Rust Project Workflow
A Rust project involves two related tool layers. Rustup selects and updates compiler toolchains; Cargo describes, checks, builds, runs, and resolves dependencies for a project.
Create a Project
cargo new hello_world
cd hello_world
Cargo creates source code and a Cargo.toml manifest. The manifest records package metadata and dependencies:
[package]
name = "hello_world"
version = "0.1.0"
edition = "2021"
[dependencies]
A project may produce an executable or a library. Libraries expose code for other packages, while executables have an entry point such as main.
Use the Shortest Feedback Loop
| Command | Purpose |
|---|---|
cargo check |
Type-check the project without producing the final executable. |
cargo build |
Produce a development build. |
cargo run |
Build and run an executable. |
cargo build --release |
Produce an optimized release build. |
rustfmt |
Format Rust source according to the standard style. |
During ordinary development, cargo check is often the cheapest way to ask whether the compiler accepts the current change. Build or run when an artifact or runtime behavior must be inspected.
Add Dependencies Deliberately
Dependencies are declared in Cargo.toml. Cargo resolves and downloads them during checking or building. The manifest is the durable description; generated build output under target/ is disposable.
Release builds optimize for execution rather than compilation speed and are written separately from development builds. A successful release build is still only one part of shipping software; packaging and verification belong in a release automation checklist.