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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 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 system)
#:use-module (guix ui)
#:use-module (guix store)
#:use-module (guix derivations)
#:use-module (guix packages)
#:use-module (guix utils)
#:use-module (guix monads)
#:use-module (guix scripts build)
#:use-module (gnu system vm)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-37)
#:use-module (ice-9 match)
#:export (guix-system
read-operating-system))
(define %user-module
;; Module in which the machine description file is loaded.
(let ((module (make-fresh-user-module)))
(for-each (lambda (iface)
(module-use! module (resolve-interface iface)))
'((gnu system)
(gnu services)
(gnu system shadow)))
module))
(define (read-operating-system file)
"Read the operating-system declaration from FILE and return it."
;; TODO: Factorize.
(catch #t
(lambda ()
;; Avoid ABI incompatibility with the <operating-system> record.
(set! %fresh-auto-compile #t)
(save-module-excursion
(lambda ()
(set-current-module %user-module)
(primitive-load file))))
(lambda args
(match args
(('system-error . _)
(let ((err (system-error-errno args)))
(leave (_ "failed to open operating system file '~a': ~a~%")
file (strerror err))))
(_
(leave (_ "failed to load machine file '~a': ~s~%")
file args))))))
;;;
;;; Options.
;;;
(define (show-help)
(display (_ "Usage: guix system [OPTION] ACTION FILE
Build the operating system declared in FILE according to ACTION.\n"))
(display (_ "Currently the only valid values for ACTION are 'vm', which builds
a virtual machine of the given operating system that shares the host's store,
and 'vm-image', which builds a virtual machine image that stands alone.\n"))
(show-build-options-help)
(display (_ "
--image-size=SIZE for 'vm-image', produce an image of SIZE"))
(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.
(cons* (option '(#\h "help") #f #f
(lambda args
(show-help)
(exit 0)))
(option '(#\V "version") #f #f
(lambda args
(show-version-and-exit "guix system")))
(option '("image-size") #t #f
(lambda (opt name arg result)
(alist-cons 'image-size (size->number arg)
result)))
(option '(#\n "dry-run") #f #f
(lambda (opt name arg result)
(alist-cons 'dry-run? #t result)))
%standard-build-options))
(define %default-options
;; Alist of default option values.
`((system . ,(%current-system))
(substitutes? . #t)
(build-hook? . #t)
(max-silent-time . 3600)
(verbosity . 0)
(image-size . ,(* 900 (expt 2 20)))))
;;;
;;; Entry point.
;;;
(define (guix-system . 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)
(if (assoc-ref result 'action)
(let ((previous (assoc-ref result 'argument)))
(if previous
(leave (_ "~a: extraneous argument~%") previous)
(alist-cons 'argument arg result)))
(let ((action (string->symbol arg)))
(case action
((vm)
(alist-cons 'action action result))
((vm-image)
(alist-cons 'action action result))
(else (leave (_ "~a: unknown action~%")
action))))))
%default-options))
(with-error-handling
(let* ((opts (parse-options))
(file (assoc-ref opts 'argument))
(action (assoc-ref opts 'action))
(os (if file
(read-operating-system file)
(leave (_ "no configuration file specified~%"))))
(mdrv (case action
((vm-image)
(let ((size (assoc-ref opts 'image-size)))
(system-qemu-image os
#:disk-image-size size)))
((vm)
(system-qemu-image/shared-store-script os))))
(store (open-connection))
(dry? (assoc-ref opts 'dry-run?))
(drv (run-with-store store mdrv)))
(set-build-options-from-command-line store opts)
(show-what-to-build store (list drv)
#:dry-run? dry?
#:use-substitutes? (assoc-ref opts 'substitutes?))
(unless dry?
(build-derivations store (list drv))
(display (derivation->output-path drv))
(newline)))))
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