Require -c config file command-line argument.

client/config.toml

@@ -0,0 +1,2 @@
+user_name = "solstice"
+password = "topsekrit"

client/src/main.rs

@@ -1,3 +1,5 @@
+use std::path::Path;
+
 use anyhow::Context;
 use clap::{App, Arg};
 use crossbeam_channel;
@@ -20,16 +22,15 @@ mod room;
 mod testing;
 mod user;
 
-use config::Config;
+use config::{Config, TomlConfig};
 use context::{ContextBundle, ContextOptions};
 use dispatcher::Dispatcher;
 
-fn old_main() {
+fn old_main(config: Config) {
   let (request_tx, _request_rx) = crossbeam_channel::bounded(100);
   let (_response_tx, response_rx) = crossbeam_channel::bounded(100);
 
-  let mut client =
-    client::Client::new(request_tx, response_rx, Config::default());
+  let mut client = client::Client::new(request_tx, response_rx, config);
 
   client.run();
 }
@@ -77,9 +78,7 @@ async fn run_client(
   Ok(())
 }
 
-async fn async_main() -> anyhow::Result<()> {
-  let config = Config::default();
-
+async fn async_main(config: Config) -> anyhow::Result<()> {
   let mut options = ContextOptions::default();
   options.initial_state.user_name = config.credentials.user_name().to_string();
 
@@ -142,15 +141,29 @@ async fn main() -> anyhow::Result<()> {
         .long("sync")
         .help("Use the old synchronous engine."),
     )
+    .arg(
+      Arg::with_name("config")
+        .short("c")
+        .long("config")
+        .value_name("FILE")
+        .required(true)
+        .help("Path to the config file to use."),
+    )
     .get_matches();
 
+  let path = Path::new(matches.value_of("config").unwrap());
+  let toml_config = TomlConfig::from_file_path(path).await?;
+  let config = Config::from_toml(toml_config)?;
+
   if matches.is_present("sync") {
     info!("Running in synchronous mode.");
-    tokio::task::spawn_blocking(old_main)
+    tokio::task::spawn_blocking(|| old_main(config))
       .await
       .context("running synchronous main")
   } else {
     info!("Running in asynchronous mode.");
-    async_main().await.context("running asynchronous main")
+    async_main(config)
+      .await
+      .context("running asynchronous main")
   }
 }