Set up Rust on Cloud Shell

Cloud Shell provides a browser-based command-line environment for running examples and testing Google Cloud APIs. This document shows you how to configure the Rust toolchain and run a Secret Manager sample using the Cloud Client Libraries for Rust in Cloud Shell.

Before you begin

Before running the commands in this document, select or create a Google Cloud project with billing enabled.

Start Cloud Shell

Complete the following steps to select a project and open a Cloud Shell session:

In the Google Cloud console, select or create a Google Cloud project.

Go to project selector
Click Activate Cloud Shell at the top of the Google Cloud console to start a shell session. If prompted, authorize Cloud Shell to use your credentials for Google Cloud API calls.

Configure Rust

Cloud Shell includes rustup preinstalled. Complete the following steps to configure and verify the Rust toolchain:

Configure the stable Rust toolchain as the default:
```
rustup default stable
```
Verify your Cargo and Rust installation:
```
cargo --version
```

Install a client library in Cloud Shell

To enable the API, add dependencies, and run the sample program, complete the following steps:

Enable the Secret Manager API in your project:

gcloud services enable secretmanager.googleapis.com

Create a binary crate and change to its directory:
```
cargo new my-project
cd my-project
```

Add the Secret Manager client library, google-cloud-gax, and tokio to your project:

cargo add google-cloud-secretmanager-v1 google-cloud-gax
cargo add tokio --features macros,rt-multi-thread

Replace the contents of src/main.rs with the following code:

#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
    use google_cloud_gax::paginator::ItemPaginator as _;
    use google_cloud_secretmanager_v1::client::SecretManagerService;
    let project_id = std::env::args().nth(1).unwrap();
    let client = SecretManagerService::builder().build().await?;

    let mut items = client
        .list_secrets()
        .set_parent(format!("projects/{project_id}"))
        .by_item();
    while let Some(item) = items.next().await {
        println!("{}", item?.name);
    }
    Ok(())
}

Run the program, passing your Google Cloud project ID as an argument:
```
PROJECT_ID=$(gcloud config get project)
cargo run -- "${PROJECT_ID}"
```
The program prints the names of the secrets in your project. If your project doesn't have any secrets yet, create a secret and run the command again to see it in the output.

Clean up

To avoid incurring charges to your Google Cloud account for the resources used in this document, delete any test secrets that you created and remove the my-project directory from your Cloud Shell home directory when you're finished.

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