// option. This file may not be copied, modified, or distributed
// except according to those terms.
-use utils;
-
+use std::collections::BTreeMap;
+use std::io;
use std::path::{Path, PathBuf};
-use std::collections::HashMap;
use syntax::ast;
use syntax::codemap;
-use syntax::parse::parser;
+use syntax::parse::{parser, DirectoryOwnership};
+use syntax_pos::symbol::Symbol;
+use config::FileName;
+use utils::contains_skip;
/// List all the files containing modules of a crate.
/// If a file is used twice in a crate, it appears only once.
-pub fn list_files<'a>(krate: &'a ast::Crate,
- codemap: &codemap::CodeMap)
- -> HashMap<PathBuf, &'a ast::Mod> {
- let mut result = HashMap::new();
- let root_filename: PathBuf = codemap.span_to_filename(krate.span).into();
- list_submodules(&krate.module,
- root_filename.parent().unwrap(),
- codemap,
- &mut result);
- result.insert(root_filename, &krate.module);
- result
+pub fn list_files<'a>(
+ krate: &'a ast::Crate,
+ codemap: &codemap::CodeMap,
+) -> Result<BTreeMap<FileName, &'a ast::Mod>, io::Error> {
+ let mut result = BTreeMap::new(); // Enforce file order determinism
+ let root_filename = codemap.span_to_filename(krate.span);
+ {
+ let parent = match root_filename {
+ codemap::FileName::Real(ref path) => path.parent().unwrap(),
+ _ => Path::new(""),
+ };
+ list_submodules(&krate.module, parent, None, codemap, &mut result)?;
+ }
+ result.insert(root_filename.into(), &krate.module);
+ Ok(result)
+}
+
+fn path_value(attr: &ast::Attribute) -> Option<Symbol> {
+ if attr.name() == "path" {
+ attr.value_str()
+ } else {
+ None
+ }
+}
+
+// N.B. Even when there are multiple `#[path = ...]` attributes, we just need to
+// examine the first one, since rustc ignores the second and the subsequent ones
+// as unused attributes.
+fn find_path_value(attrs: &[ast::Attribute]) -> Option<Symbol> {
+ attrs.iter().flat_map(path_value).next()
}
/// Recursively list all external modules included in a module.
-fn list_submodules<'a>(module: &'a ast::Mod,
- search_dir: &Path,
- codemap: &codemap::CodeMap,
- result: &mut HashMap<PathBuf, &'a ast::Mod>) {
+fn list_submodules<'a>(
+ module: &'a ast::Mod,
+ search_dir: &Path,
+ relative: Option<ast::Ident>,
+ codemap: &codemap::CodeMap,
+ result: &mut BTreeMap<FileName, &'a ast::Mod>,
+) -> Result<(), io::Error> {
debug!("list_submodules: search_dir: {:?}", search_dir);
for item in &module.items {
- if let ast::ItemMod(ref sub_mod) = item.node {
- if !utils::contains_skip(&item.attrs) {
- let is_internal = codemap.span_to_filename(item.span) ==
- codemap.span_to_filename(sub_mod.inner);
- let dir_path = if is_internal {
- search_dir.join(&item.ident.to_string())
+ if let ast::ItemKind::Mod(ref sub_mod) = item.node {
+ if !contains_skip(&item.attrs) {
+ let is_internal =
+ codemap.span_to_filename(item.span) == codemap.span_to_filename(sub_mod.inner);
+ let (dir_path, relative) = if is_internal {
+ if let Some(path) = find_path_value(&item.attrs) {
+ (search_dir.join(&path.as_str()), None)
+ } else {
+ (search_dir.join(&item.ident.to_string()), None)
+ }
} else {
- let mod_path = module_file(item.ident, &item.attrs, search_dir, codemap);
+ let (mod_path, relative) =
+ module_file(item.ident, &item.attrs, search_dir, relative, codemap)?;
let dir_path = mod_path.parent().unwrap().to_owned();
- result.insert(mod_path, sub_mod);
- dir_path
+ result.insert(FileName::Real(mod_path), sub_mod);
+ (dir_path, relative)
};
- list_submodules(sub_mod, &dir_path, codemap, result);
+ list_submodules(sub_mod, &dir_path, relative, codemap, result)?;
}
}
}
+ Ok(())
}
/// Find the file corresponding to an external mod
-fn module_file(id: ast::Ident,
- attrs: &[ast::Attribute],
- dir_path: &Path,
- codemap: &codemap::CodeMap)
- -> PathBuf {
- if let Some(path) = parser::Parser::submod_path_from_attr(attrs, &dir_path) {
- return path;
+fn module_file(
+ id: ast::Ident,
+ attrs: &[ast::Attribute],
+ dir_path: &Path,
+ relative: Option<ast::Ident>,
+ codemap: &codemap::CodeMap,
+) -> Result<(PathBuf, Option<ast::Ident>), io::Error> {
+ if let Some(path) = parser::Parser::submod_path_from_attr(attrs, dir_path) {
+ return Ok((path, None));
}
- match parser::Parser::default_submod_path(id, &dir_path, codemap).result {
- Ok(parser::ModulePathSuccess { path, .. }) => path,
- Err(_) => panic!("Couldn't find module {}", id),
+ match parser::Parser::default_submod_path(id, relative, dir_path, codemap).result {
+ Ok(parser::ModulePathSuccess {
+ path,
+ directory_ownership,
+ ..
+ }) => {
+ let relative = if let DirectoryOwnership::Owned { relative } = directory_ownership {
+ relative
+ } else {
+ None
+ };
+ Ok((path, relative))
+ }
+ Err(_) => Err(io::Error::new(
+ io::ErrorKind::Other,
+ format!("Couldn't find module {}", id),
+ )),
}
}