def _win32_junction(path, link, verbose=0):
"""
On older (pre 10) versions of windows we need admin privledges to make
symlinks, however junctions seem to work.
For paths we do a junction (softlink) and for files we use a hard link
Example:
>>> # xdoc: +REQUIRES(WIN32)
>>> import ubelt as ub
>>> root = ub.ensure_app_cache_dir('ubelt', 'win32_junction')
>>> ub.delete(root)
>>> ub.ensuredir(root)
>>> fpath = join(root, 'fpath.txt')
>>> dpath = join(root, 'dpath')
>>> fjunc = join(root, 'fjunc.txt')
>>> djunc = join(root, 'djunc')
>>> ub.touch(fpath)
>>> ub.ensuredir(dpath)
>>> ub.ensuredir(join(root, 'djunc_fake'))
>>> ub.ensuredir(join(root, 'djunc_fake with space'))
>>> ub.touch(join(root, 'djunc_fake with space file'))
>>> _win32_junction(fpath, fjunc)
>>> _win32_junction(dpath, djunc)
>>> # thank god colons are not allowed
>>> djunc2 = join(root, 'djunc2 [with pathological attrs]')
>>> _win32_junction(dpath, djunc2)
>>> _win32_is_junction(djunc)
>>> ub.writeto(join(djunc, 'afile.txt'), 'foo')
>>> assert ub.readfrom(join(dpath, 'afile.txt')) == 'foo'
>>> ub.writeto(fjunc, 'foo')
"""
# junctions store absolute paths
path = os.path.abspath(path)
link = os.path.abspath(link)
from ubelt import util_cmd
if os.path.isdir(path):
# try using a junction (soft link)
if verbose:
print('... as soft link')
# TODO: what is the windows api for this?
command = 'mklink /J "{}" "{}"'.format(link, path)
else:
# try using a hard link
if verbose:
print('... as hard link')
# command = 'mklink /H "{}" "{}"'.format(link, path)
try:
jwfs.link(path, link) # this seems to be allowed
except Exception:
print('Failed to hardlink link={} to path={}'.format(link, path))
raise
command = None
if command is not None:
info = util_cmd.cmd(command, shell=True)
if info['ret'] != 0:
from ubelt import util_format
print('Failed command:')
print(info['command'])
print(util_format.repr2(info, nl=1))
raise OSError(str(info))
return link
def link(self, src, dst):
fs.link(src, dst)