Support Fedora CoreOS (#1727)

IMG/cpio/ventoy/hook/rhel7/ventoy-hook.sh

@@ -128,6 +128,12 @@ if [ -e /usr/sbin/anaconda-diskroot ]; then
     $SED  's/^mount $dev $repodir/mount -oro $dev $repodir/' -i /usr/sbin/anaconda-diskroot
 fi
 
+#For Fedora CoreOS
+if $GREP -i -q 'fedora.*coreos' /etc/os-release; then
+    $SED "s#isosrc=.*#isosrc=/dev/mapper/ventoy#" -i /lib/systemd/system-generators/live-generator
+    cp -a $VTOY_PATH/hook/rhel7/ventoy-make-link.sh /lib/dracut/hooks/pre-mount/99-ventoy-premount-mklink.sh
+fi
+
 if [ -f $VTOY_PATH/autoinstall ]; then
     cp -a $VTOY_PATH/hook/rhel7/ventoy-autoexp.sh /lib/dracut/hooks/pre-mount/99-ventoy-autoexp.sh
 fi

INSTALL/grub/grub.cfg

@@ -381,7 +381,9 @@ function distro_specify_initrd_file_phase2 {
         vt_linux_specify_initrd_file /sysresccd/boot/i686/sysresccd.img
     elif [ -f (loop)/boot/full.cz ]; then
         vt_linux_specify_initrd_file /boot/full.cz
-    
+    elif [ -f (loop)/images/pxeboot/initrd.img ]; then
+        vt_linux_specify_initrd_file /images/pxeboot/initrd.img
+
     fi
 }