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1 | // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
2 | // file at the top-level directory of this distribution and at | |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
b039eaaf | 11 | //! Common API for all rustbook subcommands. |
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12 | |
13 | use error::CliResult; | |
14 | use error::CommandResult; | |
15 | use term::Term; | |
16 | ||
17 | use help; | |
18 | use build; | |
19 | use serve; | |
20 | use test; | |
21 | ||
22 | pub trait Subcommand { | |
23 | /// Mutate the subcommand by parsing its arguments. | |
24 | /// | |
25 | /// Returns `Err` on a parsing error. | |
26 | fn parse_args(&mut self, args: &[String]) -> CliResult<()>; | |
27 | /// Print the CLI usage information. | |
28 | fn usage(&self); | |
29 | /// Actually execute the subcommand. | |
30 | fn execute(&mut self, term: &mut Term) -> CommandResult<()>; | |
31 | } | |
32 | ||
33 | /// Create a Subcommand object based on its name. | |
34 | pub fn parse_name(name: &str) -> Option<Box<Subcommand>> { | |
c34b1796 AL |
35 | let cmds: [fn(&str) -> Option<Box<Subcommand>>; 4] = [help::parse_cmd, |
36 | build::parse_cmd, | |
37 | serve::parse_cmd, | |
38 | test::parse_cmd]; | |
62682a34 | 39 | for parser in &cmds { |
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40 | let parsed = (*parser)(name); |
41 | if parsed.is_some() { return parsed } | |
42 | } | |
43 | None | |
44 | } |