made segment params optional and better prefix status

tmux/.tmux/segment.sh

@@ -1,26 +1,48 @@
 #!/bin/bash
 
+if [ -z "$1" ] ; then
+	printf "#[fg=white,bg=red]\ue0b2"
+	exit -1
+fi
+side=$1
 
-case $1 in
+if [ -n "$3" ] && [[ $3 =~ ^[0-9]+$ ]] ; then
+	# $3 was provided and is a number
+	from=$2
+	to=$3
+	shape=$4
+	echo "1"
+elif [ -z "$3" ] ; then
+	# $3 was null
+	to=$2
+	echo "2"
+else
+	# $3 was provided but not a number (assumed shape)
+	to=$2
+	shape=$3
+	echo "3"
+fi
+
+case $side in
 	start)
-	case $4 in
+	case $shape in
 		round)
 		separator="\ue0b6";;
 
 		sharp | *)
 		separator="\ue0b2";;
 	esac
-	echo -e "#[fg=colour$3,bg=colour$2]$separator#[fg=white,bg=colour$3]";;
+	echo -e "#[fg=colour$to,bg=colour$from]$separator#[fg=white,bg=colour$to]";;
 
 	end)
-	case $4 in
+	case $shape in
 		round)
 		separator="\ue0b4";;
 
 		sharp | *)
 		separator="\ue0b0";;
 	esac
-	echo -e "#[fg=colour$2,bg=colour$3]$separator#[fg=white]";;
+	echo -e "#[fg=colour$from,bg=colour$to]$separator#[fg=white]";;
 esac