bash script for mac osx user creation commmands

check-user-exist-on-host.sh

function findCurrentOSType()
{
  osType=$(uname)
  case "$osType" in
    "Darwin")  
      echo "OS: MacOSX detected"
    ;;
    "Linux")
      echo "OS: Linux detected"
    ;;
    *) 
     {
       echo "Unsupported OS, exiting"
       exit
     } ;;
  esac
}

function check-user-exist-on-host {
    user=$1
    findCurrentOSType
    # create user jenkins and sonar on host machine
    if id "$user" >/dev/null 2>&1; then
      echo "INFO: user $user exists"
    else
      echo -e "ERROR: user user does not exist, please add it"
      case "$osType" in
        "Darwin")
        {
          echo -e "\tsudo dscl . -create /Users/$user"
          echo -e "\tsudo dscl . -create /Users/$user UserShell /bin/bash"
          echo -e "\tsudo dscl . -create /Users/$user RealName \"$user\""
          NEXTUID=$(dscl . -list /Users UniqueID | awk 'BEGIN{i=0}{if($2>i)i=$2}END{print i+1}')
          echo -e "\tsudo dscl . -create /Users/$user UniqueID $NEXTUID"
          NEXTGID=$(dscl . -list /Groups PrimaryGroupID | awk 'BEGIN{i=0}{if($2>i)i=$2}END{print i+1}')
          echo -e "\tsudo dscl . -create /Users/$user PrimaryGroupID $NEXTGID"
          echo -e "\tsudo dscl . -create /Users/luser NFSHomeDirectory /Users/$user"
          echo -e "\tsudo dscl . -passwd /Users/$user"
        } ;;
        "Linux")
        {
          echo -e "\tsudo useradd -u $user -g $user -d /home/$user $user"
          echo -e "\tsudo usermod -aG docker $user"
        } ;;
      esac          
      exit
    fi
}