PrettyPrompt/src/main.rs

use std::env::current_dir as current_dir;
use std::env::var_os as var_os;
use std::env::args as args;
use colored::Colorize;

fn main() -> std::io::Result<()> {
    let angle = "❯";
    let pwd = current_dir()?;
    let mut dir = pwd.display().to_string();
    let args: Vec<String> = args().collect();
    let shell: String;
    let user = var_os("USER").expect("noDir").to_str().expect("noDir").to_string();
    let homedir = var_os("HOME").expect("noDir").to_str().expect("noDir").to_string();
    
    if args.len() > 1 {
        shell = args[1].clone();
    }
    else {
        shell = "none".to_string();
    }
    
    let shell_char = match shell.as_str() {
        "bash"      => "",
        "zsh"       => "󰰶",
        "fish"      => "󰈺",
        "nushell"   => "",
        "ion"       => "",
        _           => "󱆃",
    };
    
    dir = str::replace(&dir, &homedir, "~");    // Abreviate homedir with "~"

    let mut dir0 = dir.clone();
    let slashes = dir.matches("/").count();
    //println!("{}",slashes);

    if slashes > 3 {
       // let mut dir0 = dir;
        let parts: Vec<&str> = dir.split("/").collect();
        let len = parts.len() - 1;
        let mut fch: String;

        for p in &parts[0..len] {
            let part = p;
            fch = part.chars().next().expect("REASON").to_string();    //1st char of p
            dir0 = str::replace(&dir0, part, &fch);
            //println!("{}__{}__{}",p,fch,dir0);
        }
    }
    //dir = dir0;
    
    print!("{} {}{} ",
                shell_char.truecolor(75,75,75),
                dir0.italic().truecolor(75,75,75),
                angle.truecolor(0, 255, 180),
             );
    Ok(())
}