1543c8cc01
`site-start.el` is the file loaded on startup, containing nix-specific customizations like adding paths in `NIX_PROFILES` to the emacs-specific search-path (`load-path`) or making man-pages in these directories discoverable.
46 lines
1.8 KiB
EmacsLisp
46 lines
1.8 KiB
EmacsLisp
(defun nix--profile-paths ()
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"Returns a list of all paths in the NIX_PROFILES environment
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variable, 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
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;;; all folders in `NIX_PROFILES'
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(setq load-path
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(append (mapcar (lambda (x) (concat x "/share/emacs/site-lisp/"))
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(nix--profile-paths))
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load-path))
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;;; Make `woman' find the man pages
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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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(eval-after-load 'tramp
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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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(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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(concat
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(number-to-string emacs-major-version)
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"."
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(number-to-string emacs-minor-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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