bug#27528: 26.0.50; load-path initialisation is wrong when Emacs is launched in batch mode from a console inside another Emacs

bug#27528: 26.0.50; load-path initialisation is wrong when Emacs is launched in batch mode from a console inside another Emacs

[Vincent Belaïche]

I consider two Emacs instance

1) instance master : it was built today (2017-06-29) from the HEAD of
   master branch. Its absolute path is
   c:/Nos_Programmes/GNU/Emacs/bin/emacs.exe

2) instance emacs-25: it was built on 2017-06-14 from the HEAD of
   emacs-25 branch. Its absolute path is
   c:/Nos_Programmes/GNU/Emacs_build20170614/bin/emacs.exe

Then I do the following two experiments :

1) The EMACS environment variable points at Emacs instance master,
   c:/Nos_Programmes/GNU/Emacs/bin/emacs.exe.

2) From an MSYS bash console, outside Emacs, I launch the following
command:

--8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
$EMACS --batch -Q --eval '(princ load-path)' \
  > /tmp/load-path-outside-other-emacs.txt 2>&1
--8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----

The content of load-path-outside-other-emacs.txt is as follows (all the
content is stdout):

--8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
(c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/vc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/url c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/textmodes c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/progmodes c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/play c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/org c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/nxml c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/net c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/mh-e c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/mail c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/leim c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/language c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/international c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/image c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/gnus c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/eshell c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/erc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/emulation c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/emacs-lisp c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/cedet c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/calendar c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/calc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/obsolete)--8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----

To me this output is correct.

3) From a DOS shell inside emacs-25 instance, launched by `M-x shell', I
launch the following command, that is equivalent to the first one:

--8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
%EMACS% --batch -Q --eval "(princ load-path)" ^
   > %TEMP%\load-path-inside-emacs-dos.txt 2>&1
--8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----

Then I get the following output:

--8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
(c:/Nos_Programmes/GNU/Emacs_build20170614/share/emacs/26.0.50/lisp)Warning: arch-dependent data dir 'c:/Nos_Programmes/GNU/Emacs_build20170614/libexec/emacs/26.0.50/i686-pc-mingw32/': Permission denied
Warning: Lisp directory 'c:/Nos_Programmes/GNU/Emacs_build20170614/share/emacs/26.0.50/lisp': Invalid argument
Warning: Could not find simple.el or simple.elc
--8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----

The text up to `)' is stdout, and the remainder is stderr. To me this
output is wrong.

Please note that this has nothing to do with console being DOS or MSYS,
but it has to do with. I did the experiment the other way out (using a
DOS console outside Emacs, and an MSYS console inside Emacs). I get the
correct output when launching the command from outside Emacs, and the
wrong output when launching the command from inside another instance of
Emacs.

VBR,
	Vincent.

---
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bug#27528: 26.0.50; load-path initialisation is wrong when Emacs is launched in batch mode from a console inside another Emacs

[Eli Zaretskii]

> From: vincent.belaiche@gmail.com (Vincent Belaïche)
> Date: Thu, 29 Jun 2017 12:30:37 +0200
> Cc: Vincent Belaïche <vincent.belaiche@gmail.com>
> 
> The content of load-path-outside-other-emacs.txt is as follows (all the
> content is stdout):
> 
> --8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
> (c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/vc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/url c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/textmodes c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/progmodes c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/play c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/org c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/nxml c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/net c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/mh-e c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/mail c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/leim c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/language c:/Nos_Programmes/GNU/Emacs/share/emacs
 /26.0.50/lisp/international c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/image c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/gnus c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/eshell c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/erc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/emulation c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/emacs-lisp c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/cedet c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/calendar c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/calc c:/Nos_Programmes/GNU/Emacs/share/emacs/26.0.50/lisp/obsolete)--8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----
> 
> To me this output is correct.
> 
> 3) From a DOS shell inside emacs-25 instance, launched by `M-x shell', I
> launch the following command, that is equivalent to the first one:
> 
> --8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
> %EMACS% --batch -Q --eval "(princ load-path)" ^
>    > %TEMP%\load-path-inside-emacs-dos.txt 2>&1 
> --8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----
> 
> Then I get the following output:
> 
> --8<----8<----8<----8<----8<-- begin -->8---->8---->8---->8---->8----
> (c:/Nos_Programmes/GNU/Emacs_build20170614/share/emacs/26.0.50/lisp)Warning: arch-dependent data dir 'c:/Nos_Programmes/GNU/Emacs_build20170614/libexec/emacs/26.0.50/i686-pc-mingw32/': Permission denied
> Warning: Lisp directory 'c:/Nos_Programmes/GNU/Emacs_build20170614/share/emacs/26.0.50/lisp': Invalid argument
> Warning: Could not find simple.el or simple.elc
> --8<----8<----8<----8<----8<--  end  -->8---->8---->8---->8---->8----
> 
> The text up to `)' is stdout, and the remainder is stderr. To me this
> output is wrong.

I think this is because Emacs 25 exports to the environment of the
subordinate Emacs its value of emacs_dir, which then points the
subordinate Emacs at the directory where Emacs 25 lives.

Emacs 26 fixed that problem, AFAIR, so I think if you do it the other
way around, i.e. invoke Emacs 25 from inside Emacs 26, you will see
the expected behavior.

bug#27528: 26.0.50; load-path initialisation is wrong when Emacs is launched in batch mode from a console inside another Emacs

[Vincent Belaïche]

Le 29/06/2017 à 16:27, Eli Zaretskii a écrit :
>> From: vincent.belaiche@gmail.com (Vincent Belaïche)
>> Date: Thu, 29 Jun 2017 12:30:37 +0200
>> Cc: Vincent Belaïche <vincent.belaiche@gmail.com>
>>

[...]

>>
>> The text up to `)' is stdout, and the remainder is stderr. To me this
>> output is wrong.
>
> I think this is because Emacs 25 exports to the environment of the
> subordinate Emacs its value of emacs_dir, which then points the
> subordinate Emacs at the directory where Emacs 25 lives.
>
> Emacs 26 fixed that problem, AFAIR, so I think if you do it the other
> way around, i.e. invoke Emacs 25 from inside Emacs 26, you will see
> the expected behavior.

Dear Eli,

As suggested by you, I have done the experiment of launching an Emacs 25
from inside an Emacs 26, and I got the expected behaviour.

Thank you for your kind feedback, this one can be closed.

  Vincent.

---
L'absence de virus dans ce courrier électronique a été vérifiée par le logiciel antivirus Avast.
https://www.avast.com/antivirus

bug#27528: 26.0.50; load-path initialisation is wrong when Emacs is launched in batch mode from a console inside another Emacs

[Eli Zaretskii]

> From: vincent.belaiche@gmail.com (Vincent Belaïche)
> Cc: Vincent Belaïche <vincent.belaiche@gmail.com> ,
>  27528@debbugs.gnu.org
> Date: Fri, 30 Jun 2017 14:45:24 +0200
> 
> > I think this is because Emacs 25 exports to the environment of the
> > subordinate Emacs its value of emacs_dir, which then points the
> > subordinate Emacs at the directory where Emacs 25 lives.
> >
> > Emacs 26 fixed that problem, AFAIR, so I think if you do it the other
> > way around, i.e. invoke Emacs 25 from inside Emacs 26, you will see
> > the expected behavior.
> 
> Dear Eli,
> 
> As suggested by you, I have done the experiment of launching an Emacs 25
> from inside an Emacs 26, and I got the expected behaviour.
> 
> Thank you for your kind feedback, this one can be closed.

Thanks, closing.