From 72f4323ea56e1715fa54a39faf39cf8dbd53c2ba Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Sun, 6 Dec 2015 22:33:41 +0800
Subject: [PATCH] Tab#tap: returns tap object

---
 Library/Homebrew/tab.rb | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index c594843f6d..984b587ff5 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -28,7 +28,7 @@ class Tab < OpenStruct
       "stdlib" => stdlib,
       "source" => {
         "path" => formula.path.to_s,
-        "tap" => formula.tap,
+        "tap" => formula.tap ? formula.tap.name : nil,
         "spec" => formula.active_spec_sym.to_s
       }
     }
@@ -116,7 +116,11 @@ class Tab < OpenStruct
     else
       tab = empty
       tab.unused_options = f.options.as_flags
-      tab.source = { "path" => f.path.to_s, "tap" => f.tap, "spec" => f.active_spec_sym.to_s }
+      tab.source = {
+        "path" => f.path.to_s,
+        "tap" => f.tap ? f.tap.name : f.tap,
+        "spec" => f.active_spec_sym.to_s,
+      }
     end
 
     tab
@@ -194,11 +198,13 @@ class Tab < OpenStruct
   end
 
   def tap
-    source["tap"]
+    tap_name = source["tap"]
+    Tap.fetch(tap_name) if tap_name
   end
 
   def tap=(tap)
-    source["tap"] = tap
+    tap_name = tap.respond_to?(:name) ? tap.name : tap
+    source["tap"] = tap_name
   end
 
   def spec