20
20
When load_plugins() is invoked, any python module in any directory in
21
21
$BZR_PLUGIN_PATH will be imported. The module will be imported as
22
22
'bzrlib.plugins.$BASENAME(PLUGIN)'. In the plugin's main body, it should
23
update any bzrlib registries it wants to extend.
25
See the plugin-api developer documentation for information about writing
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
28
27
BZR_PLUGIN_PATH is also honoured for any plugins imported via
29
'import bzrlib.plugins.PLUGINNAME', as long as set_plugins_path has been
28
'import bzrlib.plugins.PLUGINNAME', as long as set_plugins_path has been
36
from bzrlib import osutils
38
35
from bzrlib.lazy_import import lazy_import
40
36
lazy_import(globals(), """
45
42
from bzrlib import (
46
_format_version_tuple,
52
from bzrlib import plugins as _mod_plugins
55
from bzrlib.symbol_versioning import (
49
from bzrlib.trace import mutter, warning, log_exception_quietly
61
52
DEFAULT_PLUGIN_PATH = None
63
_plugins_disabled = False
66
def are_plugins_disabled():
67
return _plugins_disabled
55
def get_default_plugin_path():
56
"""Get the DEFAULT_PLUGIN_PATH"""
57
global DEFAULT_PLUGIN_PATH
58
if DEFAULT_PLUGIN_PATH is None:
59
DEFAULT_PLUGIN_PATH = osutils.pathjoin(config.config_dir(), 'plugins')
60
return DEFAULT_PLUGIN_PATH
64
"""Return a dictionary of the plugins."""
66
for name, plugin in plugins.__dict__.items():
67
if isinstance(plugin, types.ModuleType):
70
72
def disable_plugins():
73
75
Future calls to load_plugins() will be ignored.
75
global _plugins_disabled
76
_plugins_disabled = True
80
def _strip_trailing_sep(path):
81
return path.rstrip("\\/")
84
def _get_specific_plugin_paths(paths):
85
"""Returns the plugin paths from a string describing the associations.
87
:param paths: A string describing the paths associated with the plugins.
89
:returns: A list of (plugin name, path) tuples.
91
For example, if paths is my_plugin@/test/my-test:her_plugin@/production/her,
92
[('my_plugin', '/test/my-test'), ('her_plugin', '/production/her')]
95
Note that ':' in the example above depends on the os.
100
for spec in paths.split(os.pathsep):
102
name, path = spec.split('@')
104
raise errors.BzrCommandError(
105
'"%s" is not a valid <plugin_name>@<plugin_path> description '
107
specs.append((name, path))
111
def set_plugins_path(path=None):
112
"""Set the path for plugins to be loaded from.
114
:param path: The list of paths to search for plugins. By default,
115
path will be determined using get_standard_plugins_path.
116
if path is [], no plugins can be loaded.
119
path = get_standard_plugins_path()
120
_mod_plugins.__path__ = path
121
PluginImporter.reset()
122
# Set up a blacklist for disabled plugins
123
disabled_plugins = os.environ.get('BZR_DISABLE_PLUGINS', None)
124
if disabled_plugins is not None:
125
for name in disabled_plugins.split(os.pathsep):
126
PluginImporter.blacklist.add('bzrlib.plugins.' + name)
127
# Set up a the specific paths for plugins
128
for plugin_name, plugin_path in _get_specific_plugin_paths(os.environ.get(
129
'BZR_PLUGINS_AT', None)):
130
PluginImporter.specific_paths[
131
'bzrlib.plugins.%s' % plugin_name] = plugin_path
77
# TODO: jam 20060131 This should probably also disable
83
def set_plugins_path():
84
"""Set the path for plugins to be loaded from."""
85
path = os.environ.get('BZR_PLUGIN_PATH',
86
get_default_plugin_path()).split(os.pathsep)
87
# search the plugin path before the bzrlib installed dir
88
path.append(os.path.dirname(plugins.__file__))
89
plugins.__path__ = path
135
def _append_new_path(paths, new_path):
136
"""Append a new path if it set and not already known."""
137
if new_path is not None and new_path not in paths:
138
paths.append(new_path)
142
def get_core_plugin_path():
144
bzr_exe = bool(getattr(sys, 'frozen', None))
145
if bzr_exe: # expand path for bzr.exe
146
# We need to use relative path to system-wide plugin
147
# directory because bzrlib from standalone bzr.exe
148
# could be imported by another standalone program
149
# (e.g. bzr-config; or TortoiseBzr/Olive if/when they
150
# will become standalone exe). [bialix 20071123]
151
# __file__ typically is
152
# C:\Program Files\Bazaar\lib\library.zip\bzrlib\plugin.pyc
153
# then plugins directory is
154
# C:\Program Files\Bazaar\plugins
155
# so relative path is ../../../plugins
156
core_path = osutils.abspath(osutils.pathjoin(
157
osutils.dirname(__file__), '../../../plugins'))
158
else: # don't look inside library.zip
159
# search the plugin path before the bzrlib installed dir
160
core_path = os.path.dirname(_mod_plugins.__file__)
164
def get_site_plugin_path():
165
"""Returns the path for the site installed plugins."""
166
if sys.platform == 'win32':
167
# We don't have (yet) a good answer for windows since that is certainly
168
# related to the way we build the installers. -- vila20090821
172
from distutils.sysconfig import get_python_lib
174
# If distutuils is not available, we just don't know where they are
177
site_path = osutils.pathjoin(get_python_lib(), 'bzrlib', 'plugins')
181
def get_user_plugin_path():
182
return osutils.pathjoin(config.config_dir(), 'plugins')
185
def get_standard_plugins_path():
186
"""Determine a plugin path suitable for general use."""
187
# Ad-Hoc default: core is not overriden by site but user can overrides both
188
# The rationale is that:
189
# - 'site' comes last, because these plugins should always be available and
190
# are supposed to be in sync with the bzr installed on site.
191
# - 'core' comes before 'site' so that running bzr from sources or a user
192
# installed version overrides the site version.
193
# - 'user' comes first, because... user is always right.
194
# - the above rules clearly defines which plugin version will be loaded if
195
# several exist. Yet, it is sometimes desirable to disable some directory
196
# so that a set of plugins is disabled as once. This can be done via
197
# -site, -core, -user.
199
env_paths = os.environ.get('BZR_PLUGIN_PATH', '+user').split(os.pathsep)
200
defaults = ['+core', '+site']
202
# The predefined references
203
refs = dict(core=get_core_plugin_path(),
204
site=get_site_plugin_path(),
205
user=get_user_plugin_path())
207
# Unset paths that should be removed
208
for k,v in refs.iteritems():
210
# defaults can never mention removing paths as that will make it
211
# impossible for the user to revoke these removals.
212
if removed in env_paths:
213
env_paths.remove(removed)
218
for p in env_paths + defaults:
219
if p.startswith('+'):
220
# Resolve references if they are known
224
# Leave them untouched so user can still use paths starting
227
_append_new_path(paths, p)
229
# Get rid of trailing slashes, since Python can't handle them when
230
# it tries to import modules.
231
paths = map(_strip_trailing_sep, paths)
235
def load_plugins(path=None):
236
94
"""Load bzrlib plugins.
238
96
The environment variable BZR_PLUGIN_PATH is considered a delimited
293
141
load_from_dirs = load_from_path
296
def _find_plugin_module(dir, name):
297
"""Check if there is a valid python module that can be loaded as a plugin.
299
:param dir: The directory where the search is performed.
300
:param path: An existing file path, either a python file or a package
303
:return: (name, path, description) name is the module name, path is the
304
file to load and description is the tuple returned by
307
path = osutils.pathjoin(dir, name)
308
if os.path.isdir(path):
309
# Check for a valid __init__.py file, valid suffixes depends on -O and
310
# can be .py, .pyc and .pyo
311
for suffix, mode, kind in imp.get_suffixes():
312
if kind not in (imp.PY_SOURCE, imp.PY_COMPILED):
313
# We don't recognize compiled modules (.so, .dll, etc)
315
init_path = osutils.pathjoin(path, '__init__' + suffix)
316
if os.path.isfile(init_path):
317
return name, init_path, (suffix, mode, kind)
319
for suffix, mode, kind in imp.get_suffixes():
320
if name.endswith(suffix):
321
# Clean up the module name
322
name = name[:-len(suffix)]
323
if kind == imp.C_EXTENSION and name.endswith('module'):
324
name = name[:-len('module')]
325
return name, path, (suffix, mode, kind)
326
# There is no python module here
327
return None, None, (None, None, None)
330
def _load_plugin_module(name, dir):
331
"""Load plugin name from dir.
333
:param name: The plugin name in the bzrlib.plugins namespace.
334
:param dir: The directory the plugin is loaded from for error messages.
336
if ('bzrlib.plugins.%s' % name) in PluginImporter.blacklist:
339
exec "import bzrlib.plugins.%s" % name in {}
340
except KeyboardInterrupt:
342
except errors.IncompatibleAPI, e:
343
trace.warning("Unable to load plugin %r. It requested API version "
344
"%s of module %s but the minimum exported version is %s, and "
345
"the maximum is %s" %
346
(name, e.wanted, e.api, e.minimum, e.current))
348
trace.warning("%s" % e)
349
if re.search('\.|-| ', name):
350
sanitised_name = re.sub('[-. ]', '_', name)
351
if sanitised_name.startswith('bzr_'):
352
sanitised_name = sanitised_name[len('bzr_'):]
353
trace.warning("Unable to load %r in %r as a plugin because the "
354
"file path isn't a valid module name; try renaming "
355
"it to %r." % (name, dir, sanitised_name))
357
trace.warning('Unable to load plugin %r from %r' % (name, dir))
358
trace.log_exception_quietly()
359
if 'error' in debug.debug_flags:
360
trace.print_exception(sys.exc_info(), sys.stderr)
363
144
def load_from_dir(d):
364
"""Load the plugins in directory d.
366
d must be in the plugins module path already.
367
This function is called once for each directory in the module path.
145
"""Load the plugins in directory d."""
146
# Get the list of valid python suffixes for __init__.py?
147
# this includes .py, .pyc, and .pyo (depending on if we are running -O)
148
# but it doesn't include compiled modules (.so, .dll, etc)
149
valid_suffixes = [suffix for suffix, mod_type, flags in imp.get_suffixes()
150
if flags in (imp.PY_SOURCE, imp.PY_COMPILED)]
151
package_entries = ['__init__'+suffix for suffix in valid_suffixes]
369
152
plugin_names = set()
370
for p in os.listdir(d):
371
name, path, desc = _find_plugin_module(d, p)
373
if name == '__init__':
374
# We do nothing with the __init__.py file in directories from
375
# the bzrlib.plugins module path, we may want to, one day
377
continue # We don't load __init__.py in the plugins dirs
378
elif getattr(_mod_plugins, name, None) is not None:
379
# The module has already been loaded from another directory
380
# during a previous call.
381
# FIXME: There should be a better way to report masked plugins
383
trace.mutter('Plugin name %s already loaded', name)
153
for f in os.listdir(d):
154
path = osutils.pathjoin(d, f)
155
if os.path.isdir(path):
156
for entry in package_entries:
157
# This directory should be a package, and thus added to
159
if os.path.isfile(osutils.pathjoin(path, entry)):
161
else: # This directory is not a package
164
for suffix_info in imp.get_suffixes():
165
if f.endswith(suffix_info[0]):
166
f = f[:-len(suffix_info[0])]
167
if suffix_info[2] == imp.C_EXTENSION and f.endswith('module'):
168
f = f[:-len('module')]
385
plugin_names.add(name)
172
if getattr(plugins, f, None):
173
mutter('Plugin name %s already loaded', f)
175
# mutter('add plugin name %s', f)
387
178
for name in plugin_names:
388
_load_plugin_module(name, d)
392
"""Return a dictionary of the plugins.
394
Each item in the dictionary is a PlugIn object.
397
for name, plugin in _mod_plugins.__dict__.items():
398
if isinstance(plugin, types.ModuleType):
399
result[name] = PlugIn(name, plugin)
180
exec "import bzrlib.plugins.%s" % name in {}
181
except KeyboardInterrupt:
184
## import pdb; pdb.set_trace()
185
if re.search('\.|-| ', name):
186
warning('Unable to load plugin %r from %r: '
187
'It is not a valid python module name.' % (name, d))
189
warning('Unable to load plugin %r from %r' % (name, d))
190
log_exception_quietly()
193
def load_from_zip(zip_name):
194
"""Load all the plugins in a zip."""
195
valid_suffixes = ('.py', '.pyc', '.pyo') # only python modules/packages
199
index = zip_name.rindex('.zip')
202
archive = zip_name[:index+4]
203
prefix = zip_name[index+5:]
205
mutter('Looking for plugins in %r', zip_name)
207
# use zipfile to get list of files/dirs inside zip
209
z = zipfile.ZipFile(archive)
210
namelist = z.namelist()
212
except zipfile.error:
217
prefix = prefix.replace('\\','/')
218
if prefix[-1] != '/':
221
namelist = [name[ix:]
223
if name.startswith(prefix)]
225
mutter('Names in archive: %r', namelist)
227
for name in namelist:
228
if not name or name.endswith('/'):
231
# '/' is used to separate pathname components inside zip archives
234
head, tail = '', name
236
head, tail = name.rsplit('/',1)
238
# we don't need looking in subdirectories
241
base, suffix = osutils.splitext(tail)
242
if suffix not in valid_suffixes:
245
if base == '__init__':
256
if getattr(plugins, plugin_name, None):
257
mutter('Plugin name %s already loaded', plugin_name)
261
exec "import bzrlib.plugins.%s" % plugin_name in {}
262
mutter('Load plugin %s from zip %r', plugin_name, zip_name)
263
except KeyboardInterrupt:
266
## import pdb; pdb.set_trace()
267
warning('Unable to load plugin %r from %r'
269
log_exception_quietly()
403
272
class PluginsHelpIndex(object):
466
335
def get_help_topic(self):
467
336
"""Return the modules help topic - its __name__ after bzrlib.plugins.."""
468
337
return self.module.__name__[len('bzrlib.plugins.'):]
471
class PlugIn(object):
472
"""The bzrlib representation of a plugin.
474
The PlugIn object provides a way to manipulate a given plugin module.
477
def __init__(self, name, module):
478
"""Construct a plugin for module."""
483
"""Get the path that this plugin was loaded from."""
484
if getattr(self.module, '__path__', None) is not None:
485
return os.path.abspath(self.module.__path__[0])
486
elif getattr(self.module, '__file__', None) is not None:
487
path = os.path.abspath(self.module.__file__)
488
if path[-4:] in ('.pyc', '.pyo'):
489
pypath = path[:-4] + '.py'
490
if os.path.isfile(pypath):
494
return repr(self.module)
497
return "<%s.%s object at %s, name=%s, module=%s>" % (
498
self.__class__.__module__, self.__class__.__name__, id(self),
499
self.name, self.module)
503
def test_suite(self):
504
"""Return the plugin's test suite."""
505
if getattr(self.module, 'test_suite', None) is not None:
506
return self.module.test_suite()
510
def load_plugin_tests(self, loader):
511
"""Return the adapted plugin's test suite.
513
:param loader: The custom loader that should be used to load additional
517
if getattr(self.module, 'load_tests', None) is not None:
518
return loader.loadTestsFromModule(self.module)
522
def version_info(self):
523
"""Return the plugin's version_tuple or None if unknown."""
524
version_info = getattr(self.module, 'version_info', None)
525
if version_info is not None:
527
if isinstance(version_info, types.StringType):
528
version_info = version_info.split('.')
529
elif len(version_info) == 3:
530
version_info = tuple(version_info) + ('final', 0)
532
# The given version_info isn't even iteratible
533
trace.log_exception_quietly()
534
version_info = (version_info,)
537
def _get__version__(self):
538
version_info = self.version_info()
539
if version_info is None or len(version_info) == 0:
542
version_string = _format_version_tuple(version_info)
543
except (ValueError, TypeError, IndexError), e:
544
trace.log_exception_quietly()
545
# try to return something usefull for bad plugins, in stead of
547
version_string = '.'.join(map(str, version_info))
548
return version_string
550
__version__ = property(_get__version__)
553
class _PluginImporter(object):
554
"""An importer tailored to bzr specific needs.
556
This is a singleton that takes care of:
557
- disabled plugins specified in 'blacklist',
558
- plugins that needs to be loaded from specific directories.
565
self.blacklist = set()
566
self.specific_paths = {}
568
def find_module(self, fullname, parent_path=None):
569
"""Search a plugin module.
571
Disabled plugins raise an import error, plugins with specific paths
572
returns a specific loader.
574
:return: None if the plugin doesn't need special handling, self
577
if not fullname.startswith('bzrlib.plugins.'):
579
if fullname in self.blacklist:
580
raise ImportError('%s is disabled' % fullname)
581
if fullname in self.specific_paths:
585
def load_module(self, fullname):
586
"""Load a plugin from a specific directory."""
587
# We are called only for specific paths
588
plugin_path = self.specific_paths[fullname]
590
if os.path.isdir(plugin_path):
591
for suffix, mode, kind in imp.get_suffixes():
592
if kind not in (imp.PY_SOURCE, imp.PY_COMPILED):
593
# We don't recognize compiled modules (.so, .dll, etc)
595
init_path = osutils.pathjoin(plugin_path, '__init__' + suffix)
596
if os.path.isfile(init_path):
597
# We've got a module here and load_module needs specific
599
loading_path = plugin_path
602
kind = imp.PKG_DIRECTORY
605
for suffix, mode, kind in imp.get_suffixes():
606
if plugin_path.endswith(suffix):
607
loading_path = plugin_path
609
if loading_path is None:
610
raise ImportError('%s cannot be loaded from %s'
611
% (fullname, plugin_path))
612
if kind is imp.PKG_DIRECTORY:
615
f = open(loading_path, mode)
617
mod = imp.load_module(fullname, f, loading_path,
618
(suffix, mode, kind))
619
mod.__package__ = fullname
626
# Install a dedicated importer for plugins requiring special handling
627
PluginImporter = _PluginImporter()
628
sys.meta_path.append(PluginImporter)
added
removed
bzrlib/plugin.py
