Remove readline and zlib hacks

Library/Homebrew/debrew.rb

@@ -1,4 +1,5 @@
 require "mutex_m"
+require "debrew/irb"
 
 module Debrew
   extend Mutex_m
@@ -120,9 +121,6 @@ module Debrew
           menu.choice(:ignore) { return :ignore } if Ignorable === e
           menu.choice(:backtrace) { puts e.backtrace }
 
-          unless ENV["HOMEBREW_NO_READLINE"]
-            require "debrew/irb"
-
           menu.choice(:irb) do
             puts "When you exit this IRB session, execution will continue."
             set_trace_func proc { |event, _, _, id, binding, klass|
@@ -134,7 +132,6 @@ module Debrew
 
             return :ignore
           end if Ignorable === e
-          end
 
           menu.choice(:shell) do
             puts "When you exit this shell, you will return to the menu."

Library/Homebrew/formula_installer.rb

@@ -190,14 +190,6 @@ class FormulaInstaller
     opoo "Nothing was installed to #{formula.prefix}" unless formula.installed?
   end
 
-  # HACK: If readline is present in the dependency tree, it will clash
-  # with the stdlib's Readline module when the debugger is loaded
-  def perform_readline_hack
-    if (formula.recursive_dependencies.any? { |d| d.name == "readline" } || formula.name == "readline") && debug?
-      ENV['HOMEBREW_NO_READLINE'] = '1'
-    end
-  end
-
   def check_conflicts
     return if ARGV.force?
 
@@ -210,8 +202,6 @@ class FormulaInstaller
   end
 
   def compute_and_install_dependencies
-    perform_readline_hack
-
     req_map, req_deps = expand_requirements
 
     check_requirements(req_map)

Library/Homebrew/utils.rb

@@ -314,7 +314,7 @@ module GitHub extend self
     # This is a no-op if the user is opting out of using the GitHub API.
     return if ENV['HOMEBREW_NO_GITHUB_API']
 
-    safely_load_net_https
+    require "net/https"
 
     default_headers = {
       "User-Agent" => HOMEBREW_USER_AGENT,
@@ -411,24 +411,4 @@ module GitHub extend self
     uri = URI.parse("https://api.github.com/repos/#{user}/#{repo}")
     open(uri) { |json| json["private"] }
   end
-
-  private
-
-  # If the zlib formula is loaded, TypeError will be raised when we try to load
-  # net/https. This monkeypatch prevents that and lets Net::HTTP fall back to
-  # the non-gzip codepath.
-  def safely_load_net_https
-    return if defined?(Net::HTTP)
-    if defined?(Zlib) && RUBY_VERSION >= "1.9"
-      require "net/protocol"
-      http = Class.new(Net::Protocol) do
-        def self.require(lib)
-          raise LoadError if lib == "zlib"
-          super
-        end
-      end
-      Net.const_set(:HTTP, http)
-    end
-    require "net/https"
-  end
 end