Re: Added native support for TRAMP.

[Shigio YAMAGUCHI]

Hello,
I have put an improved version of gtags.el to the repository.
[http://cvs.savannah.gnu.org/viewvc/*checkout*/global/global/gtags.el]

Changed: Now gtags-visit-rootdir works in TRAMP mode.
Required:
  GNU Emacs version 25.1 or later (Tested on version 26).
  However, if you don't use 'gtags-visit-rootdir' then version 22 is
good enough.
Limitations:
  gtags-path-style: 'root is automatically converted to 'relative.

The reason for supporting version 25.1 or later is because "individual remote
process calls by let-binding process-environment" was first documented in this
version.

Regards,
Shigio

2021年2月27日(土) 21:45 Shigio YAMAGUCHI <shigio@gnu.org>:
>
> Hello Michael,
> It worked as expected!
>
> I've tried let-binding before, but it seems that
> environment variables are not sent when the value
> of process-environment is not changed.
>
> Anyway, it looks like I can realize 'gtags-visit-rootdir'.
> I will register the new version in the repository
> in a couple of days.
>
> Thank you very much for your polite explanation.
>
> Regards,
> Shigio
>
> 2021年2月27日(土) 19:43 Michael Albinus <michael.albinus@gmx.de>:
> >
> > Shigio YAMAGUCHI <shigio@gnu.org> writes:
> >
> > > Hello everybody,
> >
> > Hi Shigio,
> >
> > > I have put new gtags.el to the repository, which natively supports TRAMP.
> > > [http://cvs.savannah.gnu.org/viewvc/*checkout*/global/global/gtags.el]
> > > It's working somehow, can you give it a try?
> > >
> > > Required:
> > >   GNU Emacs version 22 or later (Tested on version 26).
> > > Limitations:
> > >   gtags-visit-rootdir: Does not work.
> > >   gtags-path-style: 'root is automatically converted to 'relative.
> >
> > Well, I don't use GNU Global myself, so I cannot test. But I have
> > compared your new version with an older one, lying around here. From dry
> > code reading, it seems to be OK. Some Tramp functionality could be
> > applied more simple if the backward compatibility wouldn't be up to
> > Emacs 22, but that's just a side remark.
> >
> > > By the way, I still cannot pass environment variables to the remote site
> > > using tramp mode. Can anyone please tell me how to do it?
> >
> > `tramp-remote-process-environment' is the place to use, However, it sets
> > the environment when the connection is established. When you use an
> > already running connection via `process-file', it won't help.
> >
> > Since Tramp 2.2.11 (Emacs 24.5), you can let-bind additional environment
> > variables to `process-environment', which will be used for the remote
> > process. The Tramp manual says:
> >
> > --8<---------------cut here---------------start------------->8---
> >    In addition to ‘tramp-remote-process-environment’, you can set
> > environment variables for individual remote process calls by let-binding
> > ‘process-environment’.  TRAMP applies any entries not present in the
> > global default value of ‘process-environment’ (overriding
> > ‘tramp-remote-process-environment’ settings, if they conflict).  For
> > example:
> >
> >      (let ((process-environment (cons "HGPLAIN=1" process-environment)))
> >        (process-file ...))
> >
> >    Let-binding in this way works regardless of whether the process to be
> > called is local or remote, since TRAMP would add just the ‘HGPLAIN’
> > setting and local processes would take whole value of
> > ‘process-environment’ along with the new value of ‘HGPLAIN’.
> > --8<---------------cut here---------------end--------------->8---
> >
> > > Regards,
> > > Shigio
> >
> > Best regards, Michael.
>
>
>
> --
> Shigio YAMAGUCHI <shigio@gnu.org>
> PGP fingerprint:
> 26F6 31B4 3D62 4A92 7E6F  1C33 969C 3BE3 89DD A6EB



-- 
Shigio YAMAGUCHI <shigio@gnu.org>
PGP fingerprint:
26F6 31B4 3D62 4A92 7E6F  1C33 969C 3BE3 89DD A6EB