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assemblers/qcow2: don't rely on partition loopback devices

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Create a loopback device for the raw partiton, rather than relying on
the partition devices the kernel puts in /dev. This requires us to
specify the part_msdos module directly as grub2-install now seems
unable to detect the partition table type.

Signed-off-by: Tom Gundersen <teg@jklm.no>
This commit is contained in:
Tom Gundersen 2019-07-18 19:45:02 +02:00 • committed by Lars Karlitski
parent 18ebce3016
commit 40dfee9855
1 changed files with 4 additions and 3 deletions
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7
assemblers/io.weldr.qcow2
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@ -72,11 +72,12 @@ def main(tree, output_dir, options):
f"{int(partition_size / 1024)}k"], input="y", encoding='utf-8', check=True)
# Mount the created image as a loopback device
with loop_device(image, size) as loop, \
mount(f"{loop}p1", mountpoint):
with loop_device(image, partition_offset) as loop_block, \
loop_device(image, partition_size, partition_offset) as loop_part, \
mount(loop_part, mountpoint):
# Install grub2 into the boot sector of the image, and copy the grub2 imagise into /boot/grub2
with mount_api(mountpoint):
subprocess.run(["chroot", mountpoint, "grub2-install", "--no-floppy", "--target", "i386-pc", loop],
subprocess.run(["chroot", mountpoint, "grub2-install", "--no-floppy", "--modules=part_msdos", "--target=i386-pc", loop_block],
check=True)
subprocess.run(["qemu-img", "convert", "-O", "qcow2", "-c", image, f"{output_dir}/{filename}"], check=True)