;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 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 build download)
#:use-module (gnu packages base)
#: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-11)
#: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 (download-and-store store)
"Download the latest Guix tarball, add it to STORE, and return its store
path."
;; FIXME: Authenticate the downloaded file!
;; FIXME: Optimize data transfers using rsync, Git, bsdiff, or GNUnet's DHT.
(call-with-temporary-output-file
(lambda (temp port)
(let ((result
(parameterize ((current-output-port (current-error-port)))
(url-fetch %snapshot-url temp))))
(close port)
(and result
(add-to-store store "guix-latest.tar.gz" #f "sha256" temp))))))
(define (unpack store tarball)
"Return a derivation that unpacks TARBALL into STORE and compiles Scheme
files."
(define builder
`(begin
(use-modules (guix build utils)
(system base compile)
(ice-9 ftw)
(ice-9 match))
(let ((out (assoc-ref %outputs "out"))
(tar (assoc-ref %build-inputs "tar"))
(gzip (assoc-ref %build-inputs "gzip"))
(gcrypt (assoc-ref %build-inputs "gcrypt"))
(tarball (assoc-ref %build-inputs "tarball")))
(setenv "PATH" (string-append tar "/bin:" gzip "/bin"))
(system* "tar" "xvf" tarball)
(match (scandir "." (lambda (name)
(and (not (member name '("." "..")))
(file-is-directory? name))))
((dir)
(chdir dir))
(x
(error "tarball did not produce a single source directory" x)))
(format #t "copying and compiling Guix to `~a'...~%" out)
;; Copy everything under guix/ and gnu/ plus guix.scm.
(file-system-fold (lambda (dir stat result) ; enter?
(or (string-prefix? "./guix" dir)
(string-prefix? "./gnu" dir)
(string=? "." dir)))
(lambda (file stat result) ; leaf
(when (or (not (string=? (dirname file) "."))
(string=? (basename file) "guix.scm"))
(let ((target (string-drop file 1)))
(copy-file file
(string-append out target)))))
(lambda (dir stat result) ; down
(mkdir (string-append out
(string-drop dir 1))))
(const #t) ; up
(const #t) ; skip
(lambda (file stat errno result)
(error "cannot access file"
file (strerror errno)))
#f
"."
lstat)
;; Add a fake (guix config) module to allow the other modules to be
;; compiled. The user's (guix config) is the one that will be used.
(copy-file "guix/config.scm.in"
(string-append out "/guix/config.scm"))
(substitute* (string-append out "/guix/config.scm")
(("@LIBGCRYPT@")
(string-append gcrypt "/lib/libgcrypt")))
;; Augment the search path so Scheme code can be compiled.
(set! %load-path (cons out %load-path))
(set! %load-compiled-path (cons out %load-compiled-path))
;; Compile the .scm files.
(for-each (lambda (file)
(when (string-suffix? ".scm" file)
(let ((go (string-append (string-drop-right file 4)
".go")))
(compile-file file
#:output-file go
#:opts %auto-compilation-options))))
;; XXX: Because of the autoload hack in (guix build
;; download), we must build it first to avoid errors since
;; (gnutls) is unavailable.
(cons (string-append out "/guix/build/download.scm")
(find-files out "\\.scm")))
;; Remove the "fake" (guix config).
(delete-file (string-append out "/guix/config.scm"))
(delete-file (string-append out "/guix/config.go")))))
(build-expression->derivation store "guix-latest" (%current-system)
builder
`(("tar" ,(package-derivation store tar))
("gzip" ,(package-derivation store gzip))
("gcrypt" ,(package-derivation store
libgcrypt))
("tarball" ,tarball))
#:modules '((guix build utils))))
;;;
;;; Command-line options.
;;;
(define %default-options
;; Alist of default option values.
'())
(define (show-help)
(display (_ "Usage: guix pull [OPTION]...
Download and deploy the latest version of Guix.\n"))
(display (_ "
--verbose produce verbose output"))
(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 '("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 (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)))
(let ((tarball (download-and-store store)))
(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
guile-final)))
(current-build-output-port
(if (assoc-ref opts 'verbose?)
(current-error-port)
(%make-void-port "w"))))
(let*-values (((config-dir)
(config-directory))
((source drv)
(unpack store tarball))
((source-dir)
(derivation-output-path
(assoc-ref (derivation-outputs drv) "out"))))
(if (show-what-to-build store (list source))
(if (build-derivations store (list source))
(let ((latest (string-append config-dir "/latest")))
(add-indirect-root store latest)
(switch-symlinks latest source-dir)
(format #t
(_ "updated ~a successfully deployed under `~a'~%")
%guix-package-name latest)
#t)
(leave (_ "failed to update Guix, check the build log~%")))
(begin
(display (_ "Guix already up to date\n"))
#t))))))))