1 files changed, 25 insertions, 0 deletions
diff --git a/Library/Homebrew/extend/string.rb b/Library/Homebrew/extend/string.rb
index 23fea8b2c..57630a701 100644
--- a/Library/Homebrew/extend/string.rb
+++ b/Library/Homebrew/extend/string.rb
@@ -3,3 +3,28 @@ class String
     gsub(/^.{#{slice(/^ +/).length}}/, '')
   end
 end
+
+# used by the inreplace function (in utils.rb)
+module StringInreplaceExtension
+  # Looks for Makefile style variable defintions and replaces the
+  # value with "new_value", or removes the definition entirely.
+  def change_make_var! flag, new_value
+    new_value = "#{flag}=#{new_value}"
+    gsub! Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$"), new_value
+  end
+
+  # Removes variable assignments completely.
+  def remove_make_var! flags
+    flags.each do |flag|
+      # Also remove trailing \n, if present.
+      gsub! Regexp.new("^#{flag}[ \\t]*=(.*)$\n?"), ""
+    end
+  end
+
+  # Finds the specified variable
+  def get_make_var flag
+    m = match Regexp.new("^#{flag}[ \\t]*=[ \\t]*(.*)$")
+    return m[1] if m
+    return nil
+  end
+end