65 lines
2.3 KiB
Scheme
65 lines
2.3 KiB
Scheme
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;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2014 Alex Kost <alezost@gmail.com>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; This is an auxiliary file for the Emacs UI. It is used to add Guix
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;; directories to path variables and to load the main code.
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;;; Code:
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(use-modules (ice-9 regex)
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(srfi srfi-26))
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(define %guix-dir)
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;; The code is taken from ‘guix’ executable script
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(define (set-paths!)
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(define-syntax-rule (push! elt v) (set! v (cons elt v)))
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(define config-lookup
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(let ((config '(("prefix" . "@prefix@")
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("guilemoduledir" . "@guilemoduledir@")))
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(var-ref-regexp (make-regexp "\\$\\{([a-z]+)\\}")))
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(define (expand-var-ref match)
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(lookup (match:substring match 1)))
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(define (expand str)
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(regexp-substitute/global #f var-ref-regexp str
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'pre expand-var-ref 'post))
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(define (lookup name)
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(expand (assoc-ref config name)))
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lookup))
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(let ((module-dir (config-lookup "guilemoduledir"))
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(updates-dir (and=> (or (getenv "XDG_CONFIG_HOME")
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(and=> (getenv "HOME")
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(cut string-append <> "/.config")))
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(cut string-append <> "/guix/latest"))))
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(push! module-dir %load-compiled-path)
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(if (and updates-dir (file-exists? updates-dir))
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(begin
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(set! %guix-dir updates-dir)
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(push! updates-dir %load-path)
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(push! updates-dir %load-compiled-path))
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(set! %guix-dir module-dir))))
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(set-paths!)
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(load-from-path "guix-main")
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