You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: build.rs
    path of file: ./repos/rust-esp32-std-demo
    
    the code of the file until where you have to start completion: use std::path::PathBuf;

use embuild::{bingen, cargo, symgen};

fn main() {
    embuild::espidf::sysenv::output();

    let cfg = embuild::espidf::sysenv::cfg_args().unwrap();
    if cfg.get("esp32s2").is_some() {
        // Future; might be possible once https://github.com/rust-lang/cargo/issues/9096 hits Cargo nightly:
        //let ulp_elf = PathBuf::from(env::var_os("CARGO_BIN_FILE_RUST_ESP32_ULP_BLINK_rust_esp32_ulp_blink").unwrap());

        let ulp_elf = PathBuf::from("ulp").join("rust-esp32-ulp-blink");
        cargo::track_file(&ulp_elf);

        // This is where the RTC Slow Mem is mapped within the ESP32-S2 memory space
        let ulp_bin = symgen::Symgen::new(&ulp_
    
fn main() {
    embuild::espidf::sysenv::output();

    let cfg = embuild::espidf::sysenv::cfg_args().unwrap();
    if cfg.get("esp32s2").is_some() {
        // Future; might be possible once https://github.com/rust-lang/cargo/issues/9096 hits Cargo nightly:
        //let ulp_elf = PathBuf::from(env::var_os("CARGO_BIN_FILE_RUST_ESP32_ULP_BLINK_rust_esp32_ulp_blink").unwrap());

        let ulp_elf = PathBuf::from("ulp").join("rust-esp32-ulp-blink");
        cargo::track_file(&ulp_elf);

        // This is where the RTC Slow Mem is mapped within the ESP32-S2 memory space
        let ulp_bin = symgen::Symgen::new(&ulp_elf, 0x5000_0000_u64)
            .run()
            .unwrap();
        cargo::track_file(ulp_bin);

        let ulp_sym = bingen::Bingen::new(ulp_elf).run().unwrap();
        cargo::track_file(ulp_sym);
    }
}