Package: emacs;
Reported by: jeberger <at> free.fr
Date: Fri, 24 Feb 2023 07:40:01 UTC
Severity: normal
Found in version 27.2
Done: João Távora <joaotavora <at> gmail.com>
Bug is archived. No further changes may be made.
Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):
From: jeberger <at> free.fr To: bug-gnu-emacs <at> gnu.org Subject: 27.2; Eglot should use shell-file-name when launching the language server for a remote file Date: Fri, 24 Feb 2023 08:39:45 +0100 (CET)
From https://github.com/joaotavora/eglot/issues/1175
# Steps to reproduce:
- On the remote machine:
- Install a language server in a non-standard path (e.g. `rust-analyzer`, which installs in a subdirectory under `$HOME` and not `/usr/bin`)
- Make sure that the server is in the path for a shell other than `sh` (e.g. set the path in `.zprofile` for `zsh`).
- On the local machine:
- Open a file remotely through TRAMP
- Set `shell-file-name` to the shell you're using on the remote (e.g. `(setq shell-file-name "zsh")`)
- <key>M-x</key> `eglot`.
# Expected result:
Eglot should start
# Actual result:
Eglot asks `Enter program to execute (or <host>:<port>):`, then when I type `rust-analyzer` it fails with message `[jsonrpc] Server exited with status 127`. Looking at `eglot-events-buffer`, it is clear that eglot tried to use `sh` to start the server.
# Partial fix
The server starts correctly if I change function `eglot--cmd` to use `(or shell-file-name "sh")` instead of plain `"sh"`, e.g.:
```lisp
(defun eglot--cmd (contact)
"Helper for `eglot--connect'."
(if (file-remote-p default-directory)
;; TODO: this seems like a bug, although it’s everywhere. For
;; some reason, for remote connections only, over a pipe, we
;; need to turn off line buffering on the tty.
;;
;; Not only does this seem like there should be a better way,
;; but it almost certainly doesn’t work on non-unix systems.
(list (or shell-file-name "sh") "-c"
(string-join (cons "stty raw > /dev/null;"
(mapcar #'shell-quote-argument contact))
" "))
contact))
```
It still fails to autodetect the server and asks for the program to execute though.
----
In GNU Emacs 27.2 (build 1, x86_64-w64-mingw32)
of 2021-03-26 built on CIRROCUMULUS
Repository revision: deef5efafb70f4b171265b896505b92b6eef24e6
Repository branch: HEAD
Windowing system distributor 'Microsoft Corp.', version 10.0.19042
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