build.rs

use std::env;
use std::fs;
use std::io::ErrorKind;
use std::process::exit;

/// sets the configuration directory. Currently set to comply with XDG standards.
/// (will create the directory inside of $HOME/.config if it doesn't exist.)
const CONFIG_DIRECTORY: &str = ".config/shellrandomgreeter";

#[cfg(target_family = "windows")]
fn main() {
    let home = match env::home_dir() {
        Some(v) => v,
        None => {
            exit(1);
        }
    }
    .into_os_string()
    .into_string()
    .expect("Failed to get the canonical path to the user's home directory.");
    // mkdir shellrandomgreeter if it doesn't exist.
    let windows_conf = CONFIG_DIRECTORY.replace("/", "\\");
    let absolute_config_path = format!("{home}\\{windows_conf}");
    match fs::create_dir_all(&absolute_config_path) {
        Ok(()) => (),
        Err(e) => match e.kind() {
            ErrorKind::PermissionDenied => {
                panic!(
                    "Lacked permissions to create the directory:\n{}",
                    absolute_config_path
                );
            }
            ErrorKind::AlreadyExists => {
                eprintln!("The following path already exists:\n{absolute_config_path}");
                eprintln!("Skipping config directory creation:\n{absolute_config_path}");
            }
            _ => panic!("No other error should have been encountered:\n{e}"),
        },
    }

    // sets the compiler env.
    println!("cargo::rustc-env=CONFIG_DIRECTORY={}", windows_conf);
}

#[cfg(target_family = "unix")]
fn main() {
    let home = match env::home_dir() {
        Some(v) => v,
        None => {
            exit(1);
        }
    }
    .into_os_string()
    .into_string()
    .expect("Failed to get the canonical path to the user's home directory.");
    // mkdir shellrandomgreeter if it doesn't exist.
    let absolute_config_path = format!("{home}/{CONFIG_DIRECTORY}");
    match fs::create_dir_all(&absolute_config_path) {
        Ok(()) => (),
        Err(e) => match e.kind() {
            ErrorKind::PermissionDenied => {
                panic!(
                    "Lacked permissions to create the directory:\n{}",
                    absolute_config_path
                );
            }
            ErrorKind::AlreadyExists => {
                eprintln!("The following path already exists:\n{absolute_config_path}");
                eprintln!("Skipping config directory creation:\n{absolute_config_path}");
            }
            _ => panic!("No other error should have been encountered:\n{e}"),
        },
    }

    // sets the compiler env.
    println!("cargo::rustc-env=CONFIG_DIRECTORY={}", CONFIG_DIRECTORY);
}