Add --alias-file option (for packaging and systemd service)

Signed-off-by: Ivan Bushchik <ivabus@ivabus.dev>

Cargo.toml

@@ -1,10 +1,10 @@
 [package]
 name = "urouter"
-version = "0.2.1"
+version = "0.3.0"
 edition = "2021"
 license = "MIT"
 repository = "https://github.com/ivabus/urouter"
-description = "Small router for (kinda) short domains (fork of ivabus/aliurl for static routing)"
+description = "Small router for (kinda) short domains (fork of ivabus/aliurl without REST API)"
 
 
 [dependencies]
@@ -12,4 +12,5 @@ rocket = "0.5.0-rc.3"
 serde = { version = "1.0.163", features = ["derive"] }
 serde_json = "1.0.96"
 url-escape = "0.1.1"
-smurf = "0.3.0"
+smurf = "0.3.0"
+clap = { version = "4.4.11", features = ["derive"] }

README.md

@@ -1,6 +1,6 @@
 # urouter 
 
-Static (list of routes precompiled) http router for routing small domains.
+Static (list of routes read once) http router for routing small domains.
 
 ## Installation
 
@@ -9,7 +9,7 @@ git clone https://github.com/ivabus/urouter
 cd urouter
 ```
 
-Edit `alias.json` and `cargo run`
+Edit `alias.json` (or any other JSON file, check `--alias-file` option) and `cargo run`
 
 ## `alias.json` example
 

src/main.rs

@@ -35,10 +35,18 @@ use rocket::response::{Redirect, Responder};
 use rocket::Request;
 use serde::Deserialize;
 
-const _ALIAS: &'static str = include_str!("../alias.json");
+use clap::Parser;
+
 static mut ALIAS: OnceCell<Vec<Alias>> = OnceCell::new();
 
-#[derive(Deserialize, Clone)]
+#[derive(Parser, Debug)]
+#[command(about, author)]
+struct Args {
+	#[arg(short, long, default_value = "./alias.json")]
+	alias_file: PathBuf,
+}
+
+#[derive(Deserialize, Clone, Debug)]
 struct Alias {
 	uri: String,
 	alias: String,
@@ -112,8 +120,13 @@ async fn index(user_agent: UserAgent) -> Response {
 
 #[rocket::main]
 async fn main() -> Result<(), rocket::Error> {
+	let args = Args::parse();
 	unsafe {
-		ALIAS.set(serde_json::from_str(_ALIAS).unwrap()).unwrap_unchecked();
+		ALIAS
+			.set(
+				serde_json::from_str(&smurf::io::read_file_str(&args.alias_file).unwrap()).unwrap(),
+			)
+			.unwrap();
 	}
 	let _rocket = rocket::build().mount("/", routes![get_page, index]).launch().await?;
 	Ok(())