1
# Copyright (C) 2004, 2005 by Canonical Ltd
1
# Copyright (C) 2004, 2005, 2007 Canonical Ltd
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
5
5
# the Free Software Foundation; either version 2 of the License, or
6
6
# (at your option) any later version.
8
8
# This program is distributed in the hope that it will be useful,
9
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
11
# GNU General Public License for more details.
13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
"""bzr python plugin support
20
Any python module in $BZR_PLUGIN_PATH will be imported upon initialization of
21
bzrlib. The module will be imported as 'bzrlib.plugins.$BASENAME(PLUGIN)'.
22
In the plugin's main body, it should update any bzrlib registries it wants to
23
extend; for example, to add new commands, import bzrlib.commands and add your
24
new command to the plugin_cmds variable.
18
"""bzr python plugin support.
20
When load_plugins() is invoked, any python module in any directory in
21
$BZR_PLUGIN_PATH will be imported. The module will be imported as
22
'bzrlib.plugins.$BASENAME(PLUGIN)'. In the plugin's main body, it should
23
update any bzrlib registries it wants to extend; for example, to add new
24
commands, import bzrlib.commands and add your new command to the plugin_cmds
27
BZR_PLUGIN_PATH is also honoured for any plugins imported via
28
'import bzrlib.plugins.PLUGINNAME', as long as set_plugins_path has been
27
# TODO: Refactor this to make it more testable. The main problem at the
28
# moment is that loading plugins affects the global process state -- for bzr
29
# in general use it's a reasonable assumption that all plugins are loaded at
30
# startup and then stay loaded, but this is less good for testing.
32
# Several specific issues:
33
# - plugins can't be unloaded and will continue to effect later tests
34
# - load_plugins does nothing if called a second time
35
# - plugin hooks can't be removed
37
# Our options are either to remove these restrictions, or work around them by
38
# loading the plugins into a different space than the one running the tests.
39
# That could be either a separate Python interpreter or perhaps a new
40
# namespace inside this interpreter.
35
from bzrlib.lazy_import import lazy_import
36
lazy_import(globals(), """
48
from bzrlib.config import config_dir
49
from bzrlib.trace import log_error, mutter, log_exception, warning, \
51
from bzrlib.errors import BzrError
52
from bzrlib import plugins
53
from bzrlib.osutils import pathjoin
55
DEFAULT_PLUGIN_PATH = pathjoin(config_dir(), 'plugins')
46
from bzrlib import plugins as _mod_plugins
49
from bzrlib.symbol_versioning import deprecated_function, one_three
50
from bzrlib.trace import mutter, warning, log_exception_quietly
53
DEFAULT_PLUGIN_PATH = None
61
"""Return a dictionary of the plugins."""
63
for name, plugin in bzrlib.plugins.__dict__.items():
64
if isinstance(plugin, types.ModuleType):
56
def get_default_plugin_path():
57
"""Get the DEFAULT_PLUGIN_PATH"""
58
global DEFAULT_PLUGIN_PATH
59
if DEFAULT_PLUGIN_PATH is None:
60
DEFAULT_PLUGIN_PATH = osutils.pathjoin(config.config_dir(), 'plugins')
61
return DEFAULT_PLUGIN_PATH
69
64
def disable_plugins():
111
135
Plugins are loaded into bzrlib.plugins.NAME, and can be found there
112
136
for future reference.
138
The python module path for bzrlib.plugins will be modified to be 'dirs'.
114
# The problem with imp.get_suffixes() is that it doesn't include
115
# .pyo which is technically valid
116
# It also means that "testmodule.so" will show up as both test and testmodule
117
# though it is only valid as 'test'
118
# but you should be careful, because "testmodule.py" loads as testmodule.
119
suffixes = imp.get_suffixes()
120
suffixes.append(('.pyo', 'rb', imp.PY_COMPILED))
121
package_entries = ['__init__.py', '__init__.pyc', '__init__.pyo']
140
# We need to strip the trailing separators here as well as in the
141
# set_plugins_path function because calling code can pass anything in to
142
# this function, and since it sets plugins.__path__, it should set it to
143
# something that will be valid for Python to use (in case people try to
144
# run "import bzrlib.plugins.PLUGINNAME" after calling this function).
145
_mod_plugins.__path__ = map(_strip_trailing_sep, dirs)
125
149
mutter('looking for plugins in %s', d)
127
if not os.path.isdir(d):
129
for f in os.listdir(d):
130
path = pathjoin(d, f)
131
if os.path.isdir(path):
132
for entry in package_entries:
133
# This directory should be a package, and thus added to
135
if os.path.isfile(pathjoin(path, entry)):
137
else: # This directory is not a package
140
for suffix_info in suffixes:
141
if f.endswith(suffix_info[0]):
142
f = f[:-len(suffix_info[0])]
143
if suffix_info[2] == imp.C_EXTENSION and f.endswith('module'):
144
f = f[:-len('module')]
148
if getattr(bzrlib.plugins, f, None):
149
mutter('Plugin name %s already loaded', f)
151
mutter('add plugin name %s', f)
154
plugin_names = list(plugin_names)
156
for name in plugin_names:
158
plugin_info = imp.find_module(name, [d])
159
mutter('load plugin %r', plugin_info)
161
plugin = imp.load_module('bzrlib.plugins.' + name,
163
setattr(bzrlib.plugins, name, plugin)
165
if plugin_info[0] is not None:
166
plugin_info[0].close()
168
mutter('loaded succesfully')
169
except KeyboardInterrupt:
172
## import pdb; pdb.set_trace()
154
# backwards compatability: load_from_dirs was the old name
155
# This was changed in 0.15
156
load_from_dirs = load_from_path
159
def load_from_dir(d):
160
"""Load the plugins in directory d."""
161
# Get the list of valid python suffixes for __init__.py?
162
# this includes .py, .pyc, and .pyo (depending on if we are running -O)
163
# but it doesn't include compiled modules (.so, .dll, etc)
164
valid_suffixes = [suffix for suffix, mod_type, flags in imp.get_suffixes()
165
if flags in (imp.PY_SOURCE, imp.PY_COMPILED)]
166
package_entries = ['__init__'+suffix for suffix in valid_suffixes]
168
for f in os.listdir(d):
169
path = osutils.pathjoin(d, f)
170
if os.path.isdir(path):
171
for entry in package_entries:
172
# This directory should be a package, and thus added to
174
if os.path.isfile(osutils.pathjoin(path, entry)):
176
else: # This directory is not a package
179
for suffix_info in imp.get_suffixes():
180
if f.endswith(suffix_info[0]):
181
f = f[:-len(suffix_info[0])]
182
if suffix_info[2] == imp.C_EXTENSION and f.endswith('module'):
183
f = f[:-len('module')]
187
if getattr(_mod_plugins, f, None):
188
mutter('Plugin name %s already loaded', f)
190
# mutter('add plugin name %s', f)
193
for name in plugin_names:
195
exec "import bzrlib.plugins.%s" % name in {}
196
except KeyboardInterrupt:
199
## import pdb; pdb.set_trace()
200
if re.search('\.|-| ', name):
201
sanitised_name = re.sub('[-. ]', '_', name)
202
if sanitised_name.startswith('bzr_'):
203
sanitised_name = sanitised_name[len('bzr_'):]
204
warning("Unable to load %r in %r as a plugin because the "
205
"file path isn't a valid module name; try renaming "
206
"it to %r." % (name, d, sanitised_name))
173
208
warning('Unable to load plugin %r from %r' % (name, d))
174
log_exception_quietly()
209
log_exception_quietly()
212
@deprecated_function(one_three)
213
def load_from_zip(zip_name):
214
"""Load all the plugins in a zip."""
215
valid_suffixes = ('.py', '.pyc', '.pyo') # only python modules/packages
218
index = zip_name.rindex('.zip')
221
archive = zip_name[:index+4]
222
prefix = zip_name[index+5:]
224
mutter('Looking for plugins in %r', zip_name)
226
# use zipfile to get list of files/dirs inside zip
228
z = zipfile.ZipFile(archive)
229
namelist = z.namelist()
231
except zipfile.error:
236
prefix = prefix.replace('\\','/')
237
if prefix[-1] != '/':
240
namelist = [name[ix:]
242
if name.startswith(prefix)]
244
mutter('Names in archive: %r', namelist)
246
for name in namelist:
247
if not name or name.endswith('/'):
250
# '/' is used to separate pathname components inside zip archives
253
head, tail = '', name
255
head, tail = name.rsplit('/',1)
257
# we don't need looking in subdirectories
260
base, suffix = osutils.splitext(tail)
261
if suffix not in valid_suffixes:
264
if base == '__init__':
275
if getattr(_mod_plugins, plugin_name, None):
276
mutter('Plugin name %s already loaded', plugin_name)
280
exec "import bzrlib.plugins.%s" % plugin_name in {}
281
mutter('Load plugin %s from zip %r', plugin_name, zip_name)
282
except KeyboardInterrupt:
285
## import pdb; pdb.set_trace()
286
warning('Unable to load plugin %r from %r'
288
log_exception_quietly()
292
"""Return a dictionary of the plugins.
294
Each item in the dictionary is a PlugIn object.
297
for name, plugin in _mod_plugins.__dict__.items():
298
if isinstance(plugin, types.ModuleType):
299
result[name] = PlugIn(name, plugin)
303
class PluginsHelpIndex(object):
304
"""A help index that returns help topics for plugins."""
307
self.prefix = 'plugins/'
309
def get_topics(self, topic):
310
"""Search for topic in the loaded plugins.
312
This will not trigger loading of new plugins.
314
:param topic: A topic to search for.
315
:return: A list which is either empty or contains a single
316
RegisteredTopic entry.
320
if topic.startswith(self.prefix):
321
topic = topic[len(self.prefix):]
322
plugin_module_name = 'bzrlib.plugins.%s' % topic
324
module = sys.modules[plugin_module_name]
328
return [ModuleHelpTopic(module)]
331
class ModuleHelpTopic(object):
332
"""A help topic which returns the docstring for a module."""
334
def __init__(self, module):
337
:param module: The module for which help should be generated.
341
def get_help_text(self, additional_see_also=None):
342
"""Return a string with the help for this topic.
344
:param additional_see_also: Additional help topics to be
347
if not self.module.__doc__:
348
result = "Plugin '%s' has no docstring.\n" % self.module.__name__
350
result = self.module.__doc__
351
if result[-1] != '\n':
353
# there is code duplicated here and in bzrlib/help_topic.py's
354
# matching Topic code. This should probably be factored in
355
# to a helper function and a common base class.
356
if additional_see_also is not None:
357
see_also = sorted(set(additional_see_also))
361
result += 'See also: '
362
result += ', '.join(see_also)
366
def get_help_topic(self):
367
"""Return the modules help topic - its __name__ after bzrlib.plugins.."""
368
return self.module.__name__[len('bzrlib.plugins.'):]
371
class PlugIn(object):
372
"""The bzrlib representation of a plugin.
374
The PlugIn object provides a way to manipulate a given plugin module.
377
def __init__(self, name, module):
378
"""Construct a plugin for module."""
383
"""Get the path that this plugin was loaded from."""
384
if getattr(self.module, '__path__', None) is not None:
385
return os.path.abspath(self.module.__path__[0])
386
elif getattr(self.module, '__file__', None) is not None:
387
path = os.path.abspath(self.module.__file__)
388
if path[-4:] in ('.pyc', '.pyo'):
389
pypath = path[:-4] + '.py'
390
if os.path.isfile(pypath):
394
return repr(self.module)
397
return "<%s.%s object at %s, name=%s, module=%s>" % (
398
self.__class__.__module__, self.__class__.__name__, id(self),
399
self.name, self.module)
403
def test_suite(self):
404
"""Return the plugin's test suite."""
405
if getattr(self.module, 'test_suite', None) is not None:
406
return self.module.test_suite()
410
def version_info(self):
411
"""Return the plugin's version_tuple or None if unknown."""
412
version_info = getattr(self.module, 'version_info', None)
413
if version_info is not None and len(version_info) == 3:
414
version_info = tuple(version_info) + ('final', 0)
417
def _get__version__(self):
418
version_info = self.version_info()
419
if version_info is None:
421
if version_info[3] == 'final':
422
version_string = '%d.%d.%d' % version_info[:3]
424
version_string = '%d.%d.%d%s%d' % version_info
425
return version_string
427
__version__ = property(_get__version__)
added
removed
bzrlib/plugin.py
