Show datetime; take port from an argument.

src/main.rs

@@ -2,14 +2,46 @@ use nmea::Nmea;
 use nmea::SentenceType;
 use std::thread;
 use std::time::Duration;
+use clap::Parser;
+use chrono::Local;
+
+/// Command-line arguments using Clap.
+#[derive(Parser, Debug)]
+#[command(author, version, about = "A tool for echoing latitude and longitude from a GPS USB dongle..")]
+struct Cli {
+    
+    /// COM port
+    #[arg(short = 'c', long)]
+    com: Option<String>,
+}
 
 fn main() {
+
+    let cli = Cli::parse();
+
+
+
+    let com = match cli.com {
+                            Some(com) => com,
+                            None =>  {
+                                    let ports = serialport::available_ports().expect("No ports found!");
+                                        println!("Avaiable Ports:");
+                                        for p in ports {
+                                            println!("{}", p.port_name);
+                                        }
+                                println!("\nMissing `-c` port argument, use one listed above.");
+                                return;
+                            } //todo!()
+                        } ;
+    println!("Reading from {com:?}");
+
     // Inifnite loop until I add controls
     while 1 == 1 {
         let mut nmea = Nmea::default();
 
         // Harcode port for dev
-        let port_name = "/dev/tty.usbmodem1301";
+        //let port_name = "/dev/tty.usbmodem1301";
+        let port_name = com.clone();
 
         // Thread for GPS streaming
         thread::spawn(move || {
@@ -26,7 +58,6 @@ fn main() {
                             let data = String::from_utf8_lossy(&buf[..n]);
 
                             for line in data.lines() {
-                                //println!("{}", line.to_string());
 
                                 // Check sentence type
                                 let sentence_type = match nmea.parse(line) {
@@ -38,10 +69,6 @@ fn main() {
 
                                 // Only keep the GLL sentences
                                 if sentence_type == SentenceType::GLL {
-                                    //nmea.parse(line).unwrap();
-                                    //println!("{:?}", nmea.latitude);
-                                    // if let Some(nmea.latitude) = x {
-                                    // println!("Matched {:?}!", x);
                                     let lat = match nmea.latitude {
                                         Some(lat) => lat,
                                         None => todo!()
@@ -50,19 +77,15 @@ fn main() {
                                         Some(lon) => lon,
                                         None => todo!()
                                     } ;
-                                    println!("{lat}, {lon}");
-                                // }
+                                    let date = Local::now();
+                                    println!("{}, {lat}, {lon}", date.format("%Y-%m-%d %H:%M:%S"));
+            
                                 }
-
-                                
-
-                               
                             }
                         }
                         Err(_) => break,
                     }
 
-                    thread::sleep(Duration::from_millis(200));
                 }
             }
         });