Capistrano3 で deploy_via :copy する ref: http://qiita.com/hidakatsuya/items/4d097416516afc229199

Capifile

$:.unshift File.expand_path(File.dirname(__FILE__) + '/lib') # << 必ず先頭に追加

# Load DSL and Setup Up Stages
require 'capistrano/setup'

# Includes default deployment tasks
require 'capistrano/deploy'
#    :
# Loads custom tasks from `lib/capistrano/tasks' if you have any defined.
Dir.glob('lib/capistrano/tasks/*.cap').each { |r| import r }

copy.rb

require 'zip'

Zip.setup do |c|
  c.unicode_names = true
  c.on_exists_proc = true
  c.continue_on_exists_proc = true
end

namespace :copy do
  task :check do
  end

  task create_release: 'release.zip' do |t|
    file = t.prerequisites.first
    on roles(:app) do
      execute :mkdir, '-p', fetch(:tmp_dir)
      upload! file, fetch(:tmp_dir)
      execute :unzip, '-o', "#{fetch(:tmp_dir)}/release.zip", '-d', release_path
    end
    File.delete file if File.exists?(file)
  end

  file 'release.zip' do |t|
    release_filename = File.join(Dir.pwd, t.name)

    Dir.chdir fetch(:copy_dir) do
      Zip::File.open(release_filename, Zip::File::CREATE) do |zipfile|
        files = FileList['**/*']
        files.exclude(*fetch(:copy_exclude)).each do |file|
          zipfile.add(file, file)
        end
      end
    end
  end
end

deploy.rb

set :scm, 'copy'
set :copy_dir, '.'
set :tmp_dir, '/tmp'
set :copy_exclude, [ /\.log$/, %r!^files/.+! ]

file1.txt

config/
  deploy/
    production.rb
    staging.rb
  deploy.rb
lib/
  capistrano/
    tasks/
Capifile

file3.txt

config/
  deploy/
    production.rb
    staging.rb
  deploy.rb
lib/
  capistrano/
    tasks/
    copy.rb << Add to here!
Capifile

Gemfile

group :deployment do
  gem 'capistrano', '~> 3.0', require: false
  gem 'rubyzip', require: false
end