New warewulf-dracut subpackage

warewulf-dracut includes a dracut module to be installed in a container
image to support building an initramfs that can boot from Warewulf.

Signed-off-by: Jonathon Anderson <janderson@ciq.com>

dracut/modules.d/90wwinit/parse-wwinit.sh

@@ -0,0 +1,28 @@
+#!/bin/sh
+# root=wwinit
+
+[ -z "$root" ] && root=$(getarg root=)
+
+if [ "${root}" = "wwinit" ]
+then
+    info "root=${root}"
+    export wwinit_container=$(getarg wwinit.container=); info "wwinit.container=${wwinit_container}"
+    export wwinit_system=$(getarg wwinit.system=); info "wwinit.system=${wwinit_system}"
+    export wwinit_runtime=$(getarg wwinit.runtime=); info "wwinit.runtime=${wwinit_runtime}"
+    export wwinit_kmods=$(getarg wwinit.kmods=); info "wwinit.kmods=${wwinit_kmods}"
+
+    wwinit_tmpfs_size=$(getarg wwinit.tmpfs.size=)
+    if [ -n "$wwinit_tmpfs_size" ]
+    then
+        info "wwinit.tmpfs.size=${wwinit_tmpfs_size}"
+        export wwinit_tmpfs_size_option="-o size=${wwinit_tmpfs_size}"
+    fi
+
+    if [ -n "${wwinit_container}" ]
+    then
+        info "Found root=${root} and a Warewulf container image. Will boot from Warewulf."
+        rootok=1
+    else
+        die "Found root=${root} but no container image. Cannot boot from Warewulf."
+    fi
+fi