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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2014 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2014 Sree Harsha Totakura <sreeharsha@totakura.in>
+;;;
+;;; 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 svn-download)
+ #:use-module (guix records)
+ #:use-module (guix derivations)
+ #:use-module (guix packages)
+ #:use-module (ice-9 match)
+ #:export (svn-reference
+ svn-reference?
+ svn-reference-url
+ svn-reference-revision
+ svn-fetch))
+
+;;; Commentary:
+;;;
+;;; An <origin> method that fetches a specific revision from a Subversion
+;;; repository. The repository URL and REVISION are specified with a
+;;; <svn-reference> object. REVISION should be specified as a number.
+;;;
+;;; Code:
+
+(define-record-type* <svn-reference>
+ svn-reference make-svn-reference
+ svn-reference?
+ (url svn-reference-url) ; string
+ (revision svn-reference-revision)) ; number
+
+(define* (svn-fetch store ref hash-algo hash
+ #:optional name
+ #:key (system (%current-system)) guile svn)
+ "Return a fixed-output derivation in STORE that fetches REF, a
+<svn-reference> object. The output is expected to have recursive hash HASH of
+type HASH-ALGO (a symbol). Use NAME as the file name, or a generic name if
+#f."
+ (define guile-for-build
+ (match guile
+ ((? package?)
+ (package-derivation store guile system))
+ (#f ; the default
+ (let* ((distro (resolve-interface '(gnu packages base)))
+ (guile (module-ref distro 'guile-final)))
+ (package-derivation store guile system)))))
+
+ (define svn-for-build
+ (match svn
+ ((? package?)
+ (package-derivation store svn system))
+ (#f ; the default
+ (let* ((distro (resolve-interface '(gnu packages version-control)))
+ (svn (module-ref distro 'subversion)))
+ (package-derivation store svn system)))))
+
+ (let* ((command (string-append (derivation->output-path svn-for-build)
+ "/bin/svn"))
+ (builder `(begin
+ (use-modules (guix build svn))
+ (svn-fetch ',(svn-reference-url ref)
+ ',(svn-reference-revision ref)
+ %output
+ #:svn-command ',command))))
+ (build-expression->derivation store (or name "svn-checkout") builder
+ #:system system
+ #:local-build? #t
+ #:inputs `(("svn" ,svn-for-build))
+ #:hash-algo hash-algo
+ #:hash hash
+ #:recursive? #t
+ #:modules '((guix build svn)
+ (guix build utils))
+ #:guile-for-build guile-for-build
+ #:local-build? #t)))
+
+;;; svn-download.scm ends here