# Rust quickstart

## 1. Install `hypertune`

Once you have a Rust application ready, install Hypertune's Rust crate and the Serde crate:

```bash
cargo add hypertune serde
```

## 2. Install the Hypertune CLI

Run the following command to install the CLI

```
curl -fsSL https://app.hypertune.com/install-cli.sh | sh
```

Alternatively, you can download the Hypertune CLI for your system:

* [Mac (x86\_64)](https://storage.googleapis.com/public-prod-hypertune/cli/darwin_x64/hypertune)
* [Mac M1 / M2 (aarch64)](https://storage.googleapis.com/public-prod-hypertune/cli/darwin_aarch64/hypertune)
* [Linux (x86\_64)](https://storage.googleapis.com/public-prod-hypertune/cli/linux_x64/hypertune)
* [Windows (x86\_64)](https://storage.googleapis.com/public-prod-hypertune/cli/windows_x64/hypertune.exe)

Then:

* Put it somewhere accessible via your `PATH`
* Add execute permissions to it with `chmod +x hypertune`
* Right-click to open it

## 3. Generate the client

Generate a type-safe client to access your flags by running:

```bash
hypertune generate --language rust --output-file-dir src --token <token> 
```

Replace `<token>` with your main project token which you can find in the Settings tab of your project.

## 4. Use the client

```rust
mod hypertune;

fn main() {
    let root_node = hypertune::create_source(hypertune::VariableValues {}, None)
        .unwrap()
        .root(hypertune::RootArgs {
            context: hypertune::Context {
                environment: hypertune::Environment::DEVELOPMENT,
                user: hypertune::User {
                    id: "test_id".to_string(),
                    name: "Test".to_string(),
                    email: "test@test.com".to_string(),
                },
            },
        });
    root_node.wait_for_initialization();
    
    let example_flag = root_node.exampleFlag().get(false);
    
    root_node.close();
}
```

## Next steps

Now you can update the logic for `exampleFlag` from the Hypertune UI without updating your code or waiting for a new build, deployment, app release, or service restart.

To add a new flag, create it in the Hypertune UI then regenerate the client.


---

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