mirror of
https://github.com/NixOS/nixpkgs.git
synced 2024-11-30 01:20:40 +00:00
53 lines
2.6 KiB
Nix
53 lines
2.6 KiB
Nix
# Functions to build elisp files to locally configure emcas buffers.
|
|
# See https://github.com/shlevy/nix-buffer
|
|
|
|
{ lib, writeText, inherit-local }:
|
|
|
|
{
|
|
withPackages = pkgs: let
|
|
extras = map (x: x.emacsBufferSetup pkgs) (builtins.filter (builtins.hasAttr "emacsBufferSetup") pkgs);
|
|
in writeText "dir-locals.el" ''
|
|
(require 'inherit-local "${inherit-local}/share/emacs/site-lisp/elpa/inherit-local-${inherit-local.version}/inherit-local.elc")
|
|
|
|
; Only set up nixpkgs buffer handling when we have some buffers active
|
|
(defvar nixpkgs--buffer-count 0)
|
|
(when (eq nixpkgs--buffer-count 0)
|
|
(make-variable-buffer-local 'nixpkgs--is-nixpkgs-buffer)
|
|
; When generating a new temporary buffer (one whose name starts with a space), do inherit-local inheritance and make it a nixpkgs buffer
|
|
(defun nixpkgs--around-generate (orig name)
|
|
(if (and nixpkgs--is-nixpkgs-buffer (eq (aref name 0) ?\s))
|
|
(let ((buf (funcall orig name)))
|
|
(progn
|
|
(inherit-local-inherit-child buf)
|
|
(with-current-buffer buf
|
|
(setq nixpkgs--buffer-count (1+ nixpkgs--buffer-count))
|
|
(add-hook 'kill-buffer-hook 'nixpkgs--decrement-buffer-count nil t)))
|
|
buf)
|
|
(funcall orig name)))
|
|
(advice-add 'generate-new-buffer :around #'nixpkgs--around-generate)
|
|
; When we have no more nixpkgs buffers, tear down the buffer handling
|
|
(defun nixpkgs--decrement-buffer-count ()
|
|
(setq nixpkgs--buffer-count (1- nixpkgs--buffer-count))
|
|
(when (eq nixpkgs--buffer-count 0)
|
|
(advice-remove 'generate-new-buffer #'nixpkgs--around-generate)
|
|
(fmakunbound 'nixpkgs--around-generate)
|
|
(fmakunbound 'nixpkgs--decrement-buffer-count))))
|
|
(setq nixpkgs--buffer-count (1+ nixpkgs--buffer-count))
|
|
(add-hook 'kill-buffer-hook 'nixpkgs--decrement-buffer-count nil t)
|
|
|
|
; Add packages to PATH and exec-path
|
|
(make-local-variable 'process-environment)
|
|
(put 'process-environment 'permanent-local t)
|
|
(inherit-local 'process-environment)
|
|
; setenv modifies in place, so copy the environment first
|
|
(setq process-environment (copy-tree process-environment))
|
|
(setenv "PATH" (concat "${lib.makeSearchPath "bin" pkgs}:" (getenv "PATH")))
|
|
(inherit-local-permanent exec-path (append '(${builtins.concatStringsSep " " (map (p: "\"${p}/bin\"") pkgs)}) exec-path))
|
|
|
|
(setq nixpkgs--is-nixpkgs-buffer t)
|
|
(inherit-local 'nixpkgs--is-nixpkgs-buffer)
|
|
|
|
${lib.concatStringsSep "\n" extras}
|
|
'';
|
|
}
|