Deps: minimize Tokio features (#25)

* Deps: use specific Tokio features

* Deps: run `cargo update`

* Refactor: move CLI-parsing outside Tokio runtime

* Fix: use `parse` over `try_parse`

Clap does special things behind the scenes before it exits.

* Refactor: use `tokio::main` macro for convenience

Cargo.toml

@@ -24,11 +24,12 @@ hmac = "0.12.1"
 serde = { version = "1.0.136", features = ["derive"] }
 serde_json = "1.0.79"
 sha2 = "0.10.2"
-tokio = { version = "1.17.0", features = ["full"] }
+tokio = { version = "1.17.0", features = ["rt-multi-thread", "io-util", "macros", "net", "time"] }
 tracing = "0.1.32"
 tracing-subscriber = "0.3.10"
 uuid = { version = "0.8.2", features = ["serde", "v4"] }
 
 [dev-dependencies]
 lazy_static = "1.4.0"
 rstest = "0.12.0"
+tokio = { version = "1.17.0", features = ["sync"] }

src/main.rs

@@ -47,11 +47,8 @@ enum Command {
 }
 
 #[tokio::main]
-async fn main() -> Result<()> {
-    tracing_subscriber::fmt::init();
-
-    let args = Args::parse();
-    match args.command {
+async fn run(command: Command) -> Result<()> {
+    match command {
         Command::Local {
             local_host,
             local_port,
@@ -69,3 +66,8 @@ async fn main() -> Result<()> {
 
     Ok(())
 }
+
+fn main() -> Result<()> {
+    tracing_subscriber::fmt::init();
+    run(Args::parse().command)
+}