From 4101cef3c5e167daee6a6189e34546619c510dd3 Mon Sep 17 00:00:00 2001
From: Xu Cheng
Date: Sat, 13 Jun 2015 01:57:00 +0800
Subject: Tap: make remote a separate method to reduce initial overhead

Also make remote method only response to installed tap.
---
 Library/Homebrew/cmd/tap-info.rb |  2 +-
 Library/Homebrew/cmd/tap.rb      |  5 +++--
 Library/Homebrew/tap.rb          | 23 +++++++++++++++--------
 3 files changed, 19 insertions(+), 11 deletions(-)

(limited to 'Library')

diff --git a/Library/Homebrew/cmd/tap-info.rb b/Library/Homebrew/cmd/tap-info.rb
index e05b9eb08..cd3f82109 100644
--- a/Library/Homebrew/cmd/tap-info.rb
+++ b/Library/Homebrew/cmd/tap-info.rb
@@ -48,7 +48,7 @@ module Homebrew
           info += "Not installed"
         end
         puts info
-        puts "From: #{tap.remote}"
+        puts "From: #{tap.remote.nil? ? "N/A" : tap.remote}"
       end
     end
   end
diff --git a/Library/Homebrew/cmd/tap.rb b/Library/Homebrew/cmd/tap.rb
index 3a0a1156b..43e47711e 100644
--- a/Library/Homebrew/cmd/tap.rb
+++ b/Library/Homebrew/cmd/tap.rb
@@ -14,10 +14,11 @@ module Homebrew
   end
 
   def install_tap user, repo, clone_target=nil
-    tap = Tap.new user, repo, clone_target
+    tap = Tap.new user, repo
     return false if tap.installed?
     ohai "Tapping #{tap}"
-    args = %W[clone #{tap.remote} #{tap.path}]
+    remote = clone_target || "https://github.com/#{tap.user}/homebrew-#{tap.repo}"
+    args = %W[clone #{remote} #{tap.path}]
     args << "--depth=1" unless ARGV.include?("--full")
     safe_system "git", *args
 
diff --git a/Library/Homebrew/tap.rb b/Library/Homebrew/tap.rb
index 92f02fc06..f8200dac2 100644
--- a/Library/Homebrew/tap.rb
+++ b/Library/Homebrew/tap.rb
@@ -7,20 +7,26 @@ class Tap
   attr_reader :repo
   attr_reader :name
   attr_reader :path
-  attr_reader :remote
 
-  def initialize(user, repo, remote=nil)
+  def initialize(user, repo)
     # we special case homebrew so users don't have to shift in a terminal
     @user = user == "homebrew" ? "Homebrew" : user
     @repo = repo
     @name = "#{@user}/#{@repo}".downcase
     @path = TAP_DIRECTORY/"#{@user}/homebrew-#{@repo}".downcase
-    if installed?
-      @path.cd do
-        @remote = Utils.popen_read("git", "config", "--get", "remote.origin.url").chomp
+  end
+
+  def remote
+    @remote ||= if installed?
+      if (@path/".git").exist?
+        @path.cd do
+          Utils.popen_read("git", "config", "--get", "remote.origin.url").chomp
+        end
+      else
+        nil
       end
     else
-      @remote = remote || "https://github.com/#{@user}/homebrew-#{@repo}"
+      raise TapUnavailableError, name
     end
   end
 
@@ -46,7 +52,8 @@ class Tap
   end
 
   def custom_remote?
-    @remote.casecmp("https://github.com/#{@user}/homebrew-#{@repo}") != 0
+    return true unless remote
+    remote.casecmp("https://github.com/#{@user}/homebrew-#{@repo}") != 0
   end
 
   def formula_files
@@ -69,7 +76,7 @@ class Tap
       "user" => @user,
       "repo" => @repo,
       "path" => @path.to_s,
-      "remote" => @remote,
+      "remote" => remote,
       "installed" => installed?,
       "official" => official?,
       "custom_remote" => custom_remote?,
-- 
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