[Unit]
Description=Snapshot bootfs just before it is mounted
Requisite=zfs-import.target
After=zfs-import.target
Before=dracut-mount.service
DefaultDependencies=no
ConditionKernelCommandLine=bootfs.snapshot

[Service]
# ${BOOTFS} should have been set by zfs-env-bootfs.service
Type=oneshot
ExecStartPre=/bin/sh -c 'test -n "${BOOTFS}"'
ExecStart=-/bin/sh -c '. /lib/dracut-lib.sh; SNAPNAME="$(getarg bootfs.snapshot)"; /sbin/zfs snapshot "${BOOTFS}@${SNAPNAME:-%v}"'
RemainAfterExit=yes