/usr/lib/udev is hardcoded

[vozhyk-]

When I run generate-zbm on Gentoo (openrc, USE=split-usr in case that makes a difference), I get:

# generate-zbm
Mounting /boot/efi
Creating ZFSBootMenu 1.8.1 from kernel /boot/vmlinuz-5.4.51-gentoo-x86_64
dracut-install: ERROR: installing '/usr/lib/udev/vdev_id'
dracut: FAILED: /usr/lib/dracut/dracut-install -D /var/tmp/dracut.djkjGC/initramfs -a /usr/lib/udev/vdev_id
dracut: failed to install essential executable '/usr/lib/udev/vdev_id'
Failed to create /tmp/mo7y7dzWV3/zfsbootmenu.efi
Unmounting /boot/efi

I see that /usr/lib/udev is hardcoded in https://github.com/zbm-dev/zfsbootmenu/blob/ac8a8edafbbcd8e22013de676982edcd590445d9/90zfsbootmenu/module-setup.sh . If I change every /usr/lib/udev to /lib/udev, the problem goes away.

[zdykstra]

Thank you for opening this issue. I'll get a more permanent fix for you to test later today.

[ahesford]

Upstream ZFS uses some placeholder strings and replaces them on install, that's probably a good approach here too.

[vozhyk-]

Looks like genkernel (which I use for the BE's initramfs) finds the directory using pkg-config: https://github.com/gentoo/genkernel/blob/369cfa98f72675a285ec98439e9054ab57b234c9/gen_funcs.sh#L1142