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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Implementation of the `help` subcommand. Currently just prints basic usage info.
use subcommand::Subcommand;
use error::CliResult;
use error::CommandResult;
use term::Term;
struct Help;
pub fn parse_cmd(name: &str) -> Option<Box<Subcommand>> {
match name {
"help" | "--help" | "-h" | "-?" => Some(Box::new(Help)),
_ => None
}
}
impl Subcommand for Help {
fn parse_args(&mut self, _: &[String]) -> CliResult<()> {
Ok(())
}
fn usage(&self) {}
fn execute(&mut self, _: &mut Term) -> CommandResult<()> {
usage();
Ok(())
}
}
pub fn usage() {
println!("Usage: rust-book <command> [<args>]");
println!("");
println!("The <command> must be one of:");
println!(" help Print this message.");
println!(" build Build the book in subdirectory _book");
println!(" serve --NOT YET IMPLEMENTED--");
println!(" test --NOT YET IMPLEMENTED--");
}
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