Merge "Add better error message to build from bluetooth_packetgen" am: 7cb24c7e am: 53aab24b

//  limitations under the License.

use std::env;

use std::path::PathBuf;

use std::path::{Path, PathBuf};

use std::process::Command;

fn main() {

    let outputted = [out_dir.join("../../hci/hci_packets.rs")];

    // Find the packetgen tool. Expecting it at CARGO_HOME/bin

    let packetgen =

        PathBuf::from(env::var("CARGO_HOME").unwrap()).join("bin").join("bluetooth_packetgen");

    let packetgen = match env::var("CARGO_HOME") {

        Ok(dir) => PathBuf::from(dir).join("bin").join("bluetooth_packetgen"),

        Err(_) => PathBuf::from("bluetooth_packetgen"),

    };

    if !Path::new(packetgen.as_os_str()).exists() {

        panic!("Unable to locate bluetooth packet generator:{:?}", packetgen.as_os_str().to_str().unwrap());

    }

    for i in 0..input_files.len() {

        let output = Command::new(packetgen.as_os_str().to_str().unwrap())