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describe-stack.rs
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describe-stack.rs
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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0.
*/
use aws_config::meta::region::RegionProviderChain;
use aws_sdk_cloudformation::{Client, Error, Region, PKG_VERSION};
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
struct Opt {
/// The AWS Region.
#[structopt(short, long)]
region: Option<String>,
/// The name of the AWS CloudFormation stack.
#[structopt(short, long)]
stack_name: String,
/// Whether to display additional information.
#[structopt(short, long)]
verbose: bool,
}
/// Retrieves the status of a CloudFormation stack in the Region.
/// # Arguments
///
/// * `-s STACK-NAME` - The name of the stack.
/// * `[-r REGION]` - The Region in which the client is created.
/// If not supplied, uses the value of the **AWS_REGION** environment variable.
/// If the environment variable is not set, defaults to **us-west-2**.
/// * `[-v]` - Whether to display additional information.
#[tokio::main]
async fn main() -> Result<(), Error> {
tracing_subscriber::fmt::init();
let Opt {
region,
stack_name,
verbose,
} = Opt::from_args();
let region_provider = RegionProviderChain::first_try(region.map(Region::new))
.or_default_provider()
.or_else(Region::new("us-west-2"));
let shared_config = aws_config::from_env().region(region_provider).load().await;
let client = Client::new(&shared_config);
println!();
if verbose {
println!("CloudFormation version: {}", PKG_VERSION);
println!(
"Region: {}",
shared_config.region().unwrap()
);
println!("Stack: {}", &stack_name);
println!();
}
// Return an error if stack_name does not exist
let resp = client
.describe_stacks()
.stack_name(stack_name)
.send()
.await?;
// Otherwise we get a list of stacks that match the stack_name.
// The list should only have one item, so just access is via pop().
let status = resp.stacks.unwrap_or_default().pop().unwrap().stack_status;
println!("Stack status: {:?}", status);
println!();
Ok(())
}