Found this floating around out there; may not be needed any longer...
###----------------------------------------------------------------------------
### Install the Xcode CLI Tools
### UPDATE: this will get installed as a dependency to Homebrew
### FIXME: https://github.com/todd-dsm/mac-ops/issues/33
###----------------------------------------------------------------------------
echo "Watch for on-screen prompts about sshd-keygen-wrapper: Accept"
xcode-select --install
sleep 10
osascript <<EOD
tell application "System Events"
tell process "Install Command Line Developer Tools"
keystroke return
click button "Agree" of window "License Agreement"
end tell
end tell
EOD
Found this floating around out there; may not be needed any longer...