mirror of
https://github.com/facebook/sapling.git
synced 2024-10-11 01:07:15 +03:00
845426bfe6
This was introduced way back in 2006 (rev e8e3582d6f80) as sys.exit(0) if loading an extension failed when --traceback was on, then at some point morphed into a 'return 1' in a function that otherwise returns nothing. At this point, if ui.traceback is enabled and if loading an extension fails for whatever reason, including one as innocent as it not being present, we leave any extensions loaded so far in a bogus half-initialized state. That doesn't really make any sense.
381 lines
11 KiB
Python
381 lines
11 KiB
Python
# extensions.py - extension handling for mercurial
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#
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# Copyright 2005-2007 Matt Mackall <mpm@selenic.com>
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#
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# This software may be used and distributed according to the terms of the
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# GNU General Public License version 2 or any later version.
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import imp, os
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import util, cmdutil, error
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from i18n import _, gettext
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_extensions = {}
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_order = []
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_ignore = ['hbisect', 'bookmarks', 'parentrevspec', 'interhg', 'inotify']
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def extensions(ui=None):
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if ui:
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def enabled(name):
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for format in ['%s', 'hgext.%s']:
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conf = ui.config('extensions', format % name)
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if conf is not None and not conf.startswith('!'):
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return True
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else:
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enabled = lambda name: True
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for name in _order:
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module = _extensions[name]
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if module and enabled(name):
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yield name, module
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def find(name):
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'''return module with given extension name'''
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mod = None
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try:
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mod = _extensions[name]
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except KeyError:
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for k, v in _extensions.iteritems():
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if k.endswith('.' + name) or k.endswith('/' + name):
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mod = v
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break
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if not mod:
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raise KeyError(name)
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return mod
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def loadpath(path, module_name):
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module_name = module_name.replace('.', '_')
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path = util.normpath(util.expandpath(path))
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if os.path.isdir(path):
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# module/__init__.py style
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d, f = os.path.split(path)
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fd, fpath, desc = imp.find_module(f, [d])
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return imp.load_module(module_name, fd, fpath, desc)
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else:
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try:
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return imp.load_source(module_name, path)
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except IOError, exc:
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if not exc.filename:
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exc.filename = path # python does not fill this
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raise
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def load(ui, name, path):
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if name.startswith('hgext.') or name.startswith('hgext/'):
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shortname = name[6:]
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else:
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shortname = name
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if shortname in _ignore:
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return None
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if shortname in _extensions:
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return _extensions[shortname]
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_extensions[shortname] = None
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if path:
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# the module will be loaded in sys.modules
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# choose an unique name so that it doesn't
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# conflicts with other modules
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mod = loadpath(path, 'hgext.%s' % name)
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else:
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def importh(name):
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mod = __import__(name)
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components = name.split('.')
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for comp in components[1:]:
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mod = getattr(mod, comp)
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return mod
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try:
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mod = importh("hgext.%s" % name)
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except ImportError, err:
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ui.debug('could not import hgext.%s (%s): trying %s\n'
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% (name, err, name))
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mod = importh(name)
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_extensions[shortname] = mod
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_order.append(shortname)
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return mod
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def loadall(ui):
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result = ui.configitems("extensions")
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newindex = len(_order)
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for (name, path) in result:
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if path:
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if path[0] == '!':
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continue
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try:
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load(ui, name, path)
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except KeyboardInterrupt:
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raise
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except Exception, inst:
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if path:
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ui.warn(_("*** failed to import extension %s from %s: %s\n")
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% (name, path, inst))
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else:
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ui.warn(_("*** failed to import extension %s: %s\n")
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% (name, inst))
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for name in _order[newindex:]:
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uisetup = getattr(_extensions[name], 'uisetup', None)
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if uisetup:
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uisetup(ui)
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for name in _order[newindex:]:
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extsetup = getattr(_extensions[name], 'extsetup', None)
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if extsetup:
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try:
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extsetup(ui)
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except TypeError:
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if extsetup.func_code.co_argcount != 0:
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raise
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extsetup() # old extsetup with no ui argument
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def wrapcommand(table, command, wrapper):
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'''Wrap the command named `command' in table
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Replace command in the command table with wrapper. The wrapped command will
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be inserted into the command table specified by the table argument.
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The wrapper will be called like
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wrapper(orig, *args, **kwargs)
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where orig is the original (wrapped) function, and *args, **kwargs
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are the arguments passed to it.
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'''
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assert callable(wrapper)
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aliases, entry = cmdutil.findcmd(command, table)
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for alias, e in table.iteritems():
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if e is entry:
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key = alias
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break
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origfn = entry[0]
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def wrap(*args, **kwargs):
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return util.checksignature(wrapper)(
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util.checksignature(origfn), *args, **kwargs)
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wrap.__doc__ = getattr(origfn, '__doc__')
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wrap.__module__ = getattr(origfn, '__module__')
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newentry = list(entry)
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newentry[0] = wrap
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table[key] = tuple(newentry)
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return entry
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def wrapfunction(container, funcname, wrapper):
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'''Wrap the function named funcname in container
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Replace the funcname member in the given container with the specified
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wrapper. The container is typically a module, class, or instance.
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The wrapper will be called like
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wrapper(orig, *args, **kwargs)
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where orig is the original (wrapped) function, and *args, **kwargs
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are the arguments passed to it.
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Wrapping methods of the repository object is not recommended since
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it conflicts with extensions that extend the repository by
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subclassing. All extensions that need to extend methods of
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localrepository should use this subclassing trick: namely,
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reposetup() should look like
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def reposetup(ui, repo):
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class myrepo(repo.__class__):
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def whatever(self, *args, **kwargs):
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[...extension stuff...]
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super(myrepo, self).whatever(*args, **kwargs)
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[...extension stuff...]
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repo.__class__ = myrepo
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In general, combining wrapfunction() with subclassing does not
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work. Since you cannot control what other extensions are loaded by
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your end users, you should play nicely with others by using the
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subclass trick.
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'''
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assert callable(wrapper)
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def wrap(*args, **kwargs):
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return wrapper(origfn, *args, **kwargs)
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origfn = getattr(container, funcname)
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assert callable(origfn)
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setattr(container, funcname, wrap)
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return origfn
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def _disabledpaths(strip_init=False):
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'''find paths of disabled extensions. returns a dict of {name: path}
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removes /__init__.py from packages if strip_init is True'''
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import hgext
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extpath = os.path.dirname(os.path.abspath(hgext.__file__))
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try: # might not be a filesystem path
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files = os.listdir(extpath)
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except OSError:
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return {}
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exts = {}
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for e in files:
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if e.endswith('.py'):
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name = e.rsplit('.', 1)[0]
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path = os.path.join(extpath, e)
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else:
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name = e
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path = os.path.join(extpath, e, '__init__.py')
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if not os.path.exists(path):
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continue
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if strip_init:
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path = os.path.dirname(path)
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if name in exts or name in _order or name == '__init__':
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continue
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exts[name] = path
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return exts
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def _moduledoc(file):
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'''return the top-level python documentation for the given file
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Loosely inspired by pydoc.source_synopsis(), but rewritten to
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handle triple quotes and to return the whole text instead of just
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the synopsis'''
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result = []
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line = file.readline()
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while line[:1] == '#' or not line.strip():
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line = file.readline()
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if not line:
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break
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start = line[:3]
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if start == '"""' or start == "'''":
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line = line[3:]
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while line:
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if line.rstrip().endswith(start):
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line = line.split(start)[0]
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if line:
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result.append(line)
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break
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elif not line:
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return None # unmatched delimiter
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result.append(line)
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line = file.readline()
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else:
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return None
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return ''.join(result)
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def _disabledhelp(path):
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'''retrieve help synopsis of a disabled extension (without importing)'''
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try:
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file = open(path)
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except IOError:
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return
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else:
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doc = _moduledoc(file)
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file.close()
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if doc: # extracting localized synopsis
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return gettext(doc).splitlines()[0]
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else:
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return _('(no help text available)')
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def disabled():
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'''find disabled extensions from hgext. returns a dict of {name: desc}'''
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try:
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from hgext import __index__
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return dict((name, gettext(desc))
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for name, desc in __index__.docs.iteritems()
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if name not in _order)
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except (ImportError, AttributeError):
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pass
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paths = _disabledpaths()
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if not paths:
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return {}
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exts = {}
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for name, path in paths.iteritems():
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doc = _disabledhelp(path)
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if doc:
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exts[name] = doc
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return exts
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def disabledext(name):
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'''find a specific disabled extension from hgext. returns desc'''
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try:
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from hgext import __index__
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if name in _order: # enabled
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return
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else:
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return gettext(__index__.docs.get(name))
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except (ImportError, AttributeError):
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pass
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paths = _disabledpaths()
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if name in paths:
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return _disabledhelp(paths[name])
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def disabledcmd(ui, cmd, strict=False):
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'''import disabled extensions until cmd is found.
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returns (cmdname, extname, module)'''
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paths = _disabledpaths(strip_init=True)
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if not paths:
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raise error.UnknownCommand(cmd)
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def findcmd(cmd, name, path):
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try:
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mod = loadpath(path, 'hgext.%s' % name)
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except Exception:
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return
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try:
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aliases, entry = cmdutil.findcmd(cmd,
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getattr(mod, 'cmdtable', {}), strict)
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except (error.AmbiguousCommand, error.UnknownCommand):
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return
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except Exception:
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ui.warn(_('warning: error finding commands in %s\n') % path)
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ui.traceback()
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return
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for c in aliases:
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if c.startswith(cmd):
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cmd = c
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break
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else:
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cmd = aliases[0]
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return (cmd, name, mod)
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ext = None
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# first, search for an extension with the same name as the command
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path = paths.pop(cmd, None)
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if path:
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ext = findcmd(cmd, cmd, path)
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if not ext:
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# otherwise, interrogate each extension until there's a match
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for name, path in paths.iteritems():
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ext = findcmd(cmd, name, path)
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if ext:
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break
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if ext and 'DEPRECATED' not in ext.__doc__:
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return ext
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raise error.UnknownCommand(cmd)
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def enabled(shortname=True):
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'''return a dict of {name: desc} of extensions'''
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exts = {}
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for ename, ext in extensions():
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doc = (gettext(ext.__doc__) or _('(no help text available)'))
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if shortname:
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ename = ename.split('.')[-1]
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exts[ename] = doc.splitlines()[0].strip()
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return exts
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def moduleversion(module):
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'''return version information from given module as a string'''
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if (util.safehasattr(module, 'getversion')
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and callable(module.getversion)):
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version = module.getversion()
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elif util.safehasattr(module, '__version__'):
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version = module.__version__
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else:
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version = ''
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if isinstance(version, (list, tuple)):
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version = '.'.join(str(o) for o in version)
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return version
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