Re: Native OS pipelines in eshell and Emacs

[Spencer Baugh <sbaugh@janestreet.com>]

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On Tue, May 28, 2024, 9:21 PM Dmitry Gutov <dmitry@gutov.dev> wrote:

> > Specifically, the new feature would be something like an :stdin argument
> > to make-process which allows a make-pipe-process (or other process) to
> > be passed as stdin, and grabs the output file descriptor from that
> > process (what Emacs would normally read) and passes it down as stdin for
> > the new process instead.
>
> It would be doubly interesting if we manage to implement it so that
> Tramp would be able to connect two processes directly without
> round-tripping the i/o from the remote host to local and back to remote.
> That's a major source of latency in project-find-regexp on remote.
>

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.

Anyway, in the short term it will probably only work efficiently for local
processes, with remote project-files having to roundtrip through the local
Emacs.

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