automatically put version in packets

src/client.rs

@@ -1,8 +1,8 @@
 use std::net::TcpStream;
 use std::io::{Read, Write, self};
+use clap::crate_version;
 
 pub struct Client {
-    version: String,
     stream: TcpStream,
 }
 
@@ -12,15 +12,13 @@ enum EchoType {
 }
 
 impl Client {
-    pub fn new(host: &str, port: u16, version: &str) -> Self {
+    pub fn new(host: &str, port: u16) -> Self {
         let connection_url = format!("{}:{}", host, port);
         let stream = TcpStream::connect(&connection_url)
             .expect(&format!("Failed to connect to {}", &connection_url));
-        let version = version.to_string();
 
         Client {
             stream,
-            version,
         }
     }
 
@@ -103,7 +101,8 @@ impl Client {
     }
 
     pub fn send(&mut self, command: &str, lines: Vec<&str>) -> io::Result<()> {
-        let version_line = format!("Rustis {}", self.version);
+        let version = crate_version!();
+        let version_line = format!("Rustis {}", version);
         let message = format!("{}\n{}\n{}\n\n", version_line, command, lines.join("\n"));
 
         let bytes = message.as_bytes();

src/main.rs

@@ -76,7 +76,7 @@ fn main() -> io::Result<()> {
         let host = matches.get_one::<String>("host").unwrap();
         let port = matches.get_one::<u16>("port").unwrap();
 
-        let mut client = client::Client::new(host, *port, "1.0.0");
+        let mut client = client::Client::new(host, *port);
 
         if let Some(matches) = matches.subcommand_matches("publish") {
             let channel = matches.get_one::<String>("channel").unwrap();

src/packetreader.rs

@@ -1,6 +1,5 @@
 use regex::Regex;
-
-const VERSION: &'static str = "1.0.0";
+use clap::crate_version;
 
 /* Packet format:
 
@@ -49,7 +48,7 @@ impl RequestPacket {
     pub fn new(buf: String) -> Self {
         let lines: Vec<_> = buf.split("\n").collect();
 
-        let version = if let Some(line1) = lines.get(0) {
+        let packet_version = if let Some(line1) = lines.get(0) {
             let re = Regex::new(r"^Rustis (\d{1,3}\.\d{1,4}\.\d{1,4})$").unwrap();
 
             if let Some(caps) = re.captures(line1) {
@@ -61,8 +60,10 @@ impl RequestPacket {
             None
         };
 
-        if let Some(version) = version {
-            if version != VERSION {
+        let current_version = crate_version!();
+
+        if let Some(packet_version) = packet_version {
+            if packet_version != current_version {
                 return RequestPacket::Invalid {
                     error: String::from("version mismatch"),
                 }
@@ -189,7 +190,8 @@ mod test {
     #[test]
     fn publish_packet() {
         let mut buf = String::new();
-        buf.push_str("Rustis 1.0.0\n");
+        let version = crate_version!();
+        buf.push_str(&format!("Rustis {}\n", version));
         buf.push_str("publish\n");
         buf.push_str("channel\n");
         buf.push_str("message");
@@ -205,7 +207,8 @@ mod test {
     #[test]
     fn invalid_version() {
         let mut buf = String::new();
-        buf.push_str("Rustis 99.99.99\n");
+        let version = "999.999.999";
+        buf.push_str(&format!("Rustis {}\n", version));
         buf.push_str("publish\n");
         buf.push_str("channel\n");
         buf.push_str("message\n");
@@ -221,7 +224,8 @@ mod test {
     #[test]
     fn unknown_command() {
         let mut buf = String::new();
-        buf.push_str("Rustis 1.0.0\n");
+        let version = crate_version!();
+        buf.push_str(&format!("Rustis {}\n", version));
         buf.push_str("heebee\n");
 
         let packet = RequestPacket::new(buf);