Class: Hem::Lib::S3::Sync

Inherits:
Object
  • Object
show all
Includes:
Hem::Logging
Defined in:
lib/hem/lib/s3/sync.rb

Instance Method Summary collapse

Methods included from Hem::Logging

#logger, logger

Constructor Details

#initialize(opts = {}) ⇒ Sync 



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# File 'lib/hem/lib/s3/sync.rb', line 7

def initialize opts = {}
  require 'aws-sdk'

  @opts = {
    :access_key_id => nil,
    :secret_access_key => nil,
    :region => 'eu-west-1',
    :retry_limit => 15
  }.merge(opts)

  if Hem.windows?
    Aws.config[:ssl_ca_bundle] = File.expand_path('../../../../../ssl/ca-bundle-s3.crt', __FILE__)
  end

  handle_s3_error do
    # AWS::S3 is flakey about actually raising this error when nil is provided
    [:access_key_id, :secret_access_key].each do |k|
      raise Aws::Errors::MissingCredentialsError if @opts[k].nil?
    end
  end

  logger.debug("s3sync: Options #{@opts}")
end

Instance Method Details

#sync(source, dest, opts = {}) ⇒ Object 



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# File 'lib/hem/lib/s3/sync.rb', line 31

def sync source, dest, opts = {}
  delta = {:add => [], :remove => []}

  handle_s3_error do
    opts = {
      :delete => true,
      :dry => false,
      :progress => Hem.method(:progress)
    }.merge(opts)

    source_io = io_handler(source)
    destination_io = io_handler(dest)

    logger.debug("s3sync: Synchronzing (#{source_io.class.name} -> #{destination_io.class.name}")

    raise "S3 -> S3 synchronisation not supported" if source_io.is_a? Remote and destination_io.is_a? Remote

    source_listing = source_io.ls
    destination_listing = destination_io.ls
    logger.debug("s3sync: Source listing - #{source_listing}")
    logger.debug("s3sync: Destination listing - #{destination_listing}")

    delta = delta(source_listing, destination_listing)
    logger.debug("s3sync: Delta #{delta}")
    break if opts[:dry]

    delta[:add].each do |file|
      logger.debug("s3sync: Synchronizing #{file}")
      source_file = source_io.open(file, "r")
      destination_file = destination_io.open(file, "wb+")

      source_file.buffer

      size = source_file.size
      destination_file.copy_from(source_file.read_io, :content_length => size) do |chunk|
        opts[:progress].call(file, (chunk || '').length, size, :update)
      end

      destination_file.close
      source_file.close

      opts[:progress].call(file, 0, size, :finish)
    end
    break unless opts[:delete]

    delta[:remove].each do |file|
      logger.debug("s3sync: Removing #{file}")
      destination_io.rm(file)
    end
  end

  return delta
end