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# 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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from __future__ import absolute_import
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import imp
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import inspect
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import os
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from .i18n import (
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_,
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gettext,
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)
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from . import (
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cmdutil,
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configitems,
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error,
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pycompat,
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util,
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)
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_extensions = {}
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_disabledextensions = {}
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_aftercallbacks = {}
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_order = []
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_builtin = {
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'hbisect',
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'bookmarks',
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'color',
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'parentrevspec',
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'progress',
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'interhg',
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'inotify',
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'hgcia'
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}
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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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module_name = pycompat.fsdecode(module_name)
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path = pycompat.fsdecode(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 as 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 _importh(name):
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"""import and return the <name> module"""
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mod = __import__(pycompat.sysstr(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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def _importext(name, path=None, reportfunc=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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try:
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mod = _importh("hgext.%s" % name)
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except ImportError as err:
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if reportfunc:
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reportfunc(err, "hgext.%s" % name, "hgext3rd.%s" % name)
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try:
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mod = _importh("hgext3rd.%s" % name)
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except ImportError as err:
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if reportfunc:
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reportfunc(err, "hgext3rd.%s" % name, name)
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mod = _importh(name)
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return mod
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def _reportimporterror(ui, err, failed, next):
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# note: this ui.debug happens before --debug is processed,
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# Use --config ui.debug=1 to see them.
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ui.debug('could not import %s (%s): trying %s\n'
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% (failed, util.forcebytestr(err), next))
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if ui.debugflag:
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ui.traceback()
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# attributes set by registrar.command
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_cmdfuncattrs = ('norepo', 'optionalrepo', 'inferrepo')
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def _validatecmdtable(ui, cmdtable):
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"""Check if extension commands have required attributes"""
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for c, e in cmdtable.iteritems():
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f = e[0]
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if getattr(f, '_deprecatedregistrar', False):
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ui.deprecwarn("cmdutil.command is deprecated, use "
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"registrar.command to register '%s'" % c, '4.6')
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missing = [a for a in _cmdfuncattrs if not util.safehasattr(f, a)]
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if not missing:
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continue
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raise error.ProgrammingError(
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'missing attributes: %s' % ', '.join(missing),
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hint="use @command decorator to register '%s'" % c)
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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 _builtin:
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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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mod = _importext(name, path, bind(_reportimporterror, ui))
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# Before we do anything with the extension, check against minimum stated
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# compatibility. This gives extension authors a mechanism to have their
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# extensions short circuit when loaded with a known incompatible version
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# of Mercurial.
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minver = getattr(mod, 'minimumhgversion', None)
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if minver and util.versiontuple(minver, 2) > util.versiontuple(n=2):
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ui.warn(_('(third party extension %s requires version %s or newer '
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'of Mercurial; disabling)\n') % (shortname, minver))
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return
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_validatecmdtable(ui, getattr(mod, 'cmdtable', {}))
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_extensions[shortname] = mod
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_order.append(shortname)
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for fn in _aftercallbacks.get(shortname, []):
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fn(loaded=True)
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return mod
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def _runuisetup(name, ui):
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uisetup = getattr(_extensions[name], 'uisetup', None)
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if uisetup:
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try:
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uisetup(ui)
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except Exception as inst:
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ui.traceback()
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msg = util.forcebytestr(inst)
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ui.warn(_("*** failed to set up extension %s: %s\n") % (name, msg))
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return False
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return True
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def _runextsetup(name, ui):
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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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try:
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extsetup(ui)
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except TypeError:
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# Try to use getfullargspec (Python 3) first, and fall
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# back to getargspec only if it doesn't exist so as to
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# avoid warnings.
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if getattr(inspect, 'getfullargspec',
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getattr(inspect, 'getargspec'))(extsetup).args:
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raise
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extsetup() # old extsetup with no ui argument
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except Exception as inst:
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ui.traceback()
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msg = util.forcebytestr(inst)
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ui.warn(_("*** failed to set up extension %s: %s\n") % (name, msg))
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return False
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return True
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def loadall(ui, whitelist=None):
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result = ui.configitems("extensions")
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if whitelist is not None:
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result = [(k, v) for (k, v) in result if k in whitelist]
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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[0:1] == '!':
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_disabledextensions[name] = path[1:]
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continue
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try:
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load(ui, name, path)
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except Exception as inst:
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msg = util.forcebytestr(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, msg))
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else:
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ui.warn(_("*** failed to import extension %s: %s\n")
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% (name, msg))
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if isinstance(inst, error.Hint) and inst.hint:
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ui.warn(_("*** (%s)\n") % inst.hint)
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ui.traceback()
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broken = set()
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for name in _order[newindex:]:
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if not _runuisetup(name, ui):
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broken.add(name)
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for name in _order[newindex:]:
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if name in broken:
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continue
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if not _runextsetup(name, ui):
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broken.add(name)
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for name in broken:
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_extensions[name] = None
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# Call aftercallbacks that were never met.
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for shortname in _aftercallbacks:
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if shortname in _extensions:
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continue
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for fn in _aftercallbacks[shortname]:
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fn(loaded=False)
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# loadall() is called multiple times and lingering _aftercallbacks
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# entries could result in double execution. See issue4646.
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_aftercallbacks.clear()
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# delay importing avoids cyclic dependency (especially commands)
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from . import (
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color,
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commands,
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filemerge,
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fileset,
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revset,
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templatefilters,
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templatekw,
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templater,
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)
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# list of (objname, loadermod, loadername) tuple:
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# - objname is the name of an object in extension module,
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# from which extra information is loaded
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# - loadermod is the module where loader is placed
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# - loadername is the name of the function,
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# which takes (ui, extensionname, extraobj) arguments
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extraloaders = [
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('cmdtable', commands, 'loadcmdtable'),
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('colortable', color, 'loadcolortable'),
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('configtable', configitems, 'loadconfigtable'),
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('filesetpredicate', fileset, 'loadpredicate'),
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('internalmerge', filemerge, 'loadinternalmerge'),
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('revsetpredicate', revset, 'loadpredicate'),
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('templatefilter', templatefilters, 'loadfilter'),
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('templatefunc', templater, 'loadfunction'),
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('templatekeyword', templatekw, 'loadkeyword'),
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]
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for name in _order[newindex:]:
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module = _extensions[name]
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if not module:
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continue # loading this module failed
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for objname, loadermod, loadername in extraloaders:
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extraobj = getattr(module, objname, None)
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if extraobj is not None:
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getattr(loadermod, loadername)(ui, name, extraobj)
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def afterloaded(extension, callback):
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'''Run the specified function after a named extension is loaded.
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If the named extension is already loaded, the callback will be called
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immediately.
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If the named extension never loads, the callback will be called after
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all extensions have been loaded.
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The callback receives the named argument ``loaded``, which is a boolean
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indicating whether the dependent extension actually loaded.
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'''
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if extension in _extensions:
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# Report loaded as False if the extension is disabled
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loaded = (_extensions[extension] is not None)
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callback(loaded=loaded)
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else:
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_aftercallbacks.setdefault(extension, []).append(callback)
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def bind(func, *args):
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'''Partial function application
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Returns a new function that is the partial application of args and kwargs
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to func. For example,
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f(1, 2, bar=3) === bind(f, 1)(2, bar=3)'''
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assert callable(func)
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def closure(*a, **kw):
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return func(*(args + a), **kw)
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return closure
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def _updatewrapper(wrap, origfn, unboundwrapper):
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'''Copy and add some useful attributes to wrapper'''
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wrap.__module__ = getattr(origfn, '__module__')
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wrap.__doc__ = getattr(origfn, '__doc__')
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wrap.__dict__.update(getattr(origfn, '__dict__', {}))
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wrap._origfunc = origfn
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wrap._unboundwrapper = unboundwrapper
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def wrapcommand(table, command, wrapper, synopsis=None, docstring=None):
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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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Optionally append to the command synopsis and docstring, used for help.
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For example, if your extension wraps the ``bookmarks`` command to add the
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flags ``--remote`` and ``--all`` you might call this function like so:
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synopsis = ' [-a] [--remote]'
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docstring = """
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The ``remotenames`` extension adds the ``--remote`` and ``--all`` (``-a``)
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flags to the bookmarks command. Either flag will show the remote bookmarks
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known to the repository; ``--remote`` will also suppress the output of the
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local bookmarks.
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"""
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extensions.wrapcommand(commands.table, 'bookmarks', exbookmarks,
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synopsis, docstring)
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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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wrap = bind(util.checksignature(wrapper), util.checksignature(origfn))
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_updatewrapper(wrap, origfn, wrapper)
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if docstring is not None:
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wrap.__doc__ += docstring
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newentry = list(entry)
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newentry[0] = wrap
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if synopsis is not None:
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newentry[2] += synopsis
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table[key] = tuple(newentry)
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return entry
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def wrapfilecache(cls, propname, wrapper):
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"""Wraps a filecache property.
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These can't be wrapped using the normal wrapfunction.
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"""
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propname = pycompat.sysstr(propname)
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assert callable(wrapper)
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for currcls in cls.__mro__:
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if propname in currcls.__dict__:
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origfn = currcls.__dict__[propname].func
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assert callable(origfn)
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def wrap(*args, **kwargs):
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return wrapper(origfn, *args, **kwargs)
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currcls.__dict__[propname].func = wrap
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break
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if currcls is object:
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raise AttributeError(r"type '%s' has no property '%s'" % (
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cls, propname))
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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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origfn = getattr(container, funcname)
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assert callable(origfn)
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wrap = bind(wrapper, origfn)
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_updatewrapper(wrap, origfn, wrapper)
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setattr(container, funcname, wrap)
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return origfn
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def unwrapfunction(container, funcname, wrapper=None):
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'''undo wrapfunction
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If wrappers is None, undo the last wrap. Otherwise removes the wrapper
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from the chain of wrappers.
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|
|
Return the removed wrapper.
|
|
|
Raise IndexError if wrapper is None and nothing to unwrap; ValueError if
|
|
|
wrapper is not None but is not found in the wrapper chain.
|
|
|
'''
|
|
|
chain = getwrapperchain(container, funcname)
|
|
|
origfn = chain.pop()
|
|
|
if wrapper is None:
|
|
|
wrapper = chain[0]
|
|
|
chain.remove(wrapper)
|
|
|
setattr(container, funcname, origfn)
|
|
|
for w in reversed(chain):
|
|
|
wrapfunction(container, funcname, w)
|
|
|
return wrapper
|
|
|
|
|
|
def getwrapperchain(container, funcname):
|
|
|
'''get a chain of wrappers of a function
|
|
|
|
|
|
Return a list of functions: [newest wrapper, ..., oldest wrapper, origfunc]
|
|
|
|
|
|
The wrapper functions are the ones passed to wrapfunction, whose first
|
|
|
argument is origfunc.
|
|
|
'''
|
|
|
result = []
|
|
|
fn = getattr(container, funcname)
|
|
|
while fn:
|
|
|
assert callable(fn)
|
|
|
result.append(getattr(fn, '_unboundwrapper', fn))
|
|
|
fn = getattr(fn, '_origfunc', None)
|
|
|
return result
|
|
|
|
|
|
def _disabledpaths(strip_init=False):
|
|
|
'''find paths of disabled extensions. returns a dict of {name: path}
|
|
|
removes /__init__.py from packages if strip_init is True'''
|
|
|
import hgext
|
|
|
extpath = os.path.dirname(
|
|
|
os.path.abspath(pycompat.fsencode(hgext.__file__)))
|
|
|
try: # might not be a filesystem path
|
|
|
files = os.listdir(extpath)
|
|
|
except OSError:
|
|
|
return {}
|
|
|
|
|
|
exts = {}
|
|
|
for e in files:
|
|
|
if e.endswith('.py'):
|
|
|
name = e.rsplit('.', 1)[0]
|
|
|
path = os.path.join(extpath, e)
|
|
|
else:
|
|
|
name = e
|
|
|
path = os.path.join(extpath, e, '__init__.py')
|
|
|
if not os.path.exists(path):
|
|
|
continue
|
|
|
if strip_init:
|
|
|
path = os.path.dirname(path)
|
|
|
if name in exts or name in _order or name == '__init__':
|
|
|
continue
|
|
|
exts[name] = path
|
|
|
for name, path in _disabledextensions.iteritems():
|
|
|
# If no path was provided for a disabled extension (e.g. "color=!"),
|
|
|
# don't replace the path we already found by the scan above.
|
|
|
if path:
|
|
|
exts[name] = path
|
|
|
return exts
|
|
|
|
|
|
def _moduledoc(file):
|
|
|
'''return the top-level python documentation for the given file
|
|
|
|
|
|
Loosely inspired by pydoc.source_synopsis(), but rewritten to
|
|
|
handle triple quotes and to return the whole text instead of just
|
|
|
the synopsis'''
|
|
|
result = []
|
|
|
|
|
|
line = file.readline()
|
|
|
while line[:1] == '#' or not line.strip():
|
|
|
line = file.readline()
|
|
|
if not line:
|
|
|
break
|
|
|
|
|
|
start = line[:3]
|
|
|
if start == '"""' or start == "'''":
|
|
|
line = line[3:]
|
|
|
while line:
|
|
|
if line.rstrip().endswith(start):
|
|
|
line = line.split(start)[0]
|
|
|
if line:
|
|
|
result.append(line)
|
|
|
break
|
|
|
elif not line:
|
|
|
return None # unmatched delimiter
|
|
|
result.append(line)
|
|
|
line = file.readline()
|
|
|
else:
|
|
|
return None
|
|
|
|
|
|
return ''.join(result)
|
|
|
|
|
|
def _disabledhelp(path):
|
|
|
'''retrieve help synopsis of a disabled extension (without importing)'''
|
|
|
try:
|
|
|
file = open(path)
|
|
|
except IOError:
|
|
|
return
|
|
|
else:
|
|
|
doc = _moduledoc(file)
|
|
|
file.close()
|
|
|
|
|
|
if doc: # extracting localized synopsis
|
|
|
return gettext(doc)
|
|
|
else:
|
|
|
return _('(no help text available)')
|
|
|
|
|
|
def disabled():
|
|
|
'''find disabled extensions from hgext. returns a dict of {name: desc}'''
|
|
|
try:
|
|
|
from hgext import __index__
|
|
|
return dict((name, gettext(desc))
|
|
|
for name, desc in __index__.docs.iteritems()
|
|
|
if name not in _order)
|
|
|
except (ImportError, AttributeError):
|
|
|
pass
|
|
|
|
|
|
paths = _disabledpaths()
|
|
|
if not paths:
|
|
|
return {}
|
|
|
|
|
|
exts = {}
|
|
|
for name, path in paths.iteritems():
|
|
|
doc = _disabledhelp(path)
|
|
|
if doc:
|
|
|
exts[name] = doc.splitlines()[0]
|
|
|
|
|
|
return exts
|
|
|
|
|
|
def disabledext(name):
|
|
|
'''find a specific disabled extension from hgext. returns desc'''
|
|
|
try:
|
|
|
from hgext import __index__
|
|
|
if name in _order: # enabled
|
|
|
return
|
|
|
else:
|
|
|
return gettext(__index__.docs.get(name))
|
|
|
except (ImportError, AttributeError):
|
|
|
pass
|
|
|
|
|
|
paths = _disabledpaths()
|
|
|
if name in paths:
|
|
|
return _disabledhelp(paths[name])
|
|
|
|
|
|
def disabledcmd(ui, cmd, strict=False):
|
|
|
'''import disabled extensions until cmd is found.
|
|
|
returns (cmdname, extname, module)'''
|
|
|
|
|
|
paths = _disabledpaths(strip_init=True)
|
|
|
if not paths:
|
|
|
raise error.UnknownCommand(cmd)
|
|
|
|
|
|
def findcmd(cmd, name, path):
|
|
|
try:
|
|
|
mod = loadpath(path, 'hgext.%s' % name)
|
|
|
except Exception:
|
|
|
return
|
|
|
try:
|
|
|
aliases, entry = cmdutil.findcmd(cmd,
|
|
|
getattr(mod, 'cmdtable', {}), strict)
|
|
|
except (error.AmbiguousCommand, error.UnknownCommand):
|
|
|
return
|
|
|
except Exception:
|
|
|
ui.warn(_('warning: error finding commands in %s\n') % path)
|
|
|
ui.traceback()
|
|
|
return
|
|
|
for c in aliases:
|
|
|
if c.startswith(cmd):
|
|
|
cmd = c
|
|
|
break
|
|
|
else:
|
|
|
cmd = aliases[0]
|
|
|
return (cmd, name, mod)
|
|
|
|
|
|
ext = None
|
|
|
# first, search for an extension with the same name as the command
|
|
|
path = paths.pop(cmd, None)
|
|
|
if path:
|
|
|
ext = findcmd(cmd, cmd, path)
|
|
|
if not ext:
|
|
|
# otherwise, interrogate each extension until there's a match
|
|
|
for name, path in paths.iteritems():
|
|
|
ext = findcmd(cmd, name, path)
|
|
|
if ext:
|
|
|
break
|
|
|
if ext and 'DEPRECATED' not in ext.__doc__:
|
|
|
return ext
|
|
|
|
|
|
raise error.UnknownCommand(cmd)
|
|
|
|
|
|
def enabled(shortname=True):
|
|
|
'''return a dict of {name: desc} of extensions'''
|
|
|
exts = {}
|
|
|
for ename, ext in extensions():
|
|
|
doc = (gettext(ext.__doc__) or _('(no help text available)'))
|
|
|
if shortname:
|
|
|
ename = ename.split('.')[-1]
|
|
|
exts[ename] = doc.splitlines()[0].strip()
|
|
|
|
|
|
return exts
|
|
|
|
|
|
def notloaded():
|
|
|
'''return short names of extensions that failed to load'''
|
|
|
return [name for name, mod in _extensions.iteritems() if mod is None]
|
|
|
|
|
|
def moduleversion(module):
|
|
|
'''return version information from given module as a string'''
|
|
|
if (util.safehasattr(module, 'getversion')
|
|
|
and callable(module.getversion)):
|
|
|
version = module.getversion()
|
|
|
elif util.safehasattr(module, '__version__'):
|
|
|
version = module.__version__
|
|
|
else:
|
|
|
version = ''
|
|
|
if isinstance(version, (list, tuple)):
|
|
|
version = '.'.join(str(o) for o in version)
|
|
|
return version
|
|
|
|
|
|
def ismoduleinternal(module):
|
|
|
exttestedwith = getattr(module, 'testedwith', None)
|
|
|
return exttestedwith == "ships-with-hg-core"
|
|
|
|
