Implement the headless SSH server

crates/bds-server/src/main.rs

@@ -0,0 +1,41 @@
+use std::net::IpAddr;
+use std::path::PathBuf;
+
+use bds_server::boot::BootMode;
+use clap::Parser;
+
+#[derive(Debug, Parser)]
+#[command(
+    name = "bds-server",
+    about = "Headless RuDS engine host over authenticated SSH"
+)]
+struct Args {
+    /// SSH listen address. Defaults to loopback; external access must be explicit.
+    #[arg(long)]
+    bind: Option<IpAddr>,
+    /// SSH listen port.
+    #[arg(long)]
+    port: Option<u16>,
+    /// Application database path.
+    #[arg(long)]
+    database: Option<PathBuf>,
+    /// Private application data directory containing SSH key material.
+    #[arg(long)]
+    data_dir: Option<PathBuf>,
+}
+
+fn main() -> anyhow::Result<()> {
+    let args = Args::parse();
+    let data_root = args
+        .data_dir
+        .unwrap_or_else(bds_core::util::application_data_dir);
+    let database_path = args.database.unwrap_or_else(|| data_root.join("bds.db"));
+    let mut config = bds_server::ServerConfig::from_environment(database_path, data_root)?;
+    if let Some(bind) = args.bind {
+        config.bind = bind;
+    }
+    if let Some(port) = args.port {
+        config.port = port;
+    }
+    bds_server::run_headless(BootMode::Server, config)
+}