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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 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 bzr-download)
#:use-module (guix gexp)
#:use-module (guix modules) ;for 'source-module-closure'
#:use-module (guix monads)
#:use-module (guix packages)
#:use-module (guix records)
#:use-module (guix store)
#:export (bzr-reference
bzr-reference?
bzr-reference-url
bzr-reference-revision
bzr-fetch))
;;; Commentary:
;;;
;;; An <origin> method that fetches a specific revision from a Bazaar
;;; repository. The repository URL and revision identifier are specified with
;;; a <bzr-reference> object.
;;;
;;; Code:
(define-record-type* <bzr-reference>
bzr-reference make-bzr-reference
bzr-reference?
(url bzr-reference-url)
(revision bzr-reference-revision))
(define (bzr-package)
"Return the default Bazaar package."
(let ((distro (resolve-interface '(gnu packages version-control))))
(module-ref distro 'bazaar)))
(define* (bzr-fetch ref hash-algo hash
#:optional name
#:key (system (%current-system)) (guile (default-guile))
(bzr (bzr-package)))
"Return a fixed-output derivation that fetches REF, a <bzr-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 build
(with-imported-modules (source-module-closure
'((guix build bzr)))
#~(begin
(use-modules (guix build bzr))
(bzr-fetch
(getenv "bzr url") (getenv "bzr reference") #$output
#:bzr-command (string-append #+bzr "/bin/bzr")))))
(mlet %store-monad ((guile (package->derivation guile system)))
(gexp->derivation (or name "bzr-branch") build
;; Use environment variables and a fixed script name so
;; there's only one script in store for all the
;; downloads.
#:script-name "bzr-download"
#:env-vars
`(("bzr url" . ,(bzr-reference-url ref))
("bzr reference" . ,(bzr-reference-revision ref)))
#:system system
#:local-build? #t ;don't offload repo branching
#:hash-algo hash-algo
#:hash hash
#:recursive? #t
#:guile-for-build guile)))
;;; bzr-download.scm ends here
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