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/grin/src/build
    
    the code of the file until where you have to start completion: // Copyright 2021 The Grin Developers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2
    
fn main() {
	// Setting up git hooks in the project: rustfmt and so on.
	let git_hooks = format!(
		"git config core.hooksPath {}",
		PathBuf::from("./.hooks").to_str().unwrap()
	);

	if cfg!(target_os = "windows") {
		Command::new("cmd")
			.args(&["/C", &git_hooks])
			.output()
			.expect("failed to execute git config for hooks");
	} else {
		Command::new("sh")
			.args(&["-c", &git_hooks])
			.output()
			.expect("failed to execute git config for hooks");
	}

	// build and versioning information
	let mut opts = built::Options::default();
	opts.set_dependencies(true);
	let out_dir_path = format!("{}{}", env::var("OUT_DIR").unwrap(), "/built.rs");
	// don't fail the build if something's missing, may just be cargo release
	let _ = built::write_built_file_with_opts(
		&opts,
		Path::new(env!("CARGO_MANIFEST_DIR")),
		Path::new(&out_dir_path),
	);
}