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#![allow(unused)]
use std::{ffi::OsString, path::PathBuf};
#[derive(Debug)]
pub struct Helpful {
pub src: Option<PathBuf>,
pub extra: Option<String>,
pub switch: (),
pub subcommand: HelpfulCmd,
}
#[derive(Debug)]
pub enum HelpfulCmd {
Sub(Sub),
}
#[derive(Debug)]
pub struct Sub {
pub flag: bool,
}
impl Helpful {
pub const HELP: &'static str = Self::HELP_;
#[allow(dead_code)]
pub fn from_env() -> xflags::Result<Self> {
Self::from_env_()
}
#[allow(dead_code)]
pub fn from_vec(args: Vec<std::ffi::OsString>) -> xflags::Result<Self> {
Self::from_vec_(args)
}
}
impl Helpful {
fn from_env_() -> xflags::Result<Self> {
let mut p = xflags::rt::Parser::new_from_env();
Self::parse_(&mut p)
}
fn from_vec_(args: Vec<std::ffi::OsString>) -> xflags::Result<Self> {
let mut p = xflags::rt::Parser::new(args);
Self::parse_(&mut p)
}
}
impl Helpful {
fn parse_(p_: &mut xflags::rt::Parser) -> xflags::Result<Self> {
let mut switch = Vec::new();
let mut src = (false, Vec::new());
let mut extra = (false, Vec::new());
let mut sub_ = None;
while let Some(arg_) = p_.pop_flag() {
match arg_ {
Ok(flag_) => match flag_.as_str() {
"--switch" | "-s" => switch.push(()),
_ => return Err(p_.unexpected_flag(&flag_)),
},
Err(arg_) => {
match arg_.to_str().unwrap_or("") {
"sub" => {
sub_ = Some(HelpfulCmd::Sub(Sub::parse_(p_)?));
break;
}
_ => (),
}
if let (done_ @ false, buf_) = &mut src {
buf_.push(arg_.into());
*done_ = true;
continue;
}
if let (done_ @ false, buf_) = &mut extra {
buf_.push(p_.value_from_str::<String>("extra", arg_)?);
*done_ = true;
continue;
}
return Err(p_.unexpected_arg(arg_));
}
}
}
Ok(Self {
src: p_.optional("src", src.1)?,
extra: p_.optional("extra", extra.1)?,
switch: p_.required("--switch", switch)?,
subcommand: p_.subcommand(sub_)?,
})
}
}
impl Sub {
fn parse_(p_: &mut xflags::rt::Parser) -> xflags::Result<Self> {
let mut flag = Vec::new();
while let Some(arg_) = p_.pop_flag() {
match arg_ {
Ok(flag_) => match flag_.as_str() {
"--flag" | "-f" => flag.push(()),
_ => return Err(p_.unexpected_flag(&flag_)),
},
Err(arg_) => {
return Err(p_.unexpected_arg(arg_));
}
}
}
Ok(Self { flag: p_.optional("--flag", flag)?.is_some() })
}
}
impl Helpful {
const HELP_: &'static str = "\
helpful
Does stuff
Helpful stuff.
ARGS:
[src]
With an arg.
[extra]
Another arg.
This time, we provide some extra info about the
arg. Maybe some caveats, or what kinds of
values are accepted.
OPTIONS:
-s, --switch
And a switch.
SUBCOMMANDS:
helpful sub
And even a subcommand!
OPTIONS:
-f, --flag
With an optional flag. This has a really long
description which spans multiple lines.
";
}
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