structure

Cargo.toml

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+[workspace]
+members = ["./game", "./wrapper"]

game/Cargo.toml

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+[package]
+name = "game"
+publish = false
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+cgmath = "0.18"

game/src/lib.rs

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+
+/// The game entrypoint
+pub fn game_begin() {
+
+}

wrapper/Cargo.toml

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+[package]
+name = "wrapper"
+publish = false
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+game =  { version = "0.1", path = "../game"}

wrapper/README.md

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+# Ignore this
+
+This crate exists to wrap the `game` lib crate. This is just a little workaround to make the Rust compiler better cache files when developing the game.

wrapper/src/main.rs

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+use game::game_begin;
+
+fn main() {
+    game_begin();
+}