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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2015 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@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 cvs)
#:use-module (guix build utils)
#:use-module (ice-9 regex)
#:use-module (ice-9 ftw)
#:export (cvs-fetch))
;;; Commentary:
;;;
;;; This is the build-side support code of (guix cvs-download). It allows a
;;; CVS repository to be checked out at a specific revision or date.
;;;
;;; Code:
(define (find-cvs-directories)
(define (enter? path st result)
(not (string-suffix? "/CVS" path)))
(define (leaf path st result) result)
(define (down path st result) result)
(define (up path st result) result)
(define (skip path st result)
(if (and (string-suffix? "/CVS" path)
(eqv? 'directory (stat:type st)))
(cons path result)
result))
(define (error path st errno result)
(format (current-error-port) "cvs-fetch: ~a: ~a~%"
path (strerror errno)))
(sort (file-system-fold enter? leaf down up skip error '() "." lstat)
string<?))
(define* (cvs-fetch cvs-root-directory module revision directory
#:key (cvs-command "cvs"))
"Fetch REVISION from MODULE of CVS-ROOT-DIRECTORY into DIRECTORY. REVISION
must either be a date in ISO-8601 format (e.g. \"2012-12-21\") or a CVS tag.
Return #t on success, #f otherwise."
;; Use "-z0" because enabling compression leads to hangs during checkout on
;; certain repositories, such as
;; ":pserver:anonymous@cvs.savannah.gnu.org:/sources/gnustandards".
(and (zero? (system* cvs-command "-z0"
"-d" cvs-root-directory
"checkout"
(if (string-match "^[0-9]{4}-[0-9]{2}-[0-9]{2}$" revision)
"-D" "-r")
revision
module))
;; Copy rather than rename in case MODULE and DIRECTORY are on
;; different devices.
(copy-recursively module directory)
(with-directory-excursion directory
(for-each delete-file-recursively (find-cvs-directories)))
#t))
;;; cvs.scm ends here
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