a131be8f99
Previous behavior only added <nix_profile>/share/emacs/site-lisp/ and one level of subdirectories, whereas this commit adds all subdirectories recursively using normal-top-level-add-subdirs-to-load-path. This matches the behavior of Emacs on non-Nix distros, which include a /usr/share/emacs/site-lisp/subdirs.el file with identical recursive behavior. See also: https://www.emacswiki.org/emacs/LoadPath
80 lines
3.5 KiB
EmacsLisp
80 lines
3.5 KiB
EmacsLisp
;; -*- lexical-binding: t; -*-
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(defun nix--profile-paths ()
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"Return a list of all paths in NIX_PROFILES.
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The list is ordered from more-specific (the user profile) to the
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least specific (the system profile)"
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(reverse (split-string (or (getenv "NIX_PROFILES") ""))))
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;;; Extend `load-path' to search for elisp files in subdirectories of all folders in `NIX_PROFILES'.
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;;; Non-Nix distros have similar logic in /usr/share/emacs/site-lisp/subdirs.el.
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;;; See https://www.gnu.org/software/emacs/manual/html_node/elisp/Library-Search.html
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(dolist (profile (nix--profile-paths))
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(let ((default-directory (expand-file-name "share/emacs/site-lisp/" profile)))
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(when (file-exists-p default-directory)
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(setq load-path (cons default-directory load-path))
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(normal-top-level-add-subdirs-to-load-path))))
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;;; Remove wrapper site-lisp from EMACSLOADPATH so it's not propagated
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;;; to any other Emacsen that might be started as subprocesses.
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(let ((wrapper-site-lisp (getenv "emacsWithPackages_siteLisp"))
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(env-load-path (getenv "EMACSLOADPATH")))
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(when wrapper-site-lisp
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(setenv "emacsWithPackages_siteLisp" nil))
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(when (and wrapper-site-lisp env-load-path)
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(let* ((env-list (split-string env-load-path ":"))
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(new-env-list (delete wrapper-site-lisp env-list)))
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(setenv "EMACSLOADPATH" (when new-env-list
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(mapconcat 'identity new-env-list ":"))))))
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(let ((wrapper-site-lisp (getenv "emacsWithPackages_siteLispNative"))
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(env-load-path (getenv "EMACSNATIVELOADPATH")))
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(when wrapper-site-lisp
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(setenv "emacsWithPackages_siteLispNative" nil))
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(when (and wrapper-site-lisp env-load-path)
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(let* ((env-list (split-string env-load-path ":"))
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(new-env-list (delete wrapper-site-lisp env-list)))
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(setenv "EMACSNATIVELOADPATH" (when new-env-list
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(mapconcat 'identity new-env-list ":"))))))
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;;; Set up native-comp load path.
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(when (featurep 'comp)
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;; Append native-comp subdirectories from `NIX_PROFILES'.
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(setq native-comp-eln-load-path
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(append (mapcar (lambda (profile-dir)
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(concat profile-dir "/share/emacs/native-lisp/"))
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(nix--profile-paths))
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native-comp-eln-load-path)))
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;;; Make `woman' find the man pages
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(defvar woman-manpath)
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(eval-after-load 'woman
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'(setq woman-manpath
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(append (mapcar (lambda (x) (concat x "/share/man/"))
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(nix--profile-paths))
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woman-manpath)))
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;;; Make tramp work for remote NixOS machines
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(defvar tramp-remote-path)
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(eval-after-load 'tramp-sh
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;; TODO: We should also add the other `NIX_PROFILES' to this path.
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;; However, these are user-specific, so we would need to discover
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;; them dynamically after connecting via `tramp'
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'(add-to-list 'tramp-remote-path "/run/current-system/sw/bin"))
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;;; C source directory
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;;;
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;;; Computes the location of the C source directory from the path of
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;;; the current file:
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;;; from: /nix/store/<hash>-emacs-<version>/share/emacs/site-lisp/site-start.el
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;;; to: /nix/store/<hash>-emacs-<version>/share/emacs/<version>/src/
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(defvar find-function-C-source-directory)
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(let ((emacs
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(file-name-directory ; .../emacs/
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(directory-file-name ; .../emacs/site-lisp
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(file-name-directory load-file-name)))) ; .../emacs/site-lisp/
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(version
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(file-name-as-directory
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emacs-version))
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(src (file-name-as-directory "src")))
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(setq find-function-C-source-directory (concat emacs version src)))
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