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emacs: Search subdirectories of site-lisp in NIX_PROFILES

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This adds subdirectories of `share/emacs/site-lisp/` in every path in
`NIX_PROFILES` to `load-path` to allow loading of more complex
libraries like `mu4e`.

Fixes #33412
This commit is contained in:
Moritz Ulrich 2018-01-04 11:48:25 +01:00
parent 1543c8cc01
commit 7cfdb2b1b5
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GPG key ID: 45833CACBC407FA7
1 changed files with 16 additions and 5 deletions
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21
pkgs/applications/editors/emacs/site-start.el
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@ -5,11 +5,22 @@ least specific (the system profile)"
(reverse (split-string (or (getenv "NIX_PROFILES") ""))))
;;; Extend `load-path' to search for elisp files in subdirectories of
;;; all folders in `NIX_PROFILES'
(setq load-path
(append (mapcar (lambda (x) (concat x "/share/emacs/site-lisp/"))
(nix--profile-paths))
load-path))
;;; all folders in `NIX_PROFILES'. Also search for one level of
;;; subdirectories in these directories to handle multi-file libraries
;;; like `mu4e'.'
(require 'seq)
(let* ((subdirectory-sites (lambda (site-lisp)
(when (file-exists-p site-lisp)
(seq-filter (lambda (f) (file-directory-p (file-truename f)))
;; Returns all files in `site-lisp', excluding `.' and `..'
(directory-files site-lisp 'full "^\\([^.]\\|\\.[^.]\\|\\.\\..\\)")))))
(paths (apply #'append
(mapcar (lambda (profile-dir)
(let ((site-lisp (concat profile-dir "/share/emacs/site-lisp/")))
(cons site-lisp (funcall subdirectory-sites site-lisp))))
(nix--profile-paths)))))
(setq load-path (append paths load-path)))
;;; Make `woman' find the man pages
(eval-after-load 'woman