commit: move lots of commitctx outside of the repo lock

mercurial/localrepo.py

@@ -826,10 +826,9 class localrepository(repo.repository):
         If working is set, the working directory is affected.
         """
 
-        lock = self.lock()
         tr = None
         valid = 0 # don't save the dirstate if this isn't set
-        try:
+        lock = None
             commit = sorted(ctx.modified() + ctx.added())
             remove = ctx.removed()
             extra = ctx.extra().copy()
@@ -846,9 +845,10 class localrepository(repo.repository):
             xp1 = hex(p1)
             if p2 == nullid: xp2 = ''
             else: xp2 = hex(p2)
-
             self.hook("precommit", throw=True, parent1=xp1, parent2=xp2)
 
+        lock = self.lock()
+        try:
             tr = self.transaction()
             trp = weakref.proxy(tr)