bug#48444: 28.0.50; package.el wrong path for package-gnupghome-dir on win10

[Arthur Miller]

Eli Zaretskii <eliz@gnu.org> writes:

>> From: Arthur Miller <arthur.miller@live.com>
>> Cc: 48444@debbugs.gnu.org
>> Date: Sat, 15 May 2021 21:07:09 +0200
>> 
>> > You should only use MinGW executables with a MinGW Emacs.
>> 
>> Indeed, seems to have been the problem. After I manually purged
>> c:/msys64/usr/bin and c:/msys64/usr/bin from exec-path, I was able to
>> install packages and create/compile init file.
>> 
>> Any idea how it got there?
>
> How what got where?
Msys specific usr/bin and local/bin.

>> I didn't have any .bashrc or custom setuped files, everything was
>> just default as installed. It seems like path was setup by msys.
>
> Yes, installing MSYS will definitely change PATH, especially the one
> that MSYS Bash uses.

At that particular occasion I started it from mingw64 console as it
comes with msys2.

>> I see when I start new process that exec path have those and they take
>> precedence before mingw:
>> 
>> ("c:/msys64/mingw64/bin" "c:/msys64/usr/bin" "c:/msys64/mingw64/bin"
>> "C:/msys64/usr/local/bin" "C:/msys64/usr/bin" "C:/msys64/usr/bin"
>> "C:/Windows/System32" "C:/Windows" "C:/Windows/System32/Wbem"
>> "C:/Windows/System32/WindowsPowerShell/v1.0/"
>> "C:/msys64/usr/bin/site_perl" "C:/msys64/usr/bin/vendor_perl" ...)
>> 
>> Do I have any option other than to manually setq exec-path in
>> after-init-hook? 
>
> If you start Emacs from MSYS Bash, then you should look in the MSYS
> Bash startup files, perhaps in some etc directory?
>
> If you start Emacs from cmd or from a desktop shortcut, then you can
> edit the environment variables from Computer->Properties.

Yeah, I know I can set env vars in system props or via some script
:), I ment if Emacs can figure it out on it's own. It seems a bit
annoying if path will vary depending on how I start Emacs and it gives
different behaviour later on, so setq after start seems to work best for
me, at least I have total control what Emacs will see after start. 

Thanks for help.