Make readme generator more flexible

src/main/ruby/generate_readme.sh

@@ -3,8 +3,17 @@
 base_dir = File.join(File.dirname(__FILE__),'../../..')
 src_dir = File.join(base_dir, "/src/main/asciidoc")
 require File.join(File.dirname(__FILE__), 'readme.rb')
+require 'optparse'
 
 options = {}
-ARGV.length > 0 and options[:to_file] = ARGV[0]
+input = "#{src_dir}/README.adoc"
 
-SpringCloud::Build.render_file("#{src_dir}/README.adoc", options)
+OptionParser.new do |o|
+  o.on('-o OUTPUT_FILE', 'Output file (default is stdout)') { |file| options[:to_file] = file unless file=='-' }
+  o.on('-h', '--help') { puts o; exit }
+  o.parse!
+end
+
+input = ARGV[0] if ARGV.length>0
+
+SpringCloud::Build.render_file(input, options)

src/main/ruby/readme.rb

@@ -1,3 +1,5 @@
+require 'open-uri'
+
 module SpringCloud
   module Build
 
@@ -6,13 +8,13 @@ module SpringCloud
     class << self
 
       def process_include out, src, target, attrs
-        unless target.start_with?('/')
-          target = File.new(File.join(src, target))
-        else
-          target = File.new(target)
+        unless target.include?(':') || target.start_with?('/')
+          target = File.join(src, target)
         end
-        target.each do |line|
-          self.process(out, File.dirname(target), line)
+        open(target) do |file|
+            file.each do |line|
+            self.process(out, File.dirname(target), line)
+          end
         end
       end