capistrano_redmine.rb

# -*- encoding: utf-8 -*-
require 'httparty'

class RemoteRedmine
  include HTTParty

  def initialize(cap)
    raise ArgumentError, 'Please set your redmine settings' if !cap[:redmine]
    self.class.base_uri cap[:redmine][:url]
    self.class.default_params :key => cap[:redmine][:access_key]
  end

  def get_issue_subject(issue_id)
   res = self.class.get("/issues/#{issue_id}.json").parsed_response
   res ? res['subject'] : '(no issue found with this id)'
  end

  def update_issue(issue_id, issue)
    self.class.put("/issues/#{issue_id}.json", :query => {:issue => issue})
  end

end

if Object.const_defined?("Capistrano")

  Capistrano::Configuration.instance(:must_exist).load do

    namespace :redmine do
      desc 'update issue status of redmine with your deployment, by #nnn in commit comments.'
      task :update_issue_status, :roles => :app do
        unless previous_revision == current_revision
          rm = RemoteRedmine.new(self)
          issues = `git log #{previous_revision}..#{current_revision}`.grep(/(fixes|refs) #([0-9]*)/){$2}.flatten

          puts ''
          puts ' ------------------------------------------------------------'
          puts '                  ** deployed tickets **                     '
          puts ' ------------------------------------------------------------'
          issues.each do |issue_id|
            rm.update_issue(issue_id, :status_id => self[:redmine][:deployed])
            puts "   * ##{issue_id.to_s}: #{rm.get_issue_subject(issue_id)}"
          end
          puts ''

        end
      end
    end
  end
end