From 9f10cce8e4f1966f0e11273f7f265a8936106b02 Mon Sep 17 00:00:00 2001
From: natemaia <natemaia10@gmail.com>
Date: Sun, 27 Oct 2019 14:13:56 -0700
Subject: [PATCH] Fix: negative index error on empty string

---
 archlabs-installer | 44 +++++++++++++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 17 deletions(-)

diff --git a/archlabs-installer b/archlabs-installer
index db36fd2..8077f6c 100755
--- a/archlabs-installer
+++ b/archlabs-installer
@@ -929,12 +929,14 @@ select_swap()
 {
 	local pts dev size isize
 
-	while read -r dev size; do  # walk partition list and skip ones that are too small/big for swap
-		size_t="${size: -1:1}"
-		isize=${size:0:-1}
-		isize=${isize%.*}
-		[[ $size_t =~ [KT] || ($size_t == 'G' && $isize -gt 16) || ($size_t == 'M' && $isize -lt 100) ]] || pts+="$dev $size "
-	done <<< "$PARTS"
+	if (( COUNT )) ; then
+		while read -r dev size; do  # walk partition list and skip ones that are too small/big for swap
+			size_t="${size: -1:1}"
+			isize=${size:0:-1}
+			isize=${isize%.*}
+			[[ $size_t =~ [KT] || ($size_t == 'G' && $isize -gt 16) || ($size_t == 'M' && $isize -lt 100) ]] || pts+="$dev $size "
+		done <<< "$PARTS"
+	fi
 
 	dlg SWAP_PART menu "Swap Setup" "\nSelect whether to use a swapfile, swap partition, or none." \
 		"none" "Don't allocate any swap space" \
@@ -1027,12 +1029,14 @@ select_boot_partition()
 			BOOT_PART="$AUTO_BOOT_PART"
 			return 0
 		else
-			while read -r dev size; do  # walk partition list and skip ones that are too small/big for boot
-				size_t="${size: -1:1}"
-				isize=${size:0:-1}
-				isize=${isize%.*}
-				[[ $size_t =~ [KT] || ($size_t == 'G' && $isize -gt 2) || ($size_t == 'M' && $isize -lt 100) ]] || { pts+="$dev $size "; (( ptcount++ )); }
-			done <<< "$PARTS"
+			if (( COUNT )); then
+				while read -r dev size; do  # walk partition list and skip ones that are too small/big for boot
+					size_t="${size: -1:1}"
+					isize=${size:0:-1}
+					isize=${isize%.*}
+					[[ $size_t =~ [KT] || ($size_t == 'G' && $isize -gt 2) || ($size_t == 'M' && $isize -lt 100) ]] || { pts+="$dev $size "; (( ptcount++ )); }
+				done <<< "$PARTS"
+			fi
 
 			case "$SYS" in
 				UEFI)
@@ -1044,11 +1048,15 @@ select_boot_partition()
 					[[ $BOOT_PART ]] || return 1
 					;;
 				BIOS)
-					(( ptcount == 0 )) && return 0
 					if [[ $LUKS && ! $LVM ]]; then
-						dlg BOOT_PART menu "Boot Partition" "$_biosluks" $pts
+						case "$ptcount" in
+							0) msg "Boot Partition" "\nLUKS without LVM requires a separate boot partition.\nNo partitions available that meet size requirements!!\n\nReturning to the main menu.\n" 2; return 1 ;;
+							1) msg "Boot Partition" "\nOnly one partition available that meets size requirements.\n" 1; BOOT_PART="$(awk 'NF > 0 {print $1}' <<< "$pts")" ;;
+							*) dlg BOOT_PART menu "Boot Partition" "$_biosluks" $pts ;;
+						esac
 						[[ $BOOT_PART ]] || return 1
 					else
+						(( ptcount == 0 )) && return 0
 						dlg BOOT_PART menu "Boot Partition" "$_bios" "skip" "no separate boot" $pts
 						[[ -z $BOOT_PART || $BOOT_PART == "skip" ]] && { BOOT_PART=''; return 0; }
 					fi
@@ -1108,9 +1116,11 @@ select_extra_partitions()
 	local part dev size
 
 	# walk partition list and skip ones that are too small to be usable
-	while read -r dev size; do
-		[[ ${size: -1:1} =~ [KM] ]] && part_countdec "$dev"
-	done <<< "$PARTS"
+	if (( COUNT )); then
+		while read -r dev size; do
+			[[ ${size: -1:1} =~ [KM] ]] && part_countdec "$dev"
+		done <<< "$PARTS"
+	fi
 
 	while (( COUNT > 0 )); do
 		part=''