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use ansi_term::{Color, Style};
use std::env;
use std::process::Command;
use super::{Context, Module};
/// Creates a module with the current user's username
///
/// Will display the username if any of the following criteria are met:
/// - The current user isn't the same as the one that is logged in (`$LOGNAME` != `$USER`)
/// - The current user is root (UID = 0)
/// - The user is currently connected as an SSH session (`$SSH_CONNECTION`)
pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
let user = env::var("USER").ok();
let logname = env::var("LOGNAME").ok();
let ssh_connection = env::var("SSH_CONNECTION").ok();
const ROOT_UID: Option<u32> = Some(0);
let user_uid = get_uid();
if user != logname || ssh_connection.is_some() || user_uid == ROOT_UID {
let mut module = context.new_module("username");
let module_style = get_mod_style(user_uid, &module);
module.set_style(module_style);
module.new_segment("username", &user?);
return Some(module);
}
None
}
fn get_uid() -> Option<u32> {
match Command::new("id").arg("-u").output() {
Ok(output) => String::from_utf8(output.stdout)
.map(|uid| uid.trim().parse::<u32>().ok())
.ok()?,
Err(_) => None,
}
}
fn get_mod_style(user_uid: Option<u32>, module: &Module) -> Style {
match user_uid {
Some(0) => module
.config_value_style("style_root")
.unwrap_or_else(|| Color::Red.bold()),
_ => module
.config_value_style("style_user")
.unwrap_or_else(|| Color::Yellow.bold()),
}
}
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