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use std::io::Write;
pub struct Prompt {
ps1: std::string::String,
pub home: std::path::PathBuf,
}
impl Prompt {
pub fn new() -> Prompt {
let username = match std::process::Command::new("whoami").output() {
Ok(s) => {
let output = std::string::String::from_utf8(s.stdout).unwrap();
output.trim().to_string()
}
Err(e) => panic!(e),
};
let hostname = match std::process::Command::new("hostname").output() {
Ok(s) => {
let output = std::string::String::from_utf8(s.stdout).unwrap();
output.trim().to_string()
}
Err(e) => panic!(e),
};
let ready = if username == "root" {
"#"
} else {
"$"
}.to_owned();
let ps1 = String::from(" {USER}@{HOST} [{PWD}]\n\\$ ")
.replace("{USER}", &username)
.replace("{HOST}", &hostname)
.replace("\\$", &ready);
let home = match std::env::home_dir() {
Some(p) => p,
None => std::path::Path::new("/").to_path_buf(),
};
Prompt { ps1, home }
}
pub fn print(&self, pwd: &std::path::PathBuf) {
if cfg!(debug_assertions) {
println!("pwd={}", pwd.display());
}
let path = if pwd.starts_with(&self.home) {
"~".to_owned() + &pwd.strip_prefix(&self.home).unwrap().display().to_string()
} else {
pwd.display().to_string()
};
let ps1 = self.ps1.replace("{PWD}", &path);
print!("{}", ps1);
match std::io::stdout().flush() {
Ok(_) => {}
Err(_) => println!(""),
};
}
}
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