1 files changed, 21 insertions, 0 deletions
diff --git a/Library/Homebrew/extend/ENV.rb b/Library/Homebrew/extend/ENV.rb
index 41850fef8..5e35bace5 100644
--- a/Library/Homebrew/extend/ENV.rb
+++ b/Library/Homebrew/extend/ENV.rb
@@ -1,4 +1,25 @@
 require 'hardware'
+require 'superenv'
+
+def superenv?
+  return false if MacOS::Xcode.without_clt? && MacOS.sdk_path.nil?
+  return false unless Superenv.bin && Superenv.bin.directory?
+  return false if ARGV.include? "--env=std"
+  true
+end
+
+module EnvActivation
+  def activate_extensions!
+    if superenv?
+      extend(Superenv)
+    else
+      extend(HomebrewEnvExtension)
+      prepend 'PATH', "#{HOMEBREW_PREFIX}/bin", ':' unless ORIGINAL_PATHS.include? HOMEBREW_PREFIX/'bin'
+    end
+  end
+end
+
+ENV.extend(EnvActivation)
 
 module HomebrewEnvExtension
   SAFE_CFLAGS_FLAGS = "-w -pipe"