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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; 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 scripts pull)
#:use-module (guix ui)
#:use-module (guix store)
#:use-module (guix config)
#:use-module (guix packages)
#:use-module (guix derivations)
#:use-module (guix download)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module (gnu packages base)
#:use-module (gnu packages guile)
#:use-module ((gnu packages bootstrap)
#:select (%bootstrap-guile))
#:use-module (gnu packages compression)
#:use-module (gnu packages gnupg)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-37)
#:export (guix-pull))
(define %snapshot-url
;; "http://hydra.gnu.org/job/guix/master/tarball/latest/download"
"http://git.savannah.gnu.org/cgit/guix.git/snapshot/guix-master.tar.gz"
)
(define* (unpack tarball #:key verbose?)
"Return a derivation that unpacks TARBALL into STORE and compiles Scheme
files."
(define builder
#~(begin
(use-modules (guix build pull))
(let ((json (string-append #$guile-json "/share/guile/site/2.0")))
(set! %load-path (cons json %load-path))
(set! %load-compiled-path (cons json %load-compiled-path)))
(build-guix #$output #$tarball
;; XXX: This is not perfect, enabling VERBOSE? means
;; building a different derivation.
#:debug-port (if #$verbose?
(current-error-port)
(%make-void-port "w"))
#:tar #$tar
#:gzip #$gzip
#:gcrypt #$libgcrypt)))
(gexp->derivation "guix-latest" builder
#:modules '((guix build pull)
(guix build utils))))
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
`((tarball-url . ,%snapshot-url)))
(define (show-help)
(display (_ "Usage: guix pull [OPTION]...
Download and deploy the latest version of Guix.\n"))
(display (_ "
--verbose produce verbose output"))
(display (_ "
--url=URL download the Guix tarball from URL"))
(display (_ "
--bootstrap use the bootstrap Guile to build the new Guix"))
(newline)
(display (_ "
-h, --help display this help and exit"))
(display (_ "
-V, --version display version information and exit"))
(newline)
(show-bug-report-information))
(define %options
;; Specifications of the command-line options.
(list (option '("verbose") #f #f
(lambda (opt name arg result)
(alist-cons 'verbose? #t result)))
(option '("url") #t #f
(lambda (opt name arg result)
(alist-cons 'tarball-url arg
(alist-delete 'tarball-url result))))
(option '("bootstrap") #f #f
(lambda (opt name arg result)
(alist-cons 'bootstrap? #t result)))
(option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix pull")))))
(define what-to-build
(store-lift show-what-to-build))
(define indirect-root-added
(store-lift add-indirect-root))
(define* (build-and-install tarball config-dir
#:key verbose?)
"Build the tool from TARBALL, and install it in CONFIG-DIR."
(mlet* %store-monad ((source (unpack tarball #:verbose? verbose?))
(source-dir -> (derivation->output-path source))
(to-do? (what-to-build (list source))))
(if to-do?
(mlet* %store-monad ((built? (built-derivations (list source))))
(if built?
(mlet* %store-monad
((latest -> (string-append config-dir "/latest"))
(done (indirect-root-added latest)))
(switch-symlinks latest source-dir)
(format #t
(_ "updated ~a successfully deployed under `~a'~%")
%guix-package-name latest)
(return #t))
(leave (_ "failed to update Guix, check the build log~%"))))
(begin
(display (_ "Guix already up to date\n"))
(return #t)))))
(define (guix-pull . args)
(define (parse-options)
;; Return the alist of option values.
(args-fold* args %options
(lambda (opt name arg result)
(leave (_ "~A: unrecognized option~%") name))
(lambda (arg result)
(leave (_ "~A: unexpected argument~%") arg))
%default-options))
(with-error-handling
(let* ((opts (parse-options))
(store (open-connection))
(url (assoc-ref opts 'tarball-url)))
(let ((tarball (download-to-store store url "guix-latest.tar.gz")))
(unless tarball
(leave (_ "failed to download up-to-date source, exiting\n")))
(parameterize ((%guile-for-build
(package-derivation store
(if (assoc-ref opts 'bootstrap?)
%bootstrap-guile
(canonical-package guile-2.0)))))
(run-with-store store
(build-and-install tarball (config-directory)
#:verbose? (assoc-ref opts 'verbose?))))))))
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