adb-id.sh

# pass an int as the index of the wanted devices as first parameter
# i.e adb-id.sh 1
# pass -f so the text copied to clipboard will be pre-fixed with adb -s 
# It is possible to combine both parameters, i.e adb-id.sh 1 -f

IDS=$(adb devices | grep "[0-9]" | tr -s "\t " " " | cut -d " " -f 1)

# If $1 is a number we use it instead of reading.
re='^[0-9]+$'
if ! [[ $1 =~ $re ]] ; then
	COUNT=0
	for DEVICE in $IDS
	do
		echo "[$COUNT]" "$DEVICE" | tr -d '[:cntrl:]' 
		echo
		let COUNT+=1
	done
    read -r id
else
	id=$1
	shift
fi

COUNT=0
for DEVICE in $IDS
do
	if [[ "$COUNT" -eq "$id" ]]; then
		SELECTED="$DEVICE" 
	fi
	let COUNT+=1
done

if [[ $1 = "-f" ]]; then
	echo "adb -s $SELECTED" | tr -d '[:cntrl:]' | pbcopy
else
	echo $SELECTED | tr -d '[:cntrl:]' | pbcopy
fi