Remove VM generation dead-code.

This code duplicates the (gnu system image) and (gnu build image) code. Using
VM for image generation is not needed, not portable and really slow. Remove
all the VM image generation code to make sure that only the image API is used.

* gnu/build/vm.scm: Remove it. Move the qemu-command procedure to ...
* gnu/build/marionette.scm: ... here.
* gnu/local.mk (GNU_SYSTEM_MODULES): Adapt it.
* tests/modules.scm: Ditto.
* gnu/tests/install.scm: Ditto.
* gnu/system/vm.scm: Adapt it and remove expression->derivation-in-linux-vm,
qemu-img, system-qemu-image/shared-store and system-docker-image procedures.
* doc/guix.texi (G-Expressions): Adapt it.

1 files changed, 2 insertions, 485 deletions

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index db5c4132c01..3370df1c81a 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -35,7 +35,7 @@
   #:use-module (guix base32)
   #:use-module ((guix self) #:select (make-config.scm))
 
-  #:use-module ((gnu build vm)
+  #:use-module ((gnu build marionette)
                 #:select (qemu-command))
   #:use-module (gnu packages base)
   #:use-module (gnu packages bootloaders)
@@ -67,13 +67,8 @@
   #:use-module (rnrs bytevectors)
   #:use-module (ice-9 match)
 
-  #:export (expression->derivation-in-linux-vm
-            qemu-image
-            virtualized-operating-system
-
-            system-qemu-image/shared-store
+  #:export (virtualized-operating-system
             system-qemu-image/shared-store-script
-            system-docker-image
 
             virtual-machine
             virtual-machine?))
@@ -126,444 +121,6 @@
                            %default-msize-value))
           (check? #f))))
 
-(define not-config?
-  ;; Select (guix …) and (gnu …) modules, except (guix config).
-  (match-lambda
-    (('guix 'config) #f)
-    (('guix rest ...) #t)
-    (('gnu rest ...) #t)
-    (rest #f)))
-
-(define gcrypt-sqlite3&co
-  ;; Guile-Gcrypt, Guile-SQLite3, and their propagated inputs.
-  (append-map (lambda (package)
-                (cons package
-                      (match (package-transitive-propagated-inputs package)
-                        (((labels packages) ...)
-                         packages))))
-              (list guile-gcrypt guile-sqlite3)))
-
-(define* (expression->derivation-in-linux-vm name exp
-                                             #:key
-                                             (system (%current-system))
-                                             (linux linux-libre)
-                                             initrd
-                                             (qemu qemu-minimal)
-                                             (env-vars '())
-                                             (guile-for-build
-                                              (%guile-for-build))
-                                             (file-systems
-                                              %linux-vm-file-systems)
-
-                                             (single-file-output? #f)
-                                             (make-disk-image? #f)
-                                             (references-graphs #f)
-                                             (memory-size 256)
-                                             (disk-image-format "qcow2")
-                                             (disk-image-size 'guess)
-
-                                             (substitutable? #t))
-  "Evaluate EXP in a QEMU virtual machine running LINUX with INITRD (a
-derivation).  The virtual machine runs with MEMORY-SIZE MiB of memory.  In the
-virtual machine, EXP has access to FILE-SYSTEMS, which, by default, includes a
-9p share of the store, the '/xchg' where EXP should put its output file(s),
-and a 9p share of /tmp.
-
-If SINGLE-FILE-OUTPUT? is true, copy a single file from '/xchg' to OUTPUT.
-Otherwise, copy the contents of /xchg to a new directory OUTPUT.
-
-When MAKE-DISK-IMAGE? is true, then create a QEMU disk image of type
-DISK-IMAGE-FORMAT (e.g., 'qcow2' or 'raw'), of DISK-IMAGE-SIZE bytes and
-return it.  When DISK-IMAGE-SIZE is 'guess, estimate the image size based
-based on the size of the closure of REFERENCES-GRAPHS.
-
-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.
-
-SUBSTITUTABLE? determines whether the returned derivation should be marked as
-substitutable."
-  (define user-builder
-    (program-file "builder-in-linux-vm" exp))
-
-  (define loader
-    ;; Invoke USER-BUILDER instead using 'primitive-load'.  The reason for
-    ;; this is to allow USER-BUILDER to dlopen stuff by using a full-featured
-    ;; Guile, which it couldn't do using the statically-linked guile used in
-    ;; the initrd.  See example at
-    ;; <https://lists.gnu.org/archive/html/guix-devel/2017-10/msg00233.html>.
-    (program-file "linux-vm-loader"
-                  ;; Communicate USER-BUILDER's exit status via /xchg so that
-                  ;; the host can distinguish between success, failure, and
-                  ;; kernel panic.
-                  #~(let ((status (system* #$user-builder)))
-                      (call-with-output-file "/xchg/.exit-status"
-                        (lambda (port)
-                          (write status port)))
-                      (sync)
-                      (reboot))))
-
-  (define-syntax-rule (check predicate)
-    (let-system (system target)
-      (predicate (or target system))))
-
-  (let ((initrd (or initrd
-                    (base-initrd file-systems
-                                 #:on-error 'backtrace
-                                 #:linux linux
-                                 #:linux-modules %base-initrd-modules
-                                 #:qemu-networking? #t))))
-
-    (define builder
-      ;; Code that launches the VM that evaluates EXP.
-      (with-extensions gcrypt-sqlite3&co
-        (with-imported-modules `(,@(source-module-closure
-                                    '((guix build utils)
-                                      (gnu build vm))
-                                    #:select? not-config?)
-
-                                 ;; For consumption by (gnu store database).
-                                 ((guix config) => ,(make-config.scm)))
-          #~(begin
-              (use-modules (guix build utils)
-                           (gnu build vm))
-
-              ;; Allow non-ASCII file names--e.g., 'nss-certs'--to be decoded
-              ;; by 'estimated-partition-size' below.
-              (setenv "GUIX_LOCPATH"
-                      #+(file-append glibc-utf8-locales "/lib/locale"))
-              (setlocale LC_ALL "en_US.utf8")
-
-              (let* ((native-inputs
-                      '#+(list qemu (canonical-package coreutils)))
-                     (linux   (string-append
-                               #+linux "/"
-                               #+(system-linux-image-file-name system)))
-                     (initrd  #+initrd)
-                     (loader  #+loader)
-                     (graphs  '#$(match references-graphs
-                                   (((graph-files . _) ...) graph-files)
-                                   (_ #f)))
-                     (target  #$(let-system (system target)
-                                  (or target system)))
-                     (size    #$(if (eq? 'guess disk-image-size)
-                                    #~(+ (* 70 (expt 2 20)) ;ESP
-                                         (estimated-partition-size graphs))
-                                    disk-image-size)))
-
-                (set-path-environment-variable "PATH" '("bin") native-inputs)
-
-                (load-in-linux-vm loader
-                                  #:output #$output
-                                  #:linux linux #:initrd initrd
-                                  #:qemu (qemu-command target)
-                                  #:memory-size #$memory-size
-                                  #:make-disk-image? #$make-disk-image?
-                                  #:single-file-output? #$single-file-output?
-                                  #:disk-image-format #$disk-image-format
-                                  #:disk-image-size size
-                                  #:references-graphs graphs))))))
-
-    (gexp->derivation name builder
-                      ;; TODO: Require the "kvm" feature.
-                      #:system system
-                      #:target #f             ;EXP is always executed natively
-                      #:env-vars env-vars
-                      #:guile-for-build guile-for-build
-                      #:references-graphs references-graphs
-                      #:substitutable? substitutable?)))
-
-(define (has-guix-service-type? os)
-  "Return true if OS contains a service of the type GUIX-SERVICE-TYPE."
-  (not (not (find (lambda (service)
-                     (eq? (service-kind service) guix-service-type))
-                   (operating-system-services os)))))
-
-(define* (qemu-image #:key
-                     (name "qemu-image")
-                     (system (%current-system))
-                     (target (%current-target-system))
-                     (qemu qemu-minimal)
-                     (disk-image-size 'guess)
-                     (disk-image-format "qcow2")
-                     (file-system-type "ext4")
-                     (file-system-options '())
-                     (device-nodes 'linux)
-                     (extra-directives '())
-                     file-system-label
-                     file-system-uuid
-                     os
-                     bootcfg-drv
-                     bootloader
-                     (register-closures? (has-guix-service-type? os))
-                     (inputs '())
-                     copy-inputs?
-                     (substitutable? #t))
-  "Return a bootable, stand-alone QEMU image of type DISK-IMAGE-FORMAT (e.g.,
-'qcow2' or 'raw'), with a root partition of type FILE-SYSTEM-TYPE.
-Optionally, FILE-SYSTEM-LABEL can be specified as the volume name for the root
-partition; likewise FILE-SYSTEM-UUID, if true, specifies the UUID of the root
-partition (a UUID object).  FILE-SYSTEM-OPTIONS is an optional list of
-command-line options passed to 'mkfs.ext4' (or similar).
-
-The returned image is a full disk image that runs OS-DERIVATION,
-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 is a list of inputs (as for packages).  When COPY-INPUTS? is true, copy
-all of INPUTS into the image being built.  When REGISTER-CLOSURES? is true,
-register INPUTS in the store database of the image so that Guix can be used in
-the image.  By default, REGISTER-CLOSURES? is set to true only if a service of
-type GUIX-SERVICE-TYPE is present in the services definition of the operating
-system.
-
-When DEVICE-NODES is 'linux, create Linux-device block and character devices
-under /dev.  When it is 'hurd, do Hurdish things.
-
-EXTRA-DIRECTIVES is an optional list of directives to populate the root file
-system that is passed to 'populate-root-file-system'."
-  (define schema
-    (and register-closures?
-         (local-file (search-path %load-path
-                                  "guix/store/schema.sql"))))
-
-  (define preserve-target
-    (if target
-        (lambda (obj)
-          (with-parameters ((%current-target-system target))
-            obj))
-        identity))
-
-  (define inputs*
-    (map (match-lambda
-           ((name thing)
-            `(,name ,(preserve-target thing)))
-           ((name thing output)
-            `(,name ,(preserve-target thing) ,output)))
-         inputs))
-
-  (expression->derivation-in-linux-vm
-   name
-   (with-extensions gcrypt-sqlite3&co
-     (with-imported-modules `(,@(source-module-closure '((gnu build vm)
-                                                         (gnu build bootloader)
-                                                         (gnu build hurd-boot)
-                                                         (guix store database)
-                                                         (guix build utils))
-                                                       #:select? not-config?)
-                              ((guix config) => ,(make-config.scm)))
-       #~(begin
-           (use-modules (gnu build bootloader)
-                        (gnu build vm)
-                        ((gnu build hurd-boot)
-                         #:select (make-hurd-device-nodes))
-                        ((gnu build linux-boot)
-                         #:select (make-essential-device-nodes))
-                        (guix store database)
-                        (guix build utils)
-                        (srfi srfi-26)
-                        (ice-9 binary-ports))
-
-           (sql-schema #$schema)
-
-           ;; Allow non-ASCII file names--e.g., 'nss-certs'--to be decoded.
-           (setenv "GUIX_LOCPATH"
-                   #+(file-append glibc-utf8-locales "/lib/locale"))
-           (setlocale LC_ALL "en_US.utf8")
-
-           (let ((inputs
-                  '#+(append (list parted e2fsprogs dosfstools)
-                             (map canonical-package
-                                  (list sed grep coreutils findutils gawk))))
-
-                 ;; This variable is unused but allows us to add INPUTS-TO-COPY
-                 ;; as inputs.
-                 (to-register
-                  '#$(map (match-lambda
-                            ((name thing) thing)
-                            ((name thing output) `(,thing ,output)))
-                          inputs*)))
-
-             (set-path-environment-variable "PATH" '("bin" "sbin") inputs)
-
-             (let* ((graphs     '#$(match inputs
-                                     (((names . _) ...)
-                                      names)))
-                    (initialize (root-partition-initializer
-                                 #:extra-directives '#$extra-directives
-                                 #:closures graphs
-                                 #:copy-closures? #$copy-inputs?
-                                 #:register-closures? #$register-closures?
-                                 #:system-directory #$(preserve-target os)
-
-                                 #:make-device-nodes
-                                 #$(match device-nodes
-                                     ('linux #~make-essential-device-nodes)
-                                     ('hurd #~make-hurd-device-nodes))
-
-                                 ;; Disable deduplication to speed things up,
-                                 ;; and because it doesn't help much for a
-                                 ;; single system generation.
-                                 #:deduplicate? #f))
-                    (root-size  #$(if (eq? 'guess disk-image-size)
-                                      #~(max
-                                         ;; Minimum 20 MiB root size
-                                         (* 20 (expt 2 20))
-                                         (estimated-partition-size
-                                          (map (cut string-append "/xchg/" <>)
-                                               graphs)))
-                                      (- disk-image-size
-                                         (* 50 (expt 2 20)))))
-                    (partitions
-                     (append
-                      (list (partition
-                             (size root-size)
-                             (label #$file-system-label)
-                             (uuid #$(and=> file-system-uuid
-                                            uuid-bytevector))
-                             (file-system #$file-system-type)
-                             (file-system-options '#$file-system-options)
-                             (flags '(boot))
-                             (initializer initialize)))
-                      ;; Append a small EFI System Partition for use with UEFI
-                      ;; bootloaders if we are not targeting ARM because UEFI
-                      ;; support in U-Boot is experimental.
-                      ;;
-                      ;; FIXME: ‘target-arm?’ may be not operate on the right
-                      ;; system/target values.  Rewrite using ‘let-system’ when
-                      ;; available.
-                      (if #$(target-arm?)
-                          '()
-                          (list (partition
-                                 ;; The standalone grub image is about 10MiB, but
-                                 ;; leave some room for custom or multiple images.
-                                 (size (* 40 (expt 2 20)))
-                                 (label "GNU-ESP") ;cosmetic only
-                                 ;; Use "vfat" here since this property is used
-                                 ;; when mounting. The actual FAT-ness is based
-                                 ;; on file system size (16 in this case).
-                                 (file-system "vfat")
-                                 (flags '(esp)))))))
-                    (grub-efi #$(and (not (target-arm?)) grub-efi)))
-               (initialize-hard-disk "/dev/vda"
-                                     #:partitions partitions
-                                     #:grub-efi grub-efi
-                                     #:bootloader-package
-                                     #+(bootloader-package bootloader)
-                                     #:bootcfg #$(preserve-target bootcfg-drv)
-                                     #:bootcfg-location
-                                     #$(bootloader-configuration-file bootloader)
-                                     #:bootloader-installer
-                                     #+(bootloader-installer bootloader)))))))
-   #:system system
-   #:make-disk-image? #t
-   #:disk-image-size disk-image-size
-   #:disk-image-format disk-image-format
-   #:references-graphs inputs*
-   #:substitutable? substitutable?))
-
-(define* (system-docker-image os
-                              #:key
-                              (name "guix-docker-image")
-                              (memory-size 256)
-                              (register-closures? (has-guix-service-type? os))
-                              shared-network?)
-  "Build a docker image.  OS is the desired <operating-system>.  NAME is the
-base name to use for the output file.  When SHARED-NETWORK? is true, assume
-that the container will share network with the host and thus doesn't need a
-DHCP client, nscd, and so on.
-
-When REGISTER-CLOSURES? is true, register the closure of OS with Guix in the
-resulting Docker image.  By default, REGISTER-CLOSURES? is set to true only if
-a service of type GUIX-SERVICE-TYPE is present in the services definition of
-the operating system."
-  (define schema
-    (and register-closures?
-         (local-file (search-path %load-path
-                                  "guix/store/schema.sql"))))
-
-  (define boot-program
-    ;; Program that runs the boot script of OS, which in turn starts shepherd.
-    (program-file "boot-program"
-                  #~(let ((system (cadr (command-line))))
-                      (setenv "GUIX_NEW_SYSTEM" system)
-                      (execl #$(file-append guile-3.0 "/bin/guile")
-                             "guile" "--no-auto-compile"
-                             (string-append system "/boot")))))
-
-
-  (let ((os    (operating-system-with-gc-roots
-                (containerized-operating-system os '()
-                                                #:shared-network?
-                                                shared-network?)
-                (list boot-program)))
-        (name  (string-append name ".tar.gz"))
-        (graph "system-graph"))
-    (define build
-      (with-extensions (cons guile-json-3         ;for (guix docker)
-                             gcrypt-sqlite3&co)   ;for (guix store database)
-        (with-imported-modules `(,@(source-module-closure
-                                    '((guix docker)
-                                      (guix store database)
-                                      (guix build utils)
-                                      (guix build store-copy)
-                                      (gnu build vm))
-                                    #:select? not-config?)
-                                 ((guix config) => ,(make-config.scm)))
-          #~(begin
-              (use-modules (guix docker)
-                           (guix build utils)
-                           (gnu build vm)
-                           (srfi srfi-19)
-                           (guix build store-copy)
-                           (guix store database))
-
-              ;; Set the SQL schema location.
-              (sql-schema #$schema)
-
-              ;; Allow non-ASCII file names--e.g., 'nss-certs'--to be decoded.
-              (setenv "GUIX_LOCPATH"
-                      #+(file-append glibc-utf8-locales "/lib/locale"))
-              (setlocale LC_ALL "en_US.utf8")
-
-              (let* (;; This initializer requires elevated privileges that are
-                     ;; not normally available in the build environment (e.g.,
-                     ;; it needs to create device nodes).  In order to obtain
-                     ;; such privileges, we run it as root in a VM.
-                     (initialize (root-partition-initializer
-                                  #:closures '(#$graph)
-                                  #:register-closures? #$register-closures?
-                                  #:system-directory #$os
-                                  ;; De-duplication would fail due to
-                                  ;; cross-device link errors, so don't do it.
-                                  #:deduplicate? #f))
-                     ;; Even as root in a VM, the initializer would fail due to
-                     ;; lack of privileges if we use a root-directory that is on
-                     ;; a file system that is shared with the host (e.g., /tmp).
-                     (root-directory "/guix-system-root"))
-                (set-path-environment-variable "PATH" '("bin" "sbin") '(#+tar))
-                (mkdir root-directory)
-                (initialize root-directory)
-                (build-docker-image
-                 (string-append "/xchg/" #$name) ;; The output file.
-                 (cons* root-directory
-                        (map store-info-item
-                             (call-with-input-file
-                                 (string-append "/xchg/" #$graph)
-                               read-reference-graph)))
-                 #$os
-                 #:entry-point '(#$boot-program #$os)
-                 #:compressor '(#+(file-append gzip "/bin/gzip") "-9n")
-                 #:creation-time (make-time time-utc 0 1)
-                 #:transformations `((,root-directory -> ""))))))))
-
-    (expression->derivation-in-linux-vm
-     name build
-     #:memory-size memory-size
-     #:make-disk-image? #f
-     #:single-file-output? #t
-     #:references-graphs `((,graph ,os)))))
-
 
 ;;;
 ;;; VMs that share file systems with the host.
@@ -655,46 +212,6 @@ environment with the store shared with the host.  MAPPINGS is a list of
                          (needed-for-boot? #t))
                        virtual-file-systems)))))
 
-(define* (system-qemu-image/shared-store
-          os
-          #:key
-          (system (%current-system))
-          (target (%current-target-system))
-          full-boot?
-          (disk-image-size (* (if full-boot? 500 30) (expt 2 20))))
-  "Return a derivation that builds a QEMU image of OS that shares its store
-with the host.
-
-When FULL-BOOT? is true, return an image that does a complete boot sequence,
-bootloaded included; thus, make a disk image that contains everything the
-bootloader refers to: OS kernel, initrd, bootloader data, etc."
-  (define root-uuid
-    ;; Use a fixed UUID to improve determinism.
-    (operating-system-uuid os 'dce))
-
-  (define bootcfg
-    (operating-system-bootcfg os))
-
-  ;; XXX: When FULL-BOOT? is true, we end up creating an image that contains
-  ;; BOOTCFG and all its dependencies, including the output of OS.
-  ;; This is more than needed (we only need the kernel, initrd, GRUB for its
-  ;; font, and the background image), but it's hard to filter that.
-  (qemu-image #:os os
-              #:system system
-              #:target target
-              #:bootcfg-drv bootcfg
-              #:bootloader (bootloader-configuration-bootloader
-                            (operating-system-bootloader os))
-              #:disk-image-size disk-image-size
-              #:file-system-uuid root-uuid
-              #:inputs (if full-boot?
-                           `(("bootcfg" ,bootcfg))
-                           '())
-
-              ;; XXX: Passing #t here is too slow, so let it off by default.
-              #:register-closures? #f
-              #:copy-inputs? full-boot?))
-
 (define* (common-qemu-options image shared-fs
                               #:key rw-image?)
   "Return the a string-value gexp with the common QEMU options to boot IMAGE,