1 // Copyright 2015 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.
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.
13 use std::path::{Path, PathBuf};
14 use std::collections::HashMap;
18 use syntax::parse::parser;
21 /// List all the files containing modules of a crate.
22 /// If a file is used twice in a crate, it appears only once.
23 pub fn list_files<'a>(krate: &'a ast::Crate,
24 codemap: &codemap::CodeMap)
25 -> HashMap<PathBuf, &'a ast::Mod> {
26 let mut result = HashMap::new();
27 let root_filename: PathBuf = codemap.span_to_filename(krate.span).into();
28 list_submodules(&krate.module,
29 root_filename.parent().unwrap(),
32 result.insert(root_filename, &krate.module);
36 /// Recursively list all external modules included in a module.
37 fn list_submodules<'a>(module: &'a ast::Mod,
39 codemap: &codemap::CodeMap,
40 result: &mut HashMap<PathBuf, &'a ast::Mod>) {
41 debug!("list_submodules: search_dir: {:?}", search_dir);
42 for item in &module.items {
43 if let ast::ItemMod(ref sub_mod) = item.node {
44 if !utils::contains_skip(&item.attrs) {
45 let is_internal = codemap.span_to_filename(item.span) ==
46 codemap.span_to_filename(sub_mod.inner);
47 let dir_path = if is_internal {
48 search_dir.join(&item.ident.to_string())
50 let mod_path = module_file(item.ident, &item.attrs, search_dir, codemap);
51 let dir_path = mod_path.parent().unwrap().to_owned();
52 result.insert(mod_path, sub_mod);
55 list_submodules(sub_mod, &dir_path, codemap, result);
61 /// Find the file corresponding to an external mod
62 fn module_file(id: ast::Ident,
63 attrs: &[ast::Attribute],
65 codemap: &codemap::CodeMap)
67 if let Some(path) = parser::Parser::submod_path_from_attr(attrs, &dir_path) {
71 match parser::Parser::default_submod_path(id, &dir_path, codemap).result {
72 Ok(parser::ModulePathSuccess { path, .. }) => path,
73 Err(_) => panic!("Couldn't find module {}", id),