[jackhill/guix/guix.git] / gnu / system / vm.scm

;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013 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 (gnu system vm)
  #:use-module (guix config)
  #:use-module (guix store)
  #:use-module (guix derivations)
  #:use-module (guix packages)
  #:use-module (guix monads)
  #:use-module ((gnu packages base)
                #:select (%final-inputs
                          guile-final gcc-final glibc-final
                          ld-wrapper binutils-final
                          coreutils findutils grep sed tzdata))
  #:use-module (gnu packages guile)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages less)
  #:use-module (gnu packages qemu)
  #:use-module (gnu packages parted)
  #:use-module (gnu packages zile)
  #:use-module (gnu packages grub)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages linux-initrd)
  #:use-module (gnu packages package-management)
  #:use-module ((gnu packages make-bootstrap)
                #:select (%guile-static-stripped))
  #:use-module (gnu packages system)

  #:use-module (gnu system shadow)
  #:use-module (gnu system linux)
  #:use-module (gnu system grub)
  #:use-module (gnu system dmd)
  #:use-module (gnu system)

  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:use-module (ice-9 match)

  #:export (expression->derivation-in-linux-vm
            qemu-image
            system-qemu-image))

\f
;;; Commentary:
;;;
;;; Tools to evaluate build expressions within virtual machines.
;;;
;;; Code:

(define* (expression->derivation-in-linux-vm name exp
                                             #:key
                                             (system (%current-system))
                                             (inputs '())
                                             (linux linux-libre)
                                             (initrd qemu-initrd)
                                             (qemu qemu/smb-shares)
                                             (env-vars '())
                                             (modules '())
                                             (guile-for-build
                                              (%guile-for-build))

                                             (make-disk-image? #f)
                                             (references-graphs #f)
                                             (disk-image-size
                                              (* 100 (expt 2 20))))
  "Evaluate EXP in a QEMU virtual machine running LINUX with INITRD.  In the
virtual machine, EXP has access to all of INPUTS from the store; it should put
its output files in the `/xchg' directory, which is copied to the derivation's
output when the VM terminates.

When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
DISK-IMAGE-SIZE bytes and return it.

When REFERENCES-GRAPHS is true, it must be a list of file name/store path
pairs, as for `derivation'.  The files containing the reference graphs are
made available under the /xchg CIFS share."
  ;; FIXME: Allow use of macros from other modules, as done in
  ;; `build-expression->derivation'.

  (define input-alist
    (with-monad %store-monad
      (map (match-lambda
            ((input (? package? package))
             (mlet %store-monad ((out (package-file package #:system system)))
               (return `(,input . ,out))))
            ((input (? package? package) sub-drv)
             (mlet %store-monad ((out (package-file package
                                                    #:output sub-drv
                                                    #:system system)))
               (return `(,input . ,out))))
            ((input (? derivation? drv))
             (return `(,input . ,(derivation->output-path drv))))
            ((input (? derivation? drv) sub-drv)
             (return `(,input . ,(derivation->output-path drv sub-drv))))
            ((input (and (? string?) (? store-path?) file))
             (return `(,input . ,file))))
           inputs)))

  (define builder
    ;; Code that launches the VM that evaluates EXP.
    `(let ()
       (use-modules (guix build utils)
                    (srfi srfi-1)
                    (ice-9 rdelim))

       (let ((out     (assoc-ref %outputs "out"))
             (cu      (string-append (assoc-ref %build-inputs "coreutils")
                                     "/bin"))
             (qemu    (string-append (assoc-ref %build-inputs "qemu")
                                     "/bin/qemu-system-"
                                     (car (string-split ,system #\-))))
             (img     (string-append (assoc-ref %build-inputs "qemu")
                                     "/bin/qemu-img"))
             (linux   (string-append (assoc-ref %build-inputs "linux")
                                     "/bzImage"))
             (initrd  (string-append (assoc-ref %build-inputs "initrd")
                                     "/initrd"))
             (builder (assoc-ref %build-inputs "builder")))

         ;; XXX: QEMU uses "rm -rf" when it's done to remove the temporary SMB
         ;; directory, so it really needs `rm' in $PATH.
         (setenv "PATH" cu)

         ,(if make-disk-image?
              `(zero? (system* img "create" "-f" "qcow2" "image.qcow2"
                               ,(number->string disk-image-size)))
              '(begin))

         (mkdir "xchg")

         ;; Copy the reference-graph files under xchg/ so EXP can access it.
         (begin
           ,@(match references-graphs
               (((graph-files . _) ...)
                (map (lambda (file)
                       `(copy-file ,file
                                   ,(string-append "xchg/" file)))
                     graph-files))
               (#f '())))

         (and (zero?
               (system* qemu "-nographic" "-no-reboot"
                        "-net" "nic,model=e1000"
                        "-net" (string-append "user,smb=" (getcwd))
                        "-kernel" linux
                        "-initrd" initrd
                        "-append" (string-append "console=ttyS0 --load="
                                                 builder)
                        ,@(if make-disk-image?
                              '("-hda" "image.qcow2")
                              '())))
              ,(if make-disk-image?
                   '(copy-file "image.qcow2"      ; XXX: who mkdir'd OUT?
                               out)
                   '(begin
                      (mkdir out)
                      (copy-recursively "xchg" out)))))))

  (mlet* %store-monad
      ((input-alist  (sequence %store-monad input-alist))
       (exp* ->      `(let ((%build-inputs ',input-alist))
                        ,exp))
       (user-builder (text-file "builder-in-linux-vm"
                                (object->string exp*)))
       (coreutils -> (car (assoc-ref %final-inputs "coreutils")))
       (inputs       (lower-inputs `(("qemu" ,qemu)
                                     ("linux" ,linux)
                                     ("initrd" ,initrd)
                                     ("coreutils" ,coreutils)
                                     ("builder" ,user-builder)
                                     ,@inputs))))
    (derivation-expression name builder
                           #:system system
                           #:inputs inputs
                           #:env-vars env-vars
                           #:modules (delete-duplicates
                                      `((guix build utils)
                                        ,@modules))
                           #:guile-for-build guile-for-build
                           #:references-graphs references-graphs)))

(define* (qemu-image #:key
                     (name "qemu-image")
                     (system (%current-system))
                     (disk-image-size (* 100 (expt 2 20)))
                     grub-configuration
                     (initialize-store? #f)
                     (populate #f)
                     (inputs '())
                     (inputs-to-copy '()))
  "Return a bootable, stand-alone QEMU image.  The returned image is a full
disk image, with a GRUB installation that uses GRUB-CONFIGURATION as its
configuration file (GRUB-CONFIGURATION must be the name of a file in the VM.)

INPUTS-TO-COPY is a list of inputs (as for packages) whose closure is copied
into the image being built.  When INITIALIZE-STORE? is true, initialize the
store database in the image so that Guix can be used in the image.

POPULATE is a list of directives stating directories or symlinks to be created
in the disk image partition.  It is evaluated once the image has been
populated with INPUTS-TO-COPY.  It can be used to provide additional files,
such as /etc files."
  (define (input->name+derivation tuple)
    (with-monad %store-monad
      (match tuple
        ((name (? package? package))
         (mlet %store-monad ((drv (package->derivation package system)))
           (return `(,name . ,(derivation->output-path drv)))))
        ((name (? package? package) sub-drv)
         (mlet %store-monad ((drv (package->derivation package system)))
           (return `(,name . ,(derivation->output-path drv sub-drv)))))
        ((name (? derivation? drv))
         (return `(,name . ,(derivation->output-path drv))))
        ((name (? derivation? drv) sub-drv)
         (return `(,name . ,(derivation->output-path drv sub-drv))))
        ((input (and (? string?) (? store-path?) file))
         (return `(,input . ,file))))))

  (mlet %store-monad
      ((graph (sequence %store-monad
                        (map input->name+derivation inputs-to-copy))))
   (expression->derivation-in-linux-vm
    "qemu-image"
    `(let ()
       (use-modules (ice-9 rdelim)
                    (srfi srfi-1)
                    (guix build utils)
                    (guix build linux-initrd))

       (let ((parted  (string-append (assoc-ref %build-inputs "parted")
                                     "/sbin/parted"))
             (mkfs    (string-append (assoc-ref %build-inputs "e2fsprogs")
                                     "/sbin/mkfs.ext3"))
             (grub    (string-append (assoc-ref %build-inputs "grub")
                                     "/sbin/grub-install"))
             (umount  (string-append (assoc-ref %build-inputs "util-linux")
                                     "/bin/umount")) ; XXX: add to Guile
             (grub.cfg ,grub-configuration))

         (define (read-reference-graph port)
           ;; Return a list of store paths from the reference graph at PORT.
           ;; The data at PORT is the format produced by #:references-graphs.
           (let loop ((line   (read-line port))
                      (result '()))
             (cond ((eof-object? line)
                    (delete-duplicates result))
                   ((string-prefix? "/" line)
                    (loop (read-line port)
                          (cons line result)))
                   (else
                    (loop (read-line port)
                          result)))))

         (define (things-to-copy)
           ;; Return the list of store files to copy to the image.
           (define (graph-from-file file)
             (call-with-input-file file
               read-reference-graph))

           ,(match inputs-to-copy
              (((graph-files . _) ...)
               `(let* ((graph-files ',(map (cut string-append "/xchg/" <>)
                                           graph-files))
                       (paths       (append-map graph-from-file graph-files)))
                  (delete-duplicates paths)))
              (#f ''())))

         ;; GRUB is full of shell scripts.
         (setenv "PATH"
                 (string-append (dirname grub) ":"
                                (assoc-ref %build-inputs "coreutils") "/bin:"
                                (assoc-ref %build-inputs "findutils") "/bin:"
                                (assoc-ref %build-inputs "sed") "/bin:"
                                (assoc-ref %build-inputs "grep") "/bin:"
                                (assoc-ref %build-inputs "gawk") "/bin"))

         (display "creating partition table...\n")
         (and (zero? (system* parted "/dev/vda" "mklabel" "msdos"
                              "mkpart" "primary" "ext2" "1MiB"
                              ,(format #f "~aB"
                                       (- disk-image-size
                                          (* 5 (expt 2 20))))))
              (begin
                (display "creating ext3 partition...\n")
                (and (zero? (system* mkfs "-F" "/dev/vda1"))
                     (let ((store (string-append "/fs" ,%store-directory)))
                       (display "mounting partition...\n")
                       (mkdir "/fs")
                       (mount "/dev/vda1" "/fs" "ext3")
                       (mkdir-p "/fs/boot/grub")
                       (symlink grub.cfg "/fs/boot/grub/grub.cfg")

                       ;; Populate the image's store.
                       (mkdir-p store)
                       (chmod store #o1775)
                       (for-each (lambda (thing)
                                   (copy-recursively thing
                                                     (string-append "/fs"
                                                                    thing)))
                                 (things-to-copy))

                       ;; Populate /dev.
                       (make-essential-device-nodes #:root "/fs")

                       ;; Optionally, register the inputs in the image's store.
                       (let* ((guix     (assoc-ref %build-inputs "guix"))
                              (register (string-append guix
                                                       "/sbin/guix-register")))
                         ,@(if initialize-store?
                               (match inputs-to-copy
                                 (((graph-files . _) ...)
                                  (map (lambda (closure)
                                         `(system* register "--prefix" "/fs"
                                                   ,(string-append "/xchg/"
                                                                   closure)))
                                       graph-files)))
                               '(#f)))

                       ;; Evaluate the POPULATE directives.
                       ,@(let loop ((directives populate)
                                    (statements '()))
                           (match directives
                             (()
                              (reverse statements))
                             ((('directory name) rest ...)
                              (loop rest
                                    (cons `(mkdir-p ,(string-append "/fs" name))
                                          statements)))
                             ((('directory name uid gid) rest ...)
                              (let ((dir (string-append "/fs" name)))
                                (loop rest
                                      (cons* `(chown ,dir ,uid ,gid)
                                             `(mkdir-p ,dir)
                                             statements))))
                             (((new '-> old) rest ...)
                              (loop rest
                                    (cons `(symlink ,old
                                                    ,(string-append "/fs" new))
                                          statements)))))

                       (and=> (assoc-ref %build-inputs "populate")
                              (lambda (populate)
                                (chdir "/fs")
                                (primitive-load populate)
                                (chdir "/")))

                       (display "clearing file timestamps...\n")
                       (for-each (lambda (file)
                                   (let ((s (lstat file)))
                                     ;; XXX: Guile uses libc's 'utime' function
                                     ;; (not 'futime'), so the timestamp of
                                     ;; symlinks cannot be changed, and there
                                     ;; are symlinks here pointing to
                                     ;; /nix/store, which is the host,
                                     ;; read-only store.
                                     (unless (eq? (stat:type s) 'symlink)
                                       (utime file 0 0 0 0))))
                                 (find-files "/fs" ".*"))

                       (and (zero?
                             (system* grub "--no-floppy"
                                      "--boot-directory" "/fs/boot"
                                      "/dev/vda"))
                            (zero? (system* umount "/fs"))
                            (reboot))))))))
    #:system system
    #:inputs `(("parted" ,parted)
               ("grub" ,grub)
               ("e2fsprogs" ,e2fsprogs)

               ;; For shell scripts.
               ("sed" ,(car (assoc-ref %final-inputs "sed")))
               ("grep" ,(car (assoc-ref %final-inputs "grep")))
               ("coreutils" ,(car (assoc-ref %final-inputs "coreutils")))
               ("findutils" ,(car (assoc-ref %final-inputs "findutils")))
               ("gawk" ,(car (assoc-ref %final-inputs "gawk")))
               ("util-linux" ,util-linux)

               ,@(if initialize-store?
                     `(("guix" ,guix))
                     '())

               ,@inputs-to-copy)
    #:make-disk-image? #t
    #:disk-image-size disk-image-size
    #:references-graphs graph
    #:modules '((guix build utils)
                (guix build linux-initrd)))))

\f
;;;
;;; Stand-alone VM image.
;;;

(define %demo-operating-system
  (operating-system
   (host-name "gnu")
   (timezone "Europe/Paris")
   (locale "en_US.UTF-8")
   (users (list (user-account
                 (name "guest")
                 (password "")
                 (uid 1000) (gid 100)
                 (comment "Guest of GNU")
                 (home-directory "/home/guest"))))
   (packages (list coreutils
                   bash
                   guile-2.0
                   dmd
                   gcc-final
                   ld-wrapper                    ; must come before BINUTILS
                   binutils-final
                   glibc-final
                   inetutils
                   findutils
                   grep
                   sed
                   procps
                   psmisc
                   zile
                   less
                   tzdata
                   guix))))

(define* (system-qemu-image #:optional (os %demo-operating-system)
                            #:key (disk-image-size (* 900 (expt 2 20))))
  "Return the derivation of a QEMU image of DISK-IMAGE-SIZE bytes of the GNU
system as described by OS."
  (mlet* %store-monad
      ((os-drv      (operating-system-derivation os))
       (os-dir   -> (derivation->output-path os-drv))
       (grub.cfg -> (string-append os-dir "/grub.cfg"))
       (build-user-gid (anym %store-monad         ; XXX
                             (lambda (service)
                               (and (equal? '(guix-daemon)
                                            (service-provision service))
                                    (match (service-user-groups service)
                                      ((group)
                                       (user-group-id group)))))
                             (operating-system-services os)))
       (populate -> `((directory "/nix/store" 0 ,build-user-gid)
                      (directory "/etc")
                      (directory "/var/log")      ; for dmd
                      (directory "/var/run/nscd")
                      (directory "/var/nix/gcroots")
                      ("/var/nix/gcroots/system" -> ,os-dir)
                      (directory "/tmp")
                      (directory "/var/nix/profiles/per-user/root" 0 0)
                      (directory "/var/nix/profiles/per-user/guest"
                                 1000 100)
                      (directory "/home/guest" 1000 100))))
    (qemu-image  #:grub-configuration grub.cfg
                 #:populate populate
                 #:disk-image-size disk-image-size
                 #:initialize-store? #t
                 #:inputs-to-copy `(("system" ,os-drv)))))

;;; vm.scm ends here
Commit	Line	Data
04086015 LC	1	;;; GNU Guix --- Functional package management for GNU
	2	;;; Copyright © 2013 Ludovic Courtès <ludo@gnu.org>
	3	;;;
	4	;;; This file is part of GNU Guix.
	5	;;;
	6	;;; GNU Guix is free software; you can redistribute it and/or modify it
	7	;;; under the terms of the GNU General Public License as published by
	8	;;; the Free Software Foundation; either version 3 of the License, or (at
	9	;;; your option) any later version.
	10	;;;
	11	;;; GNU Guix is distributed in the hope that it will be useful, but
	12	;;; WITHOUT ANY WARRANTY; without even the implied warranty of
	13	;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	;;; GNU General Public License for more details.
	15	;;;
	16	;;; You should have received a copy of the GNU General Public License
	17	;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
	18
	19	(define-module (gnu system vm)
93d44bd8	20	#:use-module (guix config)
04086015 LC	21	#:use-module (guix store)
	22	#:use-module (guix derivations)
	23	#:use-module (guix packages)
d9f0a237	24	#:use-module (guix monads)
9f84f12f LC	25	#:use-module ((gnu packages base)
	26	#:select (%final-inputs
	27	guile-final gcc-final glibc-final
4f62d8d6	28	ld-wrapper binutils-final
3141a8bd	29	coreutils findutils grep sed tzdata))
1b89a66e LC	30	#:use-module (gnu packages guile)
1b89a66e LC	31	#:use-module (gnu packages bash)
4f62d8d6	32	#:use-module (gnu packages less)
04086015 LC	33	#:use-module (gnu packages qemu)
04086015 LC	34	#:use-module (gnu packages parted)
5b16ff09	35	#:use-module (gnu packages zile)
04086015 LC	36	#:use-module (gnu packages grub)
	37	#:use-module (gnu packages linux)
	38	#:use-module (gnu packages linux-initrd)
30f25b03	39	#:use-module (gnu packages package-management)
04086015 LC	40	#:use-module ((gnu packages make-bootstrap)
04086015 LC	41	#:select (%guile-static-stripped))
a843fe22	42	#:use-module (gnu packages system)
0ded70f3 LC	43
	44	#:use-module (gnu system shadow)
	45	#:use-module (gnu system linux)
	46	#:use-module (gnu system grub)
4646e30a	47	#:use-module (gnu system dmd)
033adfe7	48	#:use-module (gnu system)
0ded70f3	49
ca85d7bc	50	#:use-module (srfi srfi-1)
04086015 LC	51	#:use-module (srfi srfi-26)
04086015 LC	52	#:use-module (ice-9 match)
0ded70f3	53
04086015	54	#:export (expression->derivation-in-linux-vm
aedb72fb LC	55	qemu-image
aedb72fb LC	56	system-qemu-image))
04086015 LC	57
	58	\f
	59	;;; Commentary:
	60	;;;
	61	;;; Tools to evaluate build expressions within virtual machines.
	62	;;;
	63	;;; Code:
	64
d9f0a237	65	(define* (expression->derivation-in-linux-vm name exp
04086015	66	#:key
2455085a LC	67	(system (%current-system))
2455085a LC	68	(inputs '())
04086015 LC	69	(linux linux-libre)
04086015 LC	70	(initrd qemu-initrd)
50731c51	71	(qemu qemu/smb-shares)
04086015 LC	72	(env-vars '())
	73	(modules '())
	74	(guile-for-build
	75	(%guile-for-build))
	76
	77	(make-disk-image? #f)
ca85d7bc	78	(references-graphs #f)
04086015 LC	79	(disk-image-size
	80	(* 100 (expt 2 20))))
	81	"Evaluate EXP in a QEMU virtual machine running LINUX with INITRD. In the
	82	virtual machine, EXP has access to all of INPUTS from the store; it should put
	83	its output files in the `/xchg' directory, which is copied to the derivation's
	84	output when the VM terminates.
	85
	86	When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of
ca85d7bc LC	87	DISK-IMAGE-SIZE bytes and return it.
	88
	89	When REFERENCES-GRAPHS is true, it must be a list of file name/store path
	90	pairs, as for `derivation'. The files containing the reference graphs are
	91	made available under the /xchg CIFS share."
8ab73e91 LC	92	;; FIXME: Allow use of macros from other modules, as done in
	93	;; `build-expression->derivation'.
	94
04086015	95	(define input-alist
d9f0a237 LC	96	(with-monad %store-monad
	97	(map (match-lambda
	98	((input (? package? package))
	99	(mlet %store-monad ((out (package-file package #:system system)))
	100	(return `(,input . ,out))))
	101	((input (? package? package) sub-drv)
	102	(mlet %store-monad ((out (package-file package
	103	#:output sub-drv
	104	#:system system)))
	105	(return `(,input . ,out))))
	106	((input (? derivation? drv))
	107	(return `(,input . ,(derivation->output-path drv))))
	108	((input (? derivation? drv) sub-drv)
	109	(return `(,input . ,(derivation->output-path drv sub-drv))))
	110	((input (and (? string?) (? store-path?) file))
	111	(return `(,input . ,file))))
	112	inputs)))
04086015 LC	113
	114	(define builder
	115	;; Code that launches the VM that evaluates EXP.
ca85d7bc LC	116	`(let ()
	117	(use-modules (guix build utils)
	118	(srfi srfi-1)
	119	(ice-9 rdelim))
04086015 LC	120
	121	(let ((out (assoc-ref %outputs "out"))
	122	(cu (string-append (assoc-ref %build-inputs "coreutils")
	123	"/bin"))
	124	(qemu (string-append (assoc-ref %build-inputs "qemu")
	125	"/bin/qemu-system-"
	126	(car (string-split ,system #\-))))
	127	(img (string-append (assoc-ref %build-inputs "qemu")
	128	"/bin/qemu-img"))
	129	(linux (string-append (assoc-ref %build-inputs "linux")
	130	"/bzImage"))
	131	(initrd (string-append (assoc-ref %build-inputs "initrd")
	132	"/initrd"))
	133	(builder (assoc-ref %build-inputs "builder")))
	134
	135	;; XXX: QEMU uses "rm -rf" when it's done to remove the temporary SMB
	136	;; directory, so it really needs `rm' in $PATH.
	137	(setenv "PATH" cu)
	138
	139	,(if make-disk-image?
30e45750	140	`(zero? (system* img "create" "-f" "qcow2" "image.qcow2"
04086015 LC	141	,(number->string disk-image-size)))
	142	'(begin))
	143
	144	(mkdir "xchg")
ca85d7bc LC	145
	146	;; Copy the reference-graph files under xchg/ so EXP can access it.
	147	(begin
	148	,@(match references-graphs
	149	(((graph-files . _) ...)
	150	(map (lambda (file)
	151	`(copy-file ,file
	152	,(string-append "xchg/" file)))
	153	graph-files))
	154	(#f '())))
	155
04086015 LC	156	(and (zero?
	157	(system* qemu "-nographic" "-no-reboot"
	158	"-net" "nic,model=e1000"
	159	"-net" (string-append "user,smb=" (getcwd))
	160	"-kernel" linux
	161	"-initrd" initrd
	162	"-append" (string-append "console=ttyS0 --load="
	163	builder)
	164	,@(if make-disk-image?
	165	'("-hda" "image.qcow2")
	166	'())))
	167	,(if make-disk-image?
	168	'(copy-file "image.qcow2" ; XXX: who mkdir'd OUT?
	169	out)
	170	'(begin
	171	(mkdir out)
	172	(copy-recursively "xchg" out)))))))
	173
d9f0a237 LC	174	(mlet* %store-monad
	175	((input-alist (sequence %store-monad input-alist))
	176	(exp* -> `(let ((%build-inputs ',input-alist))
	177	,exp))
	178	(user-builder (text-file "builder-in-linux-vm"
	179	(object->string exp*)))
	180	(coreutils -> (car (assoc-ref %final-inputs "coreutils")))
	181	(inputs (lower-inputs `(("qemu" ,qemu)
	182	("linux" ,linux)
	183	("initrd" ,initrd)
	184	("coreutils" ,coreutils)
	185	("builder" ,user-builder)
	186	,@inputs))))
dd1a5a15 LC	187	(derivation-expression name builder
	188	#:system system
	189	#:inputs inputs
d9f0a237 LC	190	#:env-vars env-vars
	191	#:modules (delete-duplicates
	192	`((guix build utils)
	193	,@modules))
	194	#:guile-for-build guile-for-build
	195	#:references-graphs references-graphs)))
	196
	197	(define* (qemu-image #:key
04086015 LC	198	(name "qemu-image")
	199	(system (%current-system))
	200	(disk-image-size (* 100 (expt 2 20)))
0e2ddecd	201	grub-configuration
30f25b03	202	(initialize-store? #f)
785859d3	203	(populate #f)
93d44bd8	204	(inputs '())
002e5ba8	205	(inputs-to-copy '()))
1b89a66e	206	"Return a bootable, stand-alone QEMU image. The returned image is a full
0e2ddecd	207	disk image, with a GRUB installation that uses GRUB-CONFIGURATION as its
033adfe7	208	configuration file (GRUB-CONFIGURATION must be the name of a file in the VM.)
93d44bd8 LC	209
93d44bd8 LC	210	INPUTS-TO-COPY is a list of inputs (as for packages) whose closure is copied
30f25b03 LC	211	into the image being built. When INITIALIZE-STORE? is true, initialize the
30f25b03 LC	212	store database in the image so that Guix can be used in the image.
785859d3	213
d5d0f286 LC	214	POPULATE is a list of directives stating directories or symlinks to be created
	215	in the disk image partition. It is evaluated once the image has been
	216	populated with INPUTS-TO-COPY. It can be used to provide additional files,
	217	such as /etc files."
d9f0a237 LC	218	(define (input->name+derivation tuple)
	219	(with-monad %store-monad
	220	(match tuple
	221	((name (? package? package))
	222	(mlet %store-monad ((drv (package->derivation package system)))
	223	(return `(,name . ,(derivation->output-path drv)))))
	224	((name (? package? package) sub-drv)
	225	(mlet %store-monad ((drv (package->derivation package system)))
	226	(return `(,name . ,(derivation->output-path drv sub-drv)))))
	227	((name (? derivation? drv))
	228	(return `(,name . ,(derivation->output-path drv))))
	229	((name (? derivation? drv) sub-drv)
	230	(return `(,name . ,(derivation->output-path drv sub-drv))))
	231	((input (and (? string?) (? store-path?) file))
	232	(return `(,input . ,file))))))
	233
	234	(mlet %store-monad
	235	((graph (sequence %store-monad
	236	(map input->name+derivation inputs-to-copy))))
	237	(expression->derivation-in-linux-vm
	238	"qemu-image"
	239	`(let ()
	240	(use-modules (ice-9 rdelim)
	241	(srfi srfi-1)
	242	(guix build utils)
	243	(guix build linux-initrd))
	244
	245	(let ((parted (string-append (assoc-ref %build-inputs "parted")
	246	"/sbin/parted"))
	247	(mkfs (string-append (assoc-ref %build-inputs "e2fsprogs")
	248	"/sbin/mkfs.ext3"))
	249	(grub (string-append (assoc-ref %build-inputs "grub")
	250	"/sbin/grub-install"))
	251	(umount (string-append (assoc-ref %build-inputs "util-linux")
	252	"/bin/umount")) ; XXX: add to Guile
033adfe7	253	(grub.cfg ,grub-configuration))
d9f0a237 LC	254
	255	(define (read-reference-graph port)
	256	;; Return a list of store paths from the reference graph at PORT.
	257	;; The data at PORT is the format produced by #:references-graphs.
	258	(let loop ((line (read-line port))
	259	(result '()))
	260	(cond ((eof-object? line)
	261	(delete-duplicates result))
	262	((string-prefix? "/" line)
	263	(loop (read-line port)
	264	(cons line result)))
	265	(else
	266	(loop (read-line port)
	267	result)))))
	268
	269	(define (things-to-copy)
	270	;; Return the list of store files to copy to the image.
	271	(define (graph-from-file file)
	272	(call-with-input-file file
	273	read-reference-graph))
	274
	275	,(match inputs-to-copy
	276	(((graph-files . _) ...)
	277	`(let* ((graph-files ',(map (cut string-append "/xchg/" <>)
	278	graph-files))
	279	(paths (append-map graph-from-file graph-files)))
	280	(delete-duplicates paths)))
	281	(#f ''())))
	282
	283	;; GRUB is full of shell scripts.
	284	(setenv "PATH"
	285	(string-append (dirname grub) ":"
	286	(assoc-ref %build-inputs "coreutils") "/bin:"
	287	(assoc-ref %build-inputs "findutils") "/bin:"
	288	(assoc-ref %build-inputs "sed") "/bin:"
	289	(assoc-ref %build-inputs "grep") "/bin:"
	290	(assoc-ref %build-inputs "gawk") "/bin"))
	291
	292	(display "creating partition table...\n")
	293	(and (zero? (system* parted "/dev/vda" "mklabel" "msdos"
	294	"mkpart" "primary" "ext2" "1MiB"
	295	,(format #f "~aB"
	296	(- disk-image-size
	297	(* 5 (expt 2 20))))))
	298	(begin
	299	(display "creating ext3 partition...\n")
	300	(and (zero? (system* mkfs "-F" "/dev/vda1"))
	301	(let ((store (string-append "/fs" ,%store-directory)))
	302	(display "mounting partition...\n")
	303	(mkdir "/fs")
	304	(mount "/dev/vda1" "/fs" "ext3")
	305	(mkdir-p "/fs/boot/grub")
	306	(symlink grub.cfg "/fs/boot/grub/grub.cfg")
	307
	308	;; Populate the image's store.
	309	(mkdir-p store)
	310	(chmod store #o1775)
	311	(for-each (lambda (thing)
	312	(copy-recursively thing
	313	(string-append "/fs"
	314	thing)))
033adfe7	315	(things-to-copy))
d9f0a237 LC	316
	317	;; Populate /dev.
	318	(make-essential-device-nodes #:root "/fs")
	319
	320	;; Optionally, register the inputs in the image's store.
	321	(let* ((guix (assoc-ref %build-inputs "guix"))
	322	(register (string-append guix
	323	"/sbin/guix-register")))
	324	,@(if initialize-store?
	325	(match inputs-to-copy
	326	(((graph-files . _) ...)
	327	(map (lambda (closure)
	328	`(system* register "--prefix" "/fs"
	329	,(string-append "/xchg/"
	330	closure)))
	331	graph-files)))
	332	'(#f)))
	333
	334	;; Evaluate the POPULATE directives.
	335	,@(let loop ((directives populate)
	336	(statements '()))
	337	(match directives
	338	(()
	339	(reverse statements))
	340	((('directory name) rest ...)
	341	(loop rest
	342	(cons `(mkdir-p ,(string-append "/fs" name))
	343	statements)))
	344	((('directory name uid gid) rest ...)
	345	(let ((dir (string-append "/fs" name)))
	346	(loop rest
	347	(cons* `(chown ,dir ,uid ,gid)
	348	`(mkdir-p ,dir)
	349	statements))))
	350	(((new '-> old) rest ...)
	351	(loop rest
	352	(cons `(symlink ,old
	353	,(string-append "/fs" new))
	354	statements)))))
	355
	356	(and=> (assoc-ref %build-inputs "populate")
	357	(lambda (populate)
	358	(chdir "/fs")
	359	(primitive-load populate)
	360	(chdir "/")))
	361
	362	(display "clearing file timestamps...\n")
	363	(for-each (lambda (file)
	364	(let ((s (lstat file)))
	365	;; XXX: Guile uses libc's 'utime' function
	366	;; (not 'futime'), so the timestamp of
	367	;; symlinks cannot be changed, and there
	368	;; are symlinks here pointing to
	369	;; /nix/store, which is the host,
	370	;; read-only store.
	371	(unless (eq? (stat:type s) 'symlink)
	372	(utime file 0 0 0 0))))
	373	(find-files "/fs" ".*"))
	374
	375	(and (zero?
	376	(system* grub "--no-floppy"
	377	"--boot-directory" "/fs/boot"
	378	"/dev/vda"))
	379	(zero? (system* umount "/fs"))
380	(reboot))))))))
381	#:system system
382	#:inputs `(("parted" ,parted)
383	("grub" ,grub)
384	("e2fsprogs" ,e2fsprogs)
d9f0a237 LC	385
	386	;; For shell scripts.
	387	("sed" ,(car (assoc-ref %final-inputs "sed")))
	388	("grep" ,(car (assoc-ref %final-inputs "grep")))
	389	("coreutils" ,(car (assoc-ref %final-inputs "coreutils")))
	390	("findutils" ,(car (assoc-ref %final-inputs "findutils")))
	391	("gawk" ,(car (assoc-ref %final-inputs "gawk")))
	392	("util-linux" ,util-linux)
	393
	394	,@(if initialize-store?
	395	`(("guix" ,guix))
	396	'())
	397
	398	,@inputs-to-copy)
	399	#:make-disk-image? #t
	400	#:disk-image-size disk-image-size
	401	#:references-graphs graph
	402	#:modules '((guix build utils)
	403	(guix build linux-initrd)))))
04086015 LC	404
	405	\f
	406	;;;
aedb72fb	407	;;; Stand-alone VM image.
04086015 LC	408	;;;
04086015 LC	409
033adfe7 LC	410	(define %demo-operating-system
	411	(operating-system
	412	(host-name "gnu")
	413	(timezone "Europe/Paris")
3141a8bd	414	(locale "en_US.UTF-8")
033adfe7 LC	415	(users (list (user-account
	416	(name "guest")
	417	(password "")
	418	(uid 1000) (gid 100)
	419	(comment "Guest of GNU")
78ed0038	420	(home-directory "/home/guest"))))
4f62d8d6 LC	421	(packages (list coreutils
	422	bash
	423	guile-2.0
	424	dmd
	425	gcc-final
	426	ld-wrapper ; must come before BINUTILS
	427	binutils-final
	428	glibc-final
	429	inetutils
	430	findutils
	431	grep
	432	sed
	433	procps
	434	psmisc
	435	zile
	436	less
3141a8bd	437	tzdata
4f62d8d6	438	guix))))
033adfe7	439
22dd0438 LC	440	(define* (system-qemu-image #:optional (os %demo-operating-system)
	441	#:key (disk-image-size (* 900 (expt 2 20))))
	442	"Return the derivation of a QEMU image of DISK-IMAGE-SIZE bytes of the GNU
	443	system as described by OS."
0b8a376b	444	(mlet* %store-monad
033adfe7 LC	445	((os-drv (operating-system-derivation os))
	446	(os-dir -> (derivation->output-path os-drv))
	447	(grub.cfg -> (string-append os-dir "/grub.cfg"))
	448	(build-user-gid (anym %store-monad ; XXX
	449	(lambda (service)
	450	(and (equal? '(guix-daemon)
	451	(service-provision service))
	452	(match (service-user-groups service)
	453	((group)
	454	(user-group-id group)))))
	455	(operating-system-services os)))
d9f0a237 LC	456	(populate -> `((directory "/nix/store" 0 ,build-user-gid)
	457	(directory "/etc")
	458	(directory "/var/log") ; for dmd
	459	(directory "/var/run/nscd")
d9f0a237	460	(directory "/var/nix/gcroots")
033adfe7	461	("/var/nix/gcroots/system" -> ,os-dir)
d9f0a237 LC	462	(directory "/tmp")
	463	(directory "/var/nix/profiles/per-user/root" 0 0)
	464	(directory "/var/nix/profiles/per-user/guest"
	465	1000 100)
033adfe7	466	(directory "/home/guest" 1000 100))))
d9f0a237 LC	467	(qemu-image #:grub-configuration grub.cfg
d9f0a237 LC	468	#:populate populate
22dd0438	469	#:disk-image-size disk-image-size
d9f0a237	470	#:initialize-store? #t
033adfe7	471	#:inputs-to-copy `(("system" ,os-drv)))))
04086015 LC	472
04086015 LC	473	;;; vm.scm ends here