Only allow --interactive with one formula argument

See comments in commit for details.

2 files changed, 4 insertions, 1 deletions

diff --git a/Library/Homebrew/ARGV+yeast.rb b/Library/Homebrew/ARGV+yeast.rb
index e602d7901..007de9f4c 100644
--- a/Library/Homebrew/ARGV+yeast.rb
+++ b/Library/Homebrew/ARGV+yeast.rb
@@ -66,6 +66,9 @@ module HomebrewArgvExtension
   def quieter?
     flag? '--quieter'
   end
+  def interactive?
+    flag? '--interactive'
+  end
 
   def flag? flag
     options.each do |arg|
diff --git a/Library/Homebrew/brew.h.rb b/Library/Homebrew/brew.h.rb
index de5048cc3..875f61be0 100644
--- a/Library/Homebrew/brew.h.rb
+++ b/Library/Homebrew/brew.h.rb
@@ -174,7 +174,7 @@ end
 
 def install f
   f.brew do
-    if ARGV.flag? '--interactive'
+    if ARGV.interactive?
       ohai "Entering interactive mode"
       puts "Type `exit' to return and finalize the installation"
       puts "Install to this prefix: #{f.prefix}"