vgimportclone: replace awk with dumpconfig to generate temporary lvm.conf for vgimportclone

With current dumpconfig, we can generate lvm.conf easily - we can merge
current lvm.conf with the config given on cmd line:
  lvm dumpconfig --mergedconfig --config "..."

This is a bit simpler than using awk and it also avoids problems when some of
the configuration is missing in existing lvm.conf file and hardcoded defaults
are used instead. The dumpconfig handles this transparently.

WHATS_NEW

@@ -1,5 +1,6 @@
 Version 2.02.115 -
 =====================================
+  Fix vgimportclone to properly override config if it is missing in lvm.conf.
   Fix automatic use of configure --enable-udev-systemd-background-jobs.
   Correctly rename active split LV with -splitmirrors for raid1.
   Add report/compact_output to lvm.conf to enable/disable compact report output.

scripts/vgimportclone.sh

@@ -242,17 +242,17 @@ export FILTER="filter=[ ${FILTER} \"r|.*|\" ]"
 
 LVMCONF=${TMP_LVM_SYSTEM_DIR}/lvm.conf
 
-# FIXME convert to cmdline override
-"$LVM" dumpconfig ${LVM_OPTS} | \
-"$AWK" -v DEV=${TMP_LVM_SYSTEM_DIR} -v CACHE=${TMP_LVM_SYSTEM_DIR}/.cache \
-    -v CACHE_DIR=${TMP_LVM_SYSTEM_DIR}/cache \
-    '/^[ \t]*filter[ \t]*=/{print ENVIRON["FILTER"];next} \
-     /^[ \t]*scan[ \t]*=/{print "scan = [ \"" DEV "\" ]";next} \
-     /^[ \t]*cache[ \t]*=/{print "cache = \"" CACHE "\"";next} \
-     /^[ \t]*use_lvmetad[ \t]*=/{print "use_lvmetad = 0";next} \
-     /^[ \t]*global_filter[ \t]*=/{print "global_filter = [ \"a|.*|\" ]";next} \
-     /^[ \t]*cache_dir[ \t]*=/{print "cache_dir = \"" CACHE_DIR "\"";next} \
-     {print $0}' > ${LVMCONF}
+CMD_CONFIG_LINE="devices { \
+                   scan = [ \"${TMP_LVM_SYSTEM_DIR}\" ] \
+                   cache_dir = \"$TMP_LVM_SYSTEM_DIR}/cache\"
+                   global_filter = [ \"a|.*|\" ] \
+                   ${FILTER}
+                 } \
+                 global { \
+                   use_lvmetad = 0 \
+                 }"
+
+$LVM dumpconfig ${LVM_OPTS} --file ${LVMCONF} --mergedconfig --config "${CMD_CONFIG_LINE}"
 
 checkvalue $? "Failed to generate ${LVMCONF}"
 # Only keep TMP_LVM_SYSTEM_DIR if it contains something worth keeping