made backend database url configurable through cli

Cargo.lock

@@ -257,7 +257,7 @@ checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
 
 [[package]]
 name = "chatapp"
-version = "0.1.0"
+version = "0.2.0"
 dependencies = [
  "anyhow",
  "argon2",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "chatapp"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2024"
 
 [dependencies]

flake.nix

@@ -17,7 +17,7 @@
       in {
         packages.default = pkgs.rustPlatform.buildRustPackage {
           pname = "chatapp";
-          version = "0.1.0";
+          version = "0.2.0";
 
           # Point to the backend subdirectory
           src = ./backend;

src/db.rs

@@ -2,9 +2,9 @@ use axum::http::StatusCode;
 use sqlx::PgPool;
 use uuid::Uuid;
 
-pub async fn init_db() -> Result<PgPool, sqlx::Error> {
+pub async fn init_db(url: String) -> Result<PgPool, sqlx::Error> {
-    let database_url = "postgres://chatapp:secret@localhost:5432/chatapp";
+    let database_url = format!("postgres://chatapp:secret@{url}/chatapp");
-    PgPool::connect(database_url).await
+    PgPool::connect(database_url.as_str()).await
 }
 
 pub async fn user_id_from_uuid(db: &PgPool, user_uuid: Uuid) -> Result<i32, (StatusCode, String)> {

src/main.rs

@@ -29,6 +29,10 @@ pub struct Cli {
     #[arg(short, long, default_value = "8080")]
     port: String,
 
+    /// Database URL
+    #[arg(short, long, default_value = "localhost:5432")]
+    database: String,
+
     /// Verbose mode
     #[arg(short, long)]
     verbose: bool,
@@ -43,7 +47,7 @@ async fn main() -> anyhow::Result<()> {
         .init();
 
     tracing::info!("Connecting to database...");
-    let db_pool = db::init_db().await?;
+    let db_pool = db::init_db(cli.database).await?;
 
     let cors = CorsLayer::new()
         .allow_origin(Any)