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gnu: emacs-minimal: Add output containing C source files.

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* gnu/packages/emacs.scm (emacs-minimal)[outputs]: Add “doc”.
[arguments]<#:phases>: Add phase ‘install-c-source’.
{install-site-start}: Attempt to load guix-emacs-c-source.el in site-start.el.

Fixes: guix/guix#1540 (Cannot follow references to C functions).

Change-Id: I6d9478443b081b436b5b86b208135f69f35671bd
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>
This commit is contained in:
Jake Forster 2025-08-24 03:00:16 +09:30 • committed by Liliana Marie Prikler
parent 6ad8e56bec
commit b30dc52b92
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1 changed files with 21 additions and 1 deletions
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22
gnu/packages/emacs.scm
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@ -26,6 +26,7 @@
;;; Copyright © 2023 Declan Tsien <declantsien@riseup.net>
;;; Copyright © 2023, 2024 Zheng Junjie <873216071@qq.com>
;;; Copyright © 2025 Nicolas Graves <ngraves@ngraves.fr>
;;; Copyright © 2025 Jake Forster <jakecameron.forster@gmail.com>
;;;
;;; This file is part of GNU Guix.
;;;
@ -192,6 +193,7 @@
"\"~/.guix-home/include\""
"\"/run/current-system/profile/include\"")
" ")))))))
(outputs '("out" "doc"))
(build-system gnu-build-system)
(arguments
(list
@ -311,6 +313,21 @@
(("/bin//sh") (search-input-file inputs "bin/sh")))
(substitute* "test/lisp/eshell/em-script-tests.el"
(("/usr/bin/env") (search-input-file inputs "bin/env"))))))
(add-before 'configure 'install-c-source
(lambda _
(let ((dest (string-append #$output:doc "/share/emacs/c-source"))
(lisp-dir (string-append #$output:doc
"/share/emacs/site-lisp")))
(mkdir-p dest)
(copy-recursively "src" dest)
(mkdir-p lisp-dir)
(with-output-to-file (string-append lisp-dir
"/guix-emacs-c-source.el")
(lambda ()
(display
(string-append
"(setq find-function-C-source-directory \"" dest "\")\n\n"
"(provide 'guix-emacs-c-source)")))))))
(add-after 'install 'install-site-start
;; Use 'guix-emacs' in "site-start.el", which is used autoload the
;; Elisp packages found in EMACSLOADPATH.
@ -338,7 +355,10 @@
"(when (require 'guix-emacs nil t)\n"
" (guix-emacs-autoload-packages 'no-reload)\n"
" (advice-add 'package-load-all-descriptors"
" :after #'guix-emacs-load-package-descriptors))"))))
" :after #'guix-emacs-load-package-descriptors))\n\n"
";; The file guix-emacs-c-source.el is available from the"
" 'doc' output.\n"
"(require 'guix-emacs-c-source nil t)"))))
;; Remove the extraneous subdirs.el file, as it causes Emacs to
;; add recursively all the the sub-directories of a profile's
;; share/emacs/site-lisp union when added to EMACSLOADPATH,