Inspired by
1270b2e209.
The price to pay is about 5% of a CPU core usage in the guest in the worst
scenario.
* gnu/system/examples/vm-image.tmpl
(auto-update-resolution-crutch): New mcron job.
[services]: Extend the mcron-service with it.
This example is broken since commit
99c45877a9 (wrong file name passed to
'local-file'), and its functionality is superseded by the upcoming
'provenance-service-type'.
* gnu/system/examples/vm-image.tmpl (this-file): Remove.
<services>: Remove 'config-file service.
* doc/guix.texi (Running Guix in a VM): Remove mentions of 'lsh-server';
mention 'openssh-service-type' and add a cross-reference.
* gnu/system/examples/vm-image.tmpl (services): Add a commented-out line
for 'openssh-service-type'.
* gnu/system/examples/bare-bones.tmpl (services): Do it.
* gnu/system/examples/beaglebone.tmpl (packages): Do it.
(services): Do it.
* gnu/system/examples/desktop.tmpl (packages): Do it.
(services): Do it.
* gnu/system/examples/lightweight-desktop.tmpl (file-systems): Do it.
(packages): Do it.
* gnu/system/examples/vm-image.tmpl (packages): Do it.
The 'title' field was easily overlooked and was an endless source of
confusion. Now, the value of the 'device' field is self-contained.
* gnu/system/file-systems.scm (<file-system>): Change constructor name
to '%file-system'.
[title]: Remove.
(<file-system-label>): New record type with printer.
(report-deprecation, device-expression)
(process-file-system-declaration, file-system): New macros.
(file-system-title): New procedure.
(file-system->spec, spec->file-system): Adjust to handle
<file-system-label>.
* gnu/system.scm (bootable-kernel-arguments): Add case for
'file-system-label?'.
(read-boot-parameters): Likewise.
(mapped-device-user): Avoid 'file-system-title'.
(fs->boot-device): Remove.
(operating-system-boot-parameters): Use 'file-system-device' instead of
'fs->boot-device'.
(device->sexp): Add case for 'file-system-label?'.
* gnu/bootloader/grub.scm (grub-root-search): Add case for
'file-system-label?'.
* gnu/system/examples/bare-bones.tmpl,
gnu/system/examples/beaglebone-black.tmpl,
gnu/system/examples/lightweight-desktop.tmpl,
gnu/system/examples/vm-image.tmpl: Remove uses of 'title'.
* gnu/system/vm.scm (virtualized-operating-system): Remove uses of
'file-system-title'.
* guix/scripts/system.scm (check-file-system-availability): Likewise,
and adjust fix-it hint.
(check-initrd-modules)[file-system-/dev]: Likewise.
* gnu/build/file-systems.scm (canonicalize-device-spec): Remove 'title'
parameter.
[canonical-title]: Remove.
Match on SPEC's type rather than on CANONICAL-TITLE.
(mount-file-system): Adjust caller.
* gnu/build/linux-boot.scm (boot-system): Interpret ROOT here.
* gnu/services/base.scm (file-system->fstab-entry): Remove use of
'file-system-title'.
* doc/guix.texi (File Systems): Remove documentation of the 'title'
field. Rewrite documentation of 'device' and document
'file-system-label'.
* gnu/bootloader.scm (<bootloader-configuration>): Deprecate "device" field in
favor of "target" field. This is mostly a renaming but also a generalization
to support UEFI targets being paths to a mounted partition instead of a device
name.
* gnu/system/examples/bare-bones.tmpl:
* gnu/system/examples/desktop.tmpl:
* gnu/system/examples/lightweight-desktop.tmpl:
* gnu/system/examples/vm-image.tmpl:
* gnu/system/install.scm:
* gnu/tests.scm:
* gnu/tests/install.scm:
* gnu/tests/nfs.scm:
* tests/system.scm: Adapt all invocations of bootloader-configuration.
* guix/scripts/system.scm (perform-action): Rename device argument to
bootloader-target.
(process-action): Adapt caller.
* doc/guix.texi (Proceeding with the Installation):
* doc/guix.texi (Bootloader Configuration): Update documentation.
* gnu/system/examples/vm-image.tmpl: New file.
* Makefile.am (GUIXSD_VM_SYSTEMS, GUIXSD_VM_IMAGE_BASE,
GUIXSD_VM_IMAGE_SIZE): New variables.
(release): Add logic to build a VM image.
(EXAMPLES): Add 'gnu/system/examples/vm-image.tmpl'.
* doc/guix.texi (Running GuixSD in a VM, Installing GuixSD in a VM): Mention the
pre-built VM image.
