Cargo Watch: To Recompile Rust Project Automatically

cargo-watch is a tool that allows to automatically recompile Rust project whenever there is a change in the Rust source code.

How to install cargo-watch

cargo install cargo-watch

Logs:

 Updating crates.io index
  Downloaded cargo-watch v8.4.0
  Downloaded 1 crate (171.1 KB) in 0.74s
  Installing cargo-watch v8.4.0
....
  Compiling cargo-watch v8.4.0
    Finished release [optimized] target(s) in 51.38s
  Installing /Users/c2ctech/.cargo/bin/cargo-watch
   Installed package `cargo-watch v8.4.0` (executable `cargo-watch`)

Cargo Watch Usage Examples

Syntax:

cargo watch [-x command]...

1. To Watch Tests

cargo watch -x test

2. To Watch and Run a Binary

cargo watch -x run

3. To Watch Builds

cargo watch -x build

4. To Watch and Build with Release Optimization

cargo watch -x "build --release"

5. To Watch and Run Custom Commands

cargo watch -x "run -- arg1 arg2"

6. To Watch Specific Package

cargo watch -p package-name build

7. To Watch Run Test for Specific Package

cargo watch -p package-name test

8. To Watch an arbitrary command

cargo watch -- echo Hello world

Facing issues? Have Questions? Post them here! I am happy to answer!

Author Info:

Rakesh (He/Him) has over 14+ years of experience in Web and Application development. He is the author of insightful How-To articles for Code2care.

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