Mercurial > hg
view hgext/inotify/client.py @ 13287:d0e0d3d43e14 stable
subrepo: compare svn subrepo state to last committed revision
A subversion project revisions are a subset of the repository revisions, you
can ask subversion to update a working directory from one revision to another
without changing anything. Unfortunately, Mercurial will think the
subrepository has changed and will commit it again. To avoid useless commits,
we compare the subrepository state to its actual "parent" revision. To ensure
ascending compatibility with existing subrepositories which might reference
fake revisions, we also keep comparing with the subrepo working directory
revision.
NOTE: not sure if this should go in stable or not.
author | Patrick Mezard <pmezard@gmail.com> |
---|---|
date | Sat, 22 Jan 2011 16:15:40 +0100 |
parents | 516b000fbb7e |
children | 10103caea69d |
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# client.py - inotify status client # # Copyright 2006, 2007, 2008 Bryan O'Sullivan <bos@serpentine.com> # Copyright 2007, 2008 Brendan Cully <brendan@kublai.com> # Copyright 2009 Nicolas Dumazet <nicdumz@gmail.com> # # This software may be used and distributed according to the terms of the # GNU General Public License version 2 or any later version. from mercurial.i18n import _ import common, server import errno, os, socket, struct class QueryFailed(Exception): pass def start_server(function): """ Decorator. Tries to call function, if it fails, try to (re)start inotify server. Raise QueryFailed if something went wrong """ def decorated_function(self, *args): try: return function(self, *args) except (OSError, socket.error), err: autostart = self.ui.configbool('inotify', 'autostart', True) if err.args[0] == errno.ECONNREFUSED: self.ui.warn(_('inotify-client: found dead inotify server ' 'socket; removing it\n')) os.unlink(os.path.join(self.root, '.hg', 'inotify.sock')) if err.args[0] in (errno.ECONNREFUSED, errno.ENOENT) and autostart: try: try: server.start(self.ui, self.dirstate, self.root, dict(daemon=True, daemon_pipefds='')) except server.AlreadyStartedException, inst: # another process may have started its own # inotify server while this one was starting. self.ui.debug(str(inst)) except Exception, inst: self.ui.warn(_('inotify-client: could not start inotify ' 'server: %s\n') % inst) else: try: return function(self, *args) except socket.error, err: self.ui.warn(_('inotify-client: could not talk to new ' 'inotify server: %s\n') % err.args[-1]) elif err.args[0] in (errno.ECONNREFUSED, errno.ENOENT): # silently ignore normal errors if autostart is False self.ui.debug('(inotify server not running)\n') else: self.ui.warn(_('inotify-client: failed to contact inotify ' 'server: %s\n') % err.args[-1]) self.ui.traceback() raise QueryFailed('inotify query failed') return decorated_function class client(object): def __init__(self, ui, repo): self.ui = ui self.dirstate = repo.dirstate self.root = repo.root self.sock = socket.socket(socket.AF_UNIX) def _connect(self): sockpath = os.path.join(self.root, '.hg', 'inotify.sock') try: self.sock.connect(sockpath) except socket.error, err: if err.args[0] == "AF_UNIX path too long": sockpath = os.readlink(sockpath) self.sock.connect(sockpath) else: raise def _send(self, type, data): """Sends protocol version number, and the data""" self.sock.sendall(chr(common.version) + type + data) self.sock.shutdown(socket.SHUT_WR) def _receive(self, type): """ Read data, check version number, extract headers, and returns a tuple (data descriptor, header) Raises QueryFailed on error """ cs = common.recvcs(self.sock) try: version = ord(cs.read(1)) except TypeError: # empty answer, assume the server crashed self.ui.warn(_('inotify-client: received empty answer from inotify ' 'server')) raise QueryFailed('server crashed') if version != common.version: self.ui.warn(_('(inotify: received response from incompatible ' 'server version %d)\n') % version) raise QueryFailed('incompatible server version') readtype = cs.read(4) if readtype != type: self.ui.warn(_('(inotify: received \'%s\' response when expecting' ' \'%s\')\n') % (readtype, type)) raise QueryFailed('wrong response type') hdrfmt = common.resphdrfmts[type] hdrsize = common.resphdrsizes[type] try: resphdr = struct.unpack(hdrfmt, cs.read(hdrsize)) except struct.error: raise QueryFailed('unable to retrieve query response headers') return cs, resphdr def query(self, type, req): self._connect() self._send(type, req) return self._receive(type) @start_server def statusquery(self, names, match, ignored, clean, unknown=True): def genquery(): for n in names: yield n states = 'almrx!' if ignored: raise ValueError('this is insanity') if clean: states += 'c' if unknown: states += '?' yield states req = '\0'.join(genquery()) cs, resphdr = self.query('STAT', req) def readnames(nbytes): if nbytes: names = cs.read(nbytes) if names: return filter(match, names.split('\0')) return [] results = tuple(map(readnames, resphdr[:-1])) if names: nbytes = resphdr[-1] vdirs = cs.read(nbytes) if vdirs: for vdir in vdirs.split('\0'): match.dir(vdir) return results @start_server def debugquery(self): cs, resphdr = self.query('DBUG', '') nbytes = resphdr[0] names = cs.read(nbytes) return names.split('\0')