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use anyhow::{Error, Result};
use std::path::PathBuf;
#[derive(Default)]
pub struct Args {
pub display_help: bool,
pub display_version: bool,
pub load_tutor: bool,
pub verbosity: u64,
pub files: Vec<PathBuf>,
}
impl Args {
pub fn parse_args() -> Result<Args> {
let mut args = Args::default();
let argv: Vec<String> = std::env::args().collect();
let mut iter = argv.iter();
iter.next(); // skip the program, we don't care about that
for arg in &mut iter {
match arg.as_str() {
"--" => break, // stop parsing at this point treat the remaining as files
"--version" => args.display_version = true,
"--help" => args.display_help = true,
"--tutor" => args.load_tutor = true,
arg if arg.starts_with("--") => {
return Err(Error::msg(format!(
"unexpected double dash argument: {}",
arg
)))
}
arg if arg.starts_with('-') => {
let arg = arg.get(1..).unwrap().chars();
for chr in arg {
match chr {
'v' => args.verbosity += 1,
'V' => args.display_version = true,
'h' => args.display_help = true,
_ => return Err(Error::msg(format!("unexpected short arg {}", chr))),
}
}
}
arg => args.files.push(PathBuf::from(arg)),
}
}
// push the remaining args, if any to the files
for filename in iter {
args.files.push(PathBuf::from(filename));
}
Ok(args)
}
}
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