
>>> deprecated_in((1, 4, 0))
49
'%s was deprecated in version 1.4.0.'
51
return ("%%s was deprecated in version %s."
52
% bzrlib._format_version_tuple(version_tuple))
52
zero_seven = "%s was deprecated in version 0.7."
53
zero_eight = "%s was deprecated in version 0.8."
54
zero_nine = "%s was deprecated in version 0.9."
55
zero_ten = "%s was deprecated in version 0.10."
56
zero_eleven = "%s was deprecated in version 0.11."
57
zero_twelve = "%s was deprecated in version 0.12."
58
zero_thirteen = "%s was deprecated in version 0.13."
59
zero_fourteen = "%s was deprecated in version 0.14."
60
zero_fifteen = "%s was deprecated in version 0.15."
61
zero_sixteen = "%s was deprecated in version 0.16."
62
zero_seventeen = "%s was deprecated in version 0.17."
63
zero_eighteen = "%s was deprecated in version 0.18."
64
zero_ninety = "%s was deprecated in version 0.90."
65
zero_ninetyone = "%s was deprecated in version 0.91."
66
zero_ninetytwo = "%s was deprecated in version 0.92."
67
one_zero = "%s was deprecated in version 1.0."
68
zero_ninetythree = one_zero # Maintained for backwards compatibility
69
one_one = "%s was deprecated in version 1.1."
55
72
def set_warning_method(method):
94
111
def function_decorator(callable):
95
112
"""This is the function python calls to perform the decoration."""
97
114
def decorated_function(*args, **kwargs):
98
115
"""This is the decorated function."""
99
from bzrlib import trace
100
trace.mutter_callsite(4, "Deprecated function called")
101
116
warn(deprecation_string(callable, deprecation_version),
102
117
DeprecationWarning, stacklevel=2)
103
118
return callable(*args, **kwargs)
110
125
def deprecated_method(deprecation_version):
111
126
"""Decorate a method so that use of it will trigger a warning.
113
To deprecate a static or class method, use
128
To deprecate a static or class method, use
116
131
@deprecated_function
119
134
To deprecate an entire class, decorate __init__.
122
137
def method_decorator(callable):
123
138
"""This is the function python calls to perform the decoration."""
125
140
def decorated_method(self, *args, **kwargs):
126
141
"""This is the decorated method."""
127
from bzrlib import trace
128
142
if callable.__name__ == '__init__':
129
143
symbol = "%s.%s" % (self.__class__.__module__,
130
144
self.__class__.__name__,
134
148
self.__class__.__name__,
135
149
callable.__name__
137
trace.mutter_callsite(4, "Deprecated method called")
138
151
warn(deprecation_version % symbol, DeprecationWarning, stacklevel=2)
139
152
return callable(self, *args, **kwargs)
140
153
_populate_decorated(callable, deprecation_version, "method",
146
159
def deprecated_passed(parameter_value):
147
160
"""Return True if parameter_value was used."""
148
# FIXME: it might be nice to have a parameter deprecation decorator.
161
# FIXME: it might be nice to have a parameter deprecation decorator.
149
162
# it would need to handle positional and *args and **kwargs parameters,
150
163
# which means some mechanism to describe how the parameter was being
151
164
# passed before deprecation, and some way to deprecate parameters that
153
166
# we cannot just forward to a new method name.I.e. in the following
154
167
# examples we would want to have callers that pass any value to 'bad' be
155
168
# given a warning - because we have applied:
156
# @deprecated_parameter('bad', deprecated_in((1, 5, 0))
169
# @deprecated_parameter('bad', zero_seven)
158
171
# def __init__(self, bad=None)
159
172
# def __init__(self, bad, other)
222
235
"""Create a dict that warns when read or modified.
224
:param deprecation_version: string for the warning format to raise,
225
typically from deprecated_in()
237
:param deprecation_version: something like zero_nine
226
238
:param initial_value: The contents of the dict
227
239
:param variable_name: This allows better warnings to be printed
228
:param advice: String of advice on what callers should do instead
240
:param advice: String of advice on what callers should do instead
229
241
of using this variable.
231
243
self._deprecation_version = deprecation_version
247
259
initial_value, extra=None):
248
260
"""Create a list that warns when modified
250
:param deprecation_version: string for the warning format to raise,
251
typically from deprecated_in()
262
:param deprecation_version: something like zero_nine
252
263
:param initial_value: The contents of the list
253
264
:param variable_name: This allows better warnings to be printed
254
265
:param extra: Extra info to print when printing a warning
267
278
def _warn_deprecated(self, func, *args, **kwargs):
268
279
warn(msg, DeprecationWarning, stacklevel=3)
269
280
return func(self, *args, **kwargs)
271
282
def append(self, obj):
272
283
"""appending to %s is deprecated""" % (variable_name,)
273
284
return self._warn_deprecated(list.append, obj)
293
304
return self._warn_deprecated(list.pop)
295
306
return _DeprecatedList(initial_value)
298
def _check_for_filter(error_only):
299
"""Check if there is already a filter for deprecation warnings.
301
:param error_only: Only match an 'error' filter
302
:return: True if a filter is found, False otherwise
304
for filter in warnings.filters:
305
if issubclass(DeprecationWarning, filter[2]):
306
# This filter will effect DeprecationWarning
307
if not error_only or filter[0] == 'error':
312
def _remove_filter_callable(filter):
313
"""Build and returns a callable removing filter from the warnings.
315
:param filter: The filter to remove (can be None).
317
:return: A callable that will remove filter from warnings.filters.
321
warnings.filters.remove(filter)
325
def suppress_deprecation_warnings(override=True):
326
"""Call this function to suppress all deprecation warnings.
328
When this is a final release version, we don't want to annoy users with
329
lots of deprecation warnings. We only want the deprecation warnings when
330
running a dev or release candidate.
332
:param override: If True, always set the ignore, if False, only set the
333
ignore if there isn't already a filter.
335
:return: A callable to remove the new warnings this added.
337
if not override and _check_for_filter(error_only=False):
338
# If there is already a filter effecting suppress_deprecation_warnings,
342
warnings.filterwarnings('ignore', category=DeprecationWarning)
343
filter = warnings.filters[0]
344
return _remove_filter_callable(filter)
347
def activate_deprecation_warnings(override=True):
348
"""Call this function to activate deprecation warnings.
350
When running in a 'final' release we suppress deprecation warnings.
351
However, the test suite wants to see them. So when running selftest, we
352
re-enable the deprecation warnings.
354
Note: warnings that have already been issued under 'ignore' will not be
355
reported after this point. The 'warnings' module has already marked them as
356
handled, so they don't get issued again.
358
:param override: If False, only add a filter if there isn't an error filter
359
already. (This slightly differs from suppress_deprecation_warnings, in
360
because it always overrides everything but -Werror).
362
:return: A callable to remove the new warnings this added.
364
if not override and _check_for_filter(error_only=True):
365
# DeprecationWarnings are already turned into errors, don't downgrade
369
warnings.filterwarnings('default', category=DeprecationWarning)
370
filter = warnings.filters[0]
371
return _remove_filter_callable(filter)