Mercurial > hg
view mercurial/extensions.py @ 18510:f254ab6207ae stable
subrepo: use sharepath if available when locating the source repo
This is an alternative fix for issue3518, enabling sharing of repositories with
subrepos, without unconditionally setting the default path in the resulting
repo's hgrc file. Better test coverage is added here, but won't prove this code
is working until fd903f89e42b is backed out.
The problem with the original fix is, if a default path is not available to be
copied over from the share source, the default path on the resulting repo is set
to the source location. Since that's where the actual repository is stored, the
path is essentially self-referential, so push, pull, incoming and outgoing
effectively operate on itself. While incoming and outgoing make it look like
nothing was changed, push currently hangs (see issue3657). In this case where
there is not a real default path, these operations should abort with
"default(-push) not found", like the source repo would. Note this problem with
the original fix affected repos without subrepos too.
author | Matt Harbison <matt_harbison@yahoo.com> |
---|---|
date | Tue, 27 Nov 2012 20:56:27 -0500 |
parents | 1b2b727a885f |
children | 013fcd112f13 |
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# extensions.py - extension handling for mercurial # # Copyright 2005-2007 Matt Mackall <mpm@selenic.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. import imp, os import util, cmdutil, error from i18n import _, gettext _extensions = {} _order = [] _ignore = ['hbisect', 'bookmarks', 'parentrevspec'] def extensions(): for name in _order: module = _extensions[name] if module: yield name, module def find(name): '''return module with given extension name''' mod = None try: mod = _extensions[name] except KeyError: for k, v in _extensions.iteritems(): if k.endswith('.' + name) or k.endswith('/' + name): mod = v break if not mod: raise KeyError(name) return mod def loadpath(path, module_name): module_name = module_name.replace('.', '_') path = util.expandpath(path) if os.path.isdir(path): # module/__init__.py style d, f = os.path.split(path.rstrip('/')) fd, fpath, desc = imp.find_module(f, [d]) return imp.load_module(module_name, fd, fpath, desc) else: try: return imp.load_source(module_name, path) except IOError, exc: if not exc.filename: exc.filename = path # python does not fill this raise def load(ui, name, path): # unused ui argument kept for backwards compatibility if name.startswith('hgext.') or name.startswith('hgext/'): shortname = name[6:] else: shortname = name if shortname in _ignore: return None if shortname in _extensions: return _extensions[shortname] _extensions[shortname] = None if path: # the module will be loaded in sys.modules # choose an unique name so that it doesn't # conflicts with other modules mod = loadpath(path, 'hgext.%s' % name) else: def importh(name): mod = __import__(name) components = name.split('.') for comp in components[1:]: mod = getattr(mod, comp) return mod try: mod = importh("hgext.%s" % name) except ImportError, err: ui.debug('could not import hgext.%s (%s): trying %s\n' % (name, err, name)) mod = importh(name) _extensions[shortname] = mod _order.append(shortname) return mod def loadall(ui): result = ui.configitems("extensions") newindex = len(_order) for (name, path) in result: if path: if path[0] == '!': continue try: load(ui, name, path) except KeyboardInterrupt: raise except Exception, inst: if path: ui.warn(_("*** failed to import extension %s from %s: %s\n") % (name, path, inst)) else: ui.warn(_("*** failed to import extension %s: %s\n") % (name, inst)) if ui.traceback(): return 1 for name in _order[newindex:]: uisetup = getattr(_extensions[name], 'uisetup', None) if uisetup: uisetup(ui) for name in _order[newindex:]: extsetup = getattr(_extensions[name], 'extsetup', None) if extsetup: try: extsetup(ui) except TypeError: if extsetup.func_code.co_argcount != 0: raise extsetup() # old extsetup with no ui argument def wrapcommand(table, command, wrapper): '''Wrap the command named `command' in table Replace command in the command table with wrapper. The wrapped command will be inserted into the command table specified by the table argument. The wrapper will be called like wrapper(orig, *args, **kwargs) where orig is the original (wrapped) function, and *args, **kwargs are the arguments passed to it. ''' assert util.safehasattr(wrapper, '__call__') aliases, entry = cmdutil.findcmd(command, table) for alias, e in table.iteritems(): if e is entry: key = alias break origfn = entry[0] def wrap(*args, **kwargs): return util.checksignature(wrapper)( util.checksignature(origfn), *args, **kwargs) wrap.__doc__ = getattr(origfn, '__doc__') wrap.__module__ = getattr(origfn, '__module__') newentry = list(entry) newentry[0] = wrap table[key] = tuple(newentry) return entry def wrapfunction(container, funcname, wrapper): '''Wrap the function named funcname in container Replace the funcname member in the given container with the specified wrapper. The container is typically a module, class, or instance. The wrapper will be called like wrapper(orig, *args, **kwargs) where orig is the original (wrapped) function, and *args, **kwargs are the arguments passed to it. Wrapping methods of the repository object is not recommended since it conflicts with extensions that extend the repository by subclassing. All extensions that need to extend methods of localrepository should use this subclassing trick: namely, reposetup() should look like def reposetup(ui, repo): class myrepo(repo.__class__): def whatever(self, *args, **kwargs): [...extension stuff...] super(myrepo, self).whatever(*args, **kwargs) [...extension stuff...] repo.__class__ = myrepo In general, combining wrapfunction() with subclassing does not work. Since you cannot control what other extensions are loaded by your end users, you should play nicely with others by using the subclass trick. ''' assert util.safehasattr(wrapper, '__call__') def wrap(*args, **kwargs): return wrapper(origfn, *args, **kwargs) origfn = getattr(container, funcname) assert util.safehasattr(origfn, '__call__') setattr(container, funcname, wrap) return origfn 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(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 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).splitlines()[0] 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: pass paths = _disabledpaths() if not paths: return {} exts = {} for name, path in paths.iteritems(): doc = _disabledhelp(path) if doc: exts[name] = doc 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: 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(): '''return a dict of {name: desc} of extensions''' exts = {} for ename, ext in extensions(): doc = (gettext(ext.__doc__) or _('(no help text available)')) ename = ename.split('.')[-1] exts[ename] = doc.splitlines()[0].strip() return exts