adventofcode2025/build.rs

/******************************************************************************
*	@file		build.rs
*	@author		Joey Pollack
*	@date		2025/11/20 (y/m/d)
*	@modified	2025/11/20 (y/m/d)
*	@copyright	Joseph R Pollack (2025)
*	@brief		
******************************************************************************/

// use std::process::Command;
use std::io::prelude::*;
use std::{env, fs, fs::File, path::Path};

fn main()
{
	let name = env!("CARGO_PKG_NAME");
	println!("{} build.rs started...", name);
	let in_path = Path::new("input/");
	let out_path = format!("target/{}", &env::var("PROFILE").unwrap());
    let out_path = Path::new(&out_path).join("input/");
	let test_file_name = out_path.join("foo.txt".to_string());

	if !out_path.exists()
	{	
		fs::create_dir(&out_path).expect("Failed to create the out directory");
	}

	if !in_path.exists()
	{
		fs::create_dir(&in_path).expect("failed to create dummy input path");
	}

	if !in_path.is_dir()
	{
		println!("in_path is not a directory");
	}

	// Test file
	let mut file = File::create(test_file_name).expect("Failed to create test file");
    file.write_all(b"Hello, world!").expect("Failed to write to test file");

	// Copy input files
	for f in in_path.read_dir().expect("Failed to parse directory entries")
	{
		let f = f.expect("failed to parse directly entry");
        let dest = out_path.join(f.path().file_name().unwrap());
		fs::copy(f.path(), &dest).expect(&format!("failed to copy file: {:#?}, to {:#?}", f, dest));
	}
	
	println!("{} build.rs finished", name);
}