Merge pull request #40 from znz/reduce-global_variables

Reduce global variables

Author: hsbt

lib/fileutils.rb

@@ -1516,14 +1516,14 @@ def wrap_traverse(pre, post)
 
     private
 
-    $fileutils_rb_have_lchmod = nil
+    @@fileutils_rb_have_lchmod = nil
 
     def have_lchmod?
       # This is not MT-safe, but it does not matter.
-      if $fileutils_rb_have_lchmod == nil
-        $fileutils_rb_have_lchmod = check_have_lchmod?
+      if @@fileutils_rb_have_lchmod == nil
+        @@fileutils_rb_have_lchmod = check_have_lchmod?
       end
-      $fileutils_rb_have_lchmod
+      @@fileutils_rb_have_lchmod
     end
 
     def check_have_lchmod?
@@ -1534,14 +1534,14 @@ def check_have_lchmod?
       return false
     end
 
-    $fileutils_rb_have_lchown = nil
+    @@fileutils_rb_have_lchown = nil
 
     def have_lchown?
       # This is not MT-safe, but it does not matter.
-      if $fileutils_rb_have_lchown == nil
-        $fileutils_rb_have_lchown = check_have_lchown?
+      if @@fileutils_rb_have_lchown == nil
+        @@fileutils_rb_have_lchown = check_have_lchown?
       end
-      $fileutils_rb_have_lchown
+      @@fileutils_rb_have_lchown
     end
 
     def check_have_lchown?