72
72
Future calls to load_plugins() will be ignored.
74
global _plugins_disabled
75
_plugins_disabled = True
79
def describe_plugins(show_paths=False):
80
"""Generate text description of plugins.
82
Includes both those that have loaded, and those that failed to
85
:param show_paths: If true,
86
:returns: Iterator of text lines (including newlines.)
88
from inspect import getdoc
89
loaded_plugins = plugins()
90
all_names = sorted(list(set(
91
loaded_plugins.keys() + plugin_warnings.keys())))
92
for name in all_names:
93
if name in loaded_plugins:
94
plugin = loaded_plugins[name]
95
version = plugin.__version__
96
if version == 'unknown':
98
yield '%s %s\n' % (name, version)
99
d = getdoc(plugin.module)
101
doc = d.split('\n')[0]
103
doc = '(no description)'
104
yield (" %s\n" % doc)
106
yield (" %s\n" % plugin.path())
109
yield "%s (failed to load)\n" % name
110
if name in plugin_warnings:
111
for line in plugin_warnings[name]:
112
yield " ** " + line + '\n'
116
77
def _strip_trailing_sep(path):
117
78
return path.rstrip("\\/")
120
def _get_specific_plugin_paths(paths):
121
"""Returns the plugin paths from a string describing the associations.
123
:param paths: A string describing the paths associated with the plugins.
125
:returns: A list of (plugin name, path) tuples.
127
For example, if paths is my_plugin@/test/my-test:her_plugin@/production/her,
128
[('my_plugin', '/test/my-test'), ('her_plugin', '/production/her')]
131
Note that ':' in the example above depends on the os.
136
for spec in paths.split(os.pathsep):
138
name, path = spec.split('@')
140
raise errors.BzrCommandError(
141
'"%s" is not a valid <plugin_name>@<plugin_path> description '
143
specs.append((name, path))
147
81
def set_plugins_path(path=None):
148
82
"""Set the path for plugins to be loaded from.
155
89
path = get_standard_plugins_path()
156
90
_mod_plugins.__path__ = path
157
PluginImporter.reset()
158
# Set up a blacklist for disabled plugins
159
disabled_plugins = os.environ.get('BZR_DISABLE_PLUGINS', None)
160
if disabled_plugins is not None:
161
for name in disabled_plugins.split(os.pathsep):
162
PluginImporter.blacklist.add('bzrlib.plugins.' + name)
163
# Set up a the specific paths for plugins
164
for plugin_name, plugin_path in _get_specific_plugin_paths(os.environ.get(
165
'BZR_PLUGINS_AT', None)):
166
PluginImporter.specific_paths[
167
'bzrlib.plugins.%s' % plugin_name] = plugin_path
171
def _append_new_path(paths, new_path):
172
"""Append a new path if it set and not already known."""
173
if new_path is not None and new_path not in paths:
174
paths.append(new_path)
178
def get_core_plugin_path():
94
def get_standard_plugins_path():
95
"""Determine a plugin path suitable for general use."""
96
path = os.environ.get('BZR_PLUGIN_PATH',
97
get_default_plugin_path()).split(os.pathsep)
98
# Get rid of trailing slashes, since Python can't handle them when
99
# it tries to import modules.
100
path = map(_strip_trailing_sep, path)
180
101
bzr_exe = bool(getattr(sys, 'frozen', None))
181
102
if bzr_exe: # expand path for bzr.exe
182
103
# We need to use relative path to system-wide plugin
189
110
# then plugins directory is
190
111
# C:\Program Files\Bazaar\plugins
191
112
# so relative path is ../../../plugins
192
core_path = osutils.abspath(osutils.pathjoin(
193
osutils.dirname(__file__), '../../../plugins'))
194
else: # don't look inside library.zip
113
path.append(osutils.abspath(osutils.pathjoin(
114
osutils.dirname(__file__), '../../../plugins')))
115
if not bzr_exe: # don't look inside library.zip
195
116
# search the plugin path before the bzrlib installed dir
196
core_path = os.path.dirname(_mod_plugins.__file__)
200
def get_site_plugin_path():
201
"""Returns the path for the site installed plugins."""
202
if sys.platform == 'win32':
203
# We don't have (yet) a good answer for windows since that is certainly
204
# related to the way we build the installers. -- vila20090821
208
from distutils.sysconfig import get_python_lib
210
# If distutuils is not available, we just don't know where they are
213
site_path = osutils.pathjoin(get_python_lib(), 'bzrlib', 'plugins')
217
def get_user_plugin_path():
218
return osutils.pathjoin(config.config_dir(), 'plugins')
221
def get_standard_plugins_path():
222
"""Determine a plugin path suitable for general use."""
223
# Ad-Hoc default: core is not overriden by site but user can overrides both
224
# The rationale is that:
225
# - 'site' comes last, because these plugins should always be available and
226
# are supposed to be in sync with the bzr installed on site.
227
# - 'core' comes before 'site' so that running bzr from sources or a user
228
# installed version overrides the site version.
229
# - 'user' comes first, because... user is always right.
230
# - the above rules clearly defines which plugin version will be loaded if
231
# several exist. Yet, it is sometimes desirable to disable some directory
232
# so that a set of plugins is disabled as once. This can be done via
233
# -site, -core, -user.
235
env_paths = os.environ.get('BZR_PLUGIN_PATH', '+user').split(os.pathsep)
236
defaults = ['+core', '+site']
238
# The predefined references
239
refs = dict(core=get_core_plugin_path(),
240
site=get_site_plugin_path(),
241
user=get_user_plugin_path())
243
# Unset paths that should be removed
244
for k,v in refs.iteritems():
246
# defaults can never mention removing paths as that will make it
247
# impossible for the user to revoke these removals.
248
if removed in env_paths:
249
env_paths.remove(removed)
254
for p in env_paths + defaults:
255
if p.startswith('+'):
256
# Resolve references if they are known
260
# Leave them untouched so user can still use paths starting
263
_append_new_path(paths, p)
265
# Get rid of trailing slashes, since Python can't handle them when
266
# it tries to import modules.
267
paths = map(_strip_trailing_sep, paths)
117
path.append(os.path.dirname(_mod_plugins.__file__))
118
# search the arch independent path if we can determine that and
119
# the plugin is found nowhere else
120
if sys.platform != 'win32':
122
from distutils.sysconfig import get_python_lib
124
# If distutuils is not available, we just won't add that path
127
archless_path = osutils.pathjoin(get_python_lib(), 'bzrlib',
129
if archless_path not in path:
130
path.append(archless_path)
271
134
def load_plugins(path=None):
272
135
"""Load bzrlib plugins.
274
137
The environment variable BZR_PLUGIN_PATH is considered a delimited
275
set of paths to look through. Each entry is searched for `*.py`
138
set of paths to look through. Each entry is searched for *.py
276
139
files (and whatever other extensions are used in the platform,
279
load_from_path() provides the underlying mechanism and is called with
142
load_from_dirs() provides the underlying mechanism and is called with
280
143
the default directory list to provide the normal behaviour.
282
145
:param path: The list of paths to search for plugins. By default,
329
187
load_from_dirs = load_from_path
332
def _find_plugin_module(dir, name):
333
"""Check if there is a valid python module that can be loaded as a plugin.
335
:param dir: The directory where the search is performed.
336
:param path: An existing file path, either a python file or a package
339
:return: (name, path, description) name is the module name, path is the
340
file to load and description is the tuple returned by
343
path = osutils.pathjoin(dir, name)
344
if os.path.isdir(path):
345
# Check for a valid __init__.py file, valid suffixes depends on -O and
346
# can be .py, .pyc and .pyo
347
for suffix, mode, kind in imp.get_suffixes():
348
if kind not in (imp.PY_SOURCE, imp.PY_COMPILED):
349
# We don't recognize compiled modules (.so, .dll, etc)
351
init_path = osutils.pathjoin(path, '__init__' + suffix)
352
if os.path.isfile(init_path):
353
return name, init_path, (suffix, mode, kind)
355
for suffix, mode, kind in imp.get_suffixes():
356
if name.endswith(suffix):
357
# Clean up the module name
358
name = name[:-len(suffix)]
359
if kind == imp.C_EXTENSION and name.endswith('module'):
360
name = name[:-len('module')]
361
return name, path, (suffix, mode, kind)
362
# There is no python module here
363
return None, None, (None, None, None)
366
def record_plugin_warning(plugin_name, warning_message):
367
trace.mutter(warning_message)
368
plugin_warnings.setdefault(plugin_name, []).append(warning_message)
371
def _load_plugin_module(name, dir):
372
"""Load plugin name from dir.
374
:param name: The plugin name in the bzrlib.plugins namespace.
375
:param dir: The directory the plugin is loaded from for error messages.
377
if ('bzrlib.plugins.%s' % name) in PluginImporter.blacklist:
380
exec "import bzrlib.plugins.%s" % name in {}
381
except KeyboardInterrupt:
383
except errors.IncompatibleAPI, e:
385
"Unable to load plugin %r. It requested API version "
386
"%s of module %s but the minimum exported version is %s, and "
387
"the maximum is %s" %
388
(name, e.wanted, e.api, e.minimum, e.current))
389
record_plugin_warning(name, warning_message)
391
trace.warning("%s" % e)
392
if re.search('\.|-| ', name):
393
sanitised_name = re.sub('[-. ]', '_', name)
394
if sanitised_name.startswith('bzr_'):
395
sanitised_name = sanitised_name[len('bzr_'):]
396
trace.warning("Unable to load %r in %r as a plugin because the "
397
"file path isn't a valid module name; try renaming "
398
"it to %r." % (name, dir, sanitised_name))
400
record_plugin_warning(
402
'Unable to load plugin %r from %r' % (name, dir))
403
trace.log_exception_quietly()
404
if 'error' in debug.debug_flags:
405
trace.print_exception(sys.exc_info(), sys.stderr)
408
190
def load_from_dir(d):
409
191
"""Load the plugins in directory d.
411
193
d must be in the plugins module path already.
412
This function is called once for each directory in the module path.
195
# Get the list of valid python suffixes for __init__.py?
196
# this includes .py, .pyc, and .pyo (depending on if we are running -O)
197
# but it doesn't include compiled modules (.so, .dll, etc)
198
valid_suffixes = [suffix for suffix, mod_type, flags in imp.get_suffixes()
199
if flags in (imp.PY_SOURCE, imp.PY_COMPILED)]
200
package_entries = ['__init__'+suffix for suffix in valid_suffixes]
414
201
plugin_names = set()
415
for p in os.listdir(d):
416
name, path, desc = _find_plugin_module(d, p)
418
if name == '__init__':
419
# We do nothing with the __init__.py file in directories from
420
# the bzrlib.plugins module path, we may want to, one day
422
continue # We don't load __init__.py in the plugins dirs
423
elif getattr(_mod_plugins, name, None) is not None:
424
# The module has already been loaded from another directory
425
# during a previous call.
426
# FIXME: There should be a better way to report masked plugins
428
trace.mutter('Plugin name %s already loaded', name)
202
for f in os.listdir(d):
203
path = osutils.pathjoin(d, f)
204
if os.path.isdir(path):
205
for entry in package_entries:
206
# This directory should be a package, and thus added to
208
if os.path.isfile(osutils.pathjoin(path, entry)):
210
else: # This directory is not a package
213
for suffix_info in imp.get_suffixes():
214
if f.endswith(suffix_info[0]):
215
f = f[:-len(suffix_info[0])]
216
if suffix_info[2] == imp.C_EXTENSION and f.endswith('module'):
217
f = f[:-len('module')]
430
plugin_names.add(name)
222
continue # We don't load __init__.py again in the plugin dir
223
elif getattr(_mod_plugins, f, None):
224
trace.mutter('Plugin name %s already loaded', f)
226
# trace.mutter('add plugin name %s', f)
432
229
for name in plugin_names:
433
_load_plugin_module(name, d)
231
exec "import bzrlib.plugins.%s" % name in {}
232
except KeyboardInterrupt:
234
except errors.IncompatibleAPI, e:
235
trace.warning("Unable to load plugin %r. It requested API version "
236
"%s of module %s but the minimum exported version is %s, and "
237
"the maximum is %s" %
238
(name, e.wanted, e.api, e.minimum, e.current))
240
trace.warning("%s" % e)
241
## import pdb; pdb.set_trace()
242
if re.search('\.|-| ', name):
243
sanitised_name = re.sub('[-. ]', '_', name)
244
if sanitised_name.startswith('bzr_'):
245
sanitised_name = sanitised_name[len('bzr_'):]
246
trace.warning("Unable to load %r in %r as a plugin because the "
247
"file path isn't a valid module name; try renaming "
248
"it to %r." % (name, d, sanitised_name))
250
trace.warning('Unable to load plugin %r from %r' % (name, d))
251
trace.log_exception_quietly()
252
if 'error' in debug.debug_flags:
253
trace.print_exception(sys.exc_info(), sys.stderr)
595
413
return version_string
597
415
__version__ = property(_get__version__)
600
class _PluginImporter(object):
601
"""An importer tailored to bzr specific needs.
603
This is a singleton that takes care of:
604
- disabled plugins specified in 'blacklist',
605
- plugins that needs to be loaded from specific directories.
612
self.blacklist = set()
613
self.specific_paths = {}
615
def find_module(self, fullname, parent_path=None):
616
"""Search a plugin module.
618
Disabled plugins raise an import error, plugins with specific paths
619
returns a specific loader.
621
:return: None if the plugin doesn't need special handling, self
624
if not fullname.startswith('bzrlib.plugins.'):
626
if fullname in self.blacklist:
627
raise ImportError('%s is disabled' % fullname)
628
if fullname in self.specific_paths:
632
def load_module(self, fullname):
633
"""Load a plugin from a specific directory."""
634
# We are called only for specific paths
635
plugin_path = self.specific_paths[fullname]
637
if os.path.isdir(plugin_path):
638
for suffix, mode, kind in imp.get_suffixes():
639
if kind not in (imp.PY_SOURCE, imp.PY_COMPILED):
640
# We don't recognize compiled modules (.so, .dll, etc)
642
init_path = osutils.pathjoin(plugin_path, '__init__' + suffix)
643
if os.path.isfile(init_path):
644
# We've got a module here and load_module needs specific
646
loading_path = plugin_path
649
kind = imp.PKG_DIRECTORY
652
for suffix, mode, kind in imp.get_suffixes():
653
if plugin_path.endswith(suffix):
654
loading_path = plugin_path
656
if loading_path is None:
657
raise ImportError('%s cannot be loaded from %s'
658
% (fullname, plugin_path))
659
if kind is imp.PKG_DIRECTORY:
662
f = open(loading_path, mode)
664
mod = imp.load_module(fullname, f, loading_path,
665
(suffix, mode, kind))
666
mod.__package__ = fullname
673
# Install a dedicated importer for plugins requiring special handling
674
PluginImporter = _PluginImporter()
675
sys.meta_path.append(PluginImporter)
added
removed
bzrlib/plugin.py
