Preview a GRUB 2.x theme using KVM/QEMU
Project description
About
grub2-theme-preview came into life when I was looking around for available GRUB 2.x themes and wanted a way to quickly see a theme in action without rebooting real hardware.
It takes a theme folder (or just a single picture),
creates a temporary bootable image using grub2-mkrescue
and launches
that image in a virtual machine using KVM/QEMU, all without root privileges.
(Showing theme gutsblack-archlinux)
Installation
To install the latest release from PyPI:
# pip install --user grub2-theme-preview
To install from a Git clone for development:
# pip install --user --editable .
Please make sure to install these non-PyPI dependencies as well:
grub-mkrescue
of GRUB 2 (packagegrub-common
on Debian and Ubuntu)- QEMU — hypervisor that performs hardware virtualization
- OVMF — EFI bios image for use with QEMU
- mtools — collection of utilities to access MS-DOS
xorriso
of libisoburn — frontend which enables creation and expansion of the ISO format
Usage
# grub2-theme-preview --help
usage: grub2-theme-preview [-h] [--image] [--grub-cfg PATH] [--verbose]
[--resolution WxH] [--timeout SECONDS] [--version]
[--grub2-mkrescue COMMAND] [--qemu COMMAND]
[--xorriso COMMAND] [--debug]
[--plain-rescue-image]
PATH
positional arguments:
PATH Path of theme directory (or image file) to preview
optional arguments:
-h, --help show this help message and exit
--image Preview a background image rather than a whole theme
--grub-cfg PATH Path of custom grub.cfg file to use (default:
/boot/grub{2,}/grub.cfg)
--verbose Increase verbosity
--resolution WxH Set a custom resolution, e.g. 800x600
--timeout SECONDS Set timeout in whole seconds or -1 to disable
(default: 30 seconds)
--version show program's version number and exit
command location arguments:
--grub2-mkrescue COMMAND
grub2-mkrescue command (default: grub-mkrescue)
--qemu COMMAND KVM/QEMU command (default: qemu-system-<machine>)
--xorriso COMMAND xorriso command (default: xorriso)
debugging arguments:
--debug Enable debugging output
--plain-rescue-image Use unprocessed GRUB rescue image with no theme
patched in; useful for checking if a plain GRUB rescue
image shows up a GRUB shell, successfully.
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