Added migration script

migrate.rb

@@ -0,0 +1,42 @@
+require "couchrest"
+require 'optparse'
+
+class Options
+
+  def self.parse(args) 
+    options = OpenStruct.new
+    opt_parser = OptionParser.new do |opts| 
+      opts.banner = "Usage: migrate.rb [options]"
+      opts.on('-s', '--source HOST', 'Source HOST endpoint') { |v| options.source = v }
+      opts.on('-i', '--source-db NAME', 'Source database NAME') { |v| options.source_db = v }
+      opts.on('-t', '--target HOST', 'Target HOST endpoint') { |v| options.target = v }
+      opts.on('-o', '--target-db NAME', 'Target database NAME') { |v| options.target_db = v }
+      if options[:source].nil? then options[:source] = "http://localhost:5984" end
+      if options.target.nil? then options.target = "http://localhost:5984" end
+    end
+    opt_parser.parse!(args)
+    options
+  end
+
+end
+
+def migrate(options) 
+  docs = CouchRest.get(options.source+"/"+ options.source_db+"/_all_docs?include_docs=true")
+  db_target = CouchRest.new(options.target).database(options.target_db)
+  docs["rows"].each do |row|
+    row["doc"].delete("_rev")
+    if (!row["id"].start_with?("_")) 
+      begin 
+        db_target.save_doc(row["doc"]);
+      rescue  => exception
+        puts "Eror while saving #{row["doc"]}"
+        puts exception
+      end
+    end
+  end
+end
+
+options = Options.parse(ARGV)
+puts options
+migrate(options)
+