From 22f064cca7651eaf2980fcfa27618d99c633a589 Mon Sep 17 00:00:00 2001
From: Edwin Cheng <edwin0cheng@gmail.com>
Date: Tue, 10 Mar 2020 22:00:31 +0800
Subject: Add resolve_extern_path in DB

---
 crates/ra_db/src/lib.rs | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

(limited to 'crates/ra_db/src/lib.rs')

diff --git a/crates/ra_db/src/lib.rs b/crates/ra_db/src/lib.rs
index fb002d717..9bf3fe248 100644
--- a/crates/ra_db/src/lib.rs
+++ b/crates/ra_db/src/lib.rs
@@ -11,7 +11,8 @@ use ra_syntax::{ast, Parse, SourceFile, TextRange, TextUnit};
 pub use crate::{
     cancellation::Canceled,
     input::{
-        CrateGraph, CrateId, CrateName, Dependency, Edition, Env, FileId, SourceRoot, SourceRootId,
+        CrateGraph, CrateId, CrateName, Dependency, Edition, Env, ExternSourceId, FileId,
+        SourceRoot, SourceRootId,
     },
 };
 pub use relative_path::{RelativePath, RelativePathBuf};
@@ -87,6 +88,12 @@ pub trait FileLoader {
     fn resolve_relative_path(&self, anchor: FileId, relative_path: &RelativePath)
         -> Option<FileId>;
     fn relevant_crates(&self, file_id: FileId) -> Arc<Vec<CrateId>>;
+
+    fn resolve_extern_path(
+        &self,
+        extern_id: ExternSourceId,
+        relative_path: &RelativePath,
+    ) -> Option<FileId>;
 }
 
 /// Database which stores all significant input facts: source code and project
@@ -164,4 +171,13 @@ impl<T: SourceDatabaseExt> FileLoader for FileLoaderDelegate<&'_ T> {
         let source_root = self.0.file_source_root(file_id);
         self.0.source_root_crates(source_root)
     }
+
+    fn resolve_extern_path(
+        &self,
+        extern_id: ExternSourceId,
+        relative_path: &RelativePath,
+    ) -> Option<FileId> {
+        let source_root = self.0.source_root(SourceRootId(extern_id.0));
+        source_root.file_by_relative_path(&relative_path)
+    }
 }
-- 
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