Re: Native OS pipelines in eshell and Emacs

[Dmitry Gutov <dmitry@gutov.dev>]

Hi Michael,

On 29/05/2024 11:01, Michael Albinus wrote:
>>> 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")

The case I had in mind is when both hosts are the same. This one can be 
optimized at least in theory.