Install Xcode Command Line Tools from the command line

installXcodeCommandLineTools.sh

#!/bin/bash

# create file to prompt 'softwareupdate' utility to see command line tools as available
/usr/bin/touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress

# check for command line tools in available software updates
toInstall=softwareupdate -l | grep -B 1 -E "Command Line (Developer|Tools)" | awk -F"*" '/^ +\\*/ {print $2}' | sed 's/^ *//' | tail -n1

# install this specific software update
/usr/sbin/softwareupdate -i "$toInstall"

# remove temporary file
/bin/rm /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress

# configure command line tools installation
/usr/bin/xcode-select --switch /Library/Developer/CommandLineTools

exit 0