Re: INSIDE_EMACS and Tramp

[Stefan Monnier]

> No. The point is that it is dynamic, whether Tramp needs to add a
> substring to INSIDE_EMACS, or not. Compare
>
> --8<---------------cut here---------------start------------->8---
> (let ((default-directory "/"))
>   (inside-emacs "foo"))
>
> => "28.0.50,foo"
> --8<---------------cut here---------------end--------------->8---
>
> --8<---------------cut here---------------start------------->8---
> (let ((default-directory "/ssh::/"))
>   (inside-emacs "foo"))
>
> => "28.0.50,foo,tramp:2.5.0-pre"
> --8<---------------cut here---------------end--------------->8---

I don't understand this example: why should `inside-emacs` return
something related to Tramp just because default-directory happens to
currently point to a Tramp directory?

`inside-emacs` is only of interest when creating a subprocess, and if
that subprocess is created on a remote machine, Tramp will get a change
to add ",tramp" to it when it gets called by the
file-name-handler mechanism.

In the original situation, IIUC what happens that Eshell sets up
INSIDE_EMACS with ",eshell" then creates the process, which gets
delegated to Tramp, at which point Tramp would add ",tramp" to
INSIDE_EMACS so we'd get what we need.


        Stefan