bug#57786: 28.1; run-python fails when using tramp-sshfs

bug#57786: 28.1; run-python fails when using tramp-sshfs

[sbaugh]

1. Open a remote Python file with /sshfs:hostname:/path/to/file.py
2. Hit C-c C-p (run-python) to start a Python REPL
3. Observe a failure with the message:
tramp-send-string: Process *tramp/sshfs earth* not running



In GNU Emacs 28.1 (build 1, x86_64-pc-linux-gnu, X toolkit, cairo version 1.16.0, Xaw scroll bars)
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: NixOS 21.11 (Porcupine)

Configured using:
 'configure
 --prefix=/nix/store/mdi1yi5y3nnm2bwm34qv41nxgpnvqb2s-emacs-28.1
 --disable-build-details --with-modules --with-x-toolkit=lucid
 --with-xft --with-cairo'

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Important settings:
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  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

bug#57786: 28.1; run-python fails when using tramp-sshfs

[Michael Albinus]

sbaugh@catern.com writes:

Hi,

> 1. Open a remote Python file with /sshfs:hostname:/path/to/file.py
> 2. Hit C-c C-p (run-python) to start a Python REPL
> 3. Observe a failure with the message:
> tramp-send-string: Process *tramp/sshfs earth* not running

I can reproduce it with Emacs 28.1, 28.2 and 29.0.50.

However, it seems that this isn't supported by python.el. It uses
internal Tramp functions from tramp-sh.el, so it is unlikely it will run
over an sshfs connection.

Perhaps an error message from python.el is needed, saying "Remote
connection `sshfs' isn't supported for processes". or alike.

Best regards, Michael.

bug#57786: 28.1; run-python fails when using tramp-sshfs

[Spencer Baugh]

Michael Albinus <michael.albinus@gmx.de> writes:
> sbaugh@catern.com writes:
>> 1. Open a remote Python file with /sshfs:hostname:/path/to/file.py
>> 2. Hit C-c C-p (run-python) to start a Python REPL
>> 3. Observe a failure with the message:
>> tramp-send-string: Process *tramp/sshfs earth* not running
>
> I can reproduce it with Emacs 28.1, 28.2 and 29.0.50.
>
> However, it seems that this isn't supported by python.el. It uses
> internal Tramp functions from tramp-sh.el, so it is unlikely it will run
> over an sshfs connection.
>
> Perhaps an error message from python.el is needed, saying "Remote
> connection `sshfs' isn't supported for processes". or alike.

Seems like a bug in python.el then; the sshfs TRAMP method has better
performance than the ssh method, so it would be nice to be able to use
it when editing Python files...

bug#57786: 28.1; run-python fails when using tramp-sshfs

[Michael Albinus]

Spencer Baugh <sbaugh@catern.com> writes:

Hi Spencer,

>>> 1. Open a remote Python file with /sshfs:hostname:/path/to/file.py
>>> 2. Hit C-c C-p (run-python) to start a Python REPL
>>> 3. Observe a failure with the message:
>>> tramp-send-string: Process *tramp/sshfs earth* not running
>>
>> I can reproduce it with Emacs 28.1, 28.2 and 29.0.50.
>>
>> However, it seems that this isn't supported by python.el. It uses
>> internal Tramp functions from tramp-sh.el, so it is unlikely it will run
>> over an sshfs connection.
>>
>> Perhaps an error message from python.el is needed, saying "Remote
>> connection `sshfs' isn't supported for processes". or alike.
>
> Seems like a bug in python.el then; the sshfs TRAMP method has better
> performance than the ssh method, so it would be nice to be able to use
> it when editing Python files...

Perhaps. I'm adding Fabián and Augusto to Cc.

Note that there were discsussions in the emacs-devel ML to "normalize"
the Tramp use in Python. This is mainly stalled, because I have no real
insight what Python needs.

Best regards, Michael.