use toml_edit::DocumentMut;
const RUST_TOOLCHAIN: &str = r#"
[toolchain]
channel = "nightly-2025-02-25"
components = ["cargo", "llvm-tools", "rust-src", "rust-std", "rustc", "rustc-dev", "rustfmt"]
profile = "minimal"
"#;
fn main() {
println!("cargo::rerun-if-changed=build.rs");
println!("cargo::rerun-if-changed=../rust-toolchain.toml");
let rust_toolchain = RUST_TOOLCHAIN
.parse::<DocumentMut>()
.expect("Failed to parse `rust-toolchain.toml`.");
let channel = rust_toolchain["toolchain"]["channel"]
.as_str()
.expect("Could not find `toolchain.channel` key in `rust-toolchain.toml`.");
println!("cargo::rustc-env=RUST_TOOLCHAIN_CHANNEL={channel}");
}