Config, and loading at startup

Cargo.lock

@@ -38,12 +38,27 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "base64"
+version = "0.21.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "bytes"
 version = "1.5.0"
@@ -69,6 +84,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 name = "chorus"
 version = "0.1.0"
 dependencies = [
+ "ron",
  "serde",
  "thiserror",
  "tokio",
@@ -200,7 +216,19 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4722d768eff46b75989dd134e5c353f0d6296e5aaa3132e776cbdb56be7731aa"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
+]
+
+[[package]]
+name = "ron"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b91f7eff05f748767f183df4320a63d6936e9c6107d97c9e6bdd9784f4289c94"
+dependencies = [
+ "base64",
+ "bitflags 2.4.1",
+ "serde",
+ "serde_derive",
 ]
 
 [[package]]

Cargo.toml

@@ -8,6 +8,7 @@ repository = "https://github.com/mikedilger/chorus"
 edition = "2021"
 
 [dependencies]
+ron = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 thiserror = "1.0"
 tokio = { version = "1", features = [ "full" ] }

sample/sample.config.ron

@@ -0,0 +1,4 @@
+Config(
+    ip_address: "127.0.0.1",
+    port: 8080,
+)

src/config.rs

@@ -0,0 +1,16 @@
+use serde::{Deserialize, Serialize};
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Config {
+    pub ip_address: String,
+    pub port: u16,
+}
+
+impl Default for Config {
+    fn default() -> Config {
+        Config {
+            ip_address: "127.0.0.1".to_string(),
+            port: 80,
+        }
+    }
+}

src/error.rs

@@ -3,6 +3,10 @@ use thiserror::Error;
 /// Errors that can occur in the chorus crate
 #[derive(Error, Debug)]
 pub enum Error {
+    // Config
+    #[error("Config: {0}")]
+    Config(#[from] ron::error::SpannedError),
+
     // I/O Error
     #[error("I/O: {0}")]
     Io(#[from] std::io::Error),

src/main.rs

@@ -1,9 +1,29 @@
+
+pub mod config;
 pub mod error;
 
+use crate::config::Config;
 use crate::error::Error;
+use std::env;
+use std::fs::OpenOptions;
+use std::io::Read;
 
 #[tokio::main]
 async fn main() -> Result<(), Error> {
+    // Get args (config path)
+    let mut args = env::args();
+    if args.len() <= 1 {
+        panic!("USAGE: chorus <config_path>");
+    }
+    let _ = args.next(); // ignore program name
+    let config_path = args.next().unwrap();
+
+    // Read config file
+    let mut file = OpenOptions::new().read(true).open(config_path)?;
+    let mut contents = String::new();
+    file.read_to_string(&mut contents)?;
+    let config: Config = ron::from_str(&contents)?;
+
     println!("No main yet.");
 
     Ok(())