You cannot directly use Terraform or Pulumi as a native Rust library because their core engines are written in Go and TypeScript/Python respectively, but you can integrate them effectively by invoking their CLI tools from Rust or by using the Pulumi SDK which offers a Rust provider. The most common pattern is to spawn the Terraform or Pulumi CLI as a subprocess from your Rust application to manage infrastructure programmatically, or to write a custom Pulumi provider in Rust if you need to manage resources that don't have an existing provider.
For Terraform, the standard approach is to use the std::process::Command API to execute terraform init, plan, and apply commands. This keeps your Rust code decoupled from the complex state management logic handled by the Go binary. You can capture the output to parse JSON plans or handle errors programmatically.
use std::process::Command;
fn run_terraform_apply() -> Result<(), Box<dyn std::error::Error>> {
let output = Command::new("terraform")
.args(&["apply", "-auto-approve"])
.output()?;
if output.status.success() {
println!("Infrastructure applied successfully");
} else {
let stderr = String::from_utf8_lossy(&output.stderr);
return Err(format!("Terraform failed: {}", stderr).into());
}
Ok(())
}
For Pulumi, you have two distinct options. First, you can invoke the Pulumi CLI similarly to Terraform. Second, if you are building a custom resource provider, you can write the provider logic in Rust using the pulumi-providers crate, which compiles to a binary that the Pulumi engine can call via gRPC. This allows you to define complex resource logic in Rust while managing it through the standard Pulumi workflow.
// Example of invoking Pulumi CLI from Rust
use std::process::Command;
fn run_pulumi_up() -> Result<(), Box<dyn std::error::Error>> {
let output = Command::new("pulumi")
.args(&["up", "--yes"])
.output()?;
if output.status.success() {
let stdout = String::from_utf8_lossy(&output.stdout);
println!("{}", stdout);
} else {
let stderr = String::from_utf8_lossy(&output.stderr);
return Err(format!("Pulumi failed: {}", stderr).into());
}
Ok(())
}
If you need to parse Terraform state or plans directly within Rust without calling the CLI, you can use the tfstate crate to read .tfstate JSON files, but this is read-only and does not allow you to execute changes. For most production workflows, treating Terraform and Pulumi as external tools and orchestrating them via Rust subprocesses provides the best balance of safety, maintainability, and access to the full feature set of the infrastructure-as-code engines.