From: Dave Abrahams <dave@boostpro.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: Jim Porter <jporterbugs@gmail.com>, 67540@debbugs.gnu.org
Subject: bug#67540: 29.1; Emacs on Windows incorrectly capitalizes some environment variables
Date: Thu, 30 Nov 2023 16:13:03 -0800 [thread overview]
Message-ID: <E5E0D47A-9F09-43F5-8DCC-7D9AFFDA90D5@boostpro.com> (raw)
In-Reply-To: <83cyvr66z9.fsf@gnu.org>
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> On Nov 29, 2023, at 11:22 PM, Eli Zaretskii <eliz@gnu.org> wrote:
>
>> Date: Wed, 29 Nov 2023 19:42:46 -0800
>> From: Jim Porter <jporterbugs@gmail.com>
>>
>> On 11/29/2023 6:29 PM, Dave Abrahams wrote:
>>> Now issue the "set" command from a CMD shell. Notice that the "Path"
>>> environment variable has been renamed to "PATH" in Emacs. This renaming
>>> interferes with some tools operating correctly e.g. the swift compiler
>>> (see https://swift.org).
>>
>> This sounds like there's a bug in the Swift compiler. Environment
>> variables on MS-Windows are case-insensitive:
>> <https://learn.microsoft.com/en-us/cpp/c-runtime-library/reference/getenv-wgetenv?view=msvc-170>.
>> That documentation just covers 'getenv' (and 'wgetenv'), but I'm
>> reasonably certain the same applies to the Win32 APIs as well.
>
> Right.
>
>> It might be nice for Emacs to preserve the case of any existing
>> environment variables on MS-Windows to be on the safe side though...
>
> That's impossible in practice: we'd need to "fix" every single Lisp
> program and every place in the Emacs C code that compare against
> "PATH" case-sensitively. And what about user confusion, for those of
> us who mostly work on Unix, but sometimes need to work on Windows?
I don't think this is that hard to fix without breaking anybody. Simply maintain a mapping of in-Emacs upcased environment variable names to the lowercased counterparts from which they came, and map back when setting up a process environment.
> We decided long ago to make these letter-case changes in the Windows
> build of Emacs, and the decision held well since then. I see no
> reason to change that decision now, just because some program
> misbehaves on Windows.
“My” Windows expert told me that “Path is the correct spelling,” or I wouldn't have reported this as a bug. Still, I think you could make the workaround described above, if you wanted to accomodate my "misbehaving" tools.
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next prev parent reply other threads:[~2023-12-01 0:13 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-30 2:29 bug#67540: 29.1; Emacs on Windows incorrectly capitalizes some environment variables Dave Abrahams
2023-11-30 3:42 ` Jim Porter
2023-11-30 7:22 ` Eli Zaretskii
2023-12-01 0:13 ` Dave Abrahams [this message]
2023-12-01 7:14 ` Eli Zaretskii
2023-12-01 20:34 ` Dave Abrahams
2023-12-02 7:04 ` Eli Zaretskii
2023-12-02 16:22 ` Dave Abrahams
2023-11-30 7:10 ` Eli Zaretskii
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