Set device display name

Cargo.toml

@@ -26,6 +26,7 @@ clap = { version = "4.4.5", features = ["derive", "cargo", "wrap_help", "unicode
 config = "0.13.3"
 derive_deref = "1.1.1"
 directories = "5.0.1"
+hostname = "0.3.1"
 json5 = "0.4.1"
 serde = { version = "1.0.188", features = ["derive"] }
 serde_json = "1.0.107"

src/app.rs

@@ -43,6 +43,7 @@ impl App {
           .with_context(|| format!("Could not initialize client for {}", server_name))?;
         client
           .login_username(&conf.user_id, &conf.password)
+          .initial_device_display_name(&conf.device_name)
           .send()
           .await
           .with_context(|| format!("Could not login as {}", conf.user_id))?;

src/config.rs

@@ -25,6 +25,15 @@ pub struct AppConfig {
 pub struct AccountConfig {
   pub user_id: Box<matrix_sdk::ruma::UserId>,
   pub password: String,
+  #[serde(default = "default_device_name")]
+  pub device_name: String,
+}
+
+fn default_device_name() -> String {
+  match hostname::get() {
+    Ok(hostname) => format!("ratatrix on {}", hostname.to_string_lossy()),
+    Err(_) => format!("ratatrix"),
+  }
 }
 
 #[derive(Clone, Debug, Deserialize)]