From fab16b83e94cb38d9f90834c87b7f1604f19f14e Mon Sep 17 00:00:00 2001
From: Xu Cheng <xucheng@me.com>
Date: Thu, 14 Jan 2016 18:55:47 +0800
Subject: [PATCH] tab: add source modified time metadata

---
 Library/Homebrew/tab.rb           | 10 +++++++++-
 Library/Homebrew/test/test_tab.rb | 19 ++++++++++---------
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/Library/Homebrew/tab.rb b/Library/Homebrew/tab.rb
index 975e2a6104..41697abb83 100644
--- a/Library/Homebrew/tab.rb
+++ b/Library/Homebrew/tab.rb
@@ -15,7 +15,7 @@ class Tab < OpenStruct
     CACHE.clear
   end
 
-  def self.create(formula, compiler, stdlib, build)
+  def self.create(formula, compiler, stdlib, build, source_modified_time)
     attributes = {
       "used_options" => build.used_options.as_flags,
       "unused_options" => build.unused_options.as_flags,
@@ -23,6 +23,7 @@ class Tab < OpenStruct
       "built_as_bottle" => build.bottle?,
       "poured_from_bottle" => false,
       "time" => Time.now.to_i,
+      "source_modified_time" => source_modified_time.to_i,
       "HEAD" => Homebrew.git_head,
       "compiler" => compiler,
       "stdlib" => stdlib,
@@ -43,6 +44,7 @@ class Tab < OpenStruct
   def self.from_file_content(content, path)
     attributes = Utils::JSON.load(content)
     attributes["tabfile"] = path
+    attributes["source_modified_time"] ||= 0
     attributes["source"] ||= {}
 
     tapped_from = attributes["tapped_from"]
@@ -133,6 +135,7 @@ class Tab < OpenStruct
       "built_as_bottle" => false,
       "poured_from_bottle" => false,
       "time" => nil,
+      "source_modified_time" => 0,
       "HEAD" => nil,
       "stdlib" => nil,
       "compiler" => "clang",
@@ -214,6 +217,10 @@ class Tab < OpenStruct
     source["spec"].to_sym
   end
 
+  def source_modified_time
+    Time.at(super)
+  end
+
   def to_json
     attributes = {
       "used_options" => used_options.as_flags,
@@ -221,6 +228,7 @@ class Tab < OpenStruct
       "built_as_bottle" => built_as_bottle,
       "poured_from_bottle" => poured_from_bottle,
       "time" => time,
+      "source_modified_time" => source_modified_time.to_i,
       "HEAD" => self.HEAD,
       "stdlib" => (stdlib.to_s if stdlib),
       "compiler" => (compiler.to_s if compiler),
diff --git a/Library/Homebrew/test/test_tab.rb b/Library/Homebrew/test/test_tab.rb
index f8c36fd4eb..91d70e705b 100644
--- a/Library/Homebrew/test/test_tab.rb
+++ b/Library/Homebrew/test/test_tab.rb
@@ -7,15 +7,16 @@ class TabTests < Homebrew::TestCase
     @used = Options.create(%w[--with-foo --without-bar])
     @unused = Options.create(%w[--with-baz --without-qux])
 
-    @tab = Tab.new("used_options"       => @used.as_flags,
-                   "unused_options"     => @unused.as_flags,
-                   "built_as_bottle"    => false,
-                   "poured_from_bottle" => true,
-                   "time"               => nil,
-                   "HEAD"               => TEST_SHA1,
-                   "compiler"           => "clang",
-                   "stdlib"             => "libcxx",
-                   "source"             => {
+    @tab = Tab.new("used_options"         => @used.as_flags,
+                   "unused_options"       => @unused.as_flags,
+                   "built_as_bottle"      => false,
+                   "poured_from_bottle"   => true,
+                   "time"                 => nil,
+                   "source_modified_time" => 0,
+                   "HEAD"                 => TEST_SHA1,
+                   "compiler"             => "clang",
+                   "stdlib"               => "libcxx",
+                   "source"               => {
                      "tap" => "Homebrew/homebrew",
                      "path" => nil,
                      "spec" => "stable"