1 files changed, 56 insertions, 0 deletions
diff --git a/Library/Homebrew/compat/macos.rb b/Library/Homebrew/compat/macos.rb
new file mode 100644
index 000000000..2b3cb9d81
--- /dev/null
+++ b/Library/Homebrew/compat/macos.rb
@@ -0,0 +1,56 @@
+module MacOS
+  def xcode_folder
+    Xcode.folder
+  end
+
+  def xcode_prefix
+    Xcode.prefix
+  end
+
+  def xcode_installed?
+    Xcode.installed?
+  end
+
+  def xcode_version
+    Xcode.version
+  end
+
+  def clt_installed?
+    CLT.installed?
+  end
+
+  def clt_version?
+    CLT.version
+  end
+
+  def x11_installed?
+    X11.installed?
+  end
+
+  def x11_prefix
+    X11.prefix
+  end
+
+  def leopard?
+    version == 10.5
+  end
+
+  def snow_leopard?
+    version >= 10.6
+  end
+  alias_method :snow_leopard_or_newer?, :snow_leopard?
+
+  def lion?
+    version >= 10.7
+  end
+  alias_method :lion_or_newer?, :lion?
+
+  def mountain_lion?
+    version >= 10.8
+  end
+  alias_method :mountain_lion_or_newer?, :mountain_lion?
+
+  def macports_or_fink_installed?
+    not MacOS.macports_or_fink.empty?
+  end
+end