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Re: Long path names on Windows

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From:
demerphq
Date:
May 9, 2017 07:40
Subject:
Re: Long path names on Windows
Message ID:
CANgJU+XMWBHOkMVPAZqB1j3f0LT2urppxAmUR+2H4H48m6OL6Q@mail.gmail.com
On 9 May 2017 09:36, "Leon Timmermans" <fawaka@gmail.com> wrote:

On Tue, May 9, 2017 at 5:11 AM, Zakariyya Mughal <zaki.mughal@gmail.com>
wrote:

> Hello,
>
> Has there been any progress on supporting long path names on Windows? I
> noticed that there have been changes in Windows 10 that let you opt-in
> to bypassing the `MAX_PATH` limit by setting up a manifest and registry
> key:
>
> - <https://msdn.microsoft.com/en-us/library/aa365247(VS.85).aspx#maxpath>
> - <https://blogs.msdn.microsoft.com/jeremykuhne/2016/07/30/net
> -4-6-2-and-long-paths-on-windows-10/>
>
> (spotted on the Python bug tracker <https://bugs.python.org/issue18199>,
> <https://bugs.python.org/issue27731>).
>
> However, it seems that these changes depend on using the wide-char
> versions of the API functions. I see that there is already an issue for
> this here <https://rt.perl.org/Public/Bug/Display.html?id=60888> (and
> the associated meta issue for Unicode and system calls
> <https://rt.perl.org/Public/Bug/Display.html?id=105914>).
>
> If this can not be done yet, it might be useful to catch the error when
> calls like open() fail on Windows. Right now the output of accessing a
> long file path on Windows looks like this:
>
> ```perl
> use autodie;
> open($long_path);
> ```
>
> ```output
> Can't open('$long_path'): No such file or directory
> ```
>
> When I use built-in commands like `dir`, it tells me: `The filename or
> extension is too long.` which is more informative.
>

I agree this is highly desirable, but it is also rather difficult to
achieve. It would involve both language design challenges and
implementation challenges. I suspect this will require grant work given the
size and scope of it.


Leon,  I can understand the need for implementation details but why does it
need language changes?

Yves

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