Riccardo Murri <riccardo.mu...@gmail.com> added the comment:
> you should be handling errors properly in the first place,
> e.g. by changing your mount_sshfs manager to:
>
> @contextmanager
> def mount_sshfs(localdir, remote):
> subprocess.run(f"sshfs {remote} {localdir}")
> try:
> yield
> finally:
> subprocess.run(f"fusermount -u {localdir}", check=True)
>
> so it actually performed the guaranteed cleanup you expected from it.
This would fix the case where errors occur in the "yield" part of the
`mount_sshfs` context manager, but would not protect from errors *in
the `fusermount -u` call itself*: if `fusermount -u` fails and throws
an exception, the entire mounted filesystem will be erased.
I would contend that, in general, `TemporaryDirectory.cleanup()`
should stop at filesystem boundaries and not descend filesystems
mounted in the temporary directory tree (whether the mount has been
done via a context manager as in the example above or by any other
means is irrelevant).
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue36422>
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