Some tarballs dont create new directories.
This can be bad news.
I recently did a rm -rf `tar tvfz blah.tgz` on a tarball
that had contained ./ and had made a mess in the cwd
Luckily, the "v" saved me, as I assume rm -rf ./ would be pretty bad.
In my haste, I have not considered how your code would handle
this, but it might be good to check.
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