Eglot Failed to completion for commands defined in specified loaded packages for auctex.

Eglot Failed to completion for commands defined in specified loaded packages for auctex.

[Hongyi Zhao]

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On Ubuntu 20.04, I installed auctex, eglot, company, yasnippet into
Emacs through straight as shown below:

```emacs-lisp
(straight-use-package
 `( auctex :type git :host nil :repo
"https://git.savannah.gnu.org/git/auctex.git"
    :pre-build ,(pcase system-type
                (`berkeley-unix '("gmake"))
                (_ '(
                    ;("bash" "-c" "cd ~/.emacs.d/straight/repos/auctex")
                    ("./autogen.sh")
                    ("./configure" "--without-texmf-dir" "--with-lispdir=.")
                    ("make")
                    )))))
     (setq TeX-data-directory (straight--repos-dir "auctex")
           TeX-lisp-directory TeX-data-directory)

     (eval-after-load 'info
        '(add-to-list 'Info-additional-directory-list
                      (concat (straight--repos-dir "auctex") "doc")))

(load "auctex.el" nil t t)
(load "preview-latex.el" nil t t)
(setq TeX-auto-save t)
(setq TeX-parse-self t)
(setq-default TeX-master nil)

(use-package company)
(add-hook 'after-init-hook 'global-company-mode)

(use-package yasnippet)
(require 'yasnippet)
(yas-reload-all)
(add-hook 'prog-mode-hook #'yas-minor-mode)

(use-package eglot)

(with-eval-after-load 'tex
  (define-key TeX-mode-map [remap TeX-complete-symbol] #'completion-at-point))
```

Then I open the following tex document in Emacs

```
\documentclass{paper}
\usepackage{braket}
\begin{document}
   Some testing comes here.
\end{document}
```

and enable Eglot (M-x eglot), but I find that Eglot Failed to do the
completion for commands defined in specified loaded packages for
auctex. But TeXstudio doesn't have this problem.

See the screenshots in attachments for more detailed info.

Regards,
-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China

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Re: Eglot Failed to completion for commands defined in specified loaded packages for auctex.

[Tassilo Horn]

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Hongyi Zhao <hongyi.zhao@gmail.com> writes:

> Then I open the following tex document in Emacs
>
> ```
> \documentclass{paper}
> \usepackage{braket}
> \begin{document}
>    Some testing comes here.
> \end{document}
> ```
>
> and enable Eglot (M-x eglot), but I find that Eglot Failed to do the
> completion for commands defined in specified loaded packages for
> auctex. But TeXstudio doesn't have this problem.

Do you know what Eglot is?  It's an LSP (Language Server Protocol)
client which requests completions, documentation, etc. from an LSP
server.  I doubt there is a LaTeX LSP server.

You can use company-mode with capf (and dabbrev) backend with auctex to
get completion popups, see this screenshot:

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That should work out of the box with no additional packages except for
company and then enabling `company-mode' in your LaTeX buffer.

Bye,
Tassilo

Re: Eglot Failed to completion for commands defined in specified loaded packages for auctex.

[Hongyi Zhao]

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On Wed, Jun 16, 2021 at 1:05 PM Tassilo Horn <tsdh@gnu.org> wrote:
>
> Hongyi Zhao <hongyi.zhao@gmail.com> writes:
>
> > Then I open the following tex document in Emacs
> >
> > ```
> > \documentclass{paper}
> > \usepackage{braket}
> > \begin{document}
> >    Some testing comes here.
> > \end{document}
> > ```
> >
> > and enable Eglot (M-x eglot), but I find that Eglot Failed to do the
> > completion for commands defined in specified loaded packages for
> > auctex. But TeXstudio doesn't have this problem.
>
> Do you know what Eglot is?  It's an LSP (Language Server Protocol)
> client which requests completions, documentation, etc. from an LSP
> server.  I doubt there is a LaTeX LSP server.
>
> You can use company-mode with capf (and dabbrev) backend with auctex to
> get completion popups, see this screenshot:

I think I have installed them, as shown in the screenshot below.

>
> That should work out of the box with no additional packages except for
> company and then enabling `company-mode' in your LaTeX buffer.
>
> Bye,
> Tassilo



-- 
Assoc. Prof. Hongyi Zhao <hongyi.zhao@gmail.com>
Theory and Simulation of Materials
Hebei Vocational University of Technology and Engineering
NO. 552 North Gangtie Road, Xingtai, China

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Re: Eglot Failed to completion for commands defined in specified loaded packages for auctex.

[Basil L. Contovounesios]

Tassilo Horn <tsdh@gnu.org> writes:

> Hongyi Zhao <hongyi.zhao@gmail.com> writes:
>
>> Then I open the following tex document in Emacs
>>
>> ```
>> \documentclass{paper}
>> \usepackage{braket}
>> \begin{document}
>>    Some testing comes here.
>> \end{document}
>> ```
>>
>> and enable Eglot (M-x eglot), but I find that Eglot Failed to do the
>> completion for commands defined in specified loaded packages for
>> auctex. But TeXstudio doesn't have this problem.

I'm guessing that's because your LSP server isn't configured or able to
do that.

> Do you know what Eglot is?  It's an LSP (Language Server Protocol)
> client which requests completions, documentation, etc. from an LSP
> server.  I doubt there is a LaTeX LSP server.

I successfully use Eglot with Digestif[1].  I would try TexLab[2] that
Joost mentioned as well but it's not as easy for me to compile it given
the version of Rust on Debian.

[1]: https://github.com/astoff/digestif
[2]: https://github.com/latex-lsp/texlab

> You can use company-mode with capf (and dabbrev) backend with auctex to
> get completion popups, see this screenshot:
>
> That should work out of the box with no additional packages except for
> company and then enabling `company-mode' in your LaTeX buffer.

Eglot also works OOTB, except for one minor detail: I have to remap
AUCTeX's binding of TeX-complete-symbol back to the default
completion-at-point, which Eglot hooks into.

-- 
Basil