Calling "mknod" without root permissions fails. Plus those device nodes do not
appear to be needed to boot.
* gnu/build/image.scm (initialize-root-partition): Do not use
make-essential-device-nodes as default make-device-nodes procedure.
* gnu/build/image.scm (initialize-root-partition): Add bootloader-package and
bootloader-installer arguments. Run the bootloader-installer if defined.
* gnu/system/image.scm (system-disk-image): Adapt the partition initializer
call accordingly.
* gnu/build/image.scm (make-ext4-image): Rename to ...
(make-ext-image): ... it, and pass the file-system type to mke2fs,
(make-partition-image): Adapt to call "make-ext-image" if the partition
file-system is prefixed by "ext".
Raw disk-images and ISO9660 images are created in a Qemu virtual machine. This
is quite fragile, very slow, and almost unusable without KVM.
For all these reasons, add support for host image generation. This implies the
use new image generation mechanisms.
- Raw disk images: images of partitions are created using tools such as mke2fs
and mkdosfs depending on the partition file-system type. The partition
images are then assembled into a final image using genimage.
- ISO9660 images: the ISO root directory is populated within the store. GNU
xorriso is then called on that directory, in the exact same way as this is
done in (gnu build vm) module.
Those mechanisms are built upon the new (gnu image) module.
* gnu/image.scm: New file.
* gnu/system/image.scm: New file.
* gnu/build/image: New file.
* gnu/local.mk: Add them.
* gnu/system/vm.scm (system-disk-image): Rename to system-disk-image-in-vm.
* gnu/ci.scm (qemu-jobs): Adapt to new API.
* gnu/tests/install.scm (run-install): Ditto.
* guix/scripts/system.scm (system-derivation-for-action): Ditto.
