main.rs

use std::path::Path;

fn main() {
    let path =  Path::new("./package");
    if path.exists() {
        if path.is_dir() {
            println!("{:?} is a directory", path);
        } else {
            println!("{:?} is not a directory", path);
        }
    } else {
        println!("{:?} does not exist", path);
    }
}

/* example:

$ touch package
$ ./target/debug/myisdir 
"./package" is not a directory

$ rm package 
$ mkdir package
$ ./target/debug/myisdir 
"./package" is a directory

$ rm -rf package
$ ./target/debug/myisdir 
"./package" does not exist
  
*/