$ cargo watch

Cargo Watch watches over your project's source for changes, and runs Cargo commands when they occur.

If you've used nodemon, guard, or entr, it will probably feel familiar.

• License: Apache 2.0.
• Website: watchexec.github.io.
• Minimum Supported Rust Version: 1.58.0.

Install

Pre-built binaries are available from the website or alternatively on the Github Releases tab.

With cargo-binstall:

$ cargo binstall cargo-watch

With cargo:

$ cargo install cargo-watch

From source:

# clone:
$ git clone https://github.com/watchexec/cargo-watch
$ cd cargo-watch

# build:
$ cargo build --release
$ target/release/cargo-watch -h

# or install:
$ cargo install --path .
$ cargo watch -h

This repository contains a manual page and shell completions that you may want to install; the pre-built packages also include these.

Usage

By default, it runs check. You can easily override this, though:

$ cargo watch [-x command]...

A few examples:

# Run tests only
$ cargo watch -x test

# Run check then tests
$ cargo watch -x check -x test

# Run run with arguments
$ cargo watch -x 'run -- --some-arg'

# Run an arbitrary command
$ cargo watch -- echo Hello world

# Run with features passed to cargo
$ cargo watch --features "foo,bar"

There's a lot more you can do! Check out:

• Usage guide
• Manual page
• Troubleshooting

About

Created by Félix Saparelli and awesome contributors.