1 files changed, 12 insertions, 1 deletions
diff --git a/Library/Homebrew/requirements.rb b/Library/Homebrew/requirements.rb
index 35a0c242c..d5992b88d 100644
--- a/Library/Homebrew/requirements.rb
+++ b/Library/Homebrew/requirements.rb
@@ -114,10 +114,15 @@ class ArchRequirement < Requirement
   end
 end
 
+class CVSRequirement < Requirement
+  fatal true
+  default_formula "cvs"
+  satisfy { which "cvs" }
+end
+
 class MercurialRequirement < Requirement
   fatal true
   default_formula "mercurial"
-
   satisfy { which("hg") }
 end
 
@@ -126,3 +131,9 @@ class GitRequirement < Requirement
   default_formula "git"
   satisfy { Utils.git_available? }
 end
+
+class SubversionRequirement < Requirement
+  fatal true
+  default_formula "subversion"
+  satisfy { Utils.svn_available? }
+end