bin/destroy in loremarkov-0.0.0.3 vs bin/destroy in loremarkov-0.0.0.4

@@ -6,10 +6,29 @@
   exit 1
 end
 
 require 'loremarkov'
 
-filename = ARGV.first or usage "provide an input file"
-num_prefixes = ARGV[1] ? ARGV[1].to_i : 5
-text = File.read(filename)
+# accept text from STDIN or filename
+#
+if $stdin.tty?
+  # from file or sample
+  filename = ARGV.shift || 'lorem_ipsum'
+  unless File.exists?(filename)
+    filename = File.join(__dir__, '..', 'text', filename)
+  end
+  raise("unknown file: #{filename}:") unless File.exists?(filename)
+  text = File.read(filename)
+else
+  # from STDIN
+  text = $stdin.read
+end
 
+
+# destruction parameter engage (default 5)
+#
+num_prefixes = ARGV.shift
+num_prefixes = num_prefixes ? 5 : num_prefixes.to_i
+
+# DESTROY!!!!!
+#
 puts Loremarkov.new(num_prefixes).destroy text