Add CLI

Initially just basic options and seed

Cargo.lock

@@ -148,6 +148,56 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "anstream"
+version = "0.6.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8acc5369981196006228e28809f761875c0327210a891e941f4c683b3a99529b"
+dependencies = [
+ "anstyle",
+ "anstyle-parse",
+ "anstyle-query",
+ "anstyle-wincon",
+ "colorchoice",
+ "is_terminal_polyfill",
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle"
+version = "1.0.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "55cc3b69f167a1ef2e161439aa98aed94e6028e5f9a59be9a6ffb47aef1651f9"
+
+[[package]]
+name = "anstyle-parse"
+version = "0.2.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3b2d16507662817a6a20a9ea92df6652ee4f94f914589377d69f3b21bc5798a9"
+dependencies = [
+ "utf8parse",
+]
+
+[[package]]
+name = "anstyle-query"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79947af37f4177cfead1110013d678905c37501914fba0efea834c3fe9a8d60c"
+dependencies = [
+ "windows-sys 0.59.0",
+]
+
+[[package]]
+name = "anstyle-wincon"
+version = "3.0.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca3534e77181a9cc07539ad51f2141fe32f6c3ffd4df76db8ad92346b003ae4e"
+dependencies = [
+ "anstyle",
+ "once_cell",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "approx"
 version = "0.5.1"
@@ -1349,6 +1399,46 @@ dependencies = [
  "libloading",
 ]
 
+[[package]]
+name = "clap"
+version = "4.5.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6088f3ae8c3608d19260cd7445411865a485688711b78b5be70d78cd96136f83"
+dependencies = [
+ "clap_builder",
+ "clap_derive",
+]
+
+[[package]]
+name = "clap_builder"
+version = "4.5.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22a7ef7f676155edfb82daa97f99441f3ebf4a58d5e32f295a56259f1b6facc8"
+dependencies = [
+ "anstream",
+ "anstyle",
+ "clap_lex",
+ "strsim",
+]
+
+[[package]]
+name = "clap_derive"
+version = "4.5.32"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "09176aae279615badda0765c0c0b3f6ed53f4709118af73cf4655d85d1530cd7"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "clap_lex"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f46ad14479a25103f283c0f10005961cf086d8dc42205bb44c46ac563475dca6"
+
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
@@ -1359,6 +1449,12 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "colorchoice"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b63caa9aa9397e2d9480a9b13673856c78d8ac123288526c37d7839f2a86990"
+
 [[package]]
 name = "combine"
 version = "4.6.7"
@@ -1605,6 +1701,7 @@ version = "0.1.0"
 dependencies = [
  "avian2d",
  "bevy",
+ "clap",
  "log",
  "rand 0.9.0",
  "rand_chacha 0.9.0",
@@ -2038,6 +2135,12 @@ dependencies = [
  "foldhash",
 ]
 
+[[package]]
+name = "heck"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
+
 [[package]]
 name = "hermit-abi"
 version = "0.4.0"
@@ -2091,6 +2194,12 @@ dependencies = [
  "hashbrown 0.15.2",
 ]
 
+[[package]]
+name = "is_terminal_polyfill"
+version = "1.70.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7943c866cc5cd64cbc25b2e01621d07fa8eb2a1a23160ee81ce38704e97b8ecf"
+
 [[package]]
 name = "itertools"
 version = "0.13.0"
@@ -3545,6 +3654,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6637bab7722d379c8b41ba849228d680cc12d0a45ba1fa2b48f2a30577a06731"
 
+[[package]]
+name = "strsim"
+version = "0.11.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7da8b5736845d9f2fcb837ea5d9e2628564b3b043a70948a3f0b778838c5fb4f"
+
 [[package]]
 name = "svg_fmt"
 version = "0.4.4"
@@ -3877,6 +3992,12 @@ version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
 
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
 [[package]]
 name = "uuid"
 version = "1.12.1"

Cargo.toml

@@ -2,6 +2,7 @@
 name = "distributed_physics_test"
 version = "0.1.0"
 edition = "2024"
+description = "Experimental distributed physics system"
 
 [profile.dev]
 opt-level = 1
@@ -29,6 +30,7 @@ bevy = { version = "0.15.3", default-features = false, features = [
 	"multi_threaded",
 	"wayland",
 ] }
+clap = { version = "4.5.32", features = ["derive"] }
 log = { version = "*", features = [
 	"max_level_debug",
 	"release_max_level_warn",

src/main.rs

@@ -9,19 +9,22 @@ use bevy::{
     input::common_conditions::input_pressed,
     prelude::*,
 };
+use clap::Parser;
 
 use distributed_physics_test::Random;
 
 const AREA_WIDTH: f32 = 750.;
 const PLAYER_SIZE: f32 = 30.;
 
-#[derive(Default)]
+#[derive(Parser)]
+#[command(version, about)]
 struct AppSettings {
+    #[arg(short, long, default_value = "")]
     seed: String,
 }
 
 fn main() -> AppExit {
-    run_app(AppSettings::default())
+    run_app(AppSettings::parse())
 }
 
 fn run_app(settings: AppSettings) -> AppExit {