Add (guix bzr-download).

* guix/bzr-download.scm, guix/build/bzr.scm,
etc/snippets/scheme-mode/guix-bzr-reference: New files.
* Makefile.am (MODULES): Add them.
* etc/snippets/scheme-mode/guix-origin: Add "bzr-fetch" to the origin choices.

1 files changed, 44 insertions, 0 deletions

diff --git a/guix/build/bzr.scm b/guix/build/bzr.scm
new file mode 100644
index 0000000000..86ee11391d
--- /dev/null
+++ b/guix/build/bzr.scm
@@ -0,0 +1,44 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Maxim Cournoyer <maxim.cournoyer@gmail.com>
+;;;
+;;; 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 bzr)
+  #:use-module (guix build utils)
+  #:export (bzr-fetch))
+
+;;; Commentary:
+;;;
+;;; This is the build-side support code of (guix bzr-download).  It allows a
+;;; Bazaar repository to be branched at a specific revision.
+;;;
+;;; Code:
+
+(define* (bzr-fetch url revision directory
+                    #:key (bzr-command "bzr"))
+  "Fetch REVISION from URL into DIRECTORY.  REVISION must be a valid Bazaar
+revision identifier.  Return #t on success, else throw an exception."
+  ;; Do not attempt to write .bzr.log to $HOME, which doesn't exist.
+  (setenv "BZR_LOG" "/dev/null")
+  ;; Disable SSL certificate verification; we rely on the hash instead.
+  (invoke bzr-command "-Ossl.cert_reqs=none" "checkout"
+          "--lightweight" "-r" revision url directory)
+  (with-directory-excursion directory
+    (begin
+      (delete-file-recursively ".bzr")
+      #t)))
+
+;;; bzr.scm ends here