GNU bug report logs - #67540
29.1; Emacs on Windows incorrectly capitalizes some environment variables

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Dave Abrahams <dave <at> boostpro.com>
Subject: bug#67540: closed (Re: bug#67540: 29.1; Emacs on Windows
 incorrectly capitalizes some environment variables)
Date: Tue, 04 Mar 2025 10:16:02 +0000

[Message part 1 (text/plain, inline)]

Your bug report

#67540: 29.1; Emacs on Windows incorrectly capitalizes some environment  variables

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 67540 <at> debbugs.gnu.org.

-- 
67540: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=67540
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

[Message part 2 (message/rfc822, inline)]

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: Dave Abrahams <dave <at> boostpro.com>, jporterbugs <at> gmail.com,
 67540-done <at> debbugs.gnu.org
Subject: Re: bug#67540: 29.1; Emacs on Windows incorrectly capitalizes some
 environment variables
Date: Tue, 4 Mar 2025 02:15:26 -0800

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: Dave Abrahams <dave <at> boostpro.com>
>> Date: Fri, 1 Dec 2023 12:34:40 -0800
>> Cc: jporterbugs <at> gmail.com, 67540 <at> debbugs.gnu.org
>>
>> You’re saying that these are ported UNIX programs that are only designed to
>> work from inside of Emma, which has changed the spelling of the environment
>> variable names?
>
> No, they are not for Emacs only.  But they expect to see PATH, and
> they compare case-sensitively with "PATH".  If you want to cater to
> swift, which doesn't recognize "PATH", but does recognize "Path", why
> not assume that there are other programs which do the opposite, and
> which will be broken by the change you propose?
>
> IOW, I don't see why we should change code that worked for decades
> because a single application implements a case-sensitive search of
> environment variables on MS-Windows, in direct contradiction of
> platform conventions, and contrary to the behavior of every other
> program I've ever used on Windows?

This is tagged wontfix, and I think the reasoning for that presented
here makes sense.

I'm therefore closing this bug report now.

[Message part 3 (message/rfc822, inline)]

From: Dave Abrahams <dave <at> boostpro.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.1; Emacs on Windows incorrectly capitalizes some environment 
 variables
Date: Wed, 29 Nov 2023 18:29:26 -0800

emacs -Q
M-! set

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).

I notice that the "ComSpec" variable is getting the same treatment

I am able to work around the problem as follows:

(defun unsetenv (var-name)
  (let ((current-prefix-arg '(4)))
	(funcall-interactively 'setenv var-name nil)))

(when (eq system-type 'windows-nt)
  (dolist (v '("Path" "ComSpec"))
          (let ((x (getenv v)))
               (unsetenv (upcase v))
               (setenv v x))))


In GNU Emacs 29.1 (build 2, x86_64-w64-mingw32) of 2023-08-02 built on
AVALON
Windowing system distributor 'Microsoft Corp.', version 10.0.22621
System Description: Microsoft Windows 10 Pro (v10.0.2009.22621.2715)

Configured using:
'configure --with-modules --without-dbus --with-native-compilation=aot
--without-compress-install --with-tree-sitter CFLAGS=-O2'

Configured features:
ACL GIF GMP GNUTLS HARFBUZZ JPEG JSON LCMS2 LIBXML2 MODULES NATIVE_COMP
NOTIFY W32NOTIFY PDUMPER PNG RSVG SOUND SQLITE3 THREADS TIFF
TOOLKIT_SCROLL_BARS TREE_SITTER WEBP XPM ZLIB

(NATIVE_COMP present but libgccjit not available)

Important settings:
  value of $LANG: ENU
  locale-coding-system: cp1252

Major mode: Dired by name

Minor modes in effect:
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  shell-dirtrack-mode: t
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  ws-butler-global-mode: t
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  line-number-mode: t
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  transient-mark-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t

Load-path shadows:
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c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-lint hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-lint
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-jump hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-jump
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-ensure hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-ensure
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-diminish hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-diminish
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-delight hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-delight
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-core hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-core
c:/Users/dave/.emacs.d.default/straight/build/use-package/use-package-bind-key hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/use-package-bind-key
c:/Users/dave/.emacs.d.default/straight/build/bind-key/bind-key hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/use-package/bind-key
c:/Users/dave/.emacs.d.default/straight/build/seq/seq hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/emacs-lisp/seq
c:/Users/dave/.emacs.d.default/straight/build/let-alist/let-alist hides c:/Program Files/Emacs/emacs-29.1/share/emacs/29.1/lisp/emacs-lisp/let-alist

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Memory information:
((conses 16 557582 44793)
(symbols 48 31897 0)
(strings 32 115342 4566)
(string-bytes 1 3994014)
(vectors 16 67230)
(vector-slots 8 1455375 78880)
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(intervals 56 18883 2260)
(buffers 984 33))

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