# frozen_string_literal: true

module Nanoc
  module Deploying
    module Deployers
      # A deployer that deploys a site using rsync.
      #
      # The configuration has should include a `:dst` value, a string containing
      # the destination to where rsync should upload its data. It will likely be
      # in `host:path` format. It should not end with a slash. For example,
      # `"example.com:/var/www/sites/mysite/html"`.
      #
      # @example A deployment configuration with public and staging configurations
      #
      #   deploy:
      #     public:
      #       kind: rsync
      #       dst: "ectype:sites/stoneship/public"
      #     staging:
      #       kind: rsync
      #       dst: "ectype:sites/stoneship-staging/public"
      #       options: [ "-glpPrtvz" ]
      #
      # @api private
      class Rsync < ::Nanoc::Deploying::Deployer
        identifier :rsync

        # Default rsync options
        DEFAULT_OPTIONS = [
          '--group',
          '--links',
          '--perms',
          '--partial',
          '--progress',
          '--recursive',
          '--times',
          '--verbose',
          '--compress',
          '--exclude=".hg"',
          '--exclude=".svn"',
          '--exclude=".git"',
        ].freeze

        # @see Nanoc::Deploying::Deployer#run
        def run
          # Get params
          src = source_path + '/'
          dst = config[:dst]
          options = config[:options] || DEFAULT_OPTIONS

          # Validate
          raise 'No dst found in deployment configuration' if dst.nil?
          raise 'dst requires no trailing slash' if dst[-1, 1] == '/'

          # Run
          if dry_run
            warn 'Performing a dry-run; no actions will actually be performed'
            run_shell_cmd(['echo', 'rsync', options, src, dst].flatten)
          else
            run_shell_cmd(['rsync', options, src, dst].flatten)
          end
        end

        private

        def run_shell_cmd(cmd)
          TTY::Command.new(printer: :null).run(*cmd)
        end
      end
    end
  end
end
