Mercurial > hg
view hgext/remotenames.py @ 37295:45b39c69fae0
wireproto: separate commands tables for version 1 and 2 commands
We can't easily reuse existing command handlers for version 2
commands because the response types will be different. e.g. many
commands return nodes encoded as hex. Our new wire protocol is
binary safe, so we'll wish to encode nodes as binary.
We /could/ teach each command handler to look at the protocol
handler and change behavior based on the version in use. However,
this would make logic a bit unwieldy over time and would make
it harder to design a unified protocol handler interface. I think
it's better to create a clean break between version 1 and version 2
of commands on the server.
What I imagine happening is we will have separate @wireprotocommand
functions for each protocol generation. Those functions will parse the
request, dispatch to a common function to process it, then generate
the response in its own, transport-specific manner.
This commit establishes a separate table for tracking version 1
commands from version 2 commands. The HTTP server pieces have been
updated to use this new table.
Most commands are marked as both version 1 and version 2, so there is
little practical impact to this change.
A side-effect of this change is we now rely on transport registration
in wireprototypes.TRANSPORTS and certain properties of the protocol
interface. So a test had to be updated to conform.
Differential Revision: https://phab.mercurial-scm.org/D2982
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Wed, 28 Mar 2018 10:40:41 -0700 |
parents | a61fff493d98 |
children | 678ab0de7296 |
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# remotenames.py - extension to display remotenames # # Copyright 2017 Augie Fackler <raf@durin42.com> # Copyright 2017 Sean Farley <sean@farley.io> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. """ showing remotebookmarks and remotebranches in UI By default both remotebookmarks and remotebranches are turned on. Config knob to control the individually are as follows. Config options to tweak the default behaviour: remotenames.bookmarks Boolean value to enable or disable showing of remotebookmarks (default: True) remotenames.branches Boolean value to enable or disable showing of remotebranches (default: True) remotenames.hoistedpeer Name of the peer whose remotebookmarks should be hoisted into the top-level namespace (default: 'default') """ from __future__ import absolute_import from mercurial.i18n import _ from mercurial.node import ( bin, ) from mercurial import ( bookmarks, extensions, logexchange, namespaces, pycompat, registrar, revsetlang, smartset, templateutil, ) if pycompat.ispy3: import collections.abc mutablemapping = collections.abc.MutableMapping else: import collections mutablemapping = collections.MutableMapping # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should # be specifying the version(s) of Mercurial they are tested with, or # leave the attribute unspecified. testedwith = 'ships-with-hg-core' configtable = {} configitem = registrar.configitem(configtable) templatekeyword = registrar.templatekeyword() revsetpredicate = registrar.revsetpredicate() configitem('remotenames', 'bookmarks', default=True, ) configitem('remotenames', 'branches', default=True, ) configitem('remotenames', 'hoistedpeer', default='default', ) class lazyremotenamedict(mutablemapping): """ Read-only dict-like Class to lazily resolve remotename entries We are doing that because remotenames startup was slow. We lazily read the remotenames file once to figure out the potential entries and store them in self.potentialentries. Then when asked to resolve an entry, if it is not in self.potentialentries, then it isn't there, if it is in self.potentialentries we resolve it and store the result in self.cache. We cannot be lazy is when asked all the entries (keys). """ def __init__(self, kind, repo): self.cache = {} self.potentialentries = {} self._kind = kind # bookmarks or branches self._repo = repo self.loaded = False def _load(self): """ Read the remotenames file, store entries matching selected kind """ self.loaded = True repo = self._repo for node, rpath, rname in logexchange.readremotenamefile(repo, self._kind): name = rpath + '/' + rname self.potentialentries[name] = (node, rpath, name) def _resolvedata(self, potentialentry): """ Check that the node for potentialentry exists and return it """ if not potentialentry in self.potentialentries: return None node, remote, name = self.potentialentries[potentialentry] repo = self._repo binnode = bin(node) # if the node doesn't exist, skip it try: repo.changelog.rev(binnode) except LookupError: return None # Skip closed branches if (self._kind == 'branches' and repo[binnode].closesbranch()): return None return [binnode] def __getitem__(self, key): if not self.loaded: self._load() val = self._fetchandcache(key) if val is not None: return val else: raise KeyError() def __iter__(self): return iter(self.potentialentries) def __len__(self): return len(self.potentialentries) def __setitem__(self): raise NotImplementedError def __delitem__(self): raise NotImplementedError def _fetchandcache(self, key): if key in self.cache: return self.cache[key] val = self._resolvedata(key) if val is not None: self.cache[key] = val return val else: return None def keys(self): """ Get a list of bookmark or branch names """ if not self.loaded: self._load() return self.potentialentries.keys() def iteritems(self): """ Iterate over (name, node) tuples """ if not self.loaded: self._load() for k, vtup in self.potentialentries.iteritems(): yield (k, [bin(vtup[0])]) class remotenames(object): """ This class encapsulates all the remotenames state. It also contains methods to access that state in convenient ways. Remotenames are lazy loaded. Whenever client code needs to ensure the freshest copy of remotenames, use the `clearnames` method to force an eventual load. """ def __init__(self, repo, *args): self._repo = repo self.clearnames() def clearnames(self): """ Clear all remote names state """ self.bookmarks = lazyremotenamedict("bookmarks", self._repo) self.branches = lazyremotenamedict("branches", self._repo) self._invalidatecache() def _invalidatecache(self): self._nodetobmarks = None self._nodetobranch = None self._hoisttonodes = None self._nodetohoists = None def bmarktonodes(self): return self.bookmarks def nodetobmarks(self): if not self._nodetobmarks: bmarktonodes = self.bmarktonodes() self._nodetobmarks = {} for name, node in bmarktonodes.iteritems(): self._nodetobmarks.setdefault(node[0], []).append(name) return self._nodetobmarks def branchtonodes(self): return self.branches def nodetobranch(self): if not self._nodetobranch: branchtonodes = self.branchtonodes() self._nodetobranch = {} for name, nodes in branchtonodes.iteritems(): for node in nodes: self._nodetobranch.setdefault(node, []).append(name) return self._nodetobranch def hoisttonodes(self, hoist): if not self._hoisttonodes: marktonodes = self.bmarktonodes() self._hoisttonodes = {} hoist += '/' for name, node in marktonodes.iteritems(): if name.startswith(hoist): name = name[len(hoist):] self._hoisttonodes[name] = node return self._hoisttonodes def nodetohoists(self, hoist): if not self._nodetohoists: marktonodes = self.bmarktonodes() self._nodetohoists = {} hoist += '/' for name, node in marktonodes.iteritems(): if name.startswith(hoist): name = name[len(hoist):] self._nodetohoists.setdefault(node[0], []).append(name) return self._nodetohoists def wrapprintbookmarks(orig, ui, repo, bmarks, **opts): if 'remotebookmarks' not in repo.names: return ns = repo.names['remotebookmarks'] for name in ns.listnames(repo): nodes = ns.nodes(repo, name) if not nodes: continue node = nodes[0] bmarks[name] = (node, ' ', '') return orig(ui, repo, bmarks, **opts) def extsetup(ui): extensions.wrapfunction(bookmarks, '_printbookmarks', wrapprintbookmarks) def reposetup(ui, repo): if not repo.local(): return repo._remotenames = remotenames(repo) ns = namespaces.namespace if ui.configbool('remotenames', 'bookmarks'): remotebookmarkns = ns( 'remotebookmarks', templatename='remotebookmarks', colorname='remotebookmark', logfmt='remote bookmark: %s\n', listnames=lambda repo: repo._remotenames.bmarktonodes().keys(), namemap=lambda repo, name: repo._remotenames.bmarktonodes().get(name, []), nodemap=lambda repo, node: repo._remotenames.nodetobmarks().get(node, [])) repo.names.addnamespace(remotebookmarkns) # hoisting only works if there are remote bookmarks hoist = ui.config('remotenames', 'hoistedpeer') if hoist: hoistednamens = ns( 'hoistednames', templatename='hoistednames', colorname='hoistedname', logfmt='hoisted name: %s\n', listnames = lambda repo: repo._remotenames.hoisttonodes(hoist).keys(), namemap = lambda repo, name: repo._remotenames.hoisttonodes(hoist).get(name, []), nodemap = lambda repo, node: repo._remotenames.nodetohoists(hoist).get(node, [])) repo.names.addnamespace(hoistednamens) if ui.configbool('remotenames', 'branches'): remotebranchns = ns( 'remotebranches', templatename='remotebranches', colorname='remotebranch', logfmt='remote branch: %s\n', listnames = lambda repo: repo._remotenames.branchtonodes().keys(), namemap = lambda repo, name: repo._remotenames.branchtonodes().get(name, []), nodemap = lambda repo, node: repo._remotenames.nodetobranch().get(node, [])) repo.names.addnamespace(remotebranchns) @templatekeyword('remotenames', requires={'repo', 'ctx'}) def remotenameskw(context, mapping): """List of strings. Remote names associated with the changeset.""" repo = context.resource(mapping, 'repo') ctx = context.resource(mapping, 'ctx') remotenames = [] if 'remotebookmarks' in repo.names: remotenames = repo.names['remotebookmarks'].names(repo, ctx.node()) if 'remotebranches' in repo.names: remotenames += repo.names['remotebranches'].names(repo, ctx.node()) return templateutil.compatlist(context, mapping, 'remotename', remotenames, plural='remotenames') @templatekeyword('remotebookmarks', requires={'repo', 'ctx'}) def remotebookmarkskw(context, mapping): """List of strings. Remote bookmarks associated with the changeset.""" repo = context.resource(mapping, 'repo') ctx = context.resource(mapping, 'ctx') remotebmarks = [] if 'remotebookmarks' in repo.names: remotebmarks = repo.names['remotebookmarks'].names(repo, ctx.node()) return templateutil.compatlist(context, mapping, 'remotebookmark', remotebmarks, plural='remotebookmarks') @templatekeyword('remotebranches', requires={'repo', 'ctx'}) def remotebrancheskw(context, mapping): """List of strings. Remote branches associated with the changeset.""" repo = context.resource(mapping, 'repo') ctx = context.resource(mapping, 'ctx') remotebranches = [] if 'remotebranches' in repo.names: remotebranches = repo.names['remotebranches'].names(repo, ctx.node()) return templateutil.compatlist(context, mapping, 'remotebranch', remotebranches, plural='remotebranches') def _revsetutil(repo, subset, x, rtypes): """utility function to return a set of revs based on the rtypes""" revs = set() cl = repo.changelog for rtype in rtypes: if rtype in repo.names: ns = repo.names[rtype] for name in ns.listnames(repo): revs.update(ns.nodes(repo, name)) results = (cl.rev(n) for n in revs if cl.hasnode(n)) return subset & smartset.baseset(sorted(results)) @revsetpredicate('remotenames()') def remotenamesrevset(repo, subset, x): """All changesets which have a remotename on them.""" revsetlang.getargs(x, 0, 0, _("remotenames takes no arguments")) return _revsetutil(repo, subset, x, ('remotebookmarks', 'remotebranches')) @revsetpredicate('remotebranches()') def remotebranchesrevset(repo, subset, x): """All changesets which are branch heads on remotes.""" revsetlang.getargs(x, 0, 0, _("remotebranches takes no arguments")) return _revsetutil(repo, subset, x, ('remotebranches',)) @revsetpredicate('remotebookmarks()') def remotebmarksrevset(repo, subset, x): """All changesets which have bookmarks on remotes.""" revsetlang.getargs(x, 0, 0, _("remotebookmarks takes no arguments")) return _revsetutil(repo, subset, x, ('remotebookmarks',))