;;; GNU Guix --- Functional package management for GNU ;;; Copyright © 2013, 2014 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 build store-copy) #:use-module (guix build utils) #:use-module (srfi srfi-1) #:use-module (ice-9 rdelim) #:export (read-reference-graph populate-store)) ;;; Commentary: ;;; ;;; This module provides the tools to copy store items and their dependencies ;;; to another store. It relies on the availability of "reference graph" ;;; files as produced by 'gexp->derivation' et al. with the ;;; #:references-graphs parameter. ;;; ;;; Code: (define (read-reference-graph port) "Return a list of store paths from the reference graph at PORT. The data at PORT is the format produced by #:references-graphs." (let loop ((line (read-line port)) (result '())) (cond ((eof-object? line) (delete-duplicates result)) ((string-prefix? "/" line) (loop (read-line port) (cons line result))) (else (loop (read-line port) result))))) (define* (populate-store reference-graphs target) "Populate the store under directory TARGET with the items specified in REFERENCE-GRAPHS, a list of reference-graph files." (define store (string-append target (%store-directory))) (define (things-to-copy) ;; Return the list of store files to copy to the image. (define (graph-from-file file) (call-with-input-file file read-reference-graph)) (delete-duplicates (append-map graph-from-file reference-graphs))) (mkdir-p store) (chmod store #o1775) (for-each (lambda (thing) (copy-recursively thing (string-append target thing))) (things-to-copy))) ;;; store-copy.scm ends here