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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014, 2015 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 utils)
#:use-module (guix scripts)
#: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 ((guix build utils)
#:select (with-directory-excursion delete-file-recursively))
#: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-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-37)
#:use-module (ice-9 ftw)
#:use-module (ice-9 match)
#: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/master.tar.gz"
)
(define-syntax-rule (with-environment-variable variable value body ...)
(let ((original (getenv variable)))
(dynamic-wind
(lambda ()
(setenv variable value))
(lambda ()
body ...)
(lambda ()
(setenv variable original)))))
(define-syntax-rule (with-PATH value body ...)
(with-environment-variable "PATH" value body ...))
;;;
;;; 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 (temporary-directory)
"Make a temporary directory and return its name."
(let ((name (tmpnam)))
(mkdir name)
(chmod name #o700)
name))
(define (first-directory directory)
"Return a the name of the first file found under DIRECTORY."
(match (scandir directory
(lambda (name)
(and (not (member name '("." "..")))
(file-is-directory? name))))
((directory)
directory)
(x
(raise (condition
(&message
(message "tarball did not produce a single source directory")))))))
(define (interned-then-deleted directory name)
"Add DIRECTORY to the store under NAME, and delete it. Return the resulting
store file name."
(mlet %store-monad ((result (interned-file directory name
#:recursive? #t)))
(delete-file-recursively directory)
(return result)))
(define (unpack tarball)
"Return the name of the directory where TARBALL has been unpacked."
(mlet* %store-monad ((format -> (lift format %store-monad))
(tar (package->derivation tar))
(gzip (package->derivation gzip)))
(mbegin %store-monad
(what-to-build (list tar gzip))
(built-derivations (list tar gzip))
(format #t (_ "unpacking '~a'...~%") tarball)
(let ((source (temporary-directory)))
(with-directory-excursion source
(with-PATH (string-append (derivation->output-path gzip) "/bin")
(unless (zero? (system* (string-append (derivation->output-path tar)
"/bin/tar")
"xf" tarball))
(raise (condition
(&message (message "failed to unpack source code"))))))
(interned-then-deleted (string-append source "/"
(first-directory source))
"guix-source"))))))
(define %self-build-file
;; The file containing code to build Guix. This serves the same purpose as
;; a makefile, and, similarly, is intended to always keep this name.
"build-aux/build-self.scm")
(define* (build-from-source tarball #:key verbose?)
"Return a derivation to build Guix from TARBALL, using the self-build script
contained therein."
;; Running the self-build script makes it easier to update the build
;; procedure: the self-build script of the Guix-to-be-installed contains the
;; right dependencies, build procedure, etc., which the Guix-in-use may not
;; be know.
(mlet* %store-monad ((source (unpack tarball))
(script -> (string-append source "/"
%self-build-file))
(build -> (primitive-load script)))
;; BUILD must be a monadic procedure of at least one argument: the source
;; tree.
(build source #:verbose? verbose?)))
(define* (build-and-install tarball config-dir
#:key verbose?)
"Build the tool from TARBALL, and install it in CONFIG-DIR."
(mlet* %store-monad ((source (build-from-source tarball
#:verbose? verbose?))
(source-dir -> (derivation->output-path source))
(to-do? (what-to-build (list source)))
(built? (built-derivations (list source))))
;; Always update the 'latest' symlink, regardless of whether SOURCE was
;; already built or not.
(if built?
(mlet* %store-monad
((latest -> (string-append config-dir "/latest"))
(done (indirect-root-added latest)))
(if (and (file-exists? latest)
(string=? (readlink latest) source-dir))
(begin
(display (_ "Guix already up to date\n"))
(return #t))
(begin
(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~%")))))
(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?))))))))
;; Local Variables:
;; eval: (put 'with-PATH 'scheme-indent-function 1)
;; eval: (put 'with-temporary-directory 'scheme-indent-function 1)
;; End:
;;; pull.scm ends here
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