shitbox/corebox/commands/echo/mod.rs
Nathan Fisher 06b88d2c24 Refactoring:
- Split into workspace crates
- Split into two binaries `corebox` and `hashbox`
- Add `mount` crate to workspace to prepare for third binary `utilbox`
2023-02-05 23:50:59 -05:00

49 lines
1.3 KiB
Rust

use super::Cmd;
use clap::{Arg, Command};
use std::{env, error::Error};
#[derive(Debug, Default)]
pub struct Echo;
impl Cmd for Echo {
fn cli(&self) -> clap::Command {
Command::new("echo")
.about("Display a line of text")
.long_about("Echo the STRING(s) to standard output")
.author("Nathan Fisher")
.args([
Arg::new("inline")
.short('n')
.help("Do not output a trailing newline"),
Arg::new("STRING").num_args(1..),
])
}
fn run(&self, _matches: &clap::ArgMatches) -> Result<(), Box<dyn Error>> {
let args: Vec<String> = env::args().collect();
let idx = match shitbox::progname() {
Some(s) if s.as_str() == "echo" => 1,
Some(_) => 2,
None => unreachable!(),
};
let len = args.len();
let n = len > idx && args[idx] == "-n";
let i = if n { idx + 1 } else { idx };
for (index, arg) in args.iter().enumerate().skip(i) {
if index < len - 1 {
print!("{arg} ");
} else {
print!("{arg}");
}
}
if !n {
println!();
}
Ok(())
}
fn path(&self) -> Option<shitbox::Path> {
Some(shitbox::Path::Bin)
}
}