Allow changing binding port and address

src/main.rs

@@ -16,11 +16,11 @@ use serde::Deserialize;
 use serde_json::Value;
 use std::ffi::OsStr;
 use std::ffi::OsString;
+use std::net::ToSocketAddrs;
 use std::os::unix::prelude::OsStringExt;
 use std::path::PathBuf;
 use std::process::Stdio;
 use std::sync::Arc;
-use std::{net::SocketAddr, str::FromStr};
 use tokio::io::AsyncBufReadExt;
 use tokio::io::BufReader;
 use tokio::process::Command;
@@ -36,6 +36,24 @@ use tracing::info;
 
 #[derive(Parser)]
 struct Args {
+    #[clap(
+        short = 'p',
+        long = "port",
+        env = "PORT",
+        default_value = "8888",
+        help = "Listen port"
+    )]
+    listen_port: u16,
+
+    #[clap(
+        short = 'a',
+        long = "address",
+        env = "ADDRESS",
+        default_value = "127.0.0.1",
+        help = "Listen address"
+    )]
+    listen_address: String,
+
     #[arg(default_values = ["--all"])]
     doc_args: Vec<String>,
 }
@@ -47,6 +65,8 @@ async fn main() -> Result<()> {
         .with_writer(std::io::stderr)
         .init();
 
+    let args = Args::parse();
+
     info!("Getting standard docs path");
     let std_docs_path = get_std_docs_path().await?;
     info!("Found: {std_docs_path:?}");
@@ -81,10 +101,12 @@ async fn main() -> Result<()> {
         .route("/local", get(add_slash))
         .layer(TraceLayer::new_for_http().on_response(DefaultOnResponse::new().level(Level::INFO)));
 
-    let addr = SocketAddr::from_str("127.0.0.1:8888").unwrap();
-    info!("Listening on address http://{}", addr);
+    let socket_addrs =
+        ToSocketAddrs::to_socket_addrs(&(args.listen_address.as_str(), args.listen_port))?
+            .collect::<Vec<_>>();
+    info!("Trying to listen on {socket_addrs:?}");
 
-    axum::Server::bind(&addr)
+    axum::Server::bind(&socket_addrs[0])
         .serve(app.into_make_service())
         .await
         .map_err(Into::into)