On 3/12/19, Paul Moore <p.f.mo...@gmail.com> wrote:
>
> Do you care about case sensitivity (for example, is it important to you
> whether filenames "foo" and "FOO" map to the same file or not on
> Linux, given that they do on Windows)?
That's no longer a given in Windows, since NTFS in Windows 10 supports
case-sensitive directories that override the Windows API. For some
reason they didn't expose this as a file attribute set on the
directory, so it can only be queried using either an NT system call or
the fsutil.exe command-line program.
Our Windows filesystem code (e.g. in pathlib) that assumes
case-insensitive filename matching (e.g. via the casefold, lower, or
upper string methods) is wrong for case-sensitive directories. For
example:
>>> p = pathlib.Path('C:/CaseSensitive')
>>> os.system(f'fsutil file queryCaseSensitiveInfo "{p}"')
Case sensitive attribute on directory C:\CaseSensitive is enabled.
0
>>> (p / 'foo').touch()
>>> (p / 'FOO').touch()
>>> os.listdir(p)
['FOO', 'foo']
Due to pathlib's use of case folding in Windows, globbing "foo" and
"FOO" both match "foo":
>>> list(p.glob('foo'))
[WindowsPath('C:/CaseSensitive/foo')]
>>> list(p.glob('FOO'))
[WindowsPath('C:/CaseSensitive/foo')]
If we remove "foo", glob('FOO') no longer matches anything since it
checks for the existence of "foo" instead of "FOO":
>>> os.remove(p / 'foo')
>>> os.listdir(p)
['FOO']
>>> list(p.glob('FOO'))
[]
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