From 7ff9cbeb992c7c20d8cbbca8ce2530930636fe53 Mon Sep 17 00:00:00 2001
From: Alex Crichton <alex@alexcrichton.com>
Date: Tue, 2 Feb 2016 09:31:53 -0800
Subject: [PATCH] Get Box<Source> to implement Source

---
 src/cargo/core/registry.rs |  6 ++++++
 src/cargo/core/source.rs   | 14 ++++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/src/cargo/core/registry.rs b/src/cargo/core/registry.rs
index ccfe87cab..6dc2d9cc4 100644
--- a/src/cargo/core/registry.rs
+++ b/src/cargo/core/registry.rs
@@ -26,6 +26,12 @@ impl Registry for Vec<Package> {
     }
 }
 
+impl<'a, T: ?Sized + Registry + 'a> Registry for Box<T> {
+    fn query(&mut self, name: &Dependency) -> CargoResult<Vec<Summary>> {
+        (**self).query(name)
+    }
+}
+
 /// This structure represents a registry of known packages. It internally
 /// contains a number of `Box<Source>` instances which are used to load a
 /// `Package` from.
diff --git a/src/cargo/core/source.rs b/src/cargo/core/source.rs
index 83098c575..e590f661b 100644
--- a/src/cargo/core/source.rs
+++ b/src/cargo/core/source.rs
@@ -37,6 +37,20 @@ pub trait Source: Registry {
     fn fingerprint(&self, pkg: &Package) -> CargoResult<String>;
 }
 
+impl<'a, T: Source + ?Sized + 'a> Source for Box<T> {
+    fn update(&mut self) -> CargoResult<()> {
+        (**self).update()
+    }
+
+    fn download(&mut self, id: &PackageId) -> CargoResult<Package> {
+        (**self).download(id)
+    }
+
+    fn fingerprint(&self, pkg: &Package) -> CargoResult<String> {
+        (**self).fingerprint(pkg)
+    }
+}
+
 #[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
 enum Kind {
     /// Kind::Git(<git reference>) represents a git repository
-- 
2.30.2