✨ feat: custom hostname

easytier/src/easytier-core.rs

@@ -111,6 +111,9 @@ struct Cli {
     #[arg(long, help = "directory to store log files")]
     file_log_dir: Option<String>,
 
+    #[arg(long, help = "host name to identify this device")]
+    hostname: Option<String>,
+
     #[arg(
         short = 'm',
         long,
@@ -177,6 +180,26 @@ impl From<Cli> for TomlConfigLoader {
         let cfg = TomlConfigLoader::default();
 
         cfg.set_inst_name(cli.instance_name.clone());
+
+        let hostname = gethostname::gethostname().to_string_lossy().to_string();
+        let hostname = match cli.hostname {
+            Some(name) => {
+                // when allowing custom hostname, there may be empty
+                if name.is_empty() {
+                    hostname
+                } else {
+                    name
+                }
+            }
+            None => hostname,
+        };
+        let re = regex::Regex::new(r"[^\u4E00-\u9FA5a-zA-Z0-9\-]*").unwrap();
+        let mut hostname = re.replace_all(&hostname, "").to_string();
+        if hostname.len() > 32 {
+            hostname = hostname.chars().take(32).collect::<String>();
+        }
+        cfg.set_hostname(Some(hostname));
+
         cfg.set_network_identity(NetworkIdentity::new(
             cli.network_name.clone(),
             cli.network_secret.clone(),