| // 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: rustbook <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--"); |
| } |