Mercurial > hg
view hgext/fastannotate/protocol.py @ 45666:f6811e5bd994
changing-files: add clean computation of changed files for roots
The `files` field is not reliable, so we need to compute things from scratch. We
start with the simplest case root changesets. In the beginning they was nothing,
then user said "let there be files" and there were added files.
Differential Revision: https://phab.mercurial-scm.org/D9126
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
---|---|
date | Tue, 29 Sep 2020 22:38:08 +0200 |
parents | 649d3ac37a12 |
children | b6b696442a4d |
line wrap: on
line source
# Copyright 2016-present Facebook. All Rights Reserved. # # protocol: logic for a server providing fastannotate support # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from __future__ import absolute_import import contextlib import os from mercurial.i18n import _ from mercurial.pycompat import open from mercurial import ( error, extensions, hg, pycompat, util, wireprotov1peer, wireprotov1server, ) from . import context # common def _getmaster(ui): """get the mainbranch, and enforce it is set""" master = ui.config(b'fastannotate', b'mainbranch') if not master: raise error.Abort( _( b'fastannotate.mainbranch is required ' b'for both the client and the server' ) ) return master # server-side def _capabilities(orig, repo, proto): result = orig(repo, proto) result.append(b'getannotate') return result def _getannotate(repo, proto, path, lastnode): # output: # FILE := vfspath + '\0' + str(size) + '\0' + content # OUTPUT := '' | FILE + OUTPUT result = b'' buildondemand = repo.ui.configbool( b'fastannotate', b'serverbuildondemand', True ) with context.annotatecontext(repo, path) as actx: if buildondemand: # update before responding to the client master = _getmaster(repo.ui) try: if not actx.isuptodate(master): actx.annotate(master, master) except Exception: # non-fast-forward move or corrupted. rebuild automically. actx.rebuild() try: actx.annotate(master, master) except Exception: actx.rebuild() # delete files finally: # although the "with" context will also do a close/flush, we # need to do it early so we can send the correct respond to # client. actx.close() # send back the full content of revmap and linelog, in the future we # may want to do some rsync-like fancy updating. # the lastnode check is not necessary if the client and the server # agree where the main branch is. if actx.lastnode != lastnode: for p in [actx.revmappath, actx.linelogpath]: if not os.path.exists(p): continue with open(p, b'rb') as f: content = f.read() vfsbaselen = len(repo.vfs.base + b'/') relpath = p[vfsbaselen:] result += b'%s\0%d\0%s' % (relpath, len(content), content) return result def _registerwireprotocommand(): if b'getannotate' in wireprotov1server.commands: return wireprotov1server.wireprotocommand(b'getannotate', b'path lastnode')( _getannotate ) def serveruisetup(ui): _registerwireprotocommand() extensions.wrapfunction(wireprotov1server, b'_capabilities', _capabilities) # client-side def _parseresponse(payload): result = {} i = 0 l = len(payload) - 1 state = 0 # 0: vfspath, 1: size vfspath = size = b'' while i < l: ch = payload[i : i + 1] if ch == b'\0': if state == 1: result[vfspath] = payload[i + 1 : i + 1 + int(size)] i += int(size) state = 0 vfspath = size = b'' elif state == 0: state = 1 else: if state == 1: size += ch elif state == 0: vfspath += ch i += 1 return result def peersetup(ui, peer): class fastannotatepeer(peer.__class__): @wireprotov1peer.batchable def getannotate(self, path, lastnode=None): if not self.capable(b'getannotate'): ui.warn(_(b'remote peer cannot provide annotate cache\n')) yield None, None else: args = {b'path': path, b'lastnode': lastnode or b''} f = wireprotov1peer.future() yield args, f yield _parseresponse(f.value) peer.__class__ = fastannotatepeer @contextlib.contextmanager def annotatepeer(repo): ui = repo.ui remotepath = ui.expandpath( ui.config(b'fastannotate', b'remotepath', b'default') ) peer = hg.peer(ui, {}, remotepath) try: yield peer finally: peer.close() def clientfetch(repo, paths, lastnodemap=None, peer=None): """download annotate cache from the server for paths""" if not paths: return if peer is None: with annotatepeer(repo) as peer: return clientfetch(repo, paths, lastnodemap, peer) if lastnodemap is None: lastnodemap = {} ui = repo.ui results = [] with peer.commandexecutor() as batcher: ui.debug(b'fastannotate: requesting %d files\n' % len(paths)) for p in paths: results.append( batcher.callcommand( b'getannotate', {b'path': p, b'lastnode': lastnodemap.get(p)}, ) ) for result in results: r = result.result() # TODO: pconvert these paths on the server? r = {util.pconvert(p): v for p, v in pycompat.iteritems(r)} for path in sorted(r): # ignore malicious paths if not path.startswith(b'fastannotate/') or b'/../' in ( path + b'/' ): ui.debug( b'fastannotate: ignored malicious path %s\n' % path ) continue content = r[path] if ui.debugflag: ui.debug( b'fastannotate: writing %d bytes to %s\n' % (len(content), path) ) repo.vfs.makedirs(os.path.dirname(path)) with repo.vfs(path, b'wb') as f: f.write(content) def _filterfetchpaths(repo, paths): """return a subset of paths whose history is long and need to fetch linelog from the server. works with remotefilelog and non-remotefilelog repos. """ threshold = repo.ui.configint(b'fastannotate', b'clientfetchthreshold', 10) if threshold <= 0: return paths result = [] for path in paths: try: if len(repo.file(path)) >= threshold: result.append(path) except Exception: # file not found etc. result.append(path) return result def localreposetup(ui, repo): class fastannotaterepo(repo.__class__): def prefetchfastannotate(self, paths, peer=None): master = _getmaster(self.ui) needupdatepaths = [] lastnodemap = {} try: for path in _filterfetchpaths(self, paths): with context.annotatecontext(self, path) as actx: if not actx.isuptodate(master, strict=False): needupdatepaths.append(path) lastnodemap[path] = actx.lastnode if needupdatepaths: clientfetch(self, needupdatepaths, lastnodemap, peer) except Exception as ex: # could be directory not writable or so, not fatal self.ui.debug(b'fastannotate: prefetch failed: %r\n' % ex) repo.__class__ = fastannotaterepo def clientreposetup(ui, repo): _registerwireprotocommand() if repo.local(): localreposetup(ui, repo) # TODO: this mutates global state, but only if at least one repo # has the extension enabled. This is probably bad for hgweb. if peersetup not in hg.wirepeersetupfuncs: hg.wirepeersetupfuncs.append(peersetup)