# hgsql.py # # Copyright 2013 Facebook, Inc. # # 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.node import bin, hex, nullid, nullrev from mercurial.i18n import _ from mercurial.extensions import wrapfunction, wrapcommand from mercurial import error, cmdutil, revlog, localrepo from mercurial import wireproto, bookmarks, repair, commands, hg, mdiff, phases from mercurial import util, changegroup, exchange, bundle2, bundlerepo from mercurial import demandimport import os, struct, time, Queue, threading import warnings import sys # mysql.connector does not import nicely with the demandimporter, so temporarily # disable it. with demandimport.deactivated(): import mysql.connector cmdtable = {} command = cmdutil.command(cmdtable) testedwith = '3.9.1' writelock = 'write_lock' INITIAL_SYNC_NORMAL = 'normal' INITIAL_SYNC_DISABLE = 'disabled' INITIAL_SYNC_FORCE = 'force' initialsync = INITIAL_SYNC_NORMAL cls = localrepo.localrepository for reqs in ['supportedformats', 'openerreqs', '_basesupported']: getattr(cls, reqs).add('hgsql') def newreporequirements(orig, repo): reqs = orig(repo) if repo.ui.configbool('format', 'usehgsql', True): reqs.add('hgsql') return reqs class CorruptionException(Exception): pass def issqlrepo(repo): return repo.ui.configbool('hgsql', 'enabled') def cansyncwithsql(repo): return issqlrepo(repo) and not isinstance(repo, bundlerepo.bundlerepository) def uisetup(ui): if ui.configbool("hgsql", "bypass"): return wrapfunction(localrepo, 'newreporequirements', newreporequirements) # Enable SQL for local commands that write to the repository. wrapcommand(commands.table, 'pull', pull) wrapcommand(commands.table, 'commit', commit) wrapcommand(commands.table, 'bookmark', bookmarkcommand) wrapfunction(exchange, '_localphasemove', _localphasemove) wrapfunction(exchange, 'push', push) # Enable SQL for remote commands that write to the repository wireproto.commands['unbundle'] = (wireproto.unbundle, 'heads') wrapfunction(exchange, 'unbundle', unbundle) wrapfunction(wireproto, 'pushkey', pushkey) wireproto.commands['pushkey'] = (wireproto.pushkey, 'namespace key old new') wrapfunction(bookmarks, 'updatefromremote', updatefromremote) if util.safehasattr(changegroup, 'addchangegroup'): wrapfunction(changegroup, 'addchangegroup', addchangegroup) else: # Mercurial 3.6+ wrapfunction(changegroup.cg1unpacker, 'apply', changegroupapply) # Record revlog writes def writeentry(orig, self, transaction, ifh, dfh, entry, data, link, offset): """records each revlog write to the repo's pendingrev list""" if not util.safehasattr(transaction, "repo"): return orig(self, transaction, ifh, dfh, entry, data, link, offset) e = struct.unpack(revlog.indexformatng, entry) node = hex(e[7]) data0 = data[0] or '' transaction.repo.pendingrevs.append((self.indexfile, link, len(self) - 1, node, entry, data0, data[1])) return orig(self, transaction, ifh, dfh, entry, data, link, offset) wrapfunction(revlog.revlog, '_writeentry', writeentry) # Reorder incoming revs to be in linkrev order wrapfunction(revlog.revlog, 'addgroup', addgroup) def extsetup(ui): if ui.configbool("hgsql", "bypass"): return if ui.configbool('hgsql', 'enabled'): commands.globalopts.append( ('', 'forcesync', False, _('force hgsql sync even on read-only commands'), _('TYPE'))) # Directly examining argv seems like a terrible idea, but it seems # neccesary unless we refactor mercurial dispatch code. This is because # the first place we have access to parsed options is in the same function # (dispatch.dispatch) that created the repo and the repo creation initiates # the sync operation in which the lock is elided unless we set this. if '--forcesync' in sys.argv: ui.debug('forcesync enabled\n') global initialsync initialsync = INITIAL_SYNC_FORCE def reposetup(ui, repo): if ui.configbool("hgsql", "bypass"): return if issqlrepo(repo): wraprepo(repo) if initialsync != INITIAL_SYNC_DISABLE and cansyncwithsql(repo): # Use a noop to force a sync def noop(): pass waitforlock = (initialsync == INITIAL_SYNC_FORCE) executewithsql(repo, noop, waitforlock=waitforlock) # Incoming commits are only allowed via push and pull def unbundle(orig, repo, cg, *args, **kwargs): if not issqlrepo(repo): return orig(repo, cg, *args, **kwargs) isbundle2 = util.safehasattr(cg, 'params') islazylocking = repo.ui.configbool('experimental', 'bundle2lazylocking') if isbundle2 and islazylocking: # lazy locked bundle2 exception = None oldopclass = None context = None try: context = sqlcontext(repo, takelock=True, waitforlock=True) # Temporarily replace bundleoperation so we can hook into it's # locking mechanism. oldopclass = bundle2.bundleoperation class sqllockedoperation(bundle2.bundleoperation): def __init__(self, repo, transactiongetter, *args, **kwargs): def sqllocktr(): if not context.active(): context.__enter__() return transactiongetter() super(sqllockedoperation, self).__init__(repo, sqllocktr, *args, **kwargs) # undo our temporary wrapping bundle2.bundleoperation = oldopclass bundle2.bundleoperation = sqllockedoperation return orig(repo, cg, *args, **kwargs) except Exception as ex: exception = ex raise finally: # Be extra sure to undo our wrapping if oldopclass: bundle2.bundleoperation = oldopclass # release sqllock here in exit if context: type = value = traceback = None if exception: type = exception.__class__ value = exception traceback = [] # This isn't really important context.__exit__(type, value, traceback) else: # bundle1 or non-lazy locked return executewithsql(repo, orig, True, repo, cg, *args, **kwargs) def pull(orig, *args, **kwargs): repo = args[1] if issqlrepo(repo): return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def push(orig, *args, **kwargs): repo = args[0] if issqlrepo(repo): # A push locks the local repo in order to update phase data, so we need # to take the lock for the local repo during a push. return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def commit(orig, *args, **kwargs): repo = args[1] if issqlrepo(repo): return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def updatefromremote(orig, *args, **kwargs): repo = args[1] if issqlrepo(repo): return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def addchangegroup(orig, *args, **kwargs): repo = args[0] if issqlrepo(repo): return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def changegroupapply(orig, *args, **kwargs): repo = args[1] if issqlrepo(repo): return executewithsql(repo, orig, True, *args, **kwargs) else: return orig(*args, **kwargs) def _localphasemove(orig, pushop, *args, **kwargs): repo = pushop.repo if issqlrepo(repo): return executewithsql(repo, orig, True, pushop, *args, **kwargs) else: return orig(pushop, *args, **kwargs) class sqlcontext(object): def __init__(self, repo, takelock=False, waitforlock=False): self.repo = repo self.takelock = takelock self.waitforlock = waitforlock self._connected = False self._locked = False self._used = False self._startlocktime = 0 self._active = False self._profiler = None def active(self): return self._active def __enter__(self): if self._used: raise Exception("error: using sqlcontext twice") self._used = True self._active = True repo = self.repo if not repo.sqlconn: repo.sqlconnect() self._connected = True if self.takelock and not writelock in repo.heldlocks: startwait = time.time() try: repo.sqllock(writelock) except error.Abort: elapsed = time.time() - startwait repo.ui.log("sqllock", "failed to get sql lock after %s " "seconds\n", elapsed, elapsed=elapsed * 1000, valuetype='lockwait', success='false') raise self._startprofile() self._locked = True elapsed = time.time() - startwait repo.ui.log("sqllock", "waited for sql lock for %s seconds\n", elapsed, elapsed=elapsed * 1000, valuetype='lockwait', success='true') self._startlocktime = time.time() if self._connected: repo.syncdb(waitforlock=self.waitforlock) def __exit__(self, type, value, traceback): try: repo = self.repo if self._locked: elapsed = time.time() - self._startlocktime repo.ui.log("sqllock", "held sql lock for %s seconds\n", elapsed, elapsed=elapsed * 1000, valuetype='lockheld') self._stopprofile(elapsed) repo.sqlunlock(writelock) if self._connected: repo.sqlclose() self._active = False except mysql.connector.errors.Error: # Only raise sql exceptions if the wrapped code threw no exception if type is None: raise def _startprofile(self): profiler = self.repo.ui.config('hgsql', 'profiler', None) if not profiler: return freq = self.repo.ui.configint('profiling', 'freq', default=1000) if profiler == 'ls': from mercurial import lsprof self._profiler = lsprof.Profiler() self._profiler.enable(subcalls=True) elif profiler == 'stat': import statprof statprof.reset(freq) statprof.start() else: raise Exception("unknown profiler: %s" % profiler) def _stopprofile(self, elapsed): profiler = self.repo.ui.config('hgsql', 'profiler', None) if not profiler: return outputdir = self.repo.ui.config('hgsql', 'profileoutput', '/tmp') import random pid = os.getpid() rand = random.random() timestamp = time.time() if profiler == 'ls': from mercurial import lsprof self._profiler.disable() stats = lsprof.Stats(self._profiler.getstats()) stats.sort('inlinetime') path = os.path.join(outputdir, 'hgsql-profile-%s-%s-%s' % (pid, timestamp, rand)) with open(path, 'a+') as f: stats.pprint(limit=30, file=f, climit=0) f.write("Total Elapsed Time: %s\n" % elapsed) elif profiler == 'stat': import statprof statprof.stop() path = os.path.join(outputdir, 'hgsql-profile-%s-%s-%s' % (pid, timestamp, rand)) with open(path, 'a+') as f: statprof.display(f) f.write("Total Elapsed Time: %s\n" % elapsed) def executewithsql(repo, action, sqllock=False, *args, **kwargs): """Executes the given action while having a SQL connection open. If a locks are specified, those locks are held for the duration of the action. """ # executewithsql can be executed in a nested scenario (ex: writing # bookmarks during a pull), so track whether this call performed # the connect. waitforlock = sqllock if 'waitforlock' in kwargs: if not waitforlock: waitforlock = kwargs['waitforlock'] del kwargs['waitforlock'] with sqlcontext(repo, takelock=sqllock, waitforlock=waitforlock): return action(*args, **kwargs) def wraprepo(repo): class sqllocalrepo(repo.__class__): def sqlconnect(self): if self.sqlconn: raise Exception("SQL connection already open") if self.sqlcursor: raise Exception("SQL cursor already open without connection") retry = 3 while True: try: self.sqlconn = mysql.connector.connect(force_ipv6=True, **self.sqlargs) # The default behavior is to return byte arrays, when we # need strings. This custom convert returns strings. self.sqlconn.set_converter_class(CustomConverter) break except mysql.connector.errors.Error: # mysql can be flakey occasionally, so do some minimal # retrying. retry -= 1 if retry == 0: raise time.sleep(0.2) waittimeout = self.ui.config('hgsql', 'waittimeout', '300') waittimeout = self.sqlconn.converter.escape('%s' % waittimeout) self.locktimeout = self.ui.config('hgsql', 'locktimeout', '60') self.locktimeout = self.sqlconn.converter.escape('%s' % self.locktimeout) self.sqlcursor = self.sqlconn.cursor() self.sqlcursor.execute("SET wait_timeout=%s" % waittimeout) self.sqlcursor.execute("SET innodb_lock_wait_timeout=%s" % self.locktimeout) def sqlclose(self): with warnings.catch_warnings(): warnings.simplefilter("ignore") self.sqlcursor.close() self.sqlconn.close() self.sqlcursor = None self.sqlconn = None def _lockname(self, name): lockname = "%s_%s" % (name, self.sqlreponame) return self.sqlconn.converter.escape(lockname) def sqllock(self, name): lockname = self._lockname(name) # cast to int to prevent passing bad sql data self.sqlcursor.execute("SELECT GET_LOCK('%s', %s)" % (lockname, self.locktimeout)) result = int(self.sqlcursor.fetchall()[0][0]) if result != 1: raise util.Abort("timed out waiting for mysql repo lock (%s)" % lockname) self.heldlocks.add(name) def hassqllock(self, name, checkserver=True): if not name in self.heldlocks: return False if not checkserver: return True lockname = self._lockname(name) self.sqlcursor.execute("SELECT IS_USED_LOCK('%s')" % (lockname,)) lockheldby = self.sqlcursor.fetchall()[0][0] if lockheldby == None: raise Exception("unable to check %s lock" % lockname) self.sqlcursor.execute("SELECT CONNECTION_ID()") myconnectid = self.sqlcursor.fetchall()[0][0] if myconnectid == None: raise Exception("unable to read connection id") return lockheldby == myconnectid def sqlunlock(self, name): lockname = self._lockname(name) self.sqlcursor.execute("SELECT RELEASE_LOCK('%s')" % (lockname,)) self.sqlcursor.fetchall() self.heldlocks.discard(name) for callback in self.sqlpostrelease: callback() self.sqlpostrelease = [] def lock(self, *args, **kwargs): wl = self._wlockref and self._wlockref() if (not self._issyncing and not (wl is not None and wl.held) and not self.hassqllock(writelock, checkserver=False)): self._recordbadlockorder() return super(sqllocalrepo, self).lock(*args, **kwargs) def wlock(self, *args, **kwargs): if (not self._issyncing and not self.hassqllock(writelock, checkserver=False)): self._recordbadlockorder() return super(sqllocalrepo, self).wlock(*args, **kwargs) def _recordbadlockorder(self): self.ui.debug("hgsql: invalid lock order\n") outputdir = self.ui.config('hgsql', 'profileoutput') if outputdir: import random, traceback pid = os.getpid() rand = random.random() timestamp = time.time() path = os.path.join(outputdir, 'hgsql-lockorder-%s-%s-%s' % (timestamp, pid, rand)) with open(path, 'a+') as f: stack = traceback.format_stack() f.write(''.join(stack)) def transaction(self, *args, **kwargs): tr = super(sqllocalrepo, self).transaction(*args, **kwargs) if tr.count > 1: return tr validator = tr.validator def pretxnclose(tr): validator(tr) self.committodb(tr) del self.pendingrevs[:] tr.validator = pretxnclose def transactionabort(orig): del self.pendingrevs[:] return orig() wrapfunction(tr, "_abort", transactionabort) tr.repo = self return tr def needsync(self): """Returns True if the local repo is not in sync with the database. If it returns False, the heads and bookmarks match the database. """ self.sqlcursor.execute("""SELECT namespace, name, value FROM revision_references WHERE repo = %s""", (self.sqlreponame,)) sqlheads = set() sqlbookmarks = {} tip = -1 for namespace, name, value in self.sqlcursor: if namespace == "heads": sqlheads.add(bin(value)) elif namespace == "bookmarks": sqlbookmarks[name] = bin(value) elif namespace == "tip": tip = int(value) # Since we don't have the lock right now, and since this is the # first place we load the changelog and bookmarks off disk, it's # important that we load bookmarks before the changelog here. This # way we know that the bookmarks point to valid nodes. Otherwise, # the bookmarks might change between us reading the changelog and # the bookmark file. bookmarks = self._bookmarks heads = set(self.heads()) outofsync = heads != sqlheads or bookmarks != sqlbookmarks or tip != len(self) - 1 return outofsync, sqlheads, sqlbookmarks, tip def synclimiter(self): """Attempts to acquire the lock used to rate limit how many read-only clients perform database syncs at the same time. If None is returned, it means the limiter was not acquired, and readonly clients should not attempt to perform a sync.""" try: wait = False return self._lock(self.svfs, "synclimiter", wait, None, None, _('repository %s') % self.origroot) except error.LockHeld: return None def syncdb(self, waitforlock=False): """Attempts to sync the local repository with the latest bits in the database. If `waitforlock` is False, the sync is on a best effort basis, and the repo may not actually be up-to-date afterwards. If `waitforlock` is True, we guarantee that the repo is up-to-date when this function returns, otherwise an exception will be thrown.""" try: self._issyncing = True if waitforlock: return self._syncdb(waitforlock) else: # For operations that do not require the absolute latest bits, # only let one process update the repo at a time. limiter = self.synclimiter() if not limiter: # Someone else is already checking and updating the repo self.ui.debug("skipping database sync because another " "process is already syncing\n") # It's important that we load bookmarks before the # changelog. This way we know that the bookmarks point to # valid nodes. Otherwise, the bookmarks might change between # us reading the changelog and the bookmark file. Normally # this would be done in needsync(), but since we're skipping # the sync, we can do it here. Accessing self._bookmarks # loads both the bookmarks and the changelog. self._bookmarks return try: return self._syncdb(waitforlock) finally: limiter.release() finally: self._issyncing = False def _syncdb(self, waitforlock): if not self.needsync()[0]: ui.debug("syncing not needed\n") return ui.debug("syncing with mysql\n") # Save a copy of the old manifest cache so we can put it back # afterwards. oldmancache = self.manifestlog._dirmancache wlock = lock = None try: wlock = self.wlock(wait=waitforlock) lock = self.lock(wait=waitforlock) except error.LockHeld: if waitforlock: raise # Oh well. Don't block this non-critical read-only operation. ui.debug("skipping sync for current operation\n") return configbackups = [] try: # Disable all pretxnclose hooks, since these revisions are # technically already commited. for name, value in ui.configitems("hooks"): if name.startswith("pretxnclose"): configbackups.append(ui.backupconfig("hooks", name)) ui.setconfig("hooks", name, None) # The hg-ssh wrapper installs a hook to block all writes. We need to # circumvent this when we sync from the server. configbackups.append(ui.backupconfig("hooks", "pretxnopen.hg-ssh")) self.ui.setconfig("hooks", "pretxnopen.hg-ssh", None) # Someone else may have synced us while we were waiting. # Restart the transaction so we have access to the latest rows. self.sqlconn.rollback() outofsync, sqlheads, sqlbookmarks, fetchend = self.needsync() if not outofsync: return transaction = self.transaction("syncdb") self.hook('presyncdb', throw=True) try: # Inspect the changelog now that we have the lock fetchstart = len(self.changelog) queue = Queue.Queue() abort = threading.Event() t = threading.Thread(target=self.fetchthread, args=(queue, abort, fetchstart, fetchend)) t.setDaemon(True) try: t.start() addentries(self, queue, transaction) finally: abort.set() phases.advanceboundary(self, transaction, phases.public, self.heads()) transaction.close() finally: transaction.release() # We circumvent the changelog and manifest when we add entries to # the revlogs. So clear all the caches. self.invalidate() self._filecache.pop('changelog', None) self._filecache.pop('manifestlog', None) self._filecache.pop('_phasecache', None) # Refill the cache. We can't just reuse the exact contents of # the old cached ctx, since the old ctx contains a reference to # the old revlog, which is now out of date. mfl = self.manifestlog for dirname, lrucache in oldmancache.iteritems(): if dirname == '': for oldmfnode in lrucache: oldmfctx = lrucache[oldmfnode] if oldmfctx._data is not None: mfl[oldmfnode]._data = oldmfctx._data heads = set(self.heads()) heads.discard(nullid) if heads != sqlheads: raise CorruptionException("heads don't match after sync") if len(self) - 1 != fetchend: raise CorruptionException("tip doesn't match after sync") self.disablesync = True transaction = self.transaction("syncdb_bookmarks") try: bm = self._bookmarks bm.clear() self.sqlcursor.execute("""SELECT name, value FROM revision_references WHERE namespace = 'bookmarks' AND repo = %s""", (self.sqlreponame,)) for name, node in self.sqlcursor: node = bin(node) if node in self: bm[name] = node bm.recordchange(transaction) transaction.close() finally: transaction.release() self.disablesync = False if bm != sqlbookmarks: raise CorruptionException("bookmarks don't match after sync") finally: for backup in configbackups: ui.restoreconfig(backup) if lock: lock.release() if wlock: wlock.release() # Since we just exited the lock, the changelog and bookmark # in-memory structures will need to be reloaded. If we loaded # changelog before bookmarks, we might accidentally load bookmarks # that don't exist in the loaded changelog. So let's force loading # bookmarks now. bm = self._bookmarks def fetchthread(self, queue, abort, fetchstart, fetchend): """Fetches every revision from fetchstart to fetchend (inclusive) and places them on the queue. This function is meant to run on a background thread and listens to the abort event to abort early. """ clrev = fetchstart chunksize = 1000 try: while True: if abort.isSet(): break maxrev = min(clrev + chunksize, fetchend + 1) self.sqlcursor.execute("""SELECT path, chunk, chunkcount, linkrev, entry, data0, data1 FROM revisions WHERE repo = %s AND linkrev > %s AND linkrev < %s ORDER BY linkrev ASC""", (self.sqlreponame, clrev - 1, maxrev)) # Put split chunks back together into a single revision groupedrevdata = {} for revdata in self.sqlcursor: name = revdata[0] chunk = revdata[1] linkrev = revdata[3] groupedrevdata.setdefault((name, linkrev), {})[chunk] = revdata if not groupedrevdata: break fullrevisions = [] for chunks in groupedrevdata.itervalues(): chunkcount = chunks[0][2] if chunkcount == 1: fullrevisions.append(chunks[0]) elif chunkcount == len(chunks): fullchunk = list(chunks[0]) data1 = "" for i in range(0, chunkcount): data1 += chunks[i][6] fullchunk[6] = data1 fullrevisions.append(tuple(fullchunk)) else: raise Exception("missing revision chunk - expected %s got %s" % (chunkcount, len(chunks))) fullrevisions = sorted(fullrevisions, key=lambda revdata: revdata[3]) for revdata in fullrevisions: queue.put(revdata) clrev += chunksize except Exception as ex: queue.put(ex) return queue.put(False) def pushkey(self, namespace, key, old, new): def _pushkey(): return super(sqllocalrepo, self).pushkey(namespace, key, old, new) return executewithsql(self, _pushkey, namespace == 'bookmarks') def committodb(self, tr): """Commits all pending revisions to the database """ if self.sqlconn == None: raise util.Abort("invalid repo change - only hg push and pull" + " are allowed") if not self.pendingrevs and not 'bookmark_moved' in tr.hookargs: return if self.disablesync: return reponame = self.sqlreponame cursor = self.sqlcursor maxcommitsize = self.maxcommitsize maxinsertsize = self.maxinsertsize maxrowsize = self.maxrowsize if self.pendingrevs: self._validatependingrevs() def insert(args, values): argstring = ','.join(args) cursor.execute("INSERT INTO revisions(repo, path, " "chunk, chunkcount, linkrev, rev, node, entry, " "data0, data1, createdtime) VALUES %s" % argstring, values) try: commitsize = 0 insertsize = 0 args = [] values = [] now = time.strftime('%Y-%m-%d %H:%M:%S') for revision in self.pendingrevs: path, linkrev, rev, node, entry, data0, data1 = revision start = 0 chunk = 0 datalen = len(data1) chunkcount = datalen / maxrowsize if datalen % maxrowsize != 0 or datalen == 0: chunkcount += 1 # We keep row size down by breaking large revisions down into # smaller chunks. while chunk == 0 or start < len(data1): end = min(len(data1), start + maxrowsize) datachunk = data1[start:end] args.append('(%s,%s,%s,%s,%s,%s,%s,%s,%s,%s,%s)') values.extend((reponame, path, chunk, chunkcount, linkrev, rev, node, entry, data0, datachunk, now)) size = len(datachunk) commitsize += size insertsize += size chunk += 1 start = end # Minimize roundtrips by doing bulk inserts if insertsize > maxinsertsize: insert(args, values) del args[:] del values[:] insertsize = 0 # MySQL transactions can only reach a certain size, so we commit # every so often. As long as we don't update the tip pushkey, # this is ok. if commitsize > maxcommitsize: self.sqlconn.commit() commitsize = 0 if args: insert(args, values) # commit at the end just to make sure we're clean self.sqlconn.commit() # Compute new heads, and delete old heads newheads = set(hex(n) for n in self.heads()) oldheads = [] cursor.execute( "SELECT value FROM revision_references " "WHERE repo = %s AND namespace='heads'", (reponame,) ) for head in cursor: head = head[0] if head in newheads: newheads.discard(head) else: oldheads.append(head) if oldheads: headargs = ','.join(['%s'] * len(oldheads)) cursor.execute( "DELETE revision_references FROM revision_references " + "FORCE INDEX (bookmarkindex) " + "WHERE namespace = 'heads' " + "AND repo = %s AND value IN (" + headargs + ")", (reponame,) + tuple(oldheads) ) # Compute new bookmarks, and delete old bookmarks newbookmarks = dict((k, hex(v)) for k, v in self._bookmarks.iteritems()) oldbookmarks = [] cursor.execute( "SELECT name, value FROM revision_references " "WHERE namespace = 'bookmarks' AND repo = %s", (reponame,) ) for k, v in cursor: if newbookmarks.get(k) == v: del newbookmarks[k] else: oldbookmarks.append(k) if oldbookmarks: bookargs = ','.join(['%s'] * len(oldbookmarks)) cursor.execute( "DELETE revision_references FROM revision_references " + "FORCE INDEX (bookmarkindex) " + "WHERE namespace = 'bookmarks' AND repo = %s " + "AND name IN (" + bookargs + ")", (repo.sqlreponame,) + tuple(oldbookmarks) ) tmpl = [] values = [] for head in newheads: tmpl.append("(%s, 'heads', NULL, %s)") values.append(reponame) values.append(head) for k, v in newbookmarks.iteritems(): tmpl.append("(%s, 'bookmarks', %s, %s)") values.append(repo.sqlreponame) values.append(k) values.append(v) if tmpl: cursor.execute("INSERT INTO revision_references(repo, namespace, name, value) " + "VALUES %s" % ','.join(tmpl), tuple(values)) # revision_references has multiple keys (primary key, and a unique index), so # mysql gives a warning when using ON DUPLICATE KEY since it would only update one # row despite multiple key duplicates. This doesn't matter for us, since we know # there is only one row that will share the same key. So suppress the warning. cursor.execute("""INSERT INTO revision_references(repo, namespace, name, value) VALUES(%s, 'tip', 'tip', %s) ON DUPLICATE KEY UPDATE value=%s""", (reponame, len(self) - 1, len(self) - 1)) # Just to be super sure, check the write lock before doing the final commit if not self.hassqllock(writelock): raise Exception("attempting to write to sql without holding %s (precommit)" % writelock) self.sqlconn.commit() except: self.sqlconn.rollback() raise finally: del self.pendingrevs[:] def _validatependingrevs(self): """Validates that the current pending revisions will be valid when written to the database. """ reponame = self.sqlreponame cursor = self.sqlcursor # Ensure we hold the write lock if not self.hassqllock(writelock): raise Exception("attempting to write to sql without holding %s (prevalidate)" % writelock) # Validate that we are appending to the correct linkrev cursor.execute("""SELECT value FROM revision_references WHERE repo = %s AND namespace = 'tip'""", (reponame,)) tipresults = cursor.fetchall() if len(tipresults) == 0: maxlinkrev = -1 elif len(tipresults) == 1: maxlinkrev = int(tipresults[0][0]) else: raise CorruptionException(("multiple tips for %s in " + " the database") % reponame) minlinkrev = min(self.pendingrevs, key= lambda x: x[1])[1] if maxlinkrev == None or maxlinkrev != minlinkrev - 1: raise CorruptionException("attempting to write non-sequential " + "linkrev %s, expected %s" % (minlinkrev, maxlinkrev + 1)) # Clean up excess revisions left from interrupted commits. # Since MySQL can only hold so much data in a transaction, we allow # committing across multiple db transactions. That means if # the commit is interrupted, the next transaction needs to clean # up bad revisions. cursor.execute("""DELETE FROM revisions WHERE repo = %s AND linkrev > %s""", (reponame, maxlinkrev)) # Validate that all rev dependencies (base, p1, p2) have the same # node in the database pending = set([(path, rev) for path, _, rev, _, _, _, _ in self.pendingrevs]) expectedrevs = set() for revision in self.pendingrevs: path, linkrev, rev, node, entry, data0, data1 = revision e = struct.unpack(revlog.indexformatng, entry) _, _, _, base, _, p1r, p2r, _ = e if p1r != nullrev and not (path, p1r) in pending: expectedrevs.add((path, p1r)) if p2r != nullrev and not (path, p2r) in pending: expectedrevs.add((path, p2r)) if (base != nullrev and base != rev and not (path, base) in pending): expectedrevs.add((path, base)) if not expectedrevs: return missingrevs = [] expectedlist = list(expectedrevs) expectedcount = len(expectedrevs) batchsize = self.ui.configint('hgsql', 'verifybatchsize', 1000) i = 0 while i < expectedcount: checkrevs = set(expectedlist[i:i + batchsize]) i += batchsize whereclauses = [] args = [] args.append(reponame) for path, rev in checkrevs: whereclauses.append("(path, rev, chunk) = (%s, %s, 0)") args.append(path) args.append(rev) whereclause = ' OR '.join(whereclauses) cursor.execute("""SELECT path, rev, node FROM revisions WHERE repo = %s AND (""" + whereclause + ")", args) for path, rev, node in cursor: rev = int(rev) checkrevs.remove((path, rev)) rl = None if path == '00changelog.i': rl = self.changelog elif path == '00manifest.i': rl = self.manifestlog._revlog else: rl = revlog.revlog(self.svfs, path) localnode = hex(rl.node(rev)) if localnode != node: raise CorruptionException(("expected node %s at rev %d of " "%s but found %s") % (node, rev, path, localnode)) if len(checkrevs) > 0: missingrevs.extend(checkrevs) if missingrevs: raise CorruptionException(("unable to verify %d dependent " + "revisions before adding a commit") % (len(missingrevs))) def _afterlock(self, callback): if self.hassqllock(writelock, checkserver=False): self.sqlpostrelease.append(callback) else: return super(sqllocalrepo, self)._afterlock(callback) ui = repo.ui sqlargs = {} sqlargs['host'] = ui.config("hgsql", "host") sqlargs['database'] = ui.config("hgsql", "database") sqlargs['user'] = ui.config("hgsql", "user") sqlargs['port'] = ui.configint("hgsql", "port") password = ui.config("hgsql", "password", "") if password: sqlargs['password'] = password repo.sqlargs = sqlargs repo.sqlreponame = ui.config("hgsql", "reponame") if not repo.sqlreponame: raise Exception("missing hgsql.reponame") repo.maxcommitsize = ui.configbytes("hgsql", "maxcommitsize", 52428800) # 50MB repo.maxinsertsize = ui.configbytes("hgsql", "maxinsertsize", 1048576) # 1MB repo.maxrowsize = ui.configbytes("hgsql", "maxrowsize", 1048576) repo.sqlconn = None repo.sqlcursor = None repo.disablesync = False repo.pendingrevs = [] repo.heldlocks = set() repo.sqlpostrelease = [] repo._issyncing = False repo.__class__ = sqllocalrepo class bufferedopener(object): """Opener implementation that buffers all writes in memory until flush or close is called. """ def __init__(self, opener, path, mode): self.opener = opener self.path = path self.mode = mode self.buffer = [] self.closed = False def write(self, value): if self.closed: raise Exception("attempted to write to a closed bufferedopener") self.buffer.append(value) def flush(self): buffer = self.buffer self.buffer = [] if buffer: fp = self.opener(self.path, self.mode) fp.write(''.join(buffer)) fp.close() def close(self): self.flush() self.closed = True def addentries(repo, queue, transaction): """Reads new rev entries from a queue and writes them to a buffered revlog. At the end it flushes all the new data to disk. """ opener = repo.svfs revlogs = {} def writeentry(revdata): # Instantiates pseudo-revlogs for us to write data directly to path, chunk, chunkcount, link, entry, data0, data1 = revdata revlog = revlogs.get(path) if not revlog: revlog = EntryRevlog(opener, path) revlogs[path] = revlog # Replace the existing openers with buffered ones so we can # perform the flush to disk all at once at the end. if not hasattr(revlog, 'ifh') or revlog.ifh.closed: dfh = None if not revlog._inline: dfh = bufferedopener(opener, revlog.datafile, "a+") ifh = bufferedopener(opener, revlog.indexfile, "a+") revlog.ifh = ifh revlog.dfh = dfh revlog.addentry(transaction, revlog.ifh, revlog.dfh, entry, data0, data1) leftover = None exit = False # Read one linkrev at a time from the queue while not exit: currentlinkrev = -1 revisions = [] if leftover: revisions.append(leftover) leftover = None # Read everything from the current linkrev while True: revdata = queue.get() if not revdata: exit = True break # The background thread had an exception, rethrow from the # foreground thread. if isinstance(revdata, Exception): raise revdata linkrev = revdata[3] if currentlinkrev == -1: currentlinkrev = linkrev if linkrev == currentlinkrev: revisions.append(revdata) elif linkrev < currentlinkrev: raise CorruptionException("SQL data is not in linkrev order") else: leftover = revdata currentlinkrev = linkrev break if not revisions: continue for revdata in revisions: writeentry(revdata) # Flush filelogs, then manifest, then changelog changelog = revlogs.pop("00changelog.i", None) manifest = revlogs.pop("00manifest.i", None) def flushrevlog(revlog): if not revlog.ifh.closed: revlog.ifh.flush() if revlog.dfh and not revlog.dfh.closed: revlog.dfh.flush() for filelog in revlogs.itervalues(): flushrevlog(filelog) if manifest: flushrevlog(manifest) if changelog: flushrevlog(changelog) class EntryRevlog(revlog.revlog): """Pseudo-revlog implementation that allows applying data directly to the end of the revlog. """ def __init__(self, opener, path): super(EntryRevlog, self).__init__(opener, path) # This is a copy of the changelog init implementation. # It hard codes no generaldelta. if path == '00changelog.i' and self._initempty: self.version &= ~revlog.REVLOGGENERALDELTA self._generaldelta = False def addentry(self, transaction, ifh, dfh, entry, data0, data1): curr = len(self) offset = self.end(curr - 1) e = struct.unpack(revlog.indexformatng, entry) offsettype, datalen, textlen, base, link, p1r, p2r, node = e # The first rev has special metadata encoded in it that should be # stripped before being added to the index. if curr == 0: elist = list(e) type = revlog.gettype(offsettype) offsettype = revlog.offset_type(0, type) elist[0] = offsettype e = tuple(elist) # Verify that the rev's parents and base appear earlier in the revlog if p1r >= curr or p2r >= curr: raise CorruptionException("parent revision is not in revlog: %s" % self.indexfile) if base > curr: raise CorruptionException("base revision is not in revlog: %s" % self.indexfile) expectedoffset = revlog.getoffset(offsettype) if expectedoffset != 0 and expectedoffset != offset: raise CorruptionException("revision offset doesn't match prior length " + "(%s offset vs %s length): %s" % (expectedoffset, offset, self.indexfile)) if node not in self.nodemap: self.index.insert(-1, e) self.nodemap[node] = len(self) - 1 if not self._inline: transaction.add(self.datafile, offset) transaction.add(self.indexfile, curr * len(entry)) if data0: dfh.write(data0) dfh.write(data1) ifh.write(entry) else: offset += curr * self._io.size transaction.add(self.indexfile, offset, curr) ifh.write(entry) ifh.write(data0) ifh.write(data1) self.checkinlinesize(transaction, ifh) def addgroup(orig, self, bundle, linkmapper, transaction, addrevisioncb=None): """Copy paste of revlog.addgroup, but we ensure that the revisions are added in linkrev order. """ if not util.safehasattr(transaction, "repo"): return orig(self, bundle, linkmapper, transaction, addrevisioncb=addrevisioncb) # track the base of the current delta log content = [] node = None r = len(self) end = 0 if r: end = self.end(r - 1) ifh = self.opener(self.indexfile, "a+") isize = r * self._io.size if self._inline: transaction.add(self.indexfile, end + isize, r) dfh = None else: transaction.add(self.indexfile, isize, r) transaction.add(self.datafile, end) dfh = self.opener(self.datafile, "a+") try: # loop through our set of deltas chunkdatas = [] chunkmap = {} lastlinkrev = -1 reorder = False # Read all of the data from the stream chain = None while True: chunkdata = bundle.deltachunk(chain) if not chunkdata: break node = chunkdata['node'] cs = chunkdata['cs'] link = linkmapper(cs) if link < lastlinkrev: reorder = True lastlinkrev = link chunkdatas.append((link, chunkdata)) chunkmap[node] = chunkdata chain = node # If we noticed a incoming rev was not in linkrev order # we reorder all the revs appropriately. if reorder: chunkdatas = sorted(chunkdatas) fulltexts = {} def getfulltext(node): if node in fulltexts: return fulltexts[node] if node in self.nodemap: return self.revision(node) chunkdata = chunkmap[node] deltabase = chunkdata['deltabase'] delta = chunkdata['delta'] deltachain = [] currentbase = deltabase while True: if currentbase in fulltexts: deltachain.append(fulltexts[currentbase]) break elif currentbase in self.nodemap: deltachain.append(self.revision(currentbase)) break elif currentbase == nullid: break else: deltachunk = chunkmap[currentbase] currentbase = deltachunk['deltabase'] deltachain.append(deltachunk['delta']) prevtext = deltachain.pop() while deltachain: prevtext = mdiff.patch(prevtext, deltachain.pop()) fulltext = mdiff.patch(prevtext, delta) fulltexts[node] = fulltext return fulltext visited = set() prevnode = self.node(len(self) - 1) for link, chunkdata in chunkdatas: node = chunkdata['node'] deltabase = chunkdata['deltabase'] if (not deltabase in self.nodemap and not deltabase in visited): fulltext = getfulltext(node) ptext = getfulltext(prevnode) delta = mdiff.textdiff(ptext, fulltext) chunkdata['delta'] = delta chunkdata['deltabase'] = prevnode prevnode = node visited.add(node) # Apply the reordered revs to the revlog for link, chunkdata in chunkdatas: node = chunkdata['node'] p1 = chunkdata['p1'] p2 = chunkdata['p2'] cs = chunkdata['cs'] deltabase = chunkdata['deltabase'] delta = chunkdata['delta'] content.append(node) link = linkmapper(cs) if node in self.nodemap: # this can happen if two branches make the same change continue for p in (p1, p2): if p not in self.nodemap: raise LookupError(p, self.indexfile, _('unknown parent')) if deltabase not in self.nodemap: raise LookupError(deltabase, self.indexfile, _('unknown delta base')) baserev = self.rev(deltabase) chain = self._addrevision(node, None, transaction, link, p1, p2, revlog.REVIDX_DEFAULT_FLAGS, (baserev, delta), ifh, dfh) if addrevisioncb: # Data for added revision can't be read unless flushed # because _loadchunk always opensa new file handle and # there is no guarantee data was actually written yet. if dfh: dfh.flush() ifh.flush() addrevisioncb(self, chain) if not dfh and not self._inline: # addrevision switched from inline to conventional # reopen the index ifh.close() dfh = self.opener(self.datafile, "a+") ifh = self.opener(self.indexfile, "a+") finally: if dfh: dfh.close() ifh.close() return content def bookmarkcommand(orig, ui, repo, *names, **opts): if not issqlrepo(repo): return orig(ui, repo, *names, **opts) write = (opts.get('delete') or opts.get('rename') or opts.get('inactive') or names) def _bookmarkcommand(): return orig(ui, repo, *names, **opts) if write: return executewithsql(repo, _bookmarkcommand, True) else: return _bookmarkcommand() def pushkey(orig, repo, proto, namespace, key, old, new): if issqlrepo(repo): def commitpushkey(): return orig(repo, proto, namespace, key, old, new) return executewithsql(repo, commitpushkey, namespace == 'bookmarks') else: return orig(repo, proto, namespace, key, old, new) # recover must be a norepo command because loading the repo fails @command('^sqlrecover', [ ('f', 'force', '', _('strips as far back as necessary'), ''), ('', 'no-backup', '', _('does not produce backup bundles for strips'), ''), ], _('hg sqlrecover'), norepo=True) def sqlrecover(ui, *args, **opts): """ Strips commits from the local repo until it is back in sync with the SQL server. """ global initialsync initialsync = INITIAL_SYNC_DISABLE repo = hg.repository(ui, ui.environ['PWD']) repo.disablesync = True if repo.recover(): ui.status("recovered from incomplete transaction") def iscorrupt(): repo.sqlconnect() try: repo.syncdb() except: return True finally: repo.sqlclose() return False reposize = len(repo) stripsize = 10 while iscorrupt() and len(repo) > 0: if not opts.get('force') and reposize > len(repo) + 10000: ui.warn("unable to fix repo after stripping 10000 commits " + "(use -f to strip more)") striprev = max(0, len(repo) - stripsize) nodelist = [repo[striprev].node()] ui.status("stripping back to %s commits" % (striprev)) backup = "none" if opts.get("no-backup") else "all" repair.strip(ui, repo, nodelist, backup=backup, topic="sqlrecover") stripsize = min(stripsize * 5, 10000) if len(repo) == 0: ui.warn(_("unable to fix repo corruption\n")) elif len(repo) == reposize: ui.status(_("local repo was not corrupt - no action taken\n")) else: ui.status(_("local repo now matches SQL\n")) @command('^sqlstrip', [ ('', 'i-know-what-i-am-doing', None, _('only run sqlstrip if you know ' + 'exactly what you\'re doing')), ], _('hg sqlstrip [OPTIONS] REV'), norepo=True) def sqlstrip(ui, rev, *args, **opts): """strips all revisions greater than or equal to the given revision from the sql database Deletes all revisions with linkrev >= the given revision from the local repo and from the sql database. This is permanent and cannot be undone. Once the revisions are deleted from the database, you will need to run this command on each master server before proceeding to write new revisions. """ if not opts.get('i_know_what_i_am_doing'): raise util.Abort("You must pass --i-know-what-i-am-doing to run this " + "command. If you have multiple servers using the database, this " + "command will break your servers until you run it on each one. " + "Only the Mercurial server admins should ever run this.") ui.warn("*** YOU ARE ABOUT TO DELETE HISTORY (MANDATORY 5 SECOND WAIT) ***\n") import time time.sleep(5) global initialsync initialsync = INITIAL_SYNC_DISABLE repo = hg.repository(ui, ui.environ['PWD']) repo.disablesync = True try: rev = int(rev) except ValueError: raise util.Abort("specified rev must be an integer: '%s'" % rev) wlock = lock = None wlock = repo.wlock() lock = repo.lock() try: repo.sqlconnect() try: repo.sqllock(writelock) if rev not in repo: raise util.Abort("revision %s is not in the repo" % rev) reponame = repo.sqlreponame cursor = repo.sqlcursor changelog = repo.changelog revs = repo.revs('%s:' % rev) # strip locally ui.status("stripping locally\n") repair.strip(ui, repo, [changelog.node(r) for r in revs], "all") ui.status("stripping from the database\n") ui.status("deleting old references\n") cursor.execute("""DELETE FROM revision_references WHERE repo = %s""", (reponame,)) ui.status("adding new head references\n") for head in repo.heads(): cursor.execute("""INSERT INTO revision_references(repo, namespace, value) VALUES(%s, 'heads', %s)""", (reponame, hex(head))) ui.status("adding new tip reference\n") cursor.execute("""INSERT INTO revision_references(repo, namespace, name, value) VALUES(%s, 'tip', 'tip', %s)""", (reponame, len(repo) - 1)) ui.status("adding new bookmark references\n") for k, v in repo._bookmarks.iteritems(): cursor.execute("""INSERT INTO revision_references(repo, namespace, name, value) VALUES(%s, 'bookmarks', %s, %s)""", (reponame, k, hex(v))) ui.status("deleting revision data\n") cursor.execute("""DELETE FROM revisions WHERE repo = %s and linkrev > %s""", (reponame, rev)) repo.sqlconn.commit() finally: repo.sqlunlock(writelock) repo.sqlclose() finally: if lock: lock.release() if wlock: wlock.release() class CustomConverter(mysql.connector.conversion.MySQLConverter): """Ensure that all values being returned are returned as python string (versus the default byte arrays).""" def _STRING_to_python(self, value, dsc=None): return str(value) def _VAR_STRING_to_python(self, value, dsc=None): return str(value) def _BLOB_to_python(self, value, dsc=None): return str(value)