def symlink(path, target):
""" Create a symbolic link.
Determines if a link in the destination already exists, and if it does,
updates its target. If the destination exists but is not a link, throws an
exception. If the link does not exist, it is created.
"""
if not os.path.islink(path):
if os.path.exists(path):
raise Exception('%s exists - Cannot create symlink' % path)
dir = os.path.dirname(path)
if not os.path.exists(dir):
make_dir(dir)
elif os.readlink(path) != target:
log.trace('Unlinking %s because its target is changing' % path)
os.unlink(path)
if not os.path.lexists(path):
log.trace('Linking %s to %s' % (path, target))
os.symlink(target, path)
def symlink(path, target):
""" Create a symbolic link.
Determines if a link in the destination already exists, and if it does,
updates its target. If the destination exists but is not a link, throws an
exception. If the link does not exist, it is created.
"""
if not os.path.islink(path):
if os.path.exists(path):
raise Exception('%s exists - Cannot create symlink' % path)
dir = os.path.dirname(path)
if not os.path.exists(dir):
make_dir(dir)
elif os.readlink(path) != target:
log.trace('Unlinking %s because its target is changing' % path)
os.unlink(path)
if not os.path.lexists(path):
log.trace('Linking %s to %s' % (path, target))
os.symlink(target, path)
def make_dir(dir):
""" Create a directory recursively, if it does not exist. """
if not os.path.exists(dir):
log.trace('Creating directory %s' % dir)
os.makedirs(dir)
def make_dir(dir):
""" Create a directory recursively, if it does not exist. """
if not os.path.exists(dir):
log.trace('Creating directory %s' % dir)
os.makedirs(dir)
