245 lines
9.2 KiB
Scheme
245 lines
9.2 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014, 2015 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix scripts pull)
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#:use-module (guix ui)
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#:use-module (guix scripts)
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#:use-module (guix store)
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#:use-module (guix config)
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#:use-module (guix packages)
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#:use-module (guix derivations)
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#:use-module (guix download)
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#:use-module (guix gexp)
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#:use-module (guix monads)
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#:use-module ((guix build utils)
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#:select (with-directory-excursion delete-file-recursively))
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#:use-module (gnu packages base)
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#:use-module (gnu packages guile)
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#:use-module ((gnu packages bootstrap)
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#:select (%bootstrap-guile))
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#:use-module (gnu packages compression)
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#:use-module (gnu packages gnupg)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-37)
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#:use-module (ice-9 ftw)
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#:use-module (ice-9 match)
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#:export (guix-pull))
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(define %snapshot-url
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;; "http://hydra.gnu.org/job/guix/master/tarball/latest/download"
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"http://git.savannah.gnu.org/cgit/guix.git/snapshot/master.tar.gz"
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)
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(define-syntax-rule (with-environment-variable variable value body ...)
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(let ((original (getenv variable)))
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(dynamic-wind
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(lambda ()
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(setenv variable value))
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(lambda ()
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body ...)
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(lambda ()
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(setenv variable original)))))
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(define-syntax-rule (with-PATH value body ...)
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(with-environment-variable "PATH" value body ...))
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;;;
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;;; Command-line options.
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;;;
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(define %default-options
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;; Alist of default option values.
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`((tarball-url . ,%snapshot-url)))
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(define (show-help)
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(display (_ "Usage: guix pull [OPTION]...
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Download and deploy the latest version of Guix.\n"))
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(display (_ "
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--verbose produce verbose output"))
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(display (_ "
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--url=URL download the Guix tarball from URL"))
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(display (_ "
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--bootstrap use the bootstrap Guile to build the new Guix"))
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(newline)
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(display (_ "
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-h, --help display this help and exit"))
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(display (_ "
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-V, --version display version information and exit"))
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(newline)
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(show-bug-report-information))
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(define %options
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;; Specifications of the command-line options.
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(list (option '("verbose") #f #f
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(lambda (opt name arg result)
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(alist-cons 'verbose? #t result)))
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(option '("url") #t #f
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(lambda (opt name arg result)
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(alist-cons 'tarball-url arg
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(alist-delete 'tarball-url result))))
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(option '("bootstrap") #f #f
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(lambda (opt name arg result)
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(alist-cons 'bootstrap? #t result)))
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(option '(#\h "help") #f #f
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(lambda args
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(show-help)
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(exit 0)))
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(option '(#\V "version") #f #f
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(lambda args
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(show-version-and-exit "guix pull")))))
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(define what-to-build
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(store-lift show-what-to-build))
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(define indirect-root-added
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(store-lift add-indirect-root))
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(define (temporary-directory)
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"Make a temporary directory and return its name."
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(let ((name (tmpnam)))
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(mkdir name)
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(chmod name #o700)
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name))
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(define (first-directory directory)
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"Return a the name of the first file found under DIRECTORY."
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(match (scandir directory
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(lambda (name)
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(and (not (member name '("." "..")))
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(file-is-directory? name))))
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((directory)
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directory)
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(x
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(raise (condition
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(&message
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(message "tarball did not produce a single source directory")))))))
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(define (interned-then-deleted directory name)
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"Add DIRECTORY to the store under NAME, and delete it. Return the resulting
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store file name."
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(mlet %store-monad ((result (interned-file directory name
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#:recursive? #t)))
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(delete-file-recursively directory)
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(return result)))
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(define (unpack tarball)
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"Return the name of the directory where TARBALL has been unpacked."
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(mlet* %store-monad ((format -> (lift format %store-monad))
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(tar (package->derivation tar))
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(gzip (package->derivation gzip)))
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(mbegin %store-monad
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(what-to-build (list tar gzip))
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(built-derivations (list tar gzip))
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(format #t (_ "unpacking '~a'...~%") tarball)
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(let ((source (temporary-directory)))
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(with-directory-excursion source
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(with-PATH (string-append (derivation->output-path gzip) "/bin")
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(unless (zero? (system* (string-append (derivation->output-path tar)
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"/bin/tar")
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"xf" tarball))
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(raise (condition
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(&message (message "failed to unpack source code"))))))
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(interned-then-deleted (string-append source "/"
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(first-directory source))
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"guix-source"))))))
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(define %self-build-file
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;; The file containing code to build Guix. This serves the same purpose as
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;; a makefile, and, similarly, is intended to always keep this name.
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"build-aux/build-self.scm")
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(define* (build-from-source tarball #:key verbose?)
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"Return a derivation to build Guix from TARBALL, using the self-build script
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contained therein."
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;; Running the self-build script makes it easier to update the build
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;; procedure: the self-build script of the Guix-to-be-installed contains the
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;; right dependencies, build procedure, etc., which the Guix-in-use may not
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;; be know.
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(mlet* %store-monad ((source (unpack tarball))
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(script -> (string-append source "/"
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%self-build-file))
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(build -> (primitive-load script)))
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;; BUILD must be a monadic procedure of at least one argument: the source
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;; tree.
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(build source #:verbose? verbose?)))
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(define* (build-and-install tarball config-dir
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#:key verbose?)
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"Build the tool from TARBALL, and install it in CONFIG-DIR."
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(mlet* %store-monad ((source (build-from-source tarball
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#:verbose? verbose?))
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(source-dir -> (derivation->output-path source))
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(to-do? (what-to-build (list source)))
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(built? (built-derivations (list source))))
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;; Always update the 'latest' symlink, regardless of whether SOURCE was
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;; already built or not.
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(if built?
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(mlet* %store-monad
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((latest -> (string-append config-dir "/latest"))
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(done (indirect-root-added latest)))
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(if (and (file-exists? latest)
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(string=? (readlink latest) source-dir))
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(begin
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(display (_ "Guix already up to date\n"))
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(return #t))
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(begin
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(switch-symlinks latest source-dir)
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(format #t
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(_ "updated ~a successfully deployed under `~a'~%")
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%guix-package-name latest)
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(return #t))))
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(leave (_ "failed to update Guix, check the build log~%")))))
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(define (guix-pull . args)
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(define (parse-options)
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;; Return the alist of option values.
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(args-fold* args %options
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(lambda (opt name arg result)
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(leave (_ "~A: unrecognized option~%") name))
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(lambda (arg result)
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(leave (_ "~A: unexpected argument~%") arg))
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%default-options))
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(with-error-handling
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(let* ((opts (parse-options))
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(store (open-connection))
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(url (assoc-ref opts 'tarball-url)))
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(let ((tarball (download-to-store store url "guix-latest.tar.gz")))
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(unless tarball
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(leave (_ "failed to download up-to-date source, exiting\n")))
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(parameterize ((%guile-for-build
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(package-derivation store
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(if (assoc-ref opts 'bootstrap?)
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%bootstrap-guile
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(canonical-package guile-2.0)))))
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(run-with-store store
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(build-and-install tarball (config-directory)
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#:verbose? (assoc-ref opts 'verbose?))))))))
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;; Local Variables:
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;; eval: (put 'with-PATH 'scheme-indent-function 1)
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;; eval: (put 'with-temporary-directory 'scheme-indent-function 1)
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;; End:
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;;; pull.scm ends here
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