get the first attached device from the `adb devices -l` list

dev1.sh

#!/usr/bin/env bash
#Lerie Taylor
#get the first device
first_dev=$(adb devices|head -n2|tail -1|sed -r 's/(.+)\t.+/\1/g')

if [ -z "$first_dev" ]
then
        echo "No devices found"
        exit 0
fi

echo $first_dev