X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=src%2Fmodules.rs;h=aa36f4103e4231268738213bb5020765b457556a;hb=bb7442802abe354a0ed844ec237cd20969789224;hp=b50c9e26895938ba981950ef73e4383e6c28728b;hpb=f5ee0f0986f23acb27fabf257e11eb76c6981601;p=rust.git

diff --git a/src/modules.rs b/src/modules.rs
index b50c9e26895..aa36f4103e4 100644
--- a/src/modules.rs
+++ b/src/modules.rs
@@ -8,65 +8,114 @@
 // 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::source_map;
+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,
+    source_map: &source_map::SourceMap,
+) -> Result<BTreeMap<FileName, &'a ast::Mod>, io::Error> {
+    let mut result = BTreeMap::new(); // Enforce file order determinism
+    let root_filename = source_map.span_to_filename(krate.span);
+    {
+        let parent = match root_filename {
+            source_map::FileName::Real(ref path) => path.parent().unwrap(),
+            _ => Path::new(""),
+        };
+        list_submodules(&krate.module, parent, None, source_map, &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>,
+    source_map: &source_map::SourceMap,
+    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 = source_map.span_to_filename(item.span)
+                    == source_map.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, source_map)?;
                     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, source_map, 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>,
+    source_map: &source_map::SourceMap,
+) -> 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, source_map).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),
+        )),
     }
 }