add new tag to a list of objects

addTagScript.rb

#!/usr/bin/env ruby
# script should be placed in the common-accessioning/current/bin directory
# usage is ruby addTagScript.rb {env} druid-list.txt
# where {env} is the environment in which you want to run the script (production, test, development)
# and druid-list.txt is the list of druids you want to add tags to.
# NOTE: you need to change the tag, right now its set to add 'Project : Chinese Topographic Maps'
 
unless(ARGV.first.nil?)
  ENV['ROBOT_ENVIRONMENT'] = ARGV.first
end
 
require File.expand_path(File.dirname(__FILE__) + '/../config/boot')
 
#pull the file from the commandline argument and read each line into the druids array
druids = []
druidlist = File.open(ARGV.second)
druidlist.each_line {|line|
  druids.push line.chomp
}
 
druids.each do |druid|
  begin
    #format the druids
    druid = "druid:#{druid}" unless druid.start_with?('druid')
    #make sure that they exist in dor
    @object=Dor::Item.find(druid)
    #add the new tag and save
    #TO DO: add the tag via a commandline argument, not hardcoded
    @object.add_tag('Project : Chinese Topographic Maps')
    @object.save
    puts "completed #{druid}"
# TO DO: need to rescue error messages  
#  rescue
#    RuntimeError => msg
#    puts "#{druid}, #{msg}"
  end
end
puts "Done!"