FaceTime from command line.

facetime_cli.swift

#!/usr/bin/env swift

//swiftc facetime_cli.swift -o facetime_cli
// sudo cp facetime_cli /usr/bin
// Enjoy! usage: facetime_cli $PHONE_NUMBER or $APPLE_ID

import Foundation
import Cocoa

extension Array {
    func safeObjectAt(index: Int) -> Element? {
        if index < self.count {
            return self[index]
        }
        else {
            return nil
        }
    }
}

if let address = Process.arguments.safeObjectAt(1) where address.characters.count > 0 {
    let url: String = "tel://\(address)"
    print("Calling \(address)...")
    NSWorkspace.sharedWorkspace().openURL(NSURL(string: url)!)
} else {
    print("Please supply an address to call")
}

Successfully built it with xcrun -sdk macosx swiftc facetime_cli.swift -o facetime_cli