Added rustup stuff into build.rs

README.md

@@ -4,14 +4,9 @@ This package provides a program that will emit a JSON serialisation of the Stabl
 
 ## Building
 
-For first-time builds, run: (requries [rustup](https://www.rust-lang.org/tools/install))
+NOTE: requries [rustup](https://www.rust-lang.org/tools/install)
 
-```shell
-rustup install nightly-2024-11-29;
-rustup default nightly-2024-11-29;
-rustup component add rustc-dev;
-rustup component add llvm-dev;
-```
+The `build.rs` script will ensure that the correct version of rust and the required components are installed and defaulted.
 
 ## Usage
 

build.rs

@@ -0,0 +1,31 @@
+use std::process::Command;
+
+fn main() {
+    let status = Command::new("rustup")
+        .args(&["install", "nightly-2024-11-29"])
+        .status()
+        .expect("build.rs failed to install nightly-2024-11-29");
+
+    println!("Installed nightly-2024-11-29: {}", status);
+
+    let status = Command::new("rustup")
+        .args(&["default", "nightly-2024-11-29"])
+        .status()
+        .expect("build.rs failed to default nightly-2024-11-29");
+
+    println!("Defaulted nightly-2024-11-29: {}", status);
+
+    let status = Command::new("rustup")
+        .args(&["component", "add", "rustc-dev"])
+        .status()
+        .expect("build.rs failed to install rustc-dev");
+
+    println!("Added component rustc-dev: {}", status);
+
+    let status = Command::new("rustup")
+        .args(&["component", "add", "llvm-tools"])
+        .status()
+        .expect("build.rs failed to install llvm-tools");
+
+    println!("Added component llvm-tools: {}", status);
+}