Mercurial > hg > mercurial-crew-with-dirclash

comparison mercurial/util.py @ 3998:315d47991fd4

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symlinks: check whether a filesystem supports symlinks
author Matt Mackall <mpm@selenic.com>
date Fri, 29 Dec 2006 20:04:31 -0600
parents 3f0ba82c103f
children 0b740dcf0cf1
comparison
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3997:3f0ba82c103f 3998:315d47991fd4
711 '''return an is_exec() function with default to fallback''' 711 '''return an is_exec() function with default to fallback'''
712 if checkexec(path): 712 if checkexec(path):
713 return lambda x: is_exec(os.path.join(path, x)) 713 return lambda x: is_exec(os.path.join(path, x))
714 return fallback 714 return fallback
715 715
716 def checksymlink(path):
717 """check whether the given path is on a symlink-capable filesystem"""
718 # mktemp is not racy because symlink creation will fail if the
719 # file already exists
720 name = tempfile.mktemp(dir=path)
721 try:
722 os.symlink(".", name)
723 os.unlink(name)
724 return True
725 except OSError:
726 return False
727
716 # Platform specific variants 728 # Platform specific variants
717 if os.name == 'nt': 729 if os.name == 'nt':
718 import msvcrt 730 import msvcrt
719 nulldev = 'NUL:' 731 nulldev = 'NUL:'
720 732