feat(hwdb): install hwdb on demand when module is needed

dracut.sh

@@ -1302,6 +1302,12 @@ if ! [[ -d "$udevdir" ]]; then
  [[ -e /usr/lib/udev/collect ]] && udevdir=/usr/lib/udev
 fi
 
+[[ -d $udevconfdir ]] \
+ || udevconfdir="$(pkg-config udev --variable=udevconfdir 2>/dev/null)"
+if ! [[ -d "$udevconfdir" ]]; then
+ [[ -d /etc/udev ]] && udevconfdir=/etc/udev
+fi
+
 [[ -d $systemdutildir ]] \
  || systemdutildir=$(pkg-config systemd --variable=systemdutildir 2>/dev/null)
 

dracut.spec

@@ -365,6 +365,7 @@ echo 'dracut_rescue_image="yes"' > $RPM_BUILD_ROOT%{dracutlibdir}/dracut.conf.d/
 %{dracutlibdir}/modules.d/91crypt-loop
 %{dracutlibdir}/modules.d/95debug
 %{dracutlibdir}/modules.d/95fstab-sys
+%{dracutlibdir}/modules.d/95hwdb
 %{dracutlibdir}/modules.d/95lunmask
 %{dracutlibdir}/modules.d/95nvmf
 %{dracutlibdir}/modules.d/95resume

modules.d/95hwdb/module-setup.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+# This file is part of dracut.
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+check() {
+ return 255
+}
+
+# called by dracut
+install() {
+ local hwdb_bin
+
+ # systemd-hwdb ships the file in /etc, with /usr/lib as an alternative.
+ # Therefore consider this location as preferred for configuration.
+ hwdb_bin="${udevdir}"/hwdb.bin
+
+ if [[ ! -r "${hwdb_bin}" ]]; then
+ hwdb_bin="${udevconfdir}"/hwdb.bin
+ fi
+
+ if [[ $hostonly ]]; then
+ inst_multiple -H "${hwdb_bin}"
+ else
+ inst_multiple "${hwdb_bin}"
+ fi
+}