feat: add server-only build

it's drastically faster to build,
mostly due to only including 1/10th of the dependencies

Cargo.toml

@@ -5,12 +5,23 @@ license = "AGPL-3.0-or-later"
 version = "0.1.0"
 edition = "2024"
 
+[features]
+default = [ "app" ]
+app = [ "dep:iced", "dep:smol" ]
+
 [dependencies]
 ron = "0.12.2"
-serde = "1.0.229"
-smol = "2.0.2"
 sysinfo = "0.39.6"
 
 [dependencies.iced]
 version = "0.14.0"
 features = [ "canvas", "smol" ]
+optional = true
+
+[dependencies.smol]
+version = "2.0.2"
+optional = true
+
+[dependencies.serde]
+version = "1.0.229"
+features = [ "derive" ]

flake.nix

@@ -89,6 +89,12 @@
       {
         packages.default = crate;
 
+        packages.server-only = craneLib.buildPackage {
+          name = name + "-server-only";
+          src = ./.;
+          cargoExtraArgs = "--no-default-features";
+        };
+
         checks = {
           crate-clippy = craneLib.cargoClippy (
             commonArgs

src/main.rs

@@ -1,5 +1,6 @@
 use std::env;
 
+#[cfg(feature = "app")]
 mod app;
 mod server;
 mod sysinfo_snapshot;
@@ -7,10 +8,12 @@ mod utils;
 
 fn main() {
     match env::args().nth(1).as_deref() {
-        Some("server") => server::run().unwrap(),
-
+        #[cfg(feature = "app")]
         None | Some("client") => app::run().unwrap(),
 
+        #[cfg_attr(feature = "app", allow(unreachable_patterns))]
+        None | Some("server") => server::run().unwrap(),
+
         Some(s) => panic!("invalid argument: {s}"),
     }
 }