lib/rdiff_simple.rb in rdiff-simple-0.0.3 vs lib/rdiff_simple.rb in rdiff-simple-0.0.4

@@ -1,15 +1,30 @@
 require "rdiff_simple/version"
+
+module RdiffSimple
+
+  class NotInstalledError < Exception; end
+
+  def self.execute(*args)
+    raise NotInstalledError, 'rdiff-backup not installed' unless installed?
+
+    system('rdiff-backup', *args)
+  end
+
+  def self.installed?
+    system('which rdiff-backup')
+  end
+end