483 lines
17 KiB
Scheme
483 lines
17 KiB
Scheme
;;; 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 config)
|
||
#:use-module (guix ui)
|
||
#:use-module (guix store)
|
||
#:use-module (guix gexp)
|
||
#:use-module (guix derivations)
|
||
#:use-module (guix packages)
|
||
#:use-module (guix utils)
|
||
#:use-module (guix monads)
|
||
#:use-module (guix profiles)
|
||
#:use-module (guix scripts build)
|
||
#:use-module (guix build utils)
|
||
#:use-module (guix build install)
|
||
#:use-module (gnu system)
|
||
#:use-module (gnu system vm)
|
||
#:use-module (gnu system grub)
|
||
#:use-module (gnu packages grub)
|
||
#:use-module (srfi srfi-1)
|
||
#:use-module (srfi srfi-26)
|
||
#:use-module (srfi srfi-37)
|
||
#:use-module (ice-9 match)
|
||
#:export (guix-system
|
||
read-operating-system))
|
||
|
||
|
||
;;;
|
||
;;; Operating system declaration.
|
||
;;;
|
||
|
||
(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))))
|
||
(('syntax-error proc message properties form . rest)
|
||
(let ((loc (source-properties->location properties)))
|
||
(leave (_ "~a: ~a~%")
|
||
(location->string loc) message)))
|
||
(_
|
||
(leave (_ "failed to load operating system file '~a': ~s~%")
|
||
file args))))))
|
||
|
||
|
||
;;;
|
||
;;; Installation.
|
||
;;;
|
||
|
||
;; TODO: Factorize.
|
||
(define references*
|
||
(store-lift references))
|
||
(define topologically-sorted*
|
||
(store-lift topologically-sorted))
|
||
(define show-what-to-build*
|
||
(store-lift show-what-to-build))
|
||
|
||
|
||
(define* (copy-item item target
|
||
#:key (log-port (current-error-port)))
|
||
"Copy ITEM to the store under root directory TARGET and register it."
|
||
(mlet* %store-monad ((refs (references* item)))
|
||
(let ((dest (string-append target item))
|
||
(state (string-append target "/var/guix")))
|
||
(format log-port "copying '~a'...~%" item)
|
||
(copy-recursively item dest
|
||
#:log (%make-void-port "w"))
|
||
|
||
;; Register ITEM; as a side-effect, it resets timestamps, etc.
|
||
;; Explicitly use "TARGET/var/guix" as the state directory, to avoid
|
||
;; reproducing the user's current settings; see
|
||
;; <http://bugs.gnu.org/18049>.
|
||
(unless (register-path item
|
||
#:prefix target
|
||
#:state-directory state
|
||
#:references refs)
|
||
(leave (_ "failed to register '~a' under '~a'~%")
|
||
item target))
|
||
|
||
(return #t))))
|
||
|
||
(define* (copy-closure item target
|
||
#:key (log-port (current-error-port)))
|
||
"Copy ITEM and all its dependencies to the store under root directory
|
||
TARGET, and register them."
|
||
(mlet* %store-monad ((refs (references* item))
|
||
(to-copy (topologically-sorted*
|
||
(delete-duplicates (cons item refs)
|
||
string=?))))
|
||
(sequence %store-monad
|
||
(map (cut copy-item <> target #:log-port log-port)
|
||
to-copy))))
|
||
|
||
(define* (install os-drv target
|
||
#:key (log-port (current-output-port))
|
||
grub? grub.cfg device)
|
||
"Copy the output of OS-DRV and its dependencies to directory TARGET. TARGET
|
||
must be an absolute directory name since that's what 'guix-register' expects.
|
||
|
||
When GRUB? is true, install GRUB on DEVICE, using GRUB.CFG."
|
||
(define (maybe-copy to-copy)
|
||
(with-monad %store-monad
|
||
(if (string=? target "/")
|
||
(begin
|
||
(warning (_ "initializing the current root file system~%"))
|
||
(return #t))
|
||
(begin
|
||
;; Make sure the target store exists.
|
||
(mkdir-p (string-append target (%store-prefix)))
|
||
|
||
;; Copy items to the new store.
|
||
(copy-closure to-copy target #:log-port log-port)))))
|
||
|
||
(mlet* %store-monad ((os-dir -> (derivation->output-path os-drv))
|
||
(% (maybe-copy os-dir)))
|
||
|
||
;; Create a bunch of additional files.
|
||
(format log-port "populating '~a'...~%" target)
|
||
(populate-root-file-system os-dir target)
|
||
|
||
(when grub?
|
||
(unless (false-if-exception (install-grub grub.cfg device target))
|
||
(leave (_ "failed to install GRUB on device '~a'~%") device)))
|
||
|
||
(return #t)))
|
||
|
||
|
||
;;;
|
||
;;; Reconfiguration.
|
||
;;;
|
||
|
||
(define %system-profile
|
||
;; The system profile.
|
||
(string-append %state-directory "/profiles/system"))
|
||
|
||
(define-syntax-rule (save-environment-excursion body ...)
|
||
"Save the current environment variables, run BODY..., and restore them."
|
||
(let ((env (environ)))
|
||
(dynamic-wind
|
||
(const #t)
|
||
(lambda ()
|
||
body ...)
|
||
(lambda ()
|
||
(environ env)))))
|
||
|
||
(define* (switch-to-system os
|
||
#:optional (profile %system-profile))
|
||
"Make a new generation of PROFILE pointing to the directory of OS, switch to
|
||
it atomically, and then run OS's activation script."
|
||
(mlet* %store-monad ((drv (operating-system-derivation os))
|
||
(script (operating-system-activation-script os)))
|
||
(let* ((system (derivation->output-path drv))
|
||
(number (+ 1 (generation-number profile)))
|
||
(generation (generation-file-name profile number)))
|
||
(symlink system generation)
|
||
(switch-symlinks profile generation)
|
||
|
||
(format #t (_ "activating system...~%"))
|
||
|
||
;; The activation script may change $PATH, among others, so protect
|
||
;; against that.
|
||
(return (save-environment-excursion
|
||
(primitive-load (derivation->output-path script))))
|
||
|
||
;; TODO: Run 'deco reload ...'.
|
||
)))
|
||
|
||
(define-syntax-rule (unless-file-not-found exp)
|
||
(catch 'system-error
|
||
(lambda ()
|
||
exp)
|
||
(lambda args
|
||
(if (= ENOENT (system-error-errno args))
|
||
#f
|
||
(apply throw args)))))
|
||
|
||
(define* (previous-grub-entries #:optional (profile %system-profile))
|
||
"Return a list of 'menu-entry' for the generations of PROFILE."
|
||
(define (system->grub-entry system)
|
||
(unless-file-not-found
|
||
(call-with-input-file (string-append system "/parameters")
|
||
(lambda (port)
|
||
(match (read port)
|
||
(('boot-parameters ('version 0)
|
||
('label label) ('root-device root)
|
||
('kernel linux)
|
||
_ ...)
|
||
(menu-entry
|
||
(label label)
|
||
(linux linux)
|
||
(linux-arguments
|
||
(list (string-append "--root=" root)
|
||
#~(string-append "--system=" #$system)
|
||
#~(string-append "--load=" #$system "/boot")))
|
||
(initrd #~(string-append #$system "/initrd"))))
|
||
(_ ;unsupported format
|
||
(warning (_ "unrecognized boot parameters for '~a'~%")
|
||
system)
|
||
#f))))))
|
||
|
||
(let ((systems (map (cut generation-file-name profile <>)
|
||
(generation-numbers profile))))
|
||
(filter-map system->grub-entry systems)))
|
||
|
||
|
||
;;;
|
||
;;; Action.
|
||
;;;
|
||
|
||
(define* (system-derivation-for-action os action
|
||
#:key image-size)
|
||
"Return as a monadic value the derivation for OS according to ACTION."
|
||
(case action
|
||
((build init reconfigure)
|
||
(operating-system-derivation os))
|
||
((vm-image)
|
||
(system-qemu-image os #:disk-image-size image-size))
|
||
((vm)
|
||
(system-qemu-image/shared-store-script os))
|
||
((disk-image)
|
||
(system-disk-image os #:disk-image-size image-size))))
|
||
|
||
(define (grub.cfg os)
|
||
"Return the GRUB configuration file for OS."
|
||
(operating-system-grub.cfg os (previous-grub-entries)))
|
||
|
||
(define* (maybe-build drvs
|
||
#:key dry-run? use-substitutes?)
|
||
"Show what will/would be built, and actually build DRVS, unless DRY-RUN? is
|
||
true."
|
||
(with-monad %store-monad
|
||
(>>= (show-what-to-build* drvs
|
||
#:dry-run? dry-run?
|
||
#:use-substitutes? use-substitutes?)
|
||
(lambda (_)
|
||
(if dry-run?
|
||
(return #f)
|
||
(built-derivations drvs))))))
|
||
|
||
(define* (perform-action action os
|
||
#:key grub? dry-run?
|
||
use-substitutes? device target
|
||
image-size)
|
||
"Perform ACTION for OS. GRUB? specifies whether to install GRUB; DEVICE is
|
||
the target devices for GRUB; TARGET is the target root directory; IMAGE-SIZE
|
||
is the size of the image to be built, for the 'vm-image' and 'disk-image'
|
||
actions."
|
||
(mlet* %store-monad
|
||
((sys (system-derivation-for-action os action
|
||
#:image-size image-size))
|
||
(grub (package->derivation grub))
|
||
(grub.cfg (grub.cfg os))
|
||
(drvs -> (if (and grub? (memq action '(init reconfigure)))
|
||
(list sys grub grub.cfg)
|
||
(list sys)))
|
||
(% (maybe-build drvs #:dry-run? dry-run?
|
||
#:use-substitutes? use-substitutes?)))
|
||
|
||
(if dry-run?
|
||
(return #f)
|
||
(begin
|
||
(for-each (cut format #t "~a~%" <>)
|
||
(map derivation->output-path drvs))
|
||
|
||
;; Make sure GRUB is accessible.
|
||
(when grub?
|
||
(let ((prefix (derivation->output-path grub)))
|
||
(setenv "PATH"
|
||
(string-append prefix "/bin:" prefix "/sbin:"
|
||
(getenv "PATH")))))
|
||
|
||
(case action
|
||
((reconfigure)
|
||
(mlet %store-monad ((% (switch-to-system os)))
|
||
(when grub?
|
||
(unless (false-if-exception
|
||
(install-grub (derivation->output-path grub.cfg)
|
||
device "/"))
|
||
(leave (_ "failed to install GRUB on device '~a'~%")
|
||
device)))
|
||
(return #t)))
|
||
((init)
|
||
(newline)
|
||
(format #t (_ "initializing operating system under '~a'...~%")
|
||
target)
|
||
(install sys (canonicalize-path target)
|
||
#:grub? grub?
|
||
#:grub.cfg (derivation->output-path grub.cfg)
|
||
#:device device))
|
||
(else
|
||
;; All we had to do was to build SYS.
|
||
(return (derivation->output-path sys))))))))
|
||
|
||
|
||
;;;
|
||
;;; Options.
|
||
;;;
|
||
|
||
(define (show-help)
|
||
(display (_ "Usage: guix system [OPTION] ACTION FILE
|
||
Build the operating system declared in FILE according to ACTION.\n"))
|
||
(newline)
|
||
(display (_ "The valid values for ACTION are:\n"))
|
||
(display (_ "\
|
||
- 'reconfigure', switch to a new operating system configuration\n"))
|
||
(display (_ "\
|
||
- 'build', build the operating system without installing anything\n"))
|
||
(display (_ "\
|
||
- 'vm', build a virtual machine image that shares the host's store\n"))
|
||
(display (_ "\
|
||
- 'vm-image', build a freestanding virtual machine image\n"))
|
||
(display (_ "\
|
||
- 'disk-image', build a disk image, suitable for a USB stick\n"))
|
||
(display (_ "\
|
||
- 'init', initialize a root file system to run GNU.\n"))
|
||
|
||
(show-build-options-help)
|
||
(display (_ "
|
||
--image-size=SIZE for 'vm-image', produce an image of SIZE"))
|
||
(display (_ "
|
||
--no-grub for 'init', do not install GRUB"))
|
||
(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 '("no-grub") #f #f
|
||
(lambda (opt name arg result)
|
||
(alist-delete 'install-grub? result)))
|
||
(option '(#\n "dry-run") #f #f
|
||
(lambda (opt name arg result)
|
||
(alist-cons 'dry-run? #t result)))
|
||
(option '(#\s "system") #t #f
|
||
(lambda (opt name arg result)
|
||
(alist-cons 'system arg
|
||
(alist-delete 'system result eq?))))
|
||
%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)))
|
||
(install-grub? . #t)))
|
||
|
||
|
||
;;;
|
||
;;; 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)
|
||
(alist-cons 'argument arg result)
|
||
(let ((action (string->symbol arg)))
|
||
(case action
|
||
((build vm vm-image disk-image reconfigure init)
|
||
(alist-cons 'action action result))
|
||
(else (leave (_ "~a: unknown action~%")
|
||
action))))))
|
||
%default-options))
|
||
|
||
(define (match-pair car)
|
||
;; Return a procedure that matches a pair with CAR.
|
||
(match-lambda
|
||
((head . tail)
|
||
(and (eq? car head) tail))
|
||
(_ #f)))
|
||
|
||
(define (option-arguments opts)
|
||
;; Extract the plain arguments from OPTS.
|
||
(let* ((args (reverse (filter-map (match-pair 'argument) opts)))
|
||
(count (length args))
|
||
(action (assoc-ref opts 'action)))
|
||
(define (fail)
|
||
(leave (_ "wrong number of arguments for action '~a'~%")
|
||
action))
|
||
|
||
(case action
|
||
((build vm vm-image disk-image reconfigure)
|
||
(unless (= count 1)
|
||
(fail)))
|
||
((init)
|
||
(unless (= count 2)
|
||
(fail))))
|
||
args))
|
||
|
||
(with-error-handling
|
||
(let* ((opts (parse-options))
|
||
(args (option-arguments opts))
|
||
(file (first args))
|
||
(action (assoc-ref opts 'action))
|
||
(system (assoc-ref opts 'system))
|
||
(os (if file
|
||
(read-operating-system file)
|
||
(leave (_ "no configuration file specified~%"))))
|
||
|
||
(dry? (assoc-ref opts 'dry-run?))
|
||
(grub? (assoc-ref opts 'install-grub?))
|
||
(target (match args
|
||
((first second) second)
|
||
(_ #f)))
|
||
(device (and grub?
|
||
(grub-configuration-device
|
||
(operating-system-bootloader os))))
|
||
|
||
(store (open-connection)))
|
||
(set-build-options-from-command-line store opts)
|
||
|
||
(run-with-store store
|
||
(perform-action action os
|
||
#:dry-run? dry?
|
||
#:use-substitutes? (assoc-ref opts 'substitutes?)
|
||
#:image-size (assoc-ref opts 'image-size)
|
||
#:grub? grub?
|
||
#:target target #:device device)
|
||
#:system system))))
|
||
|
||
;;; system.scm ends here
|