view hg @ 14930:372d9d8b1da4

localrepo: decorate dirstate() with filecache

We refresh the stat info when releasing repo.wlock(), right after writing it.

Also, invalidate the dirstate by deleting its attribute. This will force a
stat by the decorator that actually checks if anything changed, rather than
reading it again every time.

Note that prior to this, there was a single dirstate instance created for a
localrepo. It was invalidated by calling dirstate.invalidated(), clearing
its internal attributes.

As a consequence, the following construct is no longer safe:

  ds = repo.dirstate # keep a reference to the repo's dirstate
  wlock = repo.wlock()
  try:
      ds.setparents(...)
  finally:
      wlock.release() # dirstate should be written here

Since it's possible that the dirstate was modified between lines #1 and #2,
therefore changes to the old dirstate won't get written when the lock releases,
because a new instance was created by the decorator.

#!/usr/bin/env python
#
# mercurial - scalable distributed SCM
#
# Copyright 2005-2007 Matt Mackall <[e-mail]>
#
# This software may be used and distributed according to the terms of the
# GNU General Public License version 2 or any later version.

import os
import sys

libdir = '@LIBDIR@'

if libdir != '@' 'LIBDIR' '@':
    if not os.path.isabs(libdir):
        libdir = os.path.join(os.path.dirname(os.path.realpath(__file__)),
                              libdir)
        libdir = os.path.abspath(libdir)
    sys.path.insert(0, libdir)

# enable importing on demand to reduce startup time
try:
    from mercurial import demandimport; demandimport.enable()
except ImportError:
    import sys
    sys.stderr.write("abort: couldn't find mercurial libraries in [%s]\n" %
                     ' '.join(sys.path))
    sys.stderr.write("(check your install and PYTHONPATH)\n")
    sys.exit(-1)

import mercurial.util
import mercurial.dispatch

for fp in (sys.stdin, sys.stdout, sys.stderr):
    mercurial.util.setbinary(fp)

mercurial.dispatch.run()