rake stats dynamically scales now

So it can properly show stats for an app with 1,000,000+ LOC

railties/lib/rails/code_statistics.rb

@@ -9,6 +9,8 @@ class CodeStatistics #:nodoc:
                 'Job tests',
                 'Integration tests']
 
+  HEADERS = {lines: ' Lines', code_lines: '   LOC', classes: 'Classes', methods: 'Methods'}
+
   def initialize(*pairs)
     @pairs      = pairs
     @statistics = calculate_statistics
@@ -67,27 +69,37 @@ class CodeStatistics #:nodoc:
       test_loc
     end
 
+    def width_for(label)
+      [@statistics.values.sum {|s| s.send(label) }.to_s.size, HEADERS[label].length].max
+    end
+
     def print_header
       print_splitter
-      puts "| Name                 | Lines |   LOC | Classes | Methods | M/C | LOC/M |"
+      print '| Name                '
+      HEADERS.each do |k, v|
+        print " | #{v.rjust(width_for(k))}"
+      end
+      puts ' | M/C | LOC/M |'
       print_splitter
     end
 
     def print_splitter
-      puts "+----------------------+-------+-------+---------+---------+-----+-------+"
+      print '+----------------------'
+      HEADERS.each_key do |k|
+        print "+#{'-' * (width_for(k) + 2)}"
+      end
+      puts '+-----+-------+'
     end
 
     def print_line(name, statistics)
       m_over_c   = (statistics.methods / statistics.classes) rescue m_over_c = 0
       loc_over_m = (statistics.code_lines / statistics.methods) - 2 rescue loc_over_m = 0
 
-      puts "| #{name.ljust(20)} " \
-           "| #{statistics.lines.to_s.rjust(5)} " \
-           "| #{statistics.code_lines.to_s.rjust(5)} " \
-           "| #{statistics.classes.to_s.rjust(7)} " \
-           "| #{statistics.methods.to_s.rjust(7)} " \
-           "| #{m_over_c.to_s.rjust(3)} " \
-           "| #{loc_over_m.to_s.rjust(5)} |"
+      print "| #{name.ljust(20)} "
+      HEADERS.each_key do |k|
+        print "| #{statistics.send(k).to_s.rjust(width_for(k))} "
+      end
+      puts "| #{m_over_c.to_s.rjust(3)} | #{loc_over_m.to_s.rjust(5)} |"
     end
 
     def print_code_test_stats