Mirror of GNU Guix
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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix search-paths)
#:use-module (guix records)
#:use-module (ice-9 match)
#:export (<search-path-specification>
search-path-specification
search-path-specification?
search-path-specification-variable
search-path-specification-files
search-path-specification-separator
search-path-specification-file-type
search-path-specification-file-pattern
search-path-specification->sexp
sexp->search-path-specification))
;;; Commentary:
;;;
;;; This module defines "search path specifications", which allow packages to
;;; declare environment variables that they use to define search paths. For
;;; instance, GCC has the 'CPATH' variable, Guile has the 'GUILE_LOAD_PATH'
;;; variable, etc.
;;;
;;; Code:
;; The specification of a search path.
(define-record-type* <search-path-specification>
search-path-specification make-search-path-specification
search-path-specification?
(variable search-path-specification-variable) ;string
(files search-path-specification-files) ;list of strings
(separator search-path-specification-separator ;string
(default ":"))
(file-type search-path-specification-file-type ;symbol
(default 'directory))
(file-pattern search-path-specification-file-pattern ;#f | string
(default #f)))
(define (search-path-specification->sexp spec)
"Return an sexp representing SPEC, a <search-path-specification>. The sexp
corresponds to the arguments expected by `set-path-environment-variable'."
;; Note that this sexp format is used both by build systems and in
;; (guix profiles), so think twice before you change it.
(match spec
(($ <search-path-specification> variable files separator type pattern)
`(,variable ,files ,separator ,type ,pattern))))
(define (sexp->search-path-specification sexp)
"Convert SEXP, which is as returned by 'search-path-specification->sexp', to
a <search-path-specification> object."
(match sexp
((variable files separator type pattern)
(search-path-specification
(variable variable)
(files files)
(separator separator)
(file-type type)
(file-pattern pattern)))))
;;; search-paths.scm ends here