os.link() issues with Windows + ReFS

[waxhell]

linklockfile.py does not detect potential issues when working with ReFS volumes (Storage Spaces) in Windows 8.1 / Windows Server 2008 R2. ReFS does not support hard links.

Without a timeout passed to acquire(), the script will get stuck repeatedly retrying an operation that can never succeed on a ReFS volume.

Discovered when trying to troubleshoot issues with pip hanging in this specific environment.

https://github.com/pypa/pip/issues/2993

I:\>pip list

Ctrl-C

Traceback (most recent call last):
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\_vendor\lockfile\linkl
ockfile.py", line 30, in acquire
    os.link(self.unique_name, self.lock_file)
OSError: [WinError 50] The request is not supported: 'I:\\Users\\[[USER NAME REMOVED]]\\AppData\
\Local\\pip\\Cache\\[[COMPUTER NAME REMOVED]]-1d14.781968199621979134564595' -> 'I:\\Users\
\[[USER NAME REMOVED]]\\AppData\\Local\\pip\\Cache\\selfcheck.json.lock'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:\Program Files\Python 3.5\lib\runpy.py", line 170, in _run_module_as_m
ain
    "__main__", mod_spec)
  File "C:\Program Files\Python 3.5\lib\runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "C:\Program Files\Python 3.5\Scripts\pip.exe\__main__.py", line 9, in <mo
dule>
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\__init__.py", line 217
, in main
    return command.main(cmd_args)
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\basecommand.py", line
220, in main
    pip_version_check(session)
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\utils\outdated.py", li
ne 134, in pip_version_check
    state.save(pypi_version, current_time)
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\utils\outdated.py", li
ne 71, in save
    with lockfile.LockFile(self.statefile_path):
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\_vendor\lockfile\__ini
t__.py", line 238, in __enter__
    self.acquire()
  File "C:\Program Files\Python 3.5\lib\site-packages\pip\_vendor\lockfile\linkl
ockfile.py", line 49, in acquire
    time.sleep(timeout is not None and timeout/10 or 0.1)
KeyboardInterrupt

[Ben Nemec (bnemec)]

pylockfile has been retired. We won't be making any more updates to it. See the fasteners library for a supported alternative.