Re: Native OS pipelines in eshell and Emacs

[Michael Albinus <michael.albinus@gmx.de>]

Dmitry Gutov <dmitry@gutov.dev> writes:

Hi Dmitry,

>> Unfortunately this is almost impossibly hard.  But, I actually have
>> worked extensively on doing this specific impossible thing (remote
>> process APIs that are powerful enough to do this) so I will eventually
>> try to implement them for Emacs and TRAMP.  It would allow full
>> make-process support in TRAMP as well as a make-pipe-process which
>> represents a pipe existing on a remote system.
>
> On the remote, it would be fine if the pipe is not direct between such
> processes, but goes through the shell, or maybe some other processes as
> well (maybe a temp file?). That would still be faster than doing the
> round-trip.

If both processes are on different remote hosts, you have the problem
how to transfer the tmpfile from one host to the other. You have no
knowledge how these two hosts see each other.

A special case is if both hosts are accessed via Tramp's scp method, and
you can use the tramp-use-scp-direct-remote-copying user option.
See (info "(tramp) Ssh setup")

Best regards, Michael.