Re: command-execute: Wrong type argument: commandp, helm-command-prefix

[Platon Pronko]

On 2023-05-05 08:34, Hongyi Zhao wrote:
> Hi here,
>
> I'm using the following configuration for `helm-bibtex`:
>
> ```
> (use-package helm-bibtex
>    :init
>    (setq
>
>     ;; bibtex-completion-bibliography (directory-files-recursively
>     ;;                     (concat (getenv "HOME")
> "/texmf/bibtex/bib/local") "^[A-Za-z].+.bib$")
>
>
>     ;;bibtex-completion-library-path (concat (getenv "HOME") "/pdf")
>     ;;bibtex-completion-notes-path (concat (getenv "HOME") "/notes")
>     bibtex-completion-pdf-field "File"
>     ;;https://github.com/tmalsburg/helm-bibtex#insert-latex-cite-commands
>     bibtex-completion-cite-prompt-for-optional-arguments nil)
>
>
>    :config
>    (require 'helm-config)
>    :bind
>    (("<menu>" . helm-command-prefix)
>     :map helm-command-map
>     ("b" . helm-bibtex)
>     ("B" . helm-bibtex-with-local-bibliography)
>     ("n" . helm-bibtex-with-notes)
>     ("<menu>" . helm-resume))
>
>    :config
>    ;;https://github.com/tmalsburg/helm-bibtex#application-used-for-opening-pdfs
>    ;;https://github.com/tmalsburg/helm-bibtex/issues/386
>    (defun bibtex-completion-open-pdf-external (keys &optional fallback-action)
>      (let ((bibtex-completion-pdf-open-function
>         (lambda (fpath) (start-process "evince" "*helm-bibtex-evince*"
> "/usr/bin/evince" fpath))))
>        (bibtex-completion-open-pdf keys fallback-action)))
>
>    (helm-bibtex-helmify-action bibtex-completion-open-pdf-external
> helm-bibtex-open-pdf-external)
>
>    (helm-add-action-to-source
>     'helm-bibtex
>     '(("P" helm-bibtex-open-pdf-external "Open PDF file in external
> viewer (if present)")))
>
>    
> ;;https://github.com/tmalsburg/helm-bibtex#browser-used-for-opening-urls-and-dois
>    (setq bibtex-completion-browser-function
>      (lambda (url _) (start-process "firefox" "*firefox*" "firefox" url)))
>
>    )
> ```
>
> When I hit <menu> hey for the first time, the following error will be triggered:
>
> command-execute: Wrong type argument: commandp, helm-command-prefix
>
> If I hit this key once more, the problem doesn't appear. I'm very
> puzzled by this problem. Any tips will be appreciated.
>
> See https://github.com/tmalsburg/helm-bibtex/issues/429#issuecomment-1535010227
> for the related discussion.
>
> Regards,
> Zhao

Hi!

Can you provide a minimal test config for this issue? I tried to reproduce it 
with the following, but it doesn't throw any errors for me:

```(require 'package)
(setq package-archives '(
  ("gnu" . "http://elpa.gnu.org/packages/";)
  ("melpa" . "https://melpa.org/packages/";)))
(package-initialize)

(require 'helm)

(use-package helm-bibtex
  :init
  (setq
   bibtex-completion-bibliography (directory-files-recursively
                        (concat (getenv "HOME")
                                "/texmf/bibtex/bib/local") "^[A-Za-z].+.bib$")


   ;;bibtex-completion-library-path (concat (getenv "HOME") "/pdf")
   ;;bibtex-completion-notes-path (concat (getenv "HOME") "/notes")
   bibtex-completion-pdf-field "File"
   ;;https://github.com/tmalsburg/helm-bibtex#insert-latex-cite-commands
   bibtex-completion-cite-prompt-for-optional-arguments nil)


  :config
  (require 'helm-config)
  :bind
  (("<f8>" . helm-command-prefix)
   :map helm-command-map
   ("b" . helm-bibtex)
   ("B" . helm-bibtex-with-local-bibliography)
   ("n" . helm-bibtex-with-notes)
   ("<f8>" . helm-resume))

  :config
  (defun bibtex-completion-open-pdf-external (keys &optional fallback-action)
    (let ((bibtex-completion-pdf-open-function
       (lambda (fpath) (start-process "evince" "*helm-bibtex-evince*"
"/usr/bin/evince" fpath))))
      (bibtex-completion-open-pdf keys fallback-action)))

  (helm-bibtex-helmify-action bibtex-completion-open-pdf-external
helm-bibtex-open-pdf-external)

  (helm-add-action-to-source
   'helm-bibtex
   '(("P" helm-bibtex-open-pdf-external "Open PDF file in external
viewer (if present)")))

  
;;https://github.com/tmalsburg/helm-bibtex#browser-used-for-opening-urls-and-dois
  (setq bibtex-completion-browser-function
    (lambda (url _) (start-process "firefox" "*firefox*" "firefox" url)))

  )
```

--
Best regards,
Platon Pronko
PGP 2A62D77A7A2CB94E