Fixes insertion of modules into mkinitcpio.conf

Changes all sed lines for MODULES= to change only the line where
MODULES= is at the start of the line.
Changes nvidia drm, f2fs, and nvme sed MODULES= line modification to behave like
the recently modified xfs sed MODULES= line modification, such that it
will append to whatever is already in the modules list.

Author: UNIcodeX

lib/configure_system.sh

@@ -40,7 +40,7 @@ configure_system() {
 	fi
 
 	if "$drm" ; then
-		sed -i 's/MODULES=""/MODULES="nvidia nvidia_modeset nvidia_uvm nvidia_drm"/' "$ARCH"/etc/mkinitcpio.conf
+    sed -i '/^MODULES=/ s/.$/ nvidia nvidia_modeset nvidia_uvm nvidia_drm )/;s/" /"/'
 		sed -i 's!FILES=""!FILES="/etc/modprobe.d/nvidia.conf"!' "$ARCH"/etc/mkinitcpio.conf
 		echo "options nvidia_drm modeset=1" > "$ARCH"/etc/modprobe.d/nvidia.conf
 
@@ -63,7 +63,7 @@ configure_system() {
 	fi
 
 	if "$enable_f2fs" ; then
-		sed -i '/MODULES=/ s/.$/ f2fs crc32 libcrc32c crc32c_generic crc32c-intel crc32-pclmul"/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf
+		sed -i '/^MODULES=/ s/.$/ f2fs crc32 libcrc32c crc32c_generic crc32c-intel crc32-pclmul )/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf
 		if ! "$crypted" ; then
 			arch-chroot "$ARCH" mkinitcpio -p "$kernel" &>/dev/null &
 			pid=$! pri=1 msg="\n$f2fs_config_load \n\n \Z1> \Z2mkinitcpio -p $kernel\Zn" load
@@ -72,7 +72,7 @@ configure_system() {
 	fi
 
   if "$enable_xfs" ; then
-		sed -i '/MODULES=/ s/.$/ xfs )/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf
+		sed -i '/^MODULES=/ s/.$/ xfs )/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf
 		if ! "$crypted" ; then
 			arch-chroot "$ARCH" mkinitcpio -p "$kernel" &>/dev/null &
 			pid=$! pri=1 msg="\n$xfs_config_load \n\n \Z1> \Z2mkinitcpio -p $kernel\Zn" load
@@ -81,7 +81,7 @@ configure_system() {
 	fi
 
 	if (<<<"$BOOT" egrep "nvme.*" &> /dev/null) then
-		sed -i 's/MODULES="/MODULES="nvme /;s/ "/"/' "$ARCH"/etc/mkinitcpio.conf
+		sed -i '/^MODULES=/ s/.$/ nvme )/;s/" /"/' "$ARCH"/etc/mkinitcpio.conf
 		if ! "$crypted" ; then
 			arch-chroot "$ARCH" mkinitcpio -p "$kernel" &>/dev/null &
 			pid=$! pri=1 msg="\n$kernel_config_load \n\n \Z1> \Z2mkinitcpio -p $kernel\Zn" load