Add (guix svn-download).

* guix/svn-download.scm, guix/build/svn.scm: New files.
* Makefile.am (MODULES): Add them.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/guix/build/svn.scm b/guix/build/svn.scm
new file mode 100644
index 0000000000..74fe084da5
--- /dev/null
+++ b/guix/build/svn.scm
@@ -0,0 +1,49 @@
+;;; 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 build svn)
+  #:use-module (guix build utils)
+  #:export (svn-fetch))
+
+;;; Commentary:
+;;;
+;;; This is the build-side support code of (guix svn-download).  It allows a
+;;; Subversion repository to be cloned and checked out at a specific revision.
+;;;
+;;; Code:
+
+(define* (svn-fetch url revision directory
+                    #:key (svn-command "svn"))
+  "Fetch REVISION from URL into DIRECTORY.  REVISION must be an integer, and a
+valid Subversion revision.  Return #t on success, #f otherwise."
+  (and (zero? (system* svn-command "checkout" "--non-interactive"
+                       ;; Trust the server certificate.  This is OK as we
+                       ;; verify the checksum later.  This can be removed when
+                       ;; ca-certificates package is added.
+                       "--trust-server-cert" "-r" (number->string revision)
+                       url directory))
+       (with-directory-excursion directory
+         (begin
+           ;; The contents of '.svn' vary as a function of the current status
+           ;; of the repo.  Since we want a fixed output, this directory needs
+           ;; to be taken out.
+           (delete-file-recursively ".svn")
+           #t))))
+
+;;; svn.scm ends here