Re: INSIDE_EMACS and Tramp

[Federico Tedin <federicotedin@gmail.com>]

> Tramp is the obvious victim, but I don't know whether it is the only
> package which will be mentioned in combination with another package in
> INSIDE_EMACS.
>
> Furthermore, in eshell or any other package you don't see what Tramp
> sets in the remote shell. I believe we need a mechanism where different
> packages add their settings (it's not only "shell" related, epg or
> compile say something different). And when this variable is set for a
> process, there must be a way to use these cumulated settings inside of
> just the value a single package want set.
>
> In the local case, this cumulative setting might be just the package
> name like "eshell".
>
> First we shall agree a common mechanism. Something which works exactly
> for eshel and Tramp isn't sufficient.

Aah OK, so then this mechanism for generating the value for INSIDE_EMACS
needs to be more general. How about something like:

(defvar inside-emacs-extras nil)

(defun inside-emacs (&optional context)
  (mapconcat #'identity `(,emacs-version
			  ,@(when context (list context))
			  ,@inside-emacs-extras)
	     ","))

So in Eshell we would call (inside-emacs "eshell"), and Tramp could
optionally add "tramp:2.5.0-pre" to inside-emacs-extras sometime before
the function is called. Other parts of Emacs could add extras as well
(and at some point remove them, I suppose). Do you think something like
this would make sense given how Tramp works internally?