1
# Copyright (C) 2004, 2005 Canonical Ltd
3
# This program is free software; you can redistribute it and/or modify
4
# it under the terms of the GNU General Public License as published by
5
# the Free Software Foundation; either version 2 of the License, or
6
# (at your option) any later version.
8
# This program is distributed in the hope that it will be useful,
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11
# GNU General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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
35
from bzrlib.lazy_import import lazy_import
36
lazy_import(globals(), """
49
from bzrlib.trace import mutter, warning, log_exception_quietly
52
DEFAULT_PLUGIN_PATH = None
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):
72
def disable_plugins():
73
"""Disable loading plugins.
75
Future calls to load_plugins() will be ignored.
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
94
"""Load bzrlib plugins.
96
The environment variable BZR_PLUGIN_PATH is considered a delimited
97
set of paths to look through. Each entry is searched for *.py
98
files (and whatever other extensions are used in the platform,
101
load_from_dirs() provides the underlying mechanism and is called with
102
the default directory list to provide the normal behaviour.
106
# People can make sure plugins are loaded, they just won't be twice
110
# scan for all plugins in the path.
111
load_from_path(set_plugins_path())
114
def load_from_path(dirs):
115
"""Load bzrlib plugins found in each dir in dirs.
117
Loading a plugin means importing it into the python interpreter.
118
The plugin is expected to make calls to register commands when
119
it's loaded (or perhaps access other hooks in future.)
121
Plugins are loaded into bzrlib.plugins.NAME, and can be found there
122
for future reference.
124
The python module path for bzrlib.plugins will be modified to be 'dirs'.
126
plugins.__path__ = dirs
130
mutter('looking for plugins in %s', d)
134
# it might be a zip: try loading from the zip.
139
# backwards compatability: load_from_dirs was the old name
140
# This was changed in 0.15
141
load_from_dirs = load_from_path
144
def load_from_dir(d):
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]
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')]
172
if getattr(plugins, f, None):
173
mutter('Plugin name %s already loaded', f)
175
# mutter('add plugin name %s', f)
178
for name in plugin_names:
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
197
if '.zip' not in zip_name:
200
ziobj = zipimport.zipimporter(zip_name)
201
except zipimport.ZipImportError:
204
mutter('Looking for plugins in %r', zip_name)
208
# use zipfile to get list of files/dirs inside zip
209
z = zipfile.ZipFile(ziobj.archive)
210
namelist = z.namelist()
214
prefix = ziobj.prefix.replace('\\','/')
216
namelist = [name[ix:]
218
if name.startswith(prefix)]
220
mutter('Names in archive: %r', namelist)
222
for name in namelist:
223
if not name or name.endswith('/'):
226
# '/' is used to separate pathname components inside zip archives
229
head, tail = '', name
231
head, tail = name.rsplit('/',1)
233
# we don't need looking in subdirectories
236
base, suffix = osutils.splitext(tail)
237
if suffix not in valid_suffixes:
240
if base == '__init__':
251
if getattr(plugins, plugin_name, None):
252
mutter('Plugin name %s already loaded', plugin_name)
256
plugin = ziobj.load_module(plugin_name)
257
setattr(plugins, plugin_name, plugin)
258
mutter('Load plugin %s from zip %r', plugin_name, zip_name)
259
except zipimport.ZipImportError, e:
260
mutter('Unable to load plugin %r from %r: %s',
261
plugin_name, zip_name, str(e))
263
except KeyboardInterrupt:
266
## import pdb; pdb.set_trace()
267
warning('Unable to load plugin %r from %r'
269
log_exception_quietly()
added
removed
bzrlib/plugin.py
