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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2014, 2015 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; 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 hg-download)
#:use-module (guix gexp)
#:use-module (guix store)
#:use-module (guix monads)
#:use-module (guix records)
#:use-module (guix packages)
#:autoload (guix build-system gnu) (standard-packages)
#:use-module (ice-9 match)
#:export (hg-reference
hg-reference?
hg-reference-url
hg-reference-changeset
hg-reference-recursive?
hg-fetch))
;;; Commentary:
;;;
;;; An <origin> method that fetches a specific changeset from a Mercurial
;;; repository. The repository URL and changeset ID are specified with a
;;; <hg-reference> object.
;;;
;;; Code:
(define-record-type* <hg-reference>
hg-reference make-hg-reference
hg-reference?
(url hg-reference-url)
(changeset hg-reference-changeset))
(define (hg-package)
"Return the default Mercurial package."
(let ((distro (resolve-interface '(gnu packages version-control))))
(module-ref distro 'mercurial)))
(define* (hg-fetch ref hash-algo hash
#:optional name
#:key (system (%current-system)) (guile (default-guile))
(hg (hg-package)))
"Return a fixed-output derivation that fetches REF, a <hg-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
#~(begin
(use-modules (guix build hg)
(guix build utils)
(ice-9 match))
(hg-fetch '#$(hg-reference-url ref)
'#$(hg-reference-changeset ref)
#$output
#:hg-command (string-append #+hg "/bin/hg"))))
(mlet %store-monad ((guile (package->derivation guile system)))
(gexp->derivation (or name "hg-checkout") build
#:system system
#:local-build? #t ;don't offload repo cloning
#:hash-algo hash-algo
#:hash hash
#:recursive? #t
#:modules '((guix build hg)
(guix build utils))
#:guile-for-build guile)))
;;; hg-download.scm ends here
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