Re: Suggest improve emacs setting in 'The Perfect Setup'

[Joshua Branson <jbranso@dismail.de>]

Feng Shu <tumashu@163.com> writes:

> Hello:
>
> In 'The Perfect Setup', we suggest user to use the below emacs config:
>
> ```
> ;; Assuming the Guix checkout is in ~/src/guix.
> (with-eval-after-load 'geiser-guile
>   (add-to-list 'geiser-guile-load-path "~/src/guix"))
> ```
>
> This config need user to deal with %load-path of guix, which seem to be
> a hard job for new guile user for many dirs of guix and other guix channels,
> why not suggest new user to use the below config:
>

How about you go ahead and make a patch on guix-patches@gnu.org, that
way this issue is not forgotten?

>
> ```
> (setq geiser-guile-binary (list "guix" "repl"))
> ```
>
>
> or:
>
> ```
> (setq geiser-guile-binary (list "guix" "repl" "-L" "/path/to/user-own-config-dir"))
> ```
>
> when user just want to develop his own guix config, just run:
>
> ```
> emacs
> ```
>
> guix and other channels installed by 'guix pull' will be used properly.
>
> when user want to develop in guix.git, he just run emacs like the below:
>
> ```
> ./pre-inst-env emacs
> ```
>
> The below is my guix emacs config, seem to work:
>
> --------------------------------------------------------------------------------
>
> (require 'geiser)
> (require 'geiser-guile)
> (require 'guix)
> (require 'magit)
>
> ;; ** My own guix config.
> (defvar eh-geeguix-dir (expand-file-name "~/geeguix"))
>
> ;; ** Let geiser-guile use 'guix repl'
> (setq geiser-guile-binary (list "guix" "repl" "-L" eh-geeguix-dir))
>
> ;; ** guix-devel-mode
> (add-hook 'scheme-mode-hook #'guix-devel-mode)
>
> ;; ** Get guix dir installed by 'guix pull'.
> (defun eh-guix-dir ()
>   (file-name-as-directory
>    (cl-find-if
>     (lambda (dir)
>       (file-exists-p (expand-file-name "guix.scm" dir)))
>     (directory-files
>      (expand-file-name "~/.cache/guix/checkouts/")
>      t))))
>
> ;; ** copyright-update
> (when (eh-guix-dir)
>   (let* ((dir (eh-guix-dir))
>          (file (expand-file-name "etc/copyright.el" dir)))
>     (when (file-exists-p file)
>       (load-file file)
>       ;; (add-hook 'after-save-hook 'copyright-update)
>       (setq copyright-names-regexp
>             (format "%s <%s>" user-full-name user-mail-address)))))
>
> ;; ** tempel
> (when (eh-guix-dir)
>   (let* ((dir (eh-guix-dir))
>          (path (expand-file-name "etc/snippets/tempel/*" dir)))
>     (add-to-list 'tempel-path path)))

I would also add:

(add-hook! 'scheme-mode-hook #'display-fill-column-indicator-mode)

This creates a vertical line that reminds you that your code should fit
inside 80 columns.

Possible also mention how to set up page break lines:

https://github.com/purcell/page-break-lines