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Add 'guix system'. 

* guix/scripts/system.scm: New file.
* Makefile.am (MODULES): Add it.
* po/POTFILES.in: Likewise.
* doc/guix.texi (Using the Configuration System): Link to "Invoking guix
  system".
  (Invoking guix system): New node.
This commit is contained in:
Ludovic Courtès 2014-02-18 23:45:58 +01:00
parent c0e57fb876
commit 523e48969b
4 changed files with 185 additions and 8 deletions
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1
Makefile.am
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@ -77,6 +77,7 @@ MODULES = \
guix/scripts/substitute-binary.scm \
guix/scripts/authenticate.scm \
guix/scripts/refresh.scm \
guix/scripts/system.scm \
guix.scm \
$(GNU_SYSTEM_MODULES)

43
doc/guix.texi
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@ -2547,8 +2547,9 @@ instantiated. Then we show how this mechanism can be extended, for
instance to support new system services.
@menu
* Using the Configuration System:: Customizing your GNU system.
* Defining Services:: Adding new service definitions.
* Using the Configuration System:: Customizing your GNU system.
* Invoking guix system:: Instantiating a system configuration.
* Defining Services:: Adding new service definitions.
@end menu
@node Using the Configuration System
@ -2614,13 +2615,12 @@ daemon listening on port 2222, and allowing remote @code{root} logins
right command-line options, possibly with supporting configuration files
generated as needed (@pxref{Defining Services}).
@c TODO: update when that command exists
Assuming the above snippet is stored in the @file{my-system-config.scm}
file, the (yet unwritten!) @command{guix system --boot
my-system-config.scm} command instantiates that configuration, and makes
it the default GRUB boot entry. The normal way to change the system's
configuration is by updating this file and re-running the @command{guix
system} command.
file, the @command{guix system boot my-system-config.scm} command
instantiates that configuration, and makes it the default GRUB boot
entry (@pxref{Invoking guix system}). The normal way to change the
system's configuration is by updating this file and re-running the
@command{guix system} command.
At the Scheme level, the bulk of an @code{operating-system} declaration
is instantiated with the following monadic procedure (@pxref{The Store
@ -2635,6 +2635,33 @@ the packages, configuration files, and other supporting files needed to
instantiate @var{os}.
@end deffn
@node Invoking guix system
@subsection Invoking @code{guix system}
Once you have written an operating system declaration, as seen in the
previous section, it can be @dfn{instantiated} using the @command{guix
system} command. The synopsis is:
@example
guix system @var{options}@dots{} @var{action} @var{file}
@end example
@var{file} must be the name of a file containing an
@code{operating-system} declaration. @var{action} specifies how the
operating system is instantiate. Currently only one value is supported:
@table @code
@item vm
@cindex virtual machine
Build a virtual machine that contain the operating system declared in
@var{file}, and return a script to run that virtual machine (VM).
The VM shares its store with the host system.
@end table
@var{options} can contain any of the common build options provided by
@command{guix build} (@pxref{Invoking guix build}).
@node Defining Services
@subsection Defining Services

148
guix/scripts/system.scm Normal file
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@ -0,0 +1,148 @@
;;; 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))
(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 system dmd)
(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 value for ACTION is 'vm', which builds
a virtual machine of the given operating system.\n"))
(show-build-options-help)
(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 '(#\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)))
;;;
;;; 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))
(else (leave (_ "~a: unknown action~%")
action))))))
%default-options))
(with-error-handling
(let* ((opts (parse-options))
(file (assoc-ref opts 'argument))
(os (if file
(read-operating-system file)
(leave (_ "no configuration file specified~%"))))
(mdrv (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)))))

1
po/POTFILES.in
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@ -12,6 +12,7 @@ guix/scripts/hash.scm
guix/scripts/pull.scm
guix/scripts/substitute-binary.scm
guix/scripts/authenticate.scm
guix/scripts/system.scm
guix/gnu-maintenance.scm
guix/ui.scm
guix/http-client.scm