comparison mercurial/pathutil.py @ 44865:233ee525dcef

grep: reduce the cost of pathauditor checks when grepping working copy

Running `time hg grep zxczxczxczxczxc -l` on mozilla-central:

before:
  real	0m20,000s
  user	0m15,796s
  sys	0m4,189s

after:
  real	0m10,903s
  user	0m8,964s
  sys	0m1,916s

if vfs didn't call pathauditor at all:
  real	0m7,781s
  user	0m5,968s
  sys	0m1,790s

Differential Revision: https://phab.mercurial-scm.org/D8582

44864:06105aa8bc0e

from __future__ import absolute_import

import errno
import os
import posixpath
import stat

        try:
            self(path)
            return True
        except (OSError, error.Abort):
            return False


def canonpath(root, cwd, myname, auditor=None):
    '''return the canonical path of myname, given cwd and root

44865:233ee525dcef

from __future__ import absolute_import

import contextlib
import errno
import os
import posixpath
import stat

        try:
            self(path)
            return True
        except (OSError, error.Abort):
            return False

    @contextlib.contextmanager
    def cached(self):
        if self._cached:
            yield
        else:
            try:
                self._cached = True
                yield
            finally:
                self.audited.clear()
                self.auditeddir.clear()
                self._cached = False


def canonpath(root, cwd, myname, auditor=None):
    '''return the canonical path of myname, given cwd and root