diff --git a/History.rdoc b/History.rdoc
index 8c3bdf6..1842107 100644
--- a/History.rdoc
+++ b/History.rdoc
@@ -1,3 +1,15 @@
+=== 4.7.0 / 2019-04-23
+
+* 7 minor enhancements:
+
+ * Modified Flog#flog to expand directories in its arguments into files
+ * Modified FlogCLI::run to use Flog#flog to expand directories into files
+ * Modified test_flog.rb to test expansion of dirs to files.
+ * Modified usage message of FlogCli to show standard input case.
+ * flog_cli.rb uses require_relative such that tests don't used an installed gem file.
+ * bin/flog uses require_relative such that tests don't used an installed gem file.
+ * Modified bin/flog to use /usr/bin/env to select the ruby interpreter.
+
 === 4.6.2 / 2018-02-14
 
 * 1 bug fix:
diff --git a/bin/flog b/bin/flog
index 8f10030..50b1feb 100755
--- a/bin/flog
+++ b/bin/flog
@@ -1,6 +1,6 @@
-#!/usr/local/bin/ruby -w
+#!/usr/bin/env ruby -w
 
-require "flog_cli"
+require_relative File.join("..", "lib", "flog_cli")
 
 FlogCLI.run
 
diff --git a/lib/flog.rb b/lib/flog.rb
index 1ae537b..16b3a7a 100644
--- a/lib/flog.rb
+++ b/lib/flog.rb
@@ -1,6 +1,7 @@
 require "sexp_processor"
 require "ruby_parser"
 require "timeout"
+require 'path_expander'
 
 class File
   RUBY19 = "<3".respond_to? :encoding unless defined? RUBY19 # :nodoc:
@@ -11,7 +12,7 @@ class << self
 end
 
 class Flog < MethodBasedSexpProcessor
-  VERSION = "4.6.2" # :nodoc:
+  VERSION = "4.7.0" # :nodoc:
 
   ##
   # Cut off point where the report should stop unless --all given.
@@ -167,22 +168,33 @@ def each_by_score max = nil
     end
   end
 
-  ##
+  #
   # Flog the given files. Deals with "-", and syntax errors.
   #
-  # Not as smart as FlogCLI's #flog method as it doesn't traverse
-  # dirs. Use PathExpander to expand dirs into files.
+  def expand_file(file)
+    expander = PathExpander.new [file], "**/*.{rb,rake}"
+    expander.process
+  end
 
+  # NOW as smart as FlogCLI's #flog method as it traverses
+  # dirs using PathExpander.
   def flog(*files)
+    flogged = false
     files.each do |file|
-      next unless file == '-' or File.readable? file
-
-      ruby = file == '-' ? $stdin.read : File.binread(file)
-
-      flog_ruby ruby, file
+      if file == '-'
+        flog_ruby $stdin.read, file
+        flogged = true
+      else
+        expand_file(file).each do |elem|
+          next unless File.readable? elem
+          flogged = true
+          flog_ruby File.binread(elem), elem
+        end
+      end
     end
 
     calculate_total_scores
+    flogged
   end
 
   ##
diff --git a/lib/flog_cli.rb b/lib/flog_cli.rb
index 3853635..56024ef 100644
--- a/lib/flog_cli.rb
+++ b/lib/flog_cli.rb
@@ -2,8 +2,7 @@
 require "optparse"
 require "forwardable"
 
-require "path_expander"
-require "flog"
+require_relative "flog"
 
 class FlogCLI
   extend Forwardable
@@ -16,16 +15,14 @@ class FlogCLI
   def self.run args = ARGV
     load_plugins
 
-    expander = PathExpander.new args, "**/*.{rb,rake}"
-    files = expander.process
-
     options = parse_options args
 
-    abort "no files or stdin (-) to process, aborting." if
-      files.empty? and args.empty?
+    abort "no files or stdin (-) to process, aborting." if args.empty?
 
     flogger = new options
-    flogger.flog(*files)
+    unless flogger.flog(*args)
+      abort "no readable source files to process, aborting."
+    end
     flogger.report
   end
 
@@ -74,6 +71,12 @@ def self.parse_options args = ARGV
     }
 
     OptionParser.new do |opts|
+      opts.banner =
+          "\nUsage:" \
+          "\n       flog [options] - # to read stdin." \
+          "\nor," \
+          "\n       flog [options] dir_or_file(s)\n\n"
+
       opts.separator "Standard options:"
 
       opts.on("-a", "--all", "Display all flog results, not top 60%.") do
@@ -154,8 +157,8 @@ def self.plugins
 
   ##
   # Flog the given files. Deals with "-", syntax errors, and
-  # traversing subdirectories intelligently. Use PathExpander to
-  # process dirs into files.
+  # traversing subdirectories intelligently. PathExpander is used
+  # by Flog#flog to process dirs into files.
 
   def flog(*files)
     files << "-" if files.empty?
diff --git a/test/test_flog.rb b/test/test_flog.rb
index e947580..75794b0 100644
--- a/test/test_flog.rb
+++ b/test/test_flog.rb
@@ -1,5 +1,8 @@
 require "minitest/autorun"
 require "flog"
+require 'tempfile'
+require 'tmpdir'
+
 
 class Flog
   attr_writer :calls
@@ -625,6 +628,56 @@ def bleh n
     assert_equal(expected, @flog.method_scores)
   end
 
+  def test_flog_with_path_expander
+    account = %(
+      module User
+        class Account
+          def blah n
+            puts "blah" * n
+          end
+        end
+      end
+    )
+    profile = %(
+      module User
+        class Profile
+          def bleh n
+            puts "bleh" * n
+          end
+        end
+      end
+    )
+
+    # Lambda to make a temporary data file called 'name' in directory named 'where'
+    # with contents of 'data'
+    temp_data = -> (name, where, data) {
+      file = Tempfile.new([name, '.rb'], where)
+      file << data
+      file.close
+      file.open
+    }
+
+    # Make a temporary dir with account data
+    Dir.mktmpdir() { |dir|
+      temp_data.call('dir', dir.to_s, account)
+      # Make a a temporary subdirectory of dir with profile data
+      Dir.mktmpdir(nil, dir) { |sub_dir|
+        temp_data.call('sub_dir', sub_dir.to_s, profile)
+        Dir.chdir(dir) {
+          # tell flog to process from the temporary dir downward
+          @flog.flog dir.to_s
+        }
+      }
+    }
+    @flog.calculate
+
+    expected = {
+      "User::Account"=>[["User::Account#blah", 2.2]],
+      "User::Profile"=>[["User::Profile#bleh", 2.2]]
+    }
+    assert_equal(expected, @flog.method_scores)
+  end
+
   def setup_my_klass
     @flog.class_stack  << "Base" << "MyKlass"
     @flog.method_stack << "mymethod"