localrepo.commit: grab locks before getting the list of files to commit
Somebody may change the dirstate after we've determined the parents of
the working dir and run repo.status, but before we called wlock().
This should also fix issue997, where backout would change a file without
changing its size and then call repo.commit without passing the list of
files. If this happened in less than one second, we wouldn't detect any
file changes - the in-memory dirstate still has the cached stat data for
that file. Grabbing the wlock early causes the dirstate to be
invalidated and we end up reading the dirstate file again, which has
that file marked for lookup (size == -1).
A better fix would be for backout to give repo.commit the exact list of
files, but that'll require some changes to the revert operation.
A significant user-visible change is that the precommit hook is always
run with both locks grabbed - previously, hg commit would run it before
grabbing any locks, but hg import would run it after grabbing locks.
# Mercurial extension to make it easy to refer to the parent of a revision
#
# Copyright (C) 2007 Alexis S. L. Carvalho <alexis@cecm.usp.br>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
'''\
use suffixes to refer to ancestor revisions
This extension allows you to use git-style suffixes to refer to
the ancestors of a specific revision.
For example, if you can refer to a revision as "foo", then:
- foo^N = Nth parent of foo:
foo^0 = foo
foo^1 = first parent of foo
foo^2 = second parent of foo
foo^ = foo^1
- foo~N = Nth first grandparent of foo
foo~0 = foo
foo~1 = foo^1 = foo^ = first parent of foo
foo~2 = foo^1^1 = foo^^ = first parent of first parent of foo
'''
import mercurial.repo
def reposetup(ui, repo):
if not repo.local():
return
class parentrevspecrepo(repo.__class__):
def lookup(self, key):
try:
_super = super(parentrevspecrepo, self)
return _super.lookup(key)
except mercurial.repo.RepoError:
pass
circ = key.find('^')
tilde = key.find('~')
if circ < 0 and tilde < 0:
raise
elif circ >= 0 and tilde >= 0:
end = min(circ, tilde)
else:
end = max(circ, tilde)
cl = self.changelog
base = key[:end]
try:
node = _super.lookup(base)
except mercurial.repo.RepoError:
# eek - reraise the first error
return _super.lookup(key)
rev = cl.rev(node)
suffix = key[end:]
i = 0
while i < len(suffix):
# foo^N => Nth parent of foo
# foo^0 == foo
# foo^1 == foo^ == 1st parent of foo
# foo^2 == 2nd parent of foo
if suffix[i] == '^':
j = i + 1
p = cl.parentrevs(rev)
if j < len(suffix) and suffix[j].isdigit():
j += 1
n = int(suffix[i+1:j])
if n > 2 or n == 2 and p[1] == -1:
raise
else:
n = 1
if n:
rev = p[n - 1]
i = j
# foo~N => Nth first grandparent of foo
# foo~0 = foo
# foo~1 = foo^1 == foo^ == 1st parent of foo
# foo~2 = foo^1^1 == foo^^ == 1st parent of 1st parent of foo
elif suffix[i] == '~':
j = i + 1
while j < len(suffix) and suffix[j].isdigit():
j += 1
if j == i + 1:
raise
n = int(suffix[i+1:j])
for k in xrange(n):
rev = cl.parentrevs(rev)[0]
i = j
else:
raise
return cl.node(rev)
repo.__class__ = parentrevspecrepo