[model-gateway] add both python and rust cli alias (#13678)

sgl-router/src/main.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use clap::{ArgAction, Parser, ValueEnum};
+use clap::{ArgAction, Parser, Subcommand, ValueEnum};
 use sglang_router_rs::{
     config::{
         CircuitBreakerConfig, ConfigError, ConfigResult, DiscoveryConfig, HealthCheckConfig,
@@ -71,29 +71,31 @@ impl std::fmt::Display for Backend {
 }
 
 #[derive(Parser, Debug)]
-#[command(name = "sglang-router")]
-#[command(about = "SGLang Router - High-performance request distribution across worker nodes")]
+#[command(name = "sglang-router", alias = "smg", alias = "amg")]
+#[command(about = "SGLang Model Gateway - High-performance inference gateway")]
+#[command(args_conflicts_with_subcommands = true)]
 #[command(long_about = r#"
-SGLang Router - High-performance request distribution across worker nodes
+SGLang Model Gateway - Rust-based inference gateway
 
 Usage:
-This launcher enables starting a router with individual worker instances. It is useful for
-multi-node setups or when you want to start workers and router separately.
+  smg launch [OPTIONS]     Launch router (short command)
+  amg launch [OPTIONS]     Launch router (alternative)
+  sglang-router [OPTIONS]  Launch router (full name)
 
 Examples:
   # Regular mode
-  sglang-router --worker-urls http://worker1:8000 http://worker2:8000
+  smg launch --worker-urls http://worker1:8000 http://worker2:8000
 
-  # PD disaggregated mode with same policy for both
-  sglang-router --pd-disaggregation \
+  # PD disaggregated mode
+  smg launch --pd-disaggregation \
     --prefill http://127.0.0.1:30001 9001 \
     --prefill http://127.0.0.2:30002 9002 \
     --decode http://127.0.0.3:30003 \
     --decode http://127.0.0.4:30004 \
     --policy cache_aware
 
-  # PD mode with different policies for prefill and decode
-  sglang-router --pd-disaggregation \
+  # With different policies
+  smg launch --pd-disaggregation \
     --prefill http://127.0.0.1:30001 9001 \
     --prefill http://127.0.0.2:30002 \
     --decode http://127.0.0.3:30003 \
@@ -101,6 +103,25 @@ Examples:
     --prefill-policy cache_aware --decode-policy power_of_two
 
 "#)]
+struct Cli {
+    #[command(subcommand)]
+    command: Option<Commands>,
+
+    #[command(flatten)]
+    router_args: CliArgs,
+}
+
+#[derive(Subcommand, Debug)]
+enum Commands {
+    /// Launch the router (same as running without subcommand)
+    #[command(visible_alias = "start")]
+    Launch {
+        #[command(flatten)]
+        args: CliArgs,
+    },
+}
+
+#[derive(Parser, Debug)]
 struct CliArgs {
     #[arg(long, default_value = "0.0.0.0")]
     host: String,
@@ -683,7 +704,13 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         }
     }
 
-    let cli_args = CliArgs::parse_from(filtered_args);
+    let cli = Cli::parse_from(filtered_args);
+
+    // Handle subcommands or use direct args
+    let cli_args = match cli.command {
+        Some(Commands::Launch { args }) => args,
+        None => cli.router_args,
+    };
 
     println!("SGLang Router starting...");
     println!("Host: {}:{}", cli_args.host, cli_args.port);