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.
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.
18
# This module implements plug-in support.
19
# Any python module in $BZR_PLUGIN_PATH will be imported upon initialization
20
# of bzrlib (and then forgotten about). In the plugin's main body, it should
21
# update any bzrlib registries it wants to extend; for example, to add new
22
# commands, import bzrlib.commands and add your new command to the
23
# plugin_cmds variable.
48
28
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
54
29
DEFAULT_PLUGIN_PATH = os.path.join(config_dir(), 'plugins')
60
"""Return a dictionary of the plugins."""
62
for name, plugin in bzrlib.plugins.__dict__.items():
63
if isinstance(plugin, types.ModuleType):
68
35
def load_plugins():
69
"""Load bzrlib plugins.
37
Find all python plugins and load them.
39
Loading a plugin means importing it into the python interpreter.
40
The plugin is expected to make calls to register commands when
41
it's loaded (or perhaps access other hooks in future.)
43
A list of plugs is stored in bzrlib.plugin.all_plugins for future
71
46
The environment variable BZR_PLUGIN_PATH is considered a delimited
72
47
set of paths to look through. Each entry is searched for *.py
73
48
files (and whatever other extensions are used in the platform,
76
load_from_dirs() provides the underlying mechanism and is called with
77
the default directory list to provide the normal behaviour.
52
global all_plugins, _loaded
81
54
# People can make sure plugins are loaded, they just won't be twice
83
56
#raise BzrError("plugins already initialized")
86
dirs = os.environ.get('BZR_PLUGIN_PATH', DEFAULT_PLUGIN_PATH).split(os.pathsep)
61
from bzrlib.trace import log_error, mutter, log_exception
62
from bzrlib.errors import BzrError
63
from bzrlib import plugins
65
dirs = os.environ.get('BZR_PLUGIN_PATH', DEFAULT_PLUGIN_PATH).split(":")
87
66
dirs.insert(0, os.path.dirname(plugins.__file__))
92
def load_from_dirs(dirs):
93
"""Load bzrlib plugins found in each dir in dirs.
95
Loading a plugin means importing it into the python interpreter.
96
The plugin is expected to make calls to register commands when
97
it's loaded (or perhaps access other hooks in future.)
99
Plugins are loaded into bzrlib.plugins.NAME, and can be found there
100
for future reference.
102
68
# The problem with imp.get_suffixes() is that it doesn't include
103
69
# .pyo which is technically valid
104
70
# It also means that "testmodule.so" will show up as both test and testmodule
136
if getattr(bzrlib.plugins, f, None):
137
mutter('Plugin name %s already loaded', f)
139
mutter('add plugin name %s', f)
104
mutter('add plugin name %s' % f)
142
107
plugin_names = list(plugin_names)
143
108
plugin_names.sort()
144
109
for name in plugin_names:
146
111
plugin_info = imp.find_module(name, [d])
147
mutter('load plugin %r', plugin_info)
112
mutter('load plugin %r' % (plugin_info,))
149
114
plugin = imp.load_module('bzrlib.plugins.' + name,
116
all_plugins.append(plugin)
151
117
setattr(bzrlib.plugins, name, plugin)
153
119
if plugin_info[0] is not None:
154
120
plugin_info[0].close()
156
122
mutter('loaded succesfully')
157
except KeyboardInterrupt:
160
## import pdb; pdb.set_trace()
161
warning('Unable to load plugin %r from %r' % (name, d))
162
log_exception_quietly()
124
log_error('Unable to load plugin %r from %r' % (name, d))