Merge branch '119-remove-gitlab-reference-counter' into 'master'

Remove direct redis integration

Closes #119

See merge request gitlab-org/gitlab-shell!181

28 files changed, 35 insertions, 5830 deletions

diff --git a/Makefile b/Makefile
deleted file mode 100644
index b4fd50a..0000000
--- a/Makefile
+++ /dev/null
@@ -1,12 +0,0 @@
-REDIS_RB_VERSION=v3.3.3
-REDIS_RB_VENDOR_DIR=lib/vendor/redis
-PWD=`pwd`
-
-all:
-
-update-redis:
-	rm -rf $(REDIS_RB_VENDOR_DIR)
-	git clone -b $(REDIS_RB_VERSION) https://github.com/redis/redis-rb.git $(REDIS_RB_VENDOR_DIR)
-	rm -rf $(REDIS_RB_VENDOR_DIR)/.git
-
-.PHONY=update-redis
diff --git a/bin/check b/bin/check
index 2eec54e..d2224a6 100755
--- a/bin/check
+++ b/bin/check
@@ -3,17 +3,6 @@
 require_relative '../lib/gitlab_init'
 require_relative '../lib/gitlab_net'
 
-def ping_redis
-  print "Send ping to redis server: "
-  if GitlabNet.new.redis_client.ping
-    print 'OK'
-  else
-    abort 'FAILED'
-  end
-
-  puts "\n"
-end
-
 #
 # GitLab shell check task
 #
@@ -30,15 +19,11 @@ begin
 
   check_values = JSON.parse(resp.body)
 
-  if check_values.key?('redis')
-    print 'Redis available via internal API: '
-    if check_values['redis']
-      puts 'OK'
-    else
-      abort 'FAILED'
-    end
+  print 'Redis available via internal API: '
+  if check_values['redis']
+    puts 'OK'
   else
-    ping_redis
+    abort 'FAILED'
   end
 rescue GitlabNet::ApiUnreachableError
   abort "FAILED: Failed to connect to internal API"
diff --git a/config.yml.example b/config.yml.example
index f631261..0fc8300 100644
--- a/config.yml.example
+++ b/config.yml.example
@@ -35,23 +35,6 @@ auth_file: "/home/git/.ssh/authorized_keys"
 # Default is hooks in the gitlab-shell directory.
 # custom_hooks_dir: "/home/git/gitlab-shell/hooks"
 
-# Redis settings used for pushing commit notices to gitlab
-redis:
-  # host: 127.0.0.1
-  # port: 6379
-  # pass: redispass # Allows you to specify the password for Redis
-  database: 0
-  socket: /var/run/redis/redis.sock # Comment out this line if you want to use TCP or Sentinel
-  namespace: resque:gitlab
-  # sentinels:
-  #   -
-  #     host: 127.0.0.1
-  #     port: 26380
-  #   -
-  #     host: 127.0.0.1
-  #     port: 26381
-
-
 # Log file.
 # Default is gitlab-shell.log in the root directory.
 # log_file: "/home/git/gitlab-shell/gitlab-shell.log"
diff --git a/hooks/pre-receive b/hooks/pre-receive
index d7fecc7..d113697 100755
--- a/hooks/pre-receive
+++ b/hooks/pre-receive
@@ -13,8 +13,6 @@ def increase_reference_counter(gl_repository, repo_path)
   result = GitlabNet.new.pre_receive(gl_repository)
 
   result['reference_counter_increased']
-rescue GitlabNet::NotFound
-  GitlabReferenceCounter.new(repo_path).increase
 end
 
 require_relative '../lib/gitlab_custom_hook'
diff --git a/lib/gitlab_config.rb b/lib/gitlab_config.rb
index fc9b348..e999a83 100644
--- a/lib/gitlab_config.rb
+++ b/lib/gitlab_config.rb
@@ -34,14 +34,6 @@ class GitlabConfig
     @config['http_settings'] ||= {}
   end
 
-  def redis
-    @config['redis'] ||= {}
-  end
-
-  def redis_namespace
-    redis['namespace'] || 'resque:gitlab'
-  end
-
   def log_file
     @config['log_file'] ||= File.join(ROOT_PATH, 'gitlab-shell.log')
   end
diff --git a/lib/gitlab_net.rb b/lib/gitlab_net.rb
index 34f10c5..924a784 100644
--- a/lib/gitlab_net.rb
+++ b/lib/gitlab_net.rb
@@ -5,7 +5,6 @@ require 'json'
 require_relative 'gitlab_config'
 require_relative 'gitlab_logger'
 require_relative 'gitlab_access'
-require_relative 'gitlab_redis'
 require_relative 'gitlab_lfs_authentication'
 require_relative 'httpunix'
 
@@ -140,30 +139,6 @@ class GitlabNet
     JSON.parse(resp.body) if resp.code == '200'
   end
 
-  def redis_client
-    redis_config = config.redis
-    database = redis_config['database'] || 0
-    params = {
-      host: redis_config['host'] || '127.0.0.1',
-      port: redis_config['port'] || 6379,
-      db: database
-    }
-
-    if redis_config.has_key?('sentinels')
-      params[:sentinels] = redis_config['sentinels']
-                           .select { |s| s['host'] && s['port'] }
-                           .map { |s| { host: s['host'], port: s['port'] } }
-    end
-
-    if redis_config.has_key?("socket")
-      params = { path: redis_config['socket'], db: database }
-    elsif redis_config.has_key?("pass")
-      params[:password] = redis_config['pass']
-    end
-
-    Redis.new(params)
-  end
-
   protected
 
   def sanitize_path(repo)
diff --git a/lib/gitlab_post_receive.rb b/lib/gitlab_post_receive.rb
index 4404244..3f411a0 100644
--- a/lib/gitlab_post_receive.rb
+++ b/lib/gitlab_post_receive.rb
@@ -1,6 +1,5 @@
 require_relative 'gitlab_init'
 require_relative 'gitlab_net'
-require_relative 'gitlab_reference_counter'
 require_relative 'gitlab_metrics'
 require 'json'
 require 'base64'
@@ -32,8 +31,6 @@ class GitlabPostReceive
     response['reference_counter_decreased']
   rescue GitlabNet::ApiUnreachableError
     false
-  rescue GitlabNet::NotFound
-    fallback_post_receive
   end
 
   protected
@@ -95,55 +92,4 @@ class GitlabPostReceive
     puts
     puts "=" * total_width
   end
-
-  def update_redis
-    # Encode changes as base64 so we don't run into trouble with non-UTF-8 input.
-    changes = Base64.encode64(@changes)
-    # TODO: Change to `@gl_repository` in next release.
-    # See https://gitlab.com/gitlab-org/gitlab-shell/merge_requests/130#note_28747613
-    project_identifier = @gl_repository || @repo_path
-
-    queue = "#{config.redis_namespace}:queue:post_receive"
-    msg = JSON.dump({
-      'class' => 'PostReceive',
-      'args' => [project_identifier, @actor, changes],
-      'jid' => @jid,
-      'enqueued_at' => Time.now.to_f
-    })
-
-    begin
-      GitlabNet.new.redis_client.rpush(queue, msg)
-      true
-    rescue => e
-      $stderr.puts "GitLab: An unexpected error occurred in writing to Redis: #{e}"
-      false
-    end
-  end
-
-  private
-
-  def fallback_post_receive
-    result = update_redis
-
-    begin
-      broadcast_message = GitlabMetrics.measure("broadcast-message") do
-        api.broadcast_message
-      end
-
-      if broadcast_message.has_key?("message")
-        print_broadcast_message(broadcast_message["message"])
-      end
-
-      merge_request_urls = GitlabMetrics.measure("merge-request-urls") do
-        api.merge_request_urls(@gl_repository, @repo_path, @changes)
-      end
-      print_merge_request_links(merge_request_urls)
-
-      api.notify_post_receive(gl_repository, repo_path)
-    rescue GitlabNet::ApiUnreachableError
-      nil
-    end
-
-    result && GitlabReferenceCounter.new(repo_path).decrease
-  end
 end
diff --git a/lib/gitlab_redis.rb b/lib/gitlab_redis.rb
deleted file mode 100644
index d34cc26..0000000
--- a/lib/gitlab_redis.rb
+++ /dev/null
@@ -1,2 +0,0 @@
-$:.unshift(File.expand_path(File.join(File.dirname(__FILE__), 'vendor/redis/lib')))
-require 'redis'
diff --git a/lib/gitlab_reference_counter.rb b/lib/gitlab_reference_counter.rb
deleted file mode 100644
index dc08f42..0000000
--- a/lib/gitlab_reference_counter.rb
+++ /dev/null
@@ -1,52 +0,0 @@
-require_relative 'gitlab_init'
-require_relative 'gitlab_net'
-
-class GitlabReferenceCounter
-  REFERENCE_EXPIRE_TIME = 600
-
-  attr_reader :path, :key
-
-  def initialize(path)
-    @path = path
-    @key = "git-receive-pack-reference-counter:#{path}"
-  end
-
-  def value
-    (redis_client.get(key) || 0).to_i
-  end
-
-  def increase
-    redis_cmd do
-      redis_client.incr(key)
-      redis_client.expire(key, REFERENCE_EXPIRE_TIME)
-    end
-  end
-
-  def decrease
-    redis_cmd do
-      current_value = redis_client.decr(key)
-      if current_value < 0
-        $logger.warn "Reference counter for #{path} decreased when its value was less than 1. Reseting the counter."
-        redis_client.del(key)
-      end
-    end
-  end
-
-  private
-
-  def redis_client
-    @redis_client ||= GitlabNet.new.redis_client
-  end
-
-  def redis_cmd
-    begin
-      yield
-      true
-    rescue => e
-      message = "GitLab: An unexpected error occurred in writing to Redis: #{e}"
-      $stderr.puts message
-      $logger.error message
-      false
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis.rb b/lib/vendor/redis/lib/redis.rb
deleted file mode 100644
index c61d483..0000000
--- a/lib/vendor/redis/lib/redis.rb
+++ /dev/null
@@ -1,2778 +0,0 @@
-require "monitor"
-require "redis/errors"
-
-class Redis
-
-  def self.deprecate(message, trace = caller[0])
-    $stderr.puts "\n#{message} (in #{trace})"
-  end
-
-  attr :client
-
-  # @deprecated The preferred way to create a new client object is using `#new`.
-  #             This method does not actually establish a connection to Redis,
-  #             in contrary to what you might expect.
-  def self.connect(options = {})
-    new(options)
-  end
-
-  def self.current
-    @current ||= Redis.new
-  end
-
-  def self.current=(redis)
-    @current = redis
-  end
-
-  include MonitorMixin
-
-  # Create a new client instance
-  #
-  # @param [Hash] options
-  # @option options [String] :url (value of the environment variable REDIS_URL) a Redis URL, for a TCP connection: `redis://:[password]@[hostname]:[port]/[db]` (password, port and database are optional), for a unix socket connection: `unix://[path to Redis socket]`. This overrides all other options.
-  # @option options [String] :host ("127.0.0.1") server hostname
-  # @option options [Fixnum] :port (6379) server port
-  # @option options [String] :path path to server socket (overrides host and port)
-  # @option options [Float] :timeout (5.0) timeout in seconds
-  # @option options [Float] :connect_timeout (same as timeout) timeout for initial connect in seconds
-  # @option options [String] :password Password to authenticate against server
-  # @option options [Fixnum] :db (0) Database to select after initial connect
-  # @option options [Symbol] :driver Driver to use, currently supported: `:ruby`, `:hiredis`, `:synchrony`
-  # @option options [String] :id ID for the client connection, assigns name to current connection by sending `CLIENT SETNAME`
-  # @option options [Hash, Fixnum] :tcp_keepalive Keepalive values, if Fixnum `intvl` and `probe` are calculated based on the value, if Hash `time`, `intvl` and `probes` can be specified as a Fixnum
-  # @option options [Fixnum] :reconnect_attempts Number of attempts trying to connect
-  # @option options [Boolean] :inherit_socket (false) Whether to use socket in forked process or not
-  # @option options [Array] :sentinels List of sentinels to contact
-  # @option options [Symbol] :role (:master) Role to fetch via Sentinel, either `:master` or `:slave`
-  #
-  # @return [Redis] a new client instance
-  def initialize(options = {})
-    @options = options.dup
-    @original_client = @client = Client.new(options)
-    @queue = Hash.new { |h, k| h[k] = [] }
-
-    super() # Monitor#initialize
-  end
-
-  def synchronize
-    mon_synchronize { yield(@client) }
-  end
-
-  # Run code with the client reconnecting
-  def with_reconnect(val=true, &blk)
-    synchronize do |client|
-      client.with_reconnect(val, &blk)
-    end
-  end
-
-  # Run code without the client reconnecting
-  def without_reconnect(&blk)
-    with_reconnect(false, &blk)
-  end
-
-  # Test whether or not the client is connected
-  def connected?
-    @original_client.connected?
-  end
-
-  # Disconnect the client as quickly and silently as possible.
-  def close
-    @original_client.disconnect
-  end
-  alias disconnect! close
-
-  # Sends a command to Redis and returns its reply.
-  #
-  # Replies are converted to Ruby objects according to the RESP protocol, so
-  # you can expect a Ruby array, integer or nil when Redis sends one. Higher
-  # level transformations, such as converting an array of pairs into a Ruby
-  # hash, are up to consumers.
-  #
-  # Redis error replies are raised as Ruby exceptions.
-  def call(*command)
-    synchronize do |client|
-      client.call(command)
-    end
-  end
-
-  # Queues a command for pipelining.
-  #
-  # Commands in the queue are executed with the Redis#commit method.
-  #
-  # See http://redis.io/topics/pipelining for more details.
-  #
-  def queue(*command)
-    @queue[Thread.current.object_id] << command
-  end
-
-  # Sends all commands in the queue.
-  #
-  # See http://redis.io/topics/pipelining for more details.
-  #
-  def commit
-    synchronize do |client|
-      begin
-        client.call_pipelined(@queue[Thread.current.object_id])
-      ensure
-        @queue.delete(Thread.current.object_id)
-      end
-    end
-  end
-
-  # Authenticate to the server.
-  #
-  # @param [String] password must match the password specified in the
-  #   `requirepass` directive in the configuration file
-  # @return [String] `OK`
-  def auth(password)
-    synchronize do |client|
-      client.call([:auth, password])
-    end
-  end
-
-  # Change the selected database for the current connection.
-  #
-  # @param [Fixnum] db zero-based index of the DB to use (0 to 15)
-  # @return [String] `OK`
-  def select(db)
-    synchronize do |client|
-      client.db = db
-      client.call([:select, db])
-    end
-  end
-
-  # Ping the server.
-  #
-  # @return [String] `PONG`
-  def ping
-    synchronize do |client|
-      client.call([:ping])
-    end
-  end
-
-  # Echo the given string.
-  #
-  # @param [String] value
-  # @return [String]
-  def echo(value)
-    synchronize do |client|
-      client.call([:echo, value])
-    end
-  end
-
-  # Close the connection.
-  #
-  # @return [String] `OK`
-  def quit
-    synchronize do |client|
-      begin
-        client.call([:quit])
-      rescue ConnectionError
-      ensure
-        client.disconnect
-      end
-    end
-  end
-
-  # Asynchronously rewrite the append-only file.
-  #
-  # @return [String] `OK`
-  def bgrewriteaof
-    synchronize do |client|
-      client.call([:bgrewriteaof])
-    end
-  end
-
-  # Asynchronously save the dataset to disk.
-  #
-  # @return [String] `OK`
-  def bgsave
-    synchronize do |client|
-      client.call([:bgsave])
-    end
-  end
-
-  # Get or set server configuration parameters.
-  #
-  # @param [Symbol] action e.g. `:get`, `:set`, `:resetstat`
-  # @return [String, Hash] string reply, or hash when retrieving more than one
-  #   property with `CONFIG GET`
-  def config(action, *args)
-    synchronize do |client|
-      client.call([:config, action] + args) do |reply|
-        if reply.kind_of?(Array) && action == :get
-          Hashify.call(reply)
-        else
-          reply
-        end
-      end
-    end
-  end
-
-  # Return the number of keys in the selected database.
-  #
-  # @return [Fixnum]
-  def dbsize
-    synchronize do |client|
-      client.call([:dbsize])
-    end
-  end
-
-  def debug(*args)
-    synchronize do |client|
-      client.call([:debug] + args)
-    end
-  end
-
-  # Remove all keys from all databases.
-  #
-  # @return [String] `OK`
-  def flushall
-    synchronize do |client|
-      client.call([:flushall])
-    end
-  end
-
-  # Remove all keys from the current database.
-  #
-  # @return [String] `OK`
-  def flushdb
-    synchronize do |client|
-      client.call([:flushdb])
-    end
-  end
-
-  # Get information and statistics about the server.
-  #
-  # @param [String, Symbol] cmd e.g. "commandstats"
-  # @return [Hash<String, String>]
-  def info(cmd = nil)
-    synchronize do |client|
-      client.call([:info, cmd].compact) do |reply|
-        if reply.kind_of?(String)
-          reply = Hash[reply.split("\r\n").map do |line|
-            line.split(":", 2) unless line =~ /^(#|$)/
-          end.compact]
-
-          if cmd && cmd.to_s == "commandstats"
-            # Extract nested hashes for INFO COMMANDSTATS
-            reply = Hash[reply.map do |k, v|
-              v = v.split(",").map { |e| e.split("=") }
-              [k[/^cmdstat_(.*)$/, 1], Hash[v]]
-            end]
-          end
-        end
-
-        reply
-      end
-    end
-  end
-
-  # Get the UNIX time stamp of the last successful save to disk.
-  #
-  # @return [Fixnum]
-  def lastsave
-    synchronize do |client|
-      client.call([:lastsave])
-    end
-  end
-
-  # Listen for all requests received by the server in real time.
-  #
-  # There is no way to interrupt this command.
-  #
-  # @yield a block to be called for every line of output
-  # @yieldparam [String] line timestamp and command that was executed
-  def monitor(&block)
-    synchronize do |client|
-      client.call_loop([:monitor], &block)
-    end
-  end
-
-  # Synchronously save the dataset to disk.
-  #
-  # @return [String]
-  def save
-    synchronize do |client|
-      client.call([:save])
-    end
-  end
-
-  # Synchronously save the dataset to disk and then shut down the server.
-  def shutdown
-    synchronize do |client|
-      client.with_reconnect(false) do
-        begin
-          client.call([:shutdown])
-        rescue ConnectionError
-          # This means Redis has probably exited.
-          nil
-        end
-      end
-    end
-  end
-
-  # Make the server a slave of another instance, or promote it as master.
-  def slaveof(host, port)
-    synchronize do |client|
-      client.call([:slaveof, host, port])
-    end
-  end
-
-  # Interact with the slowlog (get, len, reset)
-  #
-  # @param [String] subcommand e.g. `get`, `len`, `reset`
-  # @param [Fixnum] length maximum number of entries to return
-  # @return [Array<String>, Fixnum, String] depends on subcommand
-  def slowlog(subcommand, length=nil)
-    synchronize do |client|
-      args = [:slowlog, subcommand]
-      args << length if length
-      client.call args
-    end
-  end
-
-  # Internal command used for replication.
-  def sync
-    synchronize do |client|
-      client.call([:sync])
-    end
-  end
-
-  # Return the server time.
-  #
-  # @example
-  #   r.time # => [ 1333093196, 606806 ]
-  #
-  # @return [Array<Fixnum>] tuple of seconds since UNIX epoch and
-  #   microseconds in the current second
-  def time
-    synchronize do |client|
-      client.call([:time]) do |reply|
-        reply.map(&:to_i) if reply
-      end
-    end
-  end
-
-  # Remove the expiration from a key.
-  #
-  # @param [String] key
-  # @return [Boolean] whether the timeout was removed or not
-  def persist(key)
-    synchronize do |client|
-      client.call([:persist, key], &Boolify)
-    end
-  end
-
-  # Set a key's time to live in seconds.
-  #
-  # @param [String] key
-  # @param [Fixnum] seconds time to live
-  # @return [Boolean] whether the timeout was set or not
-  def expire(key, seconds)
-    synchronize do |client|
-      client.call([:expire, key, seconds], &Boolify)
-    end
-  end
-
-  # Set the expiration for a key as a UNIX timestamp.
-  #
-  # @param [String] key
-  # @param [Fixnum] unix_time expiry time specified as a UNIX timestamp
-  # @return [Boolean] whether the timeout was set or not
-  def expireat(key, unix_time)
-    synchronize do |client|
-      client.call([:expireat, key, unix_time], &Boolify)
-    end
-  end
-
-  # Get the time to live (in seconds) for a key.
-  #
-  # @param [String] key
-  # @return [Fixnum] remaining time to live in seconds.
-  #
-  # In Redis 2.6 or older the command returns -1 if the key does not exist or if
-  # the key exist but has no associated expire.
-  #
-  # Starting with Redis 2.8 the return value in case of error changed:
-  #
-  #     - The command returns -2 if the key does not exist.
-  #     - The command returns -1 if the key exists but has no associated expire.
-  def ttl(key)
-    synchronize do |client|
-      client.call([:ttl, key])
-    end
-  end
-
-  # Set a key's time to live in milliseconds.
-  #
-  # @param [String] key
-  # @param [Fixnum] milliseconds time to live
-  # @return [Boolean] whether the timeout was set or not
-  def pexpire(key, milliseconds)
-    synchronize do |client|
-      client.call([:pexpire, key, milliseconds], &Boolify)
-    end
-  end
-
-  # Set the expiration for a key as number of milliseconds from UNIX Epoch.
-  #
-  # @param [String] key
-  # @param [Fixnum] ms_unix_time expiry time specified as number of milliseconds from UNIX Epoch.
-  # @return [Boolean] whether the timeout was set or not
-  def pexpireat(key, ms_unix_time)
-    synchronize do |client|
-      client.call([:pexpireat, key, ms_unix_time], &Boolify)
-    end
-  end
-
-  # Get the time to live (in milliseconds) for a key.
-  #
-  # @param [String] key
-  # @return [Fixnum] remaining time to live in milliseconds
-  # In Redis 2.6 or older the command returns -1 if the key does not exist or if
-  # the key exist but has no associated expire.
-  #
-  # Starting with Redis 2.8 the return value in case of error changed:
-  #
-  #     - The command returns -2 if the key does not exist.
-  #     - The command returns -1 if the key exists but has no associated expire.
-  def pttl(key)
-    synchronize do |client|
-      client.call([:pttl, key])
-    end
-  end
-
-  # Return a serialized version of the value stored at a key.
-  #
-  # @param [String] key
-  # @return [String] serialized_value
-  def dump(key)
-    synchronize do |client|
-      client.call([:dump, key])
-    end
-  end
-
-  # Create a key using the serialized value, previously obtained using DUMP.
-  #
-  # @param [String] key
-  # @param [String] ttl
-  # @param [String] serialized_value
-  # @return [String] `"OK"`
-  def restore(key, ttl, serialized_value)
-    synchronize do |client|
-      client.call([:restore, key, ttl, serialized_value])
-    end
-  end
-
-  # Transfer a key from the connected instance to another instance.
-  #
-  # @param [String] key
-  # @param [Hash] options
-  #   - `:host => String`: host of instance to migrate to
-  #   - `:port => Integer`: port of instance to migrate to
-  #   - `:db => Integer`: database to migrate to (default: same as source)
-  #   - `:timeout => Integer`: timeout (default: same as connection timeout)
-  # @return [String] `"OK"`
-  def migrate(key, options)
-    host = options[:host] || raise(RuntimeError, ":host not specified")
-    port = options[:port] || raise(RuntimeError, ":port not specified")
-    db = (options[:db] || client.db).to_i
-    timeout = (options[:timeout] || client.timeout).to_i
-
-    synchronize do |client|
-      client.call([:migrate, host, port, key, db, timeout])
-    end
-  end
-
-  # Delete one or more keys.
-  #
-  # @param [String, Array<String>] keys
-  # @return [Fixnum] number of keys that were deleted
-  def del(*keys)
-    synchronize do |client|
-      client.call([:del] + keys)
-    end
-  end
-
-  # Determine if a key exists.
-  #
-  # @param [String] key
-  # @return [Boolean]
-  def exists(key)
-    synchronize do |client|
-      client.call([:exists, key], &Boolify)
-    end
-  end
-
-  # Find all keys matching the given pattern.
-  #
-  # @param [String] pattern
-  # @return [Array<String>]
-  def keys(pattern = "*")
-    synchronize do |client|
-      client.call([:keys, pattern]) do |reply|
-        if reply.kind_of?(String)
-          reply.split(" ")
-        else
-          reply
-        end
-      end
-    end
-  end
-
-  # Move a key to another database.
-  #
-  # @example Move a key to another database
-  #   redis.set "foo", "bar"
-  #     # => "OK"
-  #   redis.move "foo", 2
-  #     # => true
-  #   redis.exists "foo"
-  #     # => false
-  #   redis.select 2
-  #     # => "OK"
-  #   redis.exists "foo"
-  #     # => true
-  #   redis.get "foo"
-  #     # => "bar"
-  #
-  # @param [String] key
-  # @param [Fixnum] db
-  # @return [Boolean] whether the key was moved or not
-  def move(key, db)
-    synchronize do |client|
-      client.call([:move, key, db], &Boolify)
-    end
-  end
-
-  def object(*args)
-    synchronize do |client|
-      client.call([:object] + args)
-    end
-  end
-
-  # Return a random key from the keyspace.
-  #
-  # @return [String]
-  def randomkey
-    synchronize do |client|
-      client.call([:randomkey])
-    end
-  end
-
-  # Rename a key. If the new key already exists it is overwritten.
-  #
-  # @param [String] old_name
-  # @param [String] new_name
-  # @return [String] `OK`
-  def rename(old_name, new_name)
-    synchronize do |client|
-      client.call([:rename, old_name, new_name])
-    end
-  end
-
-  # Rename a key, only if the new key does not exist.
-  #
-  # @param [String] old_name
-  # @param [String] new_name
-  # @return [Boolean] whether the key was renamed or not
-  def renamenx(old_name, new_name)
-    synchronize do |client|
-      client.call([:renamenx, old_name, new_name], &Boolify)
-    end
-  end
-
-  # Sort the elements in a list, set or sorted set.
-  #
-  # @example Retrieve the first 2 elements from an alphabetically sorted "list"
-  #   redis.sort("list", :order => "alpha", :limit => [0, 2])
-  #     # => ["a", "b"]
-  # @example Store an alphabetically descending list in "target"
-  #   redis.sort("list", :order => "desc alpha", :store => "target")
-  #     # => 26
-  #
-  # @param [String] key
-  # @param [Hash] options
-  #   - `:by => String`: use external key to sort elements by
-  #   - `:limit => [offset, count]`: skip `offset` elements, return a maximum
-  #   of `count` elements
-  #   - `:get => [String, Array<String>]`: single key or array of keys to
-  #   retrieve per element in the result
-  #   - `:order => String`: combination of `ASC`, `DESC` and optionally `ALPHA`
-  #   - `:store => String`: key to store the result at
-  #
-  # @return [Array<String>, Array<Array<String>>, Fixnum]
-  #   - when `:get` is not specified, or holds a single element, an array of elements
-  #   - when `:get` is specified, and holds more than one element, an array of
-  #   elements where every element is an array with the result for every
-  #   element specified in `:get`
-  #   - when `:store` is specified, the number of elements in the stored result
-  def sort(key, options = {})
-    args = []
-
-    by = options[:by]
-    args.concat(["BY", by]) if by
-
-    limit = options[:limit]
-    args.concat(["LIMIT"] + limit) if limit
-
-    get = Array(options[:get])
-    args.concat(["GET"].product(get).flatten) unless get.empty?
-
-    order = options[:order]
-    args.concat(order.split(" ")) if order
-
-    store = options[:store]
-    args.concat(["STORE", store]) if store
-
-    synchronize do |client|
-      client.call([:sort, key] + args) do |reply|
-        if get.size > 1 && !store
-          if reply
-            reply.each_slice(get.size).to_a
-          end
-        else
-          reply
-        end
-      end
-    end
-  end
-
-  # Determine the type stored at key.
-  #
-  # @param [String] key
-  # @return [String] `string`, `list`, `set`, `zset`, `hash` or `none`
-  def type(key)
-    synchronize do |client|
-      client.call([:type, key])
-    end
-  end
-
-  # Decrement the integer value of a key by one.
-  #
-  # @example
-  #   redis.decr("value")
-  #     # => 4
-  #
-  # @param [String] key
-  # @return [Fixnum] value after decrementing it
-  def decr(key)
-    synchronize do |client|
-      client.call([:decr, key])
-    end
-  end
-
-  # Decrement the integer value of a key by the given number.
-  #
-  # @example
-  #   redis.decrby("value", 5)
-  #     # => 0
-  #
-  # @param [String] key
-  # @param [Fixnum] decrement
-  # @return [Fixnum] value after decrementing it
-  def decrby(key, decrement)
-    synchronize do |client|
-      client.call([:decrby, key, decrement])
-    end
-  end
-
-  # Increment the integer value of a key by one.
-  #
-  # @example
-  #   redis.incr("value")
-  #     # => 6
-  #
-  # @param [String] key
-  # @return [Fixnum] value after incrementing it
-  def incr(key)
-    synchronize do |client|
-      client.call([:incr, key])
-    end
-  end
-
-  # Increment the integer value of a key by the given integer number.
-  #
-  # @example
-  #   redis.incrby("value", 5)
-  #     # => 10
-  #
-  # @param [String] key
-  # @param [Fixnum] increment
-  # @return [Fixnum] value after incrementing it
-  def incrby(key, increment)
-    synchronize do |client|
-      client.call([:incrby, key, increment])
-    end
-  end
-
-  # Increment the numeric value of a key by the given float number.
-  #
-  # @example
-  #   redis.incrbyfloat("value", 1.23)
-  #     # => 1.23
-  #
-  # @param [String] key
-  # @param [Float] increment
-  # @return [Float] value after incrementing it
-  def incrbyfloat(key, increment)
-    synchronize do |client|
-      client.call([:incrbyfloat, key, increment], &Floatify)
-    end
-  end
-
-  # Set the string value of a key.
-  #
-  # @param [String] key
-  # @param [String] value
-  # @param [Hash] options
-  #   - `:ex => Fixnum`: Set the specified expire time, in seconds.
-  #   - `:px => Fixnum`: Set the specified expire time, in milliseconds.
-  #   - `:nx => true`: Only set the key if it does not already exist.
-  #   - `:xx => true`: Only set the key if it already exist.
-  # @return [String, Boolean] `"OK"` or true, false if `:nx => true` or `:xx => true`
-  def set(key, value, options = {})
-    args = []
-
-    ex = options[:ex]
-    args.concat(["EX", ex]) if ex
-
-    px = options[:px]
-    args.concat(["PX", px]) if px
-
-    nx = options[:nx]
-    args.concat(["NX"]) if nx
-
-    xx = options[:xx]
-    args.concat(["XX"]) if xx
-
-    synchronize do |client|
-      if nx || xx
-        client.call([:set, key, value.to_s] + args, &BoolifySet)
-      else
-        client.call([:set, key, value.to_s] + args)
-      end
-    end
-  end
-
-  alias :[]= :set
-
-  # Set the time to live in seconds of a key.
-  #
-  # @param [String] key
-  # @param [Fixnum] ttl
-  # @param [String] value
-  # @return [String] `"OK"`
-  def setex(key, ttl, value)
-    synchronize do |client|
-      client.call([:setex, key, ttl, value.to_s])
-    end
-  end
-
-  # Set the time to live in milliseconds of a key.
-  #
-  # @param [String] key
-  # @param [Fixnum] ttl
-  # @param [String] value
-  # @return [String] `"OK"`
-  def psetex(key, ttl, value)
-    synchronize do |client|
-      client.call([:psetex, key, ttl, value.to_s])
-    end
-  end
-
-  # Set the value of a key, only if the key does not exist.
-  #
-  # @param [String] key
-  # @param [String] value
-  # @return [Boolean] whether the key was set or not
-  def setnx(key, value)
-    synchronize do |client|
-      client.call([:setnx, key, value.to_s], &Boolify)
-    end
-  end
-
-  # Set one or more values.
-  #
-  # @example
-  #   redis.mset("key1", "v1", "key2", "v2")
-  #     # => "OK"
-  #
-  # @param [Array<String>] args array of keys and values
-  # @return [String] `"OK"`
-  #
-  # @see #mapped_mset
-  def mset(*args)
-    synchronize do |client|
-      client.call([:mset] + args)
-    end
-  end
-
-  # Set one or more values.
-  #
-  # @example
-  #   redis.mapped_mset({ "f1" => "v1", "f2" => "v2" })
-  #     # => "OK"
-  #
-  # @param [Hash] hash keys mapping to values
-  # @return [String] `"OK"`
-  #
-  # @see #mset
-  def mapped_mset(hash)
-    mset(hash.to_a.flatten)
-  end
-
-  # Set one or more values, only if none of the keys exist.
-  #
-  # @example
-  #   redis.msetnx("key1", "v1", "key2", "v2")
-  #     # => true
-  #
-  # @param [Array<String>] args array of keys and values
-  # @return [Boolean] whether or not all values were set
-  #
-  # @see #mapped_msetnx
-  def msetnx(*args)
-    synchronize do |client|
-      client.call([:msetnx] + args, &Boolify)
-    end
-  end
-
-  # Set one or more values, only if none of the keys exist.
-  #
-  # @example
-  #   redis.mapped_msetnx({ "key1" => "v1", "key2" => "v2" })
-  #     # => true
-  #
-  # @param [Hash] hash keys mapping to values
-  # @return [Boolean] whether or not all values were set
-  #
-  # @see #msetnx
-  def mapped_msetnx(hash)
-    msetnx(hash.to_a.flatten)
-  end
-
-  # Get the value of a key.
-  #
-  # @param [String] key
-  # @return [String]
-  def get(key)
-    synchronize do |client|
-      client.call([:get, key])
-    end
-  end
-
-  alias :[] :get
-
-  # Get the values of all the given keys.
-  #
-  # @example
-  #   redis.mget("key1", "key1")
-  #     # => ["v1", "v2"]
-  #
-  # @param [Array<String>] keys
-  # @return [Array<String>] an array of values for the specified keys
-  #
-  # @see #mapped_mget
-  def mget(*keys, &blk)
-    synchronize do |client|
-      client.call([:mget] + keys, &blk)
-    end
-  end
-
-  # Get the values of all the given keys.
-  #
-  # @example
-  #   redis.mapped_mget("key1", "key2")
-  #     # => { "key1" => "v1", "key2" => "v2" }
-  #
-  # @param [Array<String>] keys array of keys
-  # @return [Hash] a hash mapping the specified keys to their values
-  #
-  # @see #mget
-  def mapped_mget(*keys)
-    mget(*keys) do |reply|
-      if reply.kind_of?(Array)
-        Hash[keys.zip(reply)]
-      else
-        reply
-      end
-    end
-  end
-
-  # Overwrite part of a string at key starting at the specified offset.
-  #
-  # @param [String] key
-  # @param [Fixnum] offset byte offset
-  # @param [String] value
-  # @return [Fixnum] length of the string after it was modified
-  def setrange(key, offset, value)
-    synchronize do |client|
-      client.call([:setrange, key, offset, value.to_s])
-    end
-  end
-
-  # Get a substring of the string stored at a key.
-  #
-  # @param [String] key
-  # @param [Fixnum] start zero-based start offset
-  # @param [Fixnum] stop zero-based end offset. Use -1 for representing
-  #   the end of the string
-  # @return [Fixnum] `0` or `1`
-  def getrange(key, start, stop)
-    synchronize do |client|
-      client.call([:getrange, key, start, stop])
-    end
-  end
-
-  # Sets or clears the bit at offset in the string value stored at key.
-  #
-  # @param [String] key
-  # @param [Fixnum] offset bit offset
-  # @param [Fixnum] value bit value `0` or `1`
-  # @return [Fixnum] the original bit value stored at `offset`
-  def setbit(key, offset, value)
-    synchronize do |client|
-      client.call([:setbit, key, offset, value])
-    end
-  end
-
-  # Returns the bit value at offset in the string value stored at key.
-  #
-  # @param [String] key
-  # @param [Fixnum] offset bit offset
-  # @return [Fixnum] `0` or `1`
-  def getbit(key, offset)
-    synchronize do |client|
-      client.call([:getbit, key, offset])
-    end
-  end
-
-  # Append a value to a key.
-  #
-  # @param [String] key
-  # @param [String] value value to append
-  # @return [Fixnum] length of the string after appending
-  def append(key, value)
-    synchronize do |client|
-      client.call([:append, key, value])
-    end
-  end
-
-  # Count the number of set bits in a range of the string value stored at key.
-  #
-  # @param [String] key
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @return [Fixnum] the number of bits set to 1
-  def bitcount(key, start = 0, stop = -1)
-    synchronize do |client|
-      client.call([:bitcount, key, start, stop])
-    end
-  end
-
-  # Perform a bitwise operation between strings and store the resulting string in a key.
-  #
-  # @param [String] operation e.g. `and`, `or`, `xor`, `not`
-  # @param [String] destkey destination key
-  # @param [String, Array<String>] keys one or more source keys to perform `operation`
-  # @return [Fixnum] the length of the string stored in `destkey`
-  def bitop(operation, destkey, *keys)
-    synchronize do |client|
-      client.call([:bitop, operation, destkey] + keys)
-    end
-  end
-
-  # Return the position of the first bit set to 1 or 0 in a string.
-  #
-  # @param [String] key
-  # @param [Fixnum] bit whether to look for the first 1 or 0 bit
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @return [Fixnum] the position of the first 1/0 bit.
-  #                  -1 if looking for 1 and it is not found or start and stop are given.
-  def bitpos(key, bit, start=nil, stop=nil)
-    if stop and not start
-      raise(ArgumentError, 'stop parameter specified without start parameter')
-    end
-
-    synchronize do |client|
-      command = [:bitpos, key, bit]
-      command << start if start
-      command << stop if stop
-      client.call(command)
-    end
-  end
-
-  # Set the string value of a key and return its old value.
-  #
-  # @param [String] key
-  # @param [String] value value to replace the current value with
-  # @return [String] the old value stored in the key, or `nil` if the key
-  #   did not exist
-  def getset(key, value)
-    synchronize do |client|
-      client.call([:getset, key, value.to_s])
-    end
-  end
-
-  # Get the length of the value stored in a key.
-  #
-  # @param [String] key
-  # @return [Fixnum] the length of the value stored in the key, or 0
-  #   if the key does not exist
-  def strlen(key)
-    synchronize do |client|
-      client.call([:strlen, key])
-    end
-  end
-
-  # Get the length of a list.
-  #
-  # @param [String] key
-  # @return [Fixnum]
-  def llen(key)
-    synchronize do |client|
-      client.call([:llen, key])
-    end
-  end
-
-  # Prepend one or more values to a list, creating the list if it doesn't exist
-  #
-  # @param [String] key
-  # @param [String, Array] value string value, or array of string values to push
-  # @return [Fixnum] the length of the list after the push operation
-  def lpush(key, value)
-    synchronize do |client|
-      client.call([:lpush, key, value])
-    end
-  end
-
-  # Prepend a value to a list, only if the list exists.
-  #
-  # @param [String] key
-  # @param [String] value
-  # @return [Fixnum] the length of the list after the push operation
-  def lpushx(key, value)
-    synchronize do |client|
-      client.call([:lpushx, key, value])
-    end
-  end
-
-  # Append one or more values to a list, creating the list if it doesn't exist
-  #
-  # @param [String] key
-  # @param [String] value
-  # @return [Fixnum] the length of the list after the push operation
-  def rpush(key, value)
-    synchronize do |client|
-      client.call([:rpush, key, value])
-    end
-  end
-
-  # Append a value to a list, only if the list exists.
-  #
-  # @param [String] key
-  # @param [String] value
-  # @return [Fixnum] the length of the list after the push operation
-  def rpushx(key, value)
-    synchronize do |client|
-      client.call([:rpushx, key, value])
-    end
-  end
-
-  # Remove and get the first element in a list.
-  #
-  # @param [String] key
-  # @return [String]
-  def lpop(key)
-    synchronize do |client|
-      client.call([:lpop, key])
-    end
-  end
-
-  # Remove and get the last element in a list.
-  #
-  # @param [String] key
-  # @return [String]
-  def rpop(key)
-    synchronize do |client|
-      client.call([:rpop, key])
-    end
-  end
-
-  # Remove the last element in a list, append it to another list and return it.
-  #
-  # @param [String] source source key
-  # @param [String] destination destination key
-  # @return [nil, String] the element, or nil when the source key does not exist
-  def rpoplpush(source, destination)
-    synchronize do |client|
-      client.call([:rpoplpush, source, destination])
-    end
-  end
-
-  def _bpop(cmd, args)
-    options = {}
-
-    case args.last
-    when Hash
-      options = args.pop
-    when Integer
-      # Issue deprecation notice in obnoxious mode...
-      options[:timeout] = args.pop
-    end
-
-    if args.size > 1
-      # Issue deprecation notice in obnoxious mode...
-    end
-
-    keys = args.flatten
-    timeout = options[:timeout] || 0
-
-    synchronize do |client|
-      command = [cmd, keys, timeout]
-      timeout += client.timeout if timeout > 0
-      client.call_with_timeout(command, timeout)
-    end
-  end
-
-  # Remove and get the first element in a list, or block until one is available.
-  #
-  # @example With timeout
-  #   list, element = redis.blpop("list", :timeout => 5)
-  #     # => nil on timeout
-  #     # => ["list", "element"] on success
-  # @example Without timeout
-  #   list, element = redis.blpop("list")
-  #     # => ["list", "element"]
-  # @example Blocking pop on multiple lists
-  #   list, element = redis.blpop(["list", "another_list"])
-  #     # => ["list", "element"]
-  #
-  # @param [String, Array<String>] keys one or more keys to perform the
-  #   blocking pop on
-  # @param [Hash] options
-  #   - `:timeout => Fixnum`: timeout in seconds, defaults to no timeout
-  #
-  # @return [nil, [String, String]]
-  #   - `nil` when the operation timed out
-  #   - tuple of the list that was popped from and element was popped otherwise
-  def blpop(*args)
-    _bpop(:blpop, args)
-  end
-
-  # Remove and get the last element in a list, or block until one is available.
-  #
-  # @param [String, Array<String>] keys one or more keys to perform the
-  #   blocking pop on
-  # @param [Hash] options
-  #   - `:timeout => Fixnum`: timeout in seconds, defaults to no timeout
-  #
-  # @return [nil, [String, String]]
-  #   - `nil` when the operation timed out
-  #   - tuple of the list that was popped from and element was popped otherwise
-  #
-  # @see #blpop
-  def brpop(*args)
-    _bpop(:brpop, args)
-  end
-
-  # Pop a value from a list, push it to another list and return it; or block
-  # until one is available.
-  #
-  # @param [String] source source key
-  # @param [String] destination destination key
-  # @param [Hash] options
-  #   - `:timeout => Fixnum`: timeout in seconds, defaults to no timeout
-  #
-  # @return [nil, String]
-  #   - `nil` when the operation timed out
-  #   - the element was popped and pushed otherwise
-  def brpoplpush(source, destination, options = {})
-    case options
-    when Integer
-      # Issue deprecation notice in obnoxious mode...
-      options = { :timeout => options }
-    end
-
-    timeout = options[:timeout] || 0
-
-    synchronize do |client|
-      command = [:brpoplpush, source, destination, timeout]
-      timeout += client.timeout if timeout > 0
-      client.call_with_timeout(command, timeout)
-    end
-  end
-
-  # Get an element from a list by its index.
-  #
-  # @param [String] key
-  # @param [Fixnum] index
-  # @return [String]
-  def lindex(key, index)
-    synchronize do |client|
-      client.call([:lindex, key, index])
-    end
-  end
-
-  # Insert an element before or after another element in a list.
-  #
-  # @param [String] key
-  # @param [String, Symbol] where `BEFORE` or `AFTER`
-  # @param [String] pivot reference element
-  # @param [String] value
-  # @return [Fixnum] length of the list after the insert operation, or `-1`
-  #   when the element `pivot` was not found
-  def linsert(key, where, pivot, value)
-    synchronize do |client|
-      client.call([:linsert, key, where, pivot, value])
-    end
-  end
-
-  # Get a range of elements from a list.
-  #
-  # @param [String] key
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @return [Array<String>]
-  def lrange(key, start, stop)
-    synchronize do |client|
-      client.call([:lrange, key, start, stop])
-    end
-  end
-
-  # Remove elements from a list.
-  #
-  # @param [String] key
-  # @param [Fixnum] count number of elements to remove. Use a positive
-  #   value to remove the first `count` occurrences of `value`. A negative
-  #   value to remove the last `count` occurrences of `value`. Or zero, to
-  #   remove all occurrences of `value` from the list.
-  # @param [String] value
-  # @return [Fixnum] the number of removed elements
-  def lrem(key, count, value)
-    synchronize do |client|
-      client.call([:lrem, key, count, value])
-    end
-  end
-
-  # Set the value of an element in a list by its index.
-  #
-  # @param [String] key
-  # @param [Fixnum] index
-  # @param [String] value
-  # @return [String] `OK`
-  def lset(key, index, value)
-    synchronize do |client|
-      client.call([:lset, key, index, value])
-    end
-  end
-
-  # Trim a list to the specified range.
-  #
-  # @param [String] key
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @return [String] `OK`
-  def ltrim(key, start, stop)
-    synchronize do |client|
-      client.call([:ltrim, key, start, stop])
-    end
-  end
-
-  # Get the number of members in a set.
-  #
-  # @param [String] key
-  # @return [Fixnum]
-  def scard(key)
-    synchronize do |client|
-      client.call([:scard, key])
-    end
-  end
-
-  # Add one or more members to a set.
-  #
-  # @param [String] key
-  # @param [String, Array<String>] member one member, or array of members
-  # @return [Boolean, Fixnum] `Boolean` when a single member is specified,
-  #   holding whether or not adding the member succeeded, or `Fixnum` when an
-  #   array of members is specified, holding the number of members that were
-  #   successfully added
-  def sadd(key, member)
-    synchronize do |client|
-      client.call([:sadd, key, member]) do |reply|
-        if member.is_a? Array
-          # Variadic: return integer
-          reply
-        else
-          # Single argument: return boolean
-          Boolify.call(reply)
-        end
-      end
-    end
-  end
-
-  # Remove one or more members from a set.
-  #
-  # @param [String] key
-  # @param [String, Array<String>] member one member, or array of members
-  # @return [Boolean, Fixnum] `Boolean` when a single member is specified,
-  #   holding whether or not removing the member succeeded, or `Fixnum` when an
-  #   array of members is specified, holding the number of members that were
-  #   successfully removed
-  def srem(key, member)
-    synchronize do |client|
-      client.call([:srem, key, member]) do |reply|
-        if member.is_a? Array
-          # Variadic: return integer
-          reply
-        else
-          # Single argument: return boolean
-          Boolify.call(reply)
-        end
-      end
-    end
-  end
-
-  # Remove and return one or more random member from a set.
-  #
-  # @param [String] key
-  # @return [String]
-  # @param [Fixnum] count
-  def spop(key, count = nil)
-    synchronize do |client|
-      if count.nil?
-        client.call([:spop, key])
-      else
-        client.call([:spop, key, count])
-      end
-    end
-  end
-
-  # Get one or more random members from a set.
-  #
-  # @param [String] key
-  # @param [Fixnum] count
-  # @return [String]
-  def srandmember(key, count = nil)
-    synchronize do |client|
-      if count.nil?
-        client.call([:srandmember, key])
-      else
-        client.call([:srandmember, key, count])
-      end
-    end
-  end
-
-  # Move a member from one set to another.
-  #
-  # @param [String] source source key
-  # @param [String] destination destination key
-  # @param [String] member member to move from `source` to `destination`
-  # @return [Boolean]
-  def smove(source, destination, member)
-    synchronize do |client|
-      client.call([:smove, source, destination, member], &Boolify)
-    end
-  end
-
-  # Determine if a given value is a member of a set.
-  #
-  # @param [String] key
-  # @param [String] member
-  # @return [Boolean]
-  def sismember(key, member)
-    synchronize do |client|
-      client.call([:sismember, key, member], &Boolify)
-    end
-  end
-
-  # Get all the members in a set.
-  #
-  # @param [String] key
-  # @return [Array<String>]
-  def smembers(key)
-    synchronize do |client|
-      client.call([:smembers, key])
-    end
-  end
-
-  # Subtract multiple sets.
-  #
-  # @param [String, Array<String>] keys keys pointing to sets to subtract
-  # @return [Array<String>] members in the difference
-  def sdiff(*keys)
-    synchronize do |client|
-      client.call([:sdiff] + keys)
-    end
-  end
-
-  # Subtract multiple sets and store the resulting set in a key.
-  #
-  # @param [String] destination destination key
-  # @param [String, Array<String>] keys keys pointing to sets to subtract
-  # @return [Fixnum] number of elements in the resulting set
-  def sdiffstore(destination, *keys)
-    synchronize do |client|
-      client.call([:sdiffstore, destination] + keys)
-    end
-  end
-
-  # Intersect multiple sets.
-  #
-  # @param [String, Array<String>] keys keys pointing to sets to intersect
-  # @return [Array<String>] members in the intersection
-  def sinter(*keys)
-    synchronize do |client|
-      client.call([:sinter] + keys)
-    end
-  end
-
-  # Intersect multiple sets and store the resulting set in a key.
-  #
-  # @param [String] destination destination key
-  # @param [String, Array<String>] keys keys pointing to sets to intersect
-  # @return [Fixnum] number of elements in the resulting set
-  def sinterstore(destination, *keys)
-    synchronize do |client|
-      client.call([:sinterstore, destination] + keys)
-    end
-  end
-
-  # Add multiple sets.
-  #
-  # @param [String, Array<String>] keys keys pointing to sets to unify
-  # @return [Array<String>] members in the union
-  def sunion(*keys)
-    synchronize do |client|
-      client.call([:sunion] + keys)
-    end
-  end
-
-  # Add multiple sets and store the resulting set in a key.
-  #
-  # @param [String] destination destination key
-  # @param [String, Array<String>] keys keys pointing to sets to unify
-  # @return [Fixnum] number of elements in the resulting set
-  def sunionstore(destination, *keys)
-    synchronize do |client|
-      client.call([:sunionstore, destination] + keys)
-    end
-  end
-
-  # Get the number of members in a sorted set.
-  #
-  # @example
-  #   redis.zcard("zset")
-  #     # => 4
-  #
-  # @param [String] key
-  # @return [Fixnum]
-  def zcard(key)
-    synchronize do |client|
-      client.call([:zcard, key])
-    end
-  end
-
-  # Add one or more members to a sorted set, or update the score for members
-  # that already exist.
-  #
-  # @example Add a single `[score, member]` pair to a sorted set
-  #   redis.zadd("zset", 32.0, "member")
-  # @example Add an array of `[score, member]` pairs to a sorted set
-  #   redis.zadd("zset", [[32.0, "a"], [64.0, "b"]])
-  #
-  # @param [String] key
-  # @param [[Float, String], Array<[Float, String]>] args
-  #   - a single `[score, member]` pair
-  #   - an array of `[score, member]` pairs
-  # @param [Hash] options
-  #   - `:xx => true`: Only update elements that already exist (never
-  #   add elements)
-  #   - `:nx => true`: Don't update already existing elements (always
-  #   add new elements)
-  #   - `:ch => true`: Modify the return value from the number of new
-  #   elements added, to the total number of elements changed (CH is an
-  #   abbreviation of changed); changed elements are new elements added
-  #   and elements already existing for which the score was updated
-  #   - `:incr => true`: When this option is specified ZADD acts like
-  #   ZINCRBY; only one score-element pair can be specified in this mode
-  #
-  # @return [Boolean, Fixnum, Float]
-  #   - `Boolean` when a single pair is specified, holding whether or not it was
-  #   **added** to the sorted set.
-  #   - `Fixnum` when an array of pairs is specified, holding the number of
-  #   pairs that were **added** to the sorted set.
-  #   - `Float` when option :incr is specified, holding the score of the member
-  #   after incrementing it.
-  def zadd(key, *args) #, options
-    zadd_options = []
-    if args.last.is_a?(Hash)
-      options = args.pop
-
-      nx = options[:nx]
-      zadd_options << "NX" if nx
-
-      xx = options[:xx]
-      zadd_options << "XX" if xx
-
-      ch = options[:ch]
-      zadd_options << "CH" if ch
-
-      incr = options[:incr]
-      zadd_options << "INCR" if incr
-    end
-
-    synchronize do |client|
-      if args.size == 1 && args[0].is_a?(Array)
-        # Variadic: return float if INCR, integer if !INCR
-        client.call([:zadd, key] + zadd_options + args[0], &(incr ? Floatify : nil))
-      elsif args.size == 2
-        # Single pair: return float if INCR, boolean if !INCR
-        client.call([:zadd, key] + zadd_options + args, &(incr ? Floatify : Boolify))
-      else
-        raise ArgumentError, "wrong number of arguments"
-      end
-    end
-  end
-
-  # Increment the score of a member in a sorted set.
-  #
-  # @example
-  #   redis.zincrby("zset", 32.0, "a")
-  #     # => 64.0
-  #
-  # @param [String] key
-  # @param [Float] increment
-  # @param [String] member
-  # @return [Float] score of the member after incrementing it
-  def zincrby(key, increment, member)
-    synchronize do |client|
-      client.call([:zincrby, key, increment, member], &Floatify)
-    end
-  end
-
-  # Remove one or more members from a sorted set.
-  #
-  # @example Remove a single member from a sorted set
-  #   redis.zrem("zset", "a")
-  # @example Remove an array of members from a sorted set
-  #   redis.zrem("zset", ["a", "b"])
-  #
-  # @param [String] key
-  # @param [String, Array<String>] member
-  #   - a single member
-  #   - an array of members
-  #
-  # @return [Boolean, Fixnum]
-  #   - `Boolean` when a single member is specified, holding whether or not it
-  #   was removed from the sorted set
-  #   - `Fixnum` when an array of pairs is specified, holding the number of
-  #   members that were removed to the sorted set
-  def zrem(key, member)
-    synchronize do |client|
-      client.call([:zrem, key, member]) do |reply|
-        if member.is_a? Array
-          # Variadic: return integer
-          reply
-        else
-          # Single argument: return boolean
-          Boolify.call(reply)
-        end
-      end
-    end
-  end
-
-  # Get the score associated with the given member in a sorted set.
-  #
-  # @example Get the score for member "a"
-  #   redis.zscore("zset", "a")
-  #     # => 32.0
-  #
-  # @param [String] key
-  # @param [String] member
-  # @return [Float] score of the member
-  def zscore(key, member)
-    synchronize do |client|
-      client.call([:zscore, key, member], &Floatify)
-    end
-  end
-
-  # Return a range of members in a sorted set, by index.
-  #
-  # @example Retrieve all members from a sorted set
-  #   redis.zrange("zset", 0, -1)
-  #     # => ["a", "b"]
-  # @example Retrieve all members and their scores from a sorted set
-  #   redis.zrange("zset", 0, -1, :with_scores => true)
-  #     # => [["a", 32.0], ["b", 64.0]]
-  #
-  # @param [String] key
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @param [Hash] options
-  #   - `:with_scores => true`: include scores in output
-  #
-  # @return [Array<String>, Array<[String, Float]>]
-  #   - when `:with_scores` is not specified, an array of members
-  #   - when `:with_scores` is specified, an array with `[member, score]` pairs
-  def zrange(key, start, stop, options = {})
-    args = []
-
-    with_scores = options[:with_scores] || options[:withscores]
-
-    if with_scores
-      args << "WITHSCORES"
-      block = FloatifyPairs
-    end
-
-    synchronize do |client|
-      client.call([:zrange, key, start, stop] + args, &block)
-    end
-  end
-
-  # Return a range of members in a sorted set, by index, with scores ordered
-  # from high to low.
-  #
-  # @example Retrieve all members from a sorted set
-  #   redis.zrevrange("zset", 0, -1)
-  #     # => ["b", "a"]
-  # @example Retrieve all members and their scores from a sorted set
-  #   redis.zrevrange("zset", 0, -1, :with_scores => true)
-  #     # => [["b", 64.0], ["a", 32.0]]
-  #
-  # @see #zrange
-  def zrevrange(key, start, stop, options = {})
-    args = []
-
-    with_scores = options[:with_scores] || options[:withscores]
-
-    if with_scores
-      args << "WITHSCORES"
-      block = FloatifyPairs
-    end
-
-    synchronize do |client|
-      client.call([:zrevrange, key, start, stop] + args, &block)
-    end
-  end
-
-  # Determine the index of a member in a sorted set.
-  #
-  # @param [String] key
-  # @param [String] member
-  # @return [Fixnum]
-  def zrank(key, member)
-    synchronize do |client|
-      client.call([:zrank, key, member])
-    end
-  end
-
-  # Determine the index of a member in a sorted set, with scores ordered from
-  # high to low.
-  #
-  # @param [String] key
-  # @param [String] member
-  # @return [Fixnum]
-  def zrevrank(key, member)
-    synchronize do |client|
-      client.call([:zrevrank, key, member])
-    end
-  end
-
-  # Remove all members in a sorted set within the given indexes.
-  #
-  # @example Remove first 5 members
-  #   redis.zremrangebyrank("zset", 0, 4)
-  #     # => 5
-  # @example Remove last 5 members
-  #   redis.zremrangebyrank("zset", -5, -1)
-  #     # => 5
-  #
-  # @param [String] key
-  # @param [Fixnum] start start index
-  # @param [Fixnum] stop stop index
-  # @return [Fixnum] number of members that were removed
-  def zremrangebyrank(key, start, stop)
-    synchronize do |client|
-      client.call([:zremrangebyrank, key, start, stop])
-    end
-  end
-
-  # Return a range of members with the same score in a sorted set, by lexicographical ordering
-  #
-  # @example Retrieve members matching a
-  #   redis.zrangebylex("zset", "[a", "[a\xff")
-  #     # => ["aaren", "aarika", "abagael", "abby"]
-  # @example Retrieve the first 2 members matching a
-  #   redis.zrangebylex("zset", "[a", "[a\xff", :limit => [0, 2])
-  #     # => ["aaren", "aarika"]
-  #
-  # @param [String] key
-  # @param [String] min
-  #   - inclusive minimum is specified by prefixing `(`
-  #   - exclusive minimum is specified by prefixing `[`
-  # @param [String] max
-  #   - inclusive maximum is specified by prefixing `(`
-  #   - exclusive maximum is specified by prefixing `[`
-  # @param [Hash] options
-  #   - `:limit => [offset, count]`: skip `offset` members, return a maximum of
-  #   `count` members
-  #
-  # @return [Array<String>, Array<[String, Float]>]
-  def zrangebylex(key, min, max, options = {})
-    args = []
-
-    limit = options[:limit]
-    args.concat(["LIMIT"] + limit) if limit
-
-    synchronize do |client|
-      client.call([:zrangebylex, key, min, max] + args)
-    end
-  end
-
-  # Return a range of members with the same score in a sorted set, by reversed lexicographical ordering.
-  # Apart from the reversed ordering, #zrevrangebylex is similar to #zrangebylex.
-  #
-  # @example Retrieve members matching a
-  #   redis.zrevrangebylex("zset", "[a", "[a\xff")
-  #     # => ["abbygail", "abby", "abagael", "aaren"]
-  # @example Retrieve the last 2 members matching a
-  #   redis.zrevrangebylex("zset", "[a", "[a\xff", :limit => [0, 2])
-  #     # => ["abbygail", "abby"]
-  #
-  # @see #zrangebylex
-  def zrevrangebylex(key, max, min, options = {})
-    args = []
-
-    limit = options[:limit]
-    args.concat(["LIMIT"] + limit) if limit
-
-    synchronize do |client|
-      client.call([:zrevrangebylex, key, max, min] + args)
-    end
-  end
-
-  # Return a range of members in a sorted set, by score.
-  #
-  # @example Retrieve members with score `>= 5` and `< 100`
-  #   redis.zrangebyscore("zset", "5", "(100")
-  #     # => ["a", "b"]
-  # @example Retrieve the first 2 members with score `>= 0`
-  #   redis.zrangebyscore("zset", "0", "+inf", :limit => [0, 2])
-  #     # => ["a", "b"]
-  # @example Retrieve members and their scores with scores `> 5`
-  #   redis.zrangebyscore("zset", "(5", "+inf", :with_scores => true)
-  #     # => [["a", 32.0], ["b", 64.0]]
-  #
-  # @param [String] key
-  # @param [String] min
-  #   - inclusive minimum score is specified verbatim
-  #   - exclusive minimum score is specified by prefixing `(`
-  # @param [String] max
-  #   - inclusive maximum score is specified verbatim
-  #   - exclusive maximum score is specified by prefixing `(`
-  # @param [Hash] options
-  #   - `:with_scores => true`: include scores in output
-  #   - `:limit => [offset, count]`: skip `offset` members, return a maximum of
-  #   `count` members
-  #
-  # @return [Array<String>, Array<[String, Float]>]
-  #   - when `:with_scores` is not specified, an array of members
-  #   - when `:with_scores` is specified, an array with `[member, score]` pairs
-  def zrangebyscore(key, min, max, options = {})
-    args = []
-
-    with_scores = options[:with_scores] || options[:withscores]
-
-    if with_scores
-      args << "WITHSCORES"
-      block = FloatifyPairs
-    end
-
-    limit = options[:limit]
-    args.concat(["LIMIT"] + limit) if limit
-
-    synchronize do |client|
-      client.call([:zrangebyscore, key, min, max] + args, &block)
-    end
-  end
-
-  # Return a range of members in a sorted set, by score, with scores ordered
-  # from high to low.
-  #
-  # @example Retrieve members with score `< 100` and `>= 5`
-  #   redis.zrevrangebyscore("zset", "(100", "5")
-  #     # => ["b", "a"]
-  # @example Retrieve the first 2 members with score `<= 0`
-  #   redis.zrevrangebyscore("zset", "0", "-inf", :limit => [0, 2])
-  #     # => ["b", "a"]
-  # @example Retrieve members and their scores with scores `> 5`
-  #   redis.zrevrangebyscore("zset", "+inf", "(5", :with_scores => true)
-  #     # => [["b", 64.0], ["a", 32.0]]
-  #
-  # @see #zrangebyscore
-  def zrevrangebyscore(key, max, min, options = {})
-    args = []
-
-    with_scores = options[:with_scores] || options[:withscores]
-
-    if with_scores
-      args << ["WITHSCORES"]
-      block = FloatifyPairs
-    end
-
-    limit = options[:limit]
-    args.concat(["LIMIT"] + limit) if limit
-
-    synchronize do |client|
-      client.call([:zrevrangebyscore, key, max, min] + args, &block)
-    end
-  end
-
-  # Remove all members in a sorted set within the given scores.
-  #
-  # @example Remove members with score `>= 5` and `< 100`
-  #   redis.zremrangebyscore("zset", "5", "(100")
-  #     # => 2
-  # @example Remove members with scores `> 5`
-  #   redis.zremrangebyscore("zset", "(5", "+inf")
-  #     # => 2
-  #
-  # @param [String] key
-  # @param [String] min
-  #   - inclusive minimum score is specified verbatim
-  #   - exclusive minimum score is specified by prefixing `(`
-  # @param [String] max
-  #   - inclusive maximum score is specified verbatim
-  #   - exclusive maximum score is specified by prefixing `(`
-  # @return [Fixnum] number of members that were removed
-  def zremrangebyscore(key, min, max)
-    synchronize do |client|
-      client.call([:zremrangebyscore, key, min, max])
-    end
-  end
-
-  # Count the members in a sorted set with scores within the given values.
-  #
-  # @example Count members with score `>= 5` and `< 100`
-  #   redis.zcount("zset", "5", "(100")
-  #     # => 2
-  # @example Count members with scores `> 5`
-  #   redis.zcount("zset", "(5", "+inf")
-  #     # => 2
-  #
-  # @param [String] key
-  # @param [String] min
-  #   - inclusive minimum score is specified verbatim
-  #   - exclusive minimum score is specified by prefixing `(`
-  # @param [String] max
-  #   - inclusive maximum score is specified verbatim
-  #   - exclusive maximum score is specified by prefixing `(`
-  # @return [Fixnum] number of members in within the specified range
-  def zcount(key, min, max)
-    synchronize do |client|
-      client.call([:zcount, key, min, max])
-    end
-  end
-
-  # Intersect multiple sorted sets and store the resulting sorted set in a new
-  # key.
-  #
-  # @example Compute the intersection of `2*zsetA` with `1*zsetB`, summing their scores
-  #   redis.zinterstore("zsetC", ["zsetA", "zsetB"], :weights => [2.0, 1.0], :aggregate => "sum")
-  #     # => 4
-  #
-  # @param [String] destination destination key
-  # @param [Array<String>] keys source keys
-  # @param [Hash] options
-  #   - `:weights => [Float, Float, ...]`: weights to associate with source
-  #   sorted sets
-  #   - `:aggregate => String`: aggregate function to use (sum, min, max, ...)
-  # @return [Fixnum] number of elements in the resulting sorted set
-  def zinterstore(destination, keys, options = {})
-    args = []
-
-    weights = options[:weights]
-    args.concat(["WEIGHTS"] + weights) if weights
-
-    aggregate = options[:aggregate]
-    args.concat(["AGGREGATE", aggregate]) if aggregate
-
-    synchronize do |client|
-      client.call([:zinterstore, destination, keys.size] + keys + args)
-    end
-  end
-
-  # Add multiple sorted sets and store the resulting sorted set in a new key.
-  #
-  # @example Compute the union of `2*zsetA` with `1*zsetB`, summing their scores
-  #   redis.zunionstore("zsetC", ["zsetA", "zsetB"], :weights => [2.0, 1.0], :aggregate => "sum")
-  #     # => 8
-  #
-  # @param [String] destination destination key
-  # @param [Array<String>] keys source keys
-  # @param [Hash] options
-  #   - `:weights => [Float, Float, ...]`: weights to associate with source
-  #   sorted sets
-  #   - `:aggregate => String`: aggregate function to use (sum, min, max, ...)
-  # @return [Fixnum] number of elements in the resulting sorted set
-  def zunionstore(destination, keys, options = {})
-    args = []
-
-    weights = options[:weights]
-    args.concat(["WEIGHTS"] + weights) if weights
-
-    aggregate = options[:aggregate]
-    args.concat(["AGGREGATE", aggregate]) if aggregate
-
-    synchronize do |client|
-      client.call([:zunionstore, destination, keys.size] + keys + args)
-    end
-  end
-
-  # Get the number of fields in a hash.
-  #
-  # @param [String] key
-  # @return [Fixnum] number of fields in the hash
-  def hlen(key)
-    synchronize do |client|
-      client.call([:hlen, key])
-    end
-  end
-
-  # Set the string value of a hash field.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @param [String] value
-  # @return [Boolean] whether or not the field was **added** to the hash
-  def hset(key, field, value)
-    synchronize do |client|
-      client.call([:hset, key, field, value], &Boolify)
-    end
-  end
-
-  # Set the value of a hash field, only if the field does not exist.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @param [String] value
-  # @return [Boolean] whether or not the field was **added** to the hash
-  def hsetnx(key, field, value)
-    synchronize do |client|
-      client.call([:hsetnx, key, field, value], &Boolify)
-    end
-  end
-
-  # Set one or more hash values.
-  #
-  # @example
-  #   redis.hmset("hash", "f1", "v1", "f2", "v2")
-  #     # => "OK"
-  #
-  # @param [String] key
-  # @param [Array<String>] attrs array of fields and values
-  # @return [String] `"OK"`
-  #
-  # @see #mapped_hmset
-  def hmset(key, *attrs)
-    synchronize do |client|
-      client.call([:hmset, key] + attrs)
-    end
-  end
-
-  # Set one or more hash values.
-  #
-  # @example
-  #   redis.mapped_hmset("hash", { "f1" => "v1", "f2" => "v2" })
-  #     # => "OK"
-  #
-  # @param [String] key
-  # @param [Hash] hash a non-empty hash with fields mapping to values
-  # @return [String] `"OK"`
-  #
-  # @see #hmset
-  def mapped_hmset(key, hash)
-    hmset(key, hash.to_a.flatten)
-  end
-
-  # Get the value of a hash field.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @return [String]
-  def hget(key, field)
-    synchronize do |client|
-      client.call([:hget, key, field])
-    end
-  end
-
-  # Get the values of all the given hash fields.
-  #
-  # @example
-  #   redis.hmget("hash", "f1", "f2")
-  #     # => ["v1", "v2"]
-  #
-  # @param [String] key
-  # @param [Array<String>] fields array of fields
-  # @return [Array<String>] an array of values for the specified fields
-  #
-  # @see #mapped_hmget
-  def hmget(key, *fields, &blk)
-    synchronize do |client|
-      client.call([:hmget, key] + fields, &blk)
-    end
-  end
-
-  # Get the values of all the given hash fields.
-  #
-  # @example
-  #   redis.mapped_hmget("hash", "f1", "f2")
-  #     # => { "f1" => "v1", "f2" => "v2" }
-  #
-  # @param [String] key
-  # @param [Array<String>] fields array of fields
-  # @return [Hash] a hash mapping the specified fields to their values
-  #
-  # @see #hmget
-  def mapped_hmget(key, *fields)
-    hmget(key, *fields) do |reply|
-      if reply.kind_of?(Array)
-        Hash[fields.zip(reply)]
-      else
-        reply
-      end
-    end
-  end
-
-  # Delete one or more hash fields.
-  #
-  # @param [String] key
-  # @param [String, Array<String>] field
-  # @return [Fixnum] the number of fields that were removed from the hash
-  def hdel(key, field)
-    synchronize do |client|
-      client.call([:hdel, key, field])
-    end
-  end
-
-  # Determine if a hash field exists.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @return [Boolean] whether or not the field exists in the hash
-  def hexists(key, field)
-    synchronize do |client|
-      client.call([:hexists, key, field], &Boolify)
-    end
-  end
-
-  # Increment the integer value of a hash field by the given integer number.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @param [Fixnum] increment
-  # @return [Fixnum] value of the field after incrementing it
-  def hincrby(key, field, increment)
-    synchronize do |client|
-      client.call([:hincrby, key, field, increment])
-    end
-  end
-
-  # Increment the numeric value of a hash field by the given float number.
-  #
-  # @param [String] key
-  # @param [String] field
-  # @param [Float] increment
-  # @return [Float] value of the field after incrementing it
-  def hincrbyfloat(key, field, increment)
-    synchronize do |client|
-      client.call([:hincrbyfloat, key, field, increment], &Floatify)
-    end
-  end
-
-  # Get all the fields in a hash.
-  #
-  # @param [String] key
-  # @return [Array<String>]
-  def hkeys(key)
-    synchronize do |client|
-      client.call([:hkeys, key])
-    end
-  end
-
-  # Get all the values in a hash.
-  #
-  # @param [String] key
-  # @return [Array<String>]
-  def hvals(key)
-    synchronize do |client|
-      client.call([:hvals, key])
-    end
-  end
-
-  # Get all the fields and values in a hash.
-  #
-  # @param [String] key
-  # @return [Hash<String, String>]
-  def hgetall(key)
-    synchronize do |client|
-      client.call([:hgetall, key], &Hashify)
-    end
-  end
-
-  # Post a message to a channel.
-  def publish(channel, message)
-    synchronize do |client|
-      client.call([:publish, channel, message])
-    end
-  end
-
-  def subscribed?
-    synchronize do |client|
-      client.kind_of? SubscribedClient
-    end
-  end
-
-  # Listen for messages published to the given channels.
-  def subscribe(*channels, &block)
-    synchronize do |client|
-      _subscription(:subscribe, 0, channels, block)
-    end
-  end
-
-  # Listen for messages published to the given channels. Throw a timeout error if there is no messages for a timeout period.
-  def subscribe_with_timeout(timeout, *channels, &block)
-    synchronize do |client|
-      _subscription(:subscribe_with_timeout, timeout, channels, block)
-    end
-  end
-
-  # Stop listening for messages posted to the given channels.
-  def unsubscribe(*channels)
-    synchronize do |client|
-      raise RuntimeError, "Can't unsubscribe if not subscribed." unless subscribed?
-      client.unsubscribe(*channels)
-    end
-  end
-
-  # Listen for messages published to channels matching the given patterns.
-  def psubscribe(*channels, &block)
-    synchronize do |client|
-      _subscription(:psubscribe, 0, channels, block)
-    end
-  end
-
-  # Listen for messages published to channels matching the given patterns. Throw a timeout error if there is no messages for a timeout period.
-  def psubscribe_with_timeout(timeout, *channels, &block)
-    synchronize do |client|
-      _subscription(:psubscribe_with_timeout, timeout, channels, block)
-    end
-  end
-
-  # Stop listening for messages posted to channels matching the given patterns.
-  def punsubscribe(*channels)
-    synchronize do |client|
-      raise RuntimeError, "Can't unsubscribe if not subscribed." unless subscribed?
-      client.punsubscribe(*channels)
-    end
-  end
-
-  # Inspect the state of the Pub/Sub subsystem.
-  # Possible subcommands: channels, numsub, numpat.
-  def pubsub(subcommand, *args)
-    synchronize do |client|
-      client.call([:pubsub, subcommand] + args)
-    end
-  end
-
-  # Watch the given keys to determine execution of the MULTI/EXEC block.
-  #
-  # Using a block is optional, but is necessary for thread-safety.
-  #
-  # An `#unwatch` is automatically issued if an exception is raised within the
-  # block that is a subclass of StandardError and is not a ConnectionError.
-  #
-  # @example With a block
-  #   redis.watch("key") do
-  #     if redis.get("key") == "some value"
-  #       redis.multi do |multi|
-  #         multi.set("key", "other value")
-  #         multi.incr("counter")
-  #       end
-  #     else
-  #       redis.unwatch
-  #     end
-  #   end
-  #     # => ["OK", 6]
-  #
-  # @example Without a block
-  #   redis.watch("key")
-  #     # => "OK"
-  #
-  # @param [String, Array<String>] keys one or more keys to watch
-  # @return [Object] if using a block, returns the return value of the block
-  # @return [String] if not using a block, returns `OK`
-  #
-  # @see #unwatch
-  # @see #multi
-  def watch(*keys)
-    synchronize do |client|
-      res = client.call([:watch] + keys)
-
-      if block_given?
-        begin
-          yield(self)
-        rescue ConnectionError
-          raise
-        rescue StandardError
-          unwatch
-          raise
-        end
-      else
-        res
-      end
-    end
-  end
-
-  # Forget about all watched keys.
-  #
-  # @return [String] `OK`
-  #
-  # @see #watch
-  # @see #multi
-  def unwatch
-    synchronize do |client|
-      client.call([:unwatch])
-    end
-  end
-
-  def pipelined
-    synchronize do |client|
-      begin
-        original, @client = @client, Pipeline.new
-        yield(self)
-        original.call_pipeline(@client)
-      ensure
-        @client = original
-      end
-    end
-  end
-
-  # Mark the start of a transaction block.
-  #
-  # Passing a block is optional.
-  #
-  # @example With a block
-  #   redis.multi do |multi|
-  #     multi.set("key", "value")
-  #     multi.incr("counter")
-  #   end # => ["OK", 6]
-  #
-  # @example Without a block
-  #   redis.multi
-  #     # => "OK"
-  #   redis.set("key", "value")
-  #     # => "QUEUED"
-  #   redis.incr("counter")
-  #     # => "QUEUED"
-  #   redis.exec
-  #     # => ["OK", 6]
-  #
-  # @yield [multi] the commands that are called inside this block are cached
-  #   and written to the server upon returning from it
-  # @yieldparam [Redis] multi `self`
-  #
-  # @return [String, Array<...>]
-  #   - when a block is not given, `OK`
-  #   - when a block is given, an array with replies
-  #
-  # @see #watch
-  # @see #unwatch
-  def multi
-    synchronize do |client|
-      if !block_given?
-        client.call([:multi])
-      else
-        begin
-          pipeline = Pipeline::Multi.new
-          original, @client = @client, pipeline
-          yield(self)
-          original.call_pipeline(pipeline)
-        ensure
-          @client = original
-        end
-      end
-    end
-  end
-
-  # Execute all commands issued after MULTI.
-  #
-  # Only call this method when `#multi` was called **without** a block.
-  #
-  # @return [nil, Array<...>]
-  #   - when commands were not executed, `nil`
-  #   - when commands were executed, an array with their replies
-  #
-  # @see #multi
-  # @see #discard
-  def exec
-    synchronize do |client|
-      client.call([:exec])
-    end
-  end
-
-  # Discard all commands issued after MULTI.
-  #
-  # Only call this method when `#multi` was called **without** a block.
-  #
-  # @return [String] `"OK"`
-  #
-  # @see #multi
-  # @see #exec
-  def discard
-    synchronize do |client|
-      client.call([:discard])
-    end
-  end
-
-  # Control remote script registry.
-  #
-  # @example Load a script
-  #   sha = redis.script(:load, "return 1")
-  #     # => <sha of this script>
-  # @example Check if a script exists
-  #   redis.script(:exists, sha)
-  #     # => true
-  # @example Check if multiple scripts exist
-  #   redis.script(:exists, [sha, other_sha])
-  #     # => [true, false]
-  # @example Flush the script registry
-  #   redis.script(:flush)
-  #     # => "OK"
-  # @example Kill a running script
-  #   redis.script(:kill)
-  #     # => "OK"
-  #
-  # @param [String] subcommand e.g. `exists`, `flush`, `load`, `kill`
-  # @param [Array<String>] args depends on subcommand
-  # @return [String, Boolean, Array<Boolean>, ...] depends on subcommand
-  #
-  # @see #eval
-  # @see #evalsha
-  def script(subcommand, *args)
-    subcommand = subcommand.to_s.downcase
-
-    if subcommand == "exists"
-      synchronize do |client|
-        arg = args.first
-
-        client.call([:script, :exists, arg]) do |reply|
-          reply = reply.map { |r| Boolify.call(r) }
-
-          if arg.is_a?(Array)
-            reply
-          else
-            reply.first
-          end
-        end
-      end
-    else
-      synchronize do |client|
-        client.call([:script, subcommand] + args)
-      end
-    end
-  end
-
-  def _eval(cmd, args)
-    script = args.shift
-    options = args.pop if args.last.is_a?(Hash)
-    options ||= {}
-
-    keys = args.shift || options[:keys] || []
-    argv = args.shift || options[:argv] || []
-
-    synchronize do |client|
-      client.call([cmd, script, keys.length] + keys + argv)
-    end
-  end
-
-  # Evaluate Lua script.
-  #
-  # @example EVAL without KEYS nor ARGV
-  #   redis.eval("return 1")
-  #     # => 1
-  # @example EVAL with KEYS and ARGV as array arguments
-  #   redis.eval("return { KEYS, ARGV }", ["k1", "k2"], ["a1", "a2"])
-  #     # => [["k1", "k2"], ["a1", "a2"]]
-  # @example EVAL with KEYS and ARGV in a hash argument
-  #   redis.eval("return { KEYS, ARGV }", :keys => ["k1", "k2"], :argv => ["a1", "a2"])
-  #     # => [["k1", "k2"], ["a1", "a2"]]
-  #
-  # @param [Array<String>] keys optional array with keys to pass to the script
-  # @param [Array<String>] argv optional array with arguments to pass to the script
-  # @param [Hash] options
-  #   - `:keys => Array<String>`: optional array with keys to pass to the script
-  #   - `:argv => Array<String>`: optional array with arguments to pass to the script
-  # @return depends on the script
-  #
-  # @see #script
-  # @see #evalsha
-  def eval(*args)
-    _eval(:eval, args)
-  end
-
-  # Evaluate Lua script by its SHA.
-  #
-  # @example EVALSHA without KEYS nor ARGV
-  #   redis.evalsha(sha)
-  #     # => <depends on script>
-  # @example EVALSHA with KEYS and ARGV as array arguments
-  #   redis.evalsha(sha, ["k1", "k2"], ["a1", "a2"])
-  #     # => <depends on script>
-  # @example EVALSHA with KEYS and ARGV in a hash argument
-  #   redis.evalsha(sha, :keys => ["k1", "k2"], :argv => ["a1", "a2"])
-  #     # => <depends on script>
-  #
-  # @param [Array<String>] keys optional array with keys to pass to the script
-  # @param [Array<String>] argv optional array with arguments to pass to the script
-  # @param [Hash] options
-  #   - `:keys => Array<String>`: optional array with keys to pass to the script
-  #   - `:argv => Array<String>`: optional array with arguments to pass to the script
-  # @return depends on the script
-  #
-  # @see #script
-  # @see #eval
-  def evalsha(*args)
-    _eval(:evalsha, args)
-  end
-
-  def _scan(command, cursor, args, options = {}, &block)
-    # SSCAN/ZSCAN/HSCAN already prepend the key to +args+.
-
-    args << cursor
-
-    if match = options[:match]
-      args.concat(["MATCH", match])
-    end
-
-    if count = options[:count]
-      args.concat(["COUNT", count])
-    end
-
-    synchronize do |client|
-      client.call([command] + args, &block)
-    end
-  end
-
-  # Scan the keyspace
-  #
-  # @example Retrieve the first batch of keys
-  #   redis.scan(0)
-  #     # => ["4", ["key:21", "key:47", "key:42"]]
-  # @example Retrieve a batch of keys matching a pattern
-  #   redis.scan(4, :match => "key:1?")
-  #     # => ["92", ["key:13", "key:18"]]
-  #
-  # @param [String, Integer] cursor the cursor of the iteration
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [String, Array<String>] the next cursor and all found keys
-  def scan(cursor, options={})
-    _scan(:scan, cursor, [], options)
-  end
-
-  # Scan the keyspace
-  #
-  # @example Retrieve all of the keys (with possible duplicates)
-  #   redis.scan_each.to_a
-  #     # => ["key:21", "key:47", "key:42"]
-  # @example Execute block for each key matching a pattern
-  #   redis.scan_each(:match => "key:1?") {|key| puts key}
-  #     # => key:13
-  #     # => key:18
-  #
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [Enumerator] an enumerator for all found keys
-  def scan_each(options={}, &block)
-    return to_enum(:scan_each, options) unless block_given?
-    cursor = 0
-    loop do
-      cursor, keys = scan(cursor, options)
-      keys.each(&block)
-      break if cursor == "0"
-    end
-  end
-
-  # Scan a hash
-  #
-  # @example Retrieve the first batch of key/value pairs in a hash
-  #   redis.hscan("hash", 0)
-  #
-  # @param [String, Integer] cursor the cursor of the iteration
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [String, Array<[String, String]>] the next cursor and all found keys
-  def hscan(key, cursor, options={})
-    _scan(:hscan, cursor, [key], options) do |reply|
-      [reply[0], reply[1].each_slice(2).to_a]
-    end
-  end
-
-  # Scan a hash
-  #
-  # @example Retrieve all of the key/value pairs in a hash
-  #   redis.hscan_each("hash").to_a
-  #   # => [["key70", "70"], ["key80", "80"]]
-  #
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [Enumerator] an enumerator for all found keys
-  def hscan_each(key, options={}, &block)
-    return to_enum(:hscan_each, key, options) unless block_given?
-    cursor = 0
-    loop do
-      cursor, values = hscan(key, cursor, options)
-      values.each(&block)
-      break if cursor == "0"
-    end
-  end
-
-  # Scan a sorted set
-  #
-  # @example Retrieve the first batch of key/value pairs in a hash
-  #   redis.zscan("zset", 0)
-  #
-  # @param [String, Integer] cursor the cursor of the iteration
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [String, Array<[String, Float]>] the next cursor and all found
-  #   members and scores
-  def zscan(key, cursor, options={})
-    _scan(:zscan, cursor, [key], options) do |reply|
-      [reply[0], FloatifyPairs.call(reply[1])]
-    end
-  end
-
-  # Scan a sorted set
-  #
-  # @example Retrieve all of the members/scores in a sorted set
-  #   redis.zscan_each("zset").to_a
-  #   # => [["key70", "70"], ["key80", "80"]]
-  #
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [Enumerator] an enumerator for all found scores and members
-  def zscan_each(key, options={}, &block)
-    return to_enum(:zscan_each, key, options) unless block_given?
-    cursor = 0
-    loop do
-      cursor, values = zscan(key, cursor, options)
-      values.each(&block)
-      break if cursor == "0"
-    end
-  end
-
-  # Scan a set
-  #
-  # @example Retrieve the first batch of keys in a set
-  #   redis.sscan("set", 0)
-  #
-  # @param [String, Integer] cursor the cursor of the iteration
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [String, Array<String>] the next cursor and all found members
-  def sscan(key, cursor, options={})
-    _scan(:sscan, cursor, [key], options)
-  end
-
-  # Scan a set
-  #
-  # @example Retrieve all of the keys in a set
-  #   redis.sscan_each("set").to_a
-  #   # => ["key1", "key2", "key3"]
-  #
-  # @param [Hash] options
-  #   - `:match => String`: only return keys matching the pattern
-  #   - `:count => Integer`: return count keys at most per iteration
-  #
-  # @return [Enumerator] an enumerator for all keys in the set
-  def sscan_each(key, options={}, &block)
-    return to_enum(:sscan_each, key, options) unless block_given?
-    cursor = 0
-    loop do
-      cursor, keys = sscan(key, cursor, options)
-      keys.each(&block)
-      break if cursor == "0"
-    end
-  end
-
-  # Add one or more members to a HyperLogLog structure.
-  #
-  # @param [String] key
-  # @param [String, Array<String>] member one member, or array of members
-  # @return [Boolean] true if at least 1 HyperLogLog internal register was altered. false otherwise.
-  def pfadd(key, member)
-    synchronize do |client|
-      client.call([:pfadd, key, member], &Boolify)
-    end
-  end
-
-  # Get the approximate cardinality of members added to HyperLogLog structure.
-  #
-  # If called with multiple keys, returns the approximate cardinality of the
-  # union of the HyperLogLogs contained in the keys.
-  #
-  # @param [String, Array<String>] keys
-  # @return [Fixnum]
-  def pfcount(*keys)
-    synchronize do |client|
-      client.call([:pfcount] + keys)
-    end
-  end
-
-  # Merge multiple HyperLogLog values into an unique value that will approximate the cardinality of the union of
-  # the observed Sets of the source HyperLogLog structures.
-  #
-  # @param [String] dest_key destination key
-  # @param [String, Array<String>] source_key source key, or array of keys
-  # @return [Boolean]
-  def pfmerge(dest_key, *source_key)
-    synchronize do |client|
-      client.call([:pfmerge, dest_key, *source_key], &BoolifySet)
-    end
-  end
-
-  # Interact with the sentinel command (masters, master, slaves, failover)
-  #
-  # @param [String] subcommand e.g. `masters`, `master`, `slaves`
-  # @param [Array<String>] args depends on subcommand
-  # @return [Array<String>, Hash<String, String>, String] depends on subcommand
-  def sentinel(subcommand, *args)
-    subcommand = subcommand.to_s.downcase
-    synchronize do |client|
-      client.call([:sentinel, subcommand] + args) do |reply|
-        case subcommand
-        when "get-master-addr-by-name"
-          reply
-        else
-          if reply.kind_of?(Array)
-            if reply[0].kind_of?(Array)
-              reply.map(&Hashify)
-            else
-              Hashify.call(reply)
-            end
-          else
-            reply
-          end
-        end
-      end
-    end
-  end
-
-  def id
-    @original_client.id
-  end
-
-  def inspect
-    "#<Redis client v#{Redis::VERSION} for #{id}>"
-  end
-
-  def dup
-    self.class.new(@options)
-  end
-
-  def method_missing(command, *args)
-    synchronize do |client|
-      client.call([command] + args)
-    end
-  end
-
-private
-
-  # Commands returning 1 for true and 0 for false may be executed in a pipeline
-  # where the method call will return nil. Propagate the nil instead of falsely
-  # returning false.
-  Boolify =
-    lambda { |value|
-      value == 1 if value
-    }
-
-  BoolifySet =
-    lambda { |value|
-      if value && "OK" == value
-        true
-      else
-        false
-      end
-    }
-
-  Hashify =
-    lambda { |array|
-      hash = Hash.new
-      array.each_slice(2) do |field, value|
-        hash[field] = value
-      end
-      hash
-    }
-
-  Floatify =
-    lambda { |str|
-      if str
-        if (inf = str.match(/^(-)?inf/i))
-          (inf[1] ? -1.0 : 1.0) / 0.0
-        else
-          Float(str)
-        end
-      end
-    }
-
-  FloatifyPairs =
-    lambda { |array|
-      if array
-        array.each_slice(2).map do |member, score|
-          [member, Floatify.call(score)]
-        end
-      end
-    }
-
-  def _subscription(method, timeout, channels, block)
-    return @client.call([method] + channels) if subscribed?
-
-    begin
-      original, @client = @client, SubscribedClient.new(@client)
-      if timeout > 0
-        @client.send(method, timeout, *channels, &block)
-      else
-        @client.send(method, *channels, &block)
-      end
-    ensure
-      @client = original
-    end
-  end
-
-end
-
-require "redis/version"
-require "redis/connection"
-require "redis/client"
-require "redis/pipeline"
-require "redis/subscribe"
diff --git a/lib/vendor/redis/lib/redis/client.rb b/lib/vendor/redis/lib/redis/client.rb
deleted file mode 100644
index 31be2de..0000000
--- a/lib/vendor/redis/lib/redis/client.rb
+++ /dev/null
@@ -1,590 +0,0 @@
-require "redis/errors"
-require "socket"
-require "cgi"
-
-class Redis
-  class Client
-
-    DEFAULTS = {
-      :url => lambda { ENV["REDIS_URL"] },
-      :scheme => "redis",
-      :host => "127.0.0.1",
-      :port => 6379,
-      :path => nil,
-      :timeout => 5.0,
-      :password => nil,
-      :db => 0,
-      :driver => nil,
-      :id => nil,
-      :tcp_keepalive => 0,
-      :reconnect_attempts => 1,
-      :inherit_socket => false
-    }
-
-    def options
-      Marshal.load(Marshal.dump(@options))
-    end
-
-    def scheme
-      @options[:scheme]
-    end
-
-    def host
-      @options[:host]
-    end
-
-    def port
-      @options[:port]
-    end
-
-    def path
-      @options[:path]
-    end
-
-    def read_timeout
-      @options[:read_timeout]
-    end
-
-    def connect_timeout
-      @options[:connect_timeout]
-    end
-
-    def timeout
-      @options[:read_timeout]
-    end
-
-    def password
-      @options[:password]
-    end
-
-    def db
-      @options[:db]
-    end
-
-    def db=(db)
-      @options[:db] = db.to_i
-    end
-
-    def driver
-      @options[:driver]
-    end
-
-    def inherit_socket?
-      @options[:inherit_socket]
-    end
-
-    attr_accessor :logger
-    attr_reader :connection
-    attr_reader :command_map
-
-    def initialize(options = {})
-      @options = _parse_options(options)
-      @reconnect = true
-      @logger = @options[:logger]
-      @connection = nil
-      @command_map = {}
-
-      @pending_reads = 0
-
-      if options.include?(:sentinels)
-        @connector = Connector::Sentinel.new(@options)
-      else
-        @connector = Connector.new(@options)
-      end
-    end
-
-    def connect
-      @pid = Process.pid
-
-      # Don't try to reconnect when the connection is fresh
-      with_reconnect(false) do
-        establish_connection
-        call [:auth, password] if password
-        call [:select, db] if db != 0
-        call [:client, :setname, @options[:id]] if @options[:id]
-        @connector.check(self)
-      end
-
-      self
-    end
-
-    def id
-      @options[:id] || "redis://#{location}/#{db}"
-    end
-
-    def location
-      path || "#{host}:#{port}"
-    end
-
-    def call(command)
-      reply = process([command]) { read }
-      raise reply if reply.is_a?(CommandError)
-
-      if block_given?
-        yield reply
-      else
-        reply
-      end
-    end
-
-    def call_loop(command, timeout = 0)
-      error = nil
-
-      result = with_socket_timeout(timeout) do
-        process([command]) do
-          loop do
-            reply = read
-            if reply.is_a?(CommandError)
-              error = reply
-              break
-            else
-              yield reply
-            end
-          end
-        end
-      end
-
-      # Raise error when previous block broke out of the loop.
-      raise error if error
-
-      # Result is set to the value that the provided block used to break.
-      result
-    end
-
-    def call_pipeline(pipeline)
-      with_reconnect pipeline.with_reconnect? do
-        begin
-          pipeline.finish(call_pipelined(pipeline.commands)).tap do
-            self.db = pipeline.db if pipeline.db
-          end
-        rescue ConnectionError => e
-          return nil if pipeline.shutdown?
-          # Assume the pipeline was sent in one piece, but execution of
-          # SHUTDOWN caused none of the replies for commands that were executed
-          # prior to it from coming back around.
-          raise e
-        end
-      end
-    end
-
-    def call_pipelined(commands)
-      return [] if commands.empty?
-
-      # The method #ensure_connected (called from #process) reconnects once on
-      # I/O errors. To make an effort in making sure that commands are not
-      # executed more than once, only allow reconnection before the first reply
-      # has been read. When an error occurs after the first reply has been
-      # read, retrying would re-execute the entire pipeline, thus re-issuing
-      # already successfully executed commands. To circumvent this, don't retry
-      # after the first reply has been read successfully.
-
-      result = Array.new(commands.size)
-      reconnect = @reconnect
-
-      begin
-        exception = nil
-
-        process(commands) do
-          result[0] = read
-
-          @reconnect = false
-
-          (commands.size - 1).times do |i|
-            reply = read
-            result[i + 1] = reply
-            exception = reply if exception.nil? && reply.is_a?(CommandError)
-          end
-        end
-
-        raise exception if exception
-      ensure
-        @reconnect = reconnect
-      end
-
-      result
-    end
-
-    def call_with_timeout(command, timeout, &blk)
-      with_socket_timeout(timeout) do
-        call(command, &blk)
-      end
-    rescue ConnectionError
-      retry
-    end
-
-    def call_without_timeout(command, &blk)
-      call_with_timeout(command, 0, &blk)
-    end
-
-    def process(commands)
-      logging(commands) do
-        ensure_connected do
-          commands.each do |command|
-            if command_map[command.first]
-              command = command.dup
-              command[0] = command_map[command.first]
-            end
-
-            write(command)
-          end
-
-          yield if block_given?
-        end
-      end
-    end
-
-    def connected?
-      !! (connection && connection.connected?)
-    end
-
-    def disconnect
-      connection.disconnect if connected?
-    end
-
-    def reconnect
-      disconnect
-      connect
-    end
-
-    def io
-      yield
-    rescue TimeoutError => e1
-      # Add a message to the exception without destroying the original stack
-      e2 = TimeoutError.new("Connection timed out")
-      e2.set_backtrace(e1.backtrace)
-      raise e2
-    rescue Errno::ECONNRESET, Errno::EPIPE, Errno::ECONNABORTED, Errno::EBADF, Errno::EINVAL => e
-      raise ConnectionError, "Connection lost (%s)" % [e.class.name.split("::").last]
-    end
-
-    def read
-      io do
-        value = connection.read
-        @pending_reads -= 1
-        value
-      end
-    end
-
-    def write(command)
-      io do
-        @pending_reads += 1
-        connection.write(command)
-      end
-    end
-
-    def with_socket_timeout(timeout)
-      connect unless connected?
-
-      begin
-        connection.timeout = timeout
-        yield
-      ensure
-        connection.timeout = self.timeout if connected?
-      end
-    end
-
-    def without_socket_timeout(&blk)
-      with_socket_timeout(0, &blk)
-    end
-
-    def with_reconnect(val=true)
-      begin
-        original, @reconnect = @reconnect, val
-        yield
-      ensure
-        @reconnect = original
-      end
-    end
-
-    def without_reconnect(&blk)
-      with_reconnect(false, &blk)
-    end
-
-  protected
-
-    def logging(commands)
-      return yield unless @logger && @logger.debug?
-
-      begin
-        commands.each do |name, *args|
-          logged_args = args.map do |a|
-            case
-            when a.respond_to?(:inspect) then a.inspect
-            when a.respond_to?(:to_s)    then a.to_s
-            else
-              # handle poorly-behaved descendants of BasicObject
-              klass = a.instance_exec { (class << self; self end).superclass }
-              "\#<#{klass}:#{a.__id__}>"
-            end
-          end
-          @logger.debug("[Redis] command=#{name.to_s.upcase} args=#{logged_args.join(' ')}")
-        end
-
-        t1 = Time.now
-        yield
-      ensure
-        @logger.debug("[Redis] call_time=%0.2f ms" % ((Time.now - t1) * 1000)) if t1
-      end
-    end
-
-    def establish_connection
-      server = @connector.resolve.dup
-
-      @options[:host] = server[:host]
-      @options[:port] = Integer(server[:port]) if server.include?(:port)
-
-      @connection = @options[:driver].connect(@options)
-      @pending_reads = 0
-    rescue TimeoutError,
-           Errno::ECONNREFUSED,
-           Errno::EHOSTDOWN,
-           Errno::EHOSTUNREACH,
-           Errno::ENETUNREACH,
-           Errno::ETIMEDOUT
-
-      raise CannotConnectError, "Error connecting to Redis on #{location} (#{$!.class})"
-    end
-
-    def ensure_connected
-      disconnect if @pending_reads > 0
-
-      attempts = 0
-
-      begin
-        attempts += 1
-
-        if connected?
-          unless inherit_socket? || Process.pid == @pid
-            raise InheritedError,
-              "Tried to use a connection from a child process without reconnecting. " +
-              "You need to reconnect to Redis after forking " +
-              "or set :inherit_socket to true."
-          end
-        else
-          connect
-        end
-
-        yield
-      rescue BaseConnectionError
-        disconnect
-
-        if attempts <= @options[:reconnect_attempts] && @reconnect
-          retry
-        else
-          raise
-        end
-      rescue Exception
-        disconnect
-        raise
-      end
-    end
-
-    def _parse_options(options)
-      return options if options[:_parsed]
-
-      defaults = DEFAULTS.dup
-      options = options.dup
-
-      defaults.keys.each do |key|
-        # Fill in defaults if needed
-        if defaults[key].respond_to?(:call)
-          defaults[key] = defaults[key].call
-        end
-
-        # Symbolize only keys that are needed
-        options[key] = options[key.to_s] if options.has_key?(key.to_s)
-      end
-
-      url = options[:url] || defaults[:url]
-
-      # Override defaults from URL if given
-      if url
-        require "uri"
-
-        uri = URI(url)
-
-        if uri.scheme == "unix"
-          defaults[:path]   = uri.path
-        elsif uri.scheme == "redis" || uri.scheme == "rediss"
-          defaults[:scheme]   = uri.scheme
-          defaults[:host]     = uri.host if uri.host
-          defaults[:port]     = uri.port if uri.port
-          defaults[:password] = CGI.unescape(uri.password) if uri.password
-          defaults[:db]       = uri.path[1..-1].to_i if uri.path
-          defaults[:role] = :master
-        else
-          raise ArgumentError, "invalid uri scheme '#{uri.scheme}'"
-        end
-
-        defaults[:ssl] = true if uri.scheme == "rediss"
-      end
-
-      # Use default when option is not specified or nil
-      defaults.keys.each do |key|
-        options[key] = defaults[key] if options[key].nil?
-      end
-
-      if options[:path]
-        # Unix socket
-        options[:scheme] = "unix"
-        options.delete(:host)
-        options.delete(:port)
-      else
-        # TCP socket
-        options[:host] = options[:host].to_s
-        options[:port] = options[:port].to_i
-      end
-
-      if options.has_key?(:timeout)
-        options[:connect_timeout] ||= options[:timeout]
-        options[:read_timeout]    ||= options[:timeout]
-        options[:write_timeout]   ||= options[:timeout]
-      end
-
-      options[:connect_timeout] = Float(options[:connect_timeout])
-      options[:read_timeout]    = Float(options[:read_timeout])
-      options[:write_timeout]   = Float(options[:write_timeout])
-
-      options[:db] = options[:db].to_i
-      options[:driver] = _parse_driver(options[:driver]) || Connection.drivers.last
-
-      case options[:tcp_keepalive]
-      when Hash
-        [:time, :intvl, :probes].each do |key|
-          unless options[:tcp_keepalive][key].is_a?(Integer)
-            raise "Expected the #{key.inspect} key in :tcp_keepalive to be an Integer"
-          end
-        end
-
-      when Integer
-        if options[:tcp_keepalive] >= 60
-          options[:tcp_keepalive] = {:time => options[:tcp_keepalive] - 20, :intvl => 10, :probes => 2}
-
-        elsif options[:tcp_keepalive] >= 30
-          options[:tcp_keepalive] = {:time => options[:tcp_keepalive] - 10, :intvl => 5, :probes => 2}
-
-        elsif options[:tcp_keepalive] >= 5
-          options[:tcp_keepalive] = {:time => options[:tcp_keepalive] - 2, :intvl => 2, :probes => 1}
-        end
-      end
-
-      options[:_parsed] = true
-
-      options
-    end
-
-    def _parse_driver(driver)
-      driver = driver.to_s if driver.is_a?(Symbol)
-
-      if driver.kind_of?(String)
-        begin
-          require "redis/connection/#{driver}"
-          driver = Connection.const_get(driver.capitalize)
-        rescue LoadError, NameError
-          raise RuntimeError, "Cannot load driver #{driver.inspect}"
-        end
-      end
-
-      driver
-    end
-
-    class Connector
-      def initialize(options)
-        @options = options.dup
-      end
-
-      def resolve
-        @options
-      end
-
-      def check(client)
-      end
-
-      class Sentinel < Connector
-        def initialize(options)
-          super(options)
-
-          @options[:password] = DEFAULTS.fetch(:password)
-          @options[:db] = DEFAULTS.fetch(:db)
-
-          @sentinels = @options.delete(:sentinels).dup
-          @role = @options.fetch(:role, "master").to_s
-          @master = @options[:host]
-        end
-
-        def check(client)
-          # Check the instance is really of the role we are looking for.
-          # We can't assume the command is supported since it was introduced
-          # recently and this client should work with old stuff.
-          begin
-            role = client.call([:role])[0]
-          rescue Redis::CommandError
-            # Assume the test is passed if we can't get a reply from ROLE...
-            role = @role
-          end
-
-          if role != @role
-            client.disconnect
-            raise ConnectionError, "Instance role mismatch. Expected #{@role}, got #{role}."
-          end
-        end
-
-        def resolve
-          result = case @role
-                   when "master"
-                     resolve_master
-                   when "slave"
-                     resolve_slave
-                   else
-                     raise ArgumentError, "Unknown instance role #{@role}"
-                   end
-
-          result || (raise ConnectionError, "Unable to fetch #{@role} via Sentinel.")
-        end
-
-        def sentinel_detect
-          @sentinels.each do |sentinel|
-            client = Client.new(@options.merge({
-              :host => sentinel[:host],
-              :port => sentinel[:port],
-              :reconnect_attempts => 0,
-            }))
-
-            begin
-              if result = yield(client)
-                # This sentinel responded. Make sure we ask it first next time.
-                @sentinels.delete(sentinel)
-                @sentinels.unshift(sentinel)
-
-                return result
-              end
-            rescue BaseConnectionError
-            ensure
-              client.disconnect
-            end
-          end
-
-          raise CannotConnectError, "No sentinels available."
-        end
-
-        def resolve_master
-          sentinel_detect do |client|
-            if reply = client.call(["sentinel", "get-master-addr-by-name", @master])
-              {:host => reply[0], :port => reply[1]}
-            end
-          end
-        end
-
-        def resolve_slave
-          sentinel_detect do |client|
-            if reply = client.call(["sentinel", "slaves", @master])
-              slave = Hash[*reply.sample]
-
-              {:host => slave.fetch("ip"), :port => slave.fetch("port")}
-            end
-          end
-        end
-      end
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/connection.rb b/lib/vendor/redis/lib/redis/connection.rb
deleted file mode 100644
index badff22..0000000
--- a/lib/vendor/redis/lib/redis/connection.rb
+++ /dev/null
@@ -1,9 +0,0 @@
-require "redis/connection/registry"
-
-# If a connection driver was required before this file, the array
-# Redis::Connection.drivers will contain one or more classes. The last driver
-# in this array will be used as default driver. If this array is empty, we load
-# the plain Ruby driver as our default. Another driver can be required at a
-# later point in time, causing it to be the last element of the #drivers array
-# and therefore be chosen by default.
-require "redis/connection/ruby" if Redis::Connection.drivers.empty?
\ No newline at end of file
diff --git a/lib/vendor/redis/lib/redis/connection/command_helper.rb b/lib/vendor/redis/lib/redis/connection/command_helper.rb
deleted file mode 100644
index 74e89dc..0000000
--- a/lib/vendor/redis/lib/redis/connection/command_helper.rb
+++ /dev/null
@@ -1,44 +0,0 @@
-class Redis
-  module Connection
-    module CommandHelper
-
-      COMMAND_DELIMITER = "\r\n"
-
-      def build_command(args)
-        command = [nil]
-
-        args.each do |i|
-          if i.is_a? Array
-            i.each do |j|
-              j = j.to_s
-              command << "$#{j.bytesize}"
-              command << j
-            end
-          else
-            i = i.to_s
-            command << "$#{i.bytesize}"
-            command << i
-          end
-        end
-
-        command[0] = "*#{(command.length - 1) / 2}"
-
-        # Trailing delimiter
-        command << ""
-        command.join(COMMAND_DELIMITER)
-      end
-
-    protected
-
-      if defined?(Encoding::default_external)
-        def encode(string)
-          string.force_encoding(Encoding::default_external)
-        end
-      else
-        def encode(string)
-          string
-        end
-      end
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/connection/hiredis.rb b/lib/vendor/redis/lib/redis/connection/hiredis.rb
deleted file mode 100644
index f4056d3..0000000
--- a/lib/vendor/redis/lib/redis/connection/hiredis.rb
+++ /dev/null
@@ -1,66 +0,0 @@
-require "redis/connection/registry"
-require "redis/errors"
-require "hiredis/connection"
-require "timeout"
-
-class Redis
-  module Connection
-    class Hiredis
-
-      def self.connect(config)
-        connection = ::Hiredis::Connection.new
-        connect_timeout = (config.fetch(:connect_timeout, 0) * 1_000_000).to_i
-
-        if config[:scheme] == "unix"
-          connection.connect_unix(config[:path], connect_timeout)
-        elsif config[:scheme] == "rediss" || config[:ssl]
-          raise NotImplementedError, "SSL not supported by hiredis driver"
-        else
-          connection.connect(config[:host], config[:port], connect_timeout)
-        end
-
-        instance = new(connection)
-        instance.timeout = config[:read_timeout]
-        instance
-      rescue Errno::ETIMEDOUT
-        raise TimeoutError
-      end
-
-      def initialize(connection)
-        @connection = connection
-      end
-
-      def connected?
-        @connection && @connection.connected?
-      end
-
-      def timeout=(timeout)
-        # Hiredis works with microsecond timeouts
-        @connection.timeout = Integer(timeout * 1_000_000)
-      end
-
-      def disconnect
-        @connection.disconnect
-        @connection = nil
-      end
-
-      def write(command)
-        @connection.write(command.flatten(1))
-      rescue Errno::EAGAIN
-        raise TimeoutError
-      end
-
-      def read
-        reply = @connection.read
-        reply = CommandError.new(reply.message) if reply.is_a?(RuntimeError)
-        reply
-      rescue Errno::EAGAIN
-        raise TimeoutError
-      rescue RuntimeError => err
-        raise ProtocolError.new(err.message)
-      end
-    end
-  end
-end
-
-Redis::Connection.drivers << Redis::Connection::Hiredis
diff --git a/lib/vendor/redis/lib/redis/connection/registry.rb b/lib/vendor/redis/lib/redis/connection/registry.rb
deleted file mode 100644
index 69ca63d..0000000
--- a/lib/vendor/redis/lib/redis/connection/registry.rb
+++ /dev/null
@@ -1,12 +0,0 @@
-class Redis
-  module Connection
-
-    # Store a list of loaded connection drivers in the Connection module.
-    # Redis::Client uses the last required driver by default, and will be aware
-    # of the loaded connection drivers if the user chooses to override the
-    # default connection driver.
-    def self.drivers
-      @drivers ||= []
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/connection/ruby.rb b/lib/vendor/redis/lib/redis/connection/ruby.rb
deleted file mode 100644
index 96f1d6a..0000000
--- a/lib/vendor/redis/lib/redis/connection/ruby.rb
+++ /dev/null
@@ -1,429 +0,0 @@
-require "redis/connection/registry"
-require "redis/connection/command_helper"
-require "redis/errors"
-require "socket"
-require "timeout"
-
-begin
-  require "openssl"
-rescue LoadError
-  # Not all systems have OpenSSL support
-end
-
-if RUBY_VERSION < "1.9.3"
-  class String
-    # Ruby 1.8.7 does not have byteslice, but it handles encodings differently anyway.
-    # We can simply slice the string, which is a byte array there.
-    def byteslice(*args)
-      slice(*args)
-    end
-  end
-end
-
-class Redis
-  module Connection
-    module SocketMixin
-
-      CRLF = "\r\n".freeze
-
-      # Exceptions raised during non-blocking I/O ops that require retrying the op
-      if RUBY_VERSION >= "1.9.3"
-        NBIO_READ_EXCEPTIONS = [IO::WaitReadable]
-        NBIO_WRITE_EXCEPTIONS = [IO::WaitWritable]
-      else
-        NBIO_READ_EXCEPTIONS = [Errno::EWOULDBLOCK, Errno::EAGAIN]
-        NBIO_WRITE_EXCEPTIONS = [Errno::EWOULDBLOCK, Errno::EAGAIN]
-      end
-
-      def initialize(*args)
-        super(*args)
-
-        @timeout = @write_timeout = nil
-        @buffer = ""
-      end
-
-      def timeout=(timeout)
-        if timeout && timeout > 0
-          @timeout = timeout
-        else
-          @timeout = nil
-        end
-      end
-
-      def write_timeout=(timeout)
-        if timeout && timeout > 0
-          @write_timeout = timeout
-        else
-          @write_timeout = nil
-        end
-      end
-
-      def read(nbytes)
-        result = @buffer.slice!(0, nbytes)
-
-        while result.bytesize < nbytes
-          result << _read_from_socket(nbytes - result.bytesize)
-        end
-
-        result
-      end
-
-      def gets
-        crlf = nil
-
-        while (crlf = @buffer.index(CRLF)) == nil
-          @buffer << _read_from_socket(1024)
-        end
-
-        @buffer.slice!(0, crlf + CRLF.bytesize)
-      end
-
-      def _read_from_socket(nbytes)
-
-        begin
-          read_nonblock(nbytes)
-
-        rescue *NBIO_READ_EXCEPTIONS
-          if IO.select([self], nil, nil, @timeout)
-            retry
-          else
-            raise Redis::TimeoutError
-          end
-        rescue *NBIO_WRITE_EXCEPTIONS
-          if IO.select(nil, [self], nil, @timeout)
-            retry
-          else
-            raise Redis::TimeoutError
-          end
-        end
-
-      rescue EOFError
-        raise Errno::ECONNRESET
-      end
-
-      def _write_to_socket(data)
-        begin
-          write_nonblock(data)
-
-        rescue *NBIO_WRITE_EXCEPTIONS
-          if IO.select(nil, [self], nil, @write_timeout)
-            retry
-          else
-            raise Redis::TimeoutError
-          end
-        rescue *NBIO_READ_EXCEPTIONS
-          if IO.select([self], nil, nil, @write_timeout)
-            retry
-          else
-            raise Redis::TimeoutError
-          end
-        end
-
-      rescue EOFError
-        raise Errno::ECONNRESET
-      end
-
-      def write(data)
-        return super(data) unless @write_timeout
-
-        length = data.bytesize
-        total_count = 0
-        loop do
-          count = _write_to_socket(data)
-
-          total_count += count
-          return total_count if total_count >= length
-          data = data.byteslice(count..-1)
-        end
-      end
-    end
-
-    if defined?(RUBY_ENGINE) && RUBY_ENGINE == "jruby"
-
-      require "timeout"
-
-      class TCPSocket < ::TCPSocket
-
-        include SocketMixin
-
-        def self.connect(host, port, timeout)
-          Timeout.timeout(timeout) do
-            sock = new(host, port)
-            sock
-          end
-        rescue Timeout::Error
-          raise TimeoutError
-        end
-      end
-
-      if defined?(::UNIXSocket)
-
-        class UNIXSocket < ::UNIXSocket
-
-          include SocketMixin
-
-          def self.connect(path, timeout)
-            Timeout.timeout(timeout) do
-              sock = new(path)
-              sock
-            end
-          rescue Timeout::Error
-            raise TimeoutError
-          end
-
-          # JRuby raises Errno::EAGAIN on #read_nonblock even when IO.select
-          # says it is readable (1.6.6, in both 1.8 and 1.9 mode).
-          # Use the blocking #readpartial method instead.
-
-          def _read_from_socket(nbytes)
-            readpartial(nbytes)
-
-          rescue EOFError
-            raise Errno::ECONNRESET
-          end
-        end
-
-      end
-
-    else
-
-      class TCPSocket < ::Socket
-
-        include SocketMixin
-
-        def self.connect_addrinfo(ai, port, timeout)
-          sock = new(::Socket.const_get(ai[0]), Socket::SOCK_STREAM, 0)
-          sockaddr = ::Socket.pack_sockaddr_in(port, ai[3])
-
-          begin
-            sock.connect_nonblock(sockaddr)
-          rescue Errno::EINPROGRESS
-            if IO.select(nil, [sock], nil, timeout) == nil
-              raise TimeoutError
-            end
-
-            begin
-              sock.connect_nonblock(sockaddr)
-            rescue Errno::EISCONN
-            end
-          end
-
-          sock
-        end
-
-        def self.connect(host, port, timeout)
-          # Don't pass AI_ADDRCONFIG as flag to getaddrinfo(3)
-          #
-          # From the man page for getaddrinfo(3):
-          #
-          #   If hints.ai_flags includes the AI_ADDRCONFIG flag, then IPv4
-          #   addresses are returned in the list pointed to by res only if the
-          #   local system has at least one IPv4 address configured, and IPv6
-          #   addresses are returned only if the local system has at least one
-          #   IPv6 address configured. The loopback address is not considered
-          #   for this case as valid as a configured address.
-          #
-          # We do want the IPv6 loopback address to be returned if applicable,
-          # even if it is the only configured IPv6 address on the machine.
-          # Also see: https://github.com/redis/redis-rb/pull/394.
-          addrinfo = ::Socket.getaddrinfo(host, nil, Socket::AF_UNSPEC, Socket::SOCK_STREAM)
-
-          # From the man page for getaddrinfo(3):
-          #
-          #   Normally, the application should try using the addresses in the
-          #   order in which they are returned. The sorting function used
-          #   within getaddrinfo() is defined in RFC 3484 [...].
-          #
-          addrinfo.each_with_index do |ai, i|
-            begin
-              return connect_addrinfo(ai, port, timeout)
-            rescue SystemCallError
-              # Raise if this was our last attempt.
-              raise if addrinfo.length == i+1
-            end
-          end
-        end
-      end
-
-      class UNIXSocket < ::Socket
-
-        include SocketMixin
-
-        def self.connect(path, timeout)
-          sock = new(::Socket::AF_UNIX, Socket::SOCK_STREAM, 0)
-          sockaddr = ::Socket.pack_sockaddr_un(path)
-
-          begin
-            sock.connect_nonblock(sockaddr)
-          rescue Errno::EINPROGRESS
-            if IO.select(nil, [sock], nil, timeout) == nil
-              raise TimeoutError
-            end
-
-            begin
-              sock.connect_nonblock(sockaddr)
-            rescue Errno::EISCONN
-            end
-          end
-
-          sock
-        end
-      end
-
-    end
-
-    if defined?(OpenSSL)
-      class SSLSocket < ::OpenSSL::SSL::SSLSocket
-        include SocketMixin
-
-        def self.connect(host, port, timeout, ssl_params)
-          # Note: this is using Redis::Connection::TCPSocket
-          tcp_sock = TCPSocket.connect(host, port, timeout)
-
-          ctx = OpenSSL::SSL::SSLContext.new
-          ctx.set_params(ssl_params) if ssl_params && !ssl_params.empty?
-
-          ssl_sock = new(tcp_sock, ctx)
-          ssl_sock.hostname = host
-          ssl_sock.connect
-          ssl_sock.post_connection_check(host)
-
-          ssl_sock
-        end
-      end
-    end
-
-    class Ruby
-      include Redis::Connection::CommandHelper
-
-      MINUS    = "-".freeze
-      PLUS     = "+".freeze
-      COLON    = ":".freeze
-      DOLLAR   = "$".freeze
-      ASTERISK = "*".freeze
-
-      def self.connect(config)
-        if config[:scheme] == "unix"
-          raise ArgumentError, "SSL incompatible with unix sockets" if config[:ssl]
-          sock = UNIXSocket.connect(config[:path], config[:connect_timeout])
-        elsif config[:scheme] == "rediss" || config[:ssl]
-          raise ArgumentError, "This library does not support SSL on Ruby < 1.9" if RUBY_VERSION < "1.9.3"
-          sock = SSLSocket.connect(config[:host], config[:port], config[:connect_timeout], config[:ssl_params])
-        else
-          sock = TCPSocket.connect(config[:host], config[:port], config[:connect_timeout])
-        end
-
-        instance = new(sock)
-        instance.timeout = config[:timeout]
-        instance.write_timeout = config[:write_timeout]
-        instance.set_tcp_keepalive config[:tcp_keepalive]
-        instance
-      end
-
-      if [:SOL_SOCKET, :SO_KEEPALIVE, :SOL_TCP, :TCP_KEEPIDLE, :TCP_KEEPINTVL, :TCP_KEEPCNT].all?{|c| Socket.const_defined? c}
-        def set_tcp_keepalive(keepalive)
-          return unless keepalive.is_a?(Hash)
-
-          @sock.setsockopt(Socket::SOL_SOCKET, Socket::SO_KEEPALIVE,  true)
-          @sock.setsockopt(Socket::SOL_TCP,    Socket::TCP_KEEPIDLE,  keepalive[:time])
-          @sock.setsockopt(Socket::SOL_TCP,    Socket::TCP_KEEPINTVL, keepalive[:intvl])
-          @sock.setsockopt(Socket::SOL_TCP,    Socket::TCP_KEEPCNT,   keepalive[:probes])
-        end
-
-        def get_tcp_keepalive
-          {
-            :time   => @sock.getsockopt(Socket::SOL_TCP, Socket::TCP_KEEPIDLE).int,
-            :intvl  => @sock.getsockopt(Socket::SOL_TCP, Socket::TCP_KEEPINTVL).int,
-            :probes => @sock.getsockopt(Socket::SOL_TCP, Socket::TCP_KEEPCNT).int,
-          }
-        end
-      else
-        def set_tcp_keepalive(keepalive)
-        end
-
-        def get_tcp_keepalive
-          {
-          }
-        end
-      end
-
-      def initialize(sock)
-        @sock = sock
-      end
-
-      def connected?
-        !! @sock
-      end
-
-      def disconnect
-        @sock.close
-      rescue
-      ensure
-        @sock = nil
-      end
-
-      def timeout=(timeout)
-        if @sock.respond_to?(:timeout=)
-          @sock.timeout = timeout
-        end
-      end
-
-      def write_timeout=(timeout)
-        @sock.write_timeout = timeout
-      end
-
-      def write(command)
-        @sock.write(build_command(command))
-      end
-
-      def read
-        line = @sock.gets
-        reply_type = line.slice!(0, 1)
-        format_reply(reply_type, line)
-
-      rescue Errno::EAGAIN
-        raise TimeoutError
-      end
-
-      def format_reply(reply_type, line)
-        case reply_type
-        when MINUS    then format_error_reply(line)
-        when PLUS     then format_status_reply(line)
-        when COLON    then format_integer_reply(line)
-        when DOLLAR   then format_bulk_reply(line)
-        when ASTERISK then format_multi_bulk_reply(line)
-        else raise ProtocolError.new(reply_type)
-        end
-      end
-
-      def format_error_reply(line)
-        CommandError.new(line.strip)
-      end
-
-      def format_status_reply(line)
-        line.strip
-      end
-
-      def format_integer_reply(line)
-        line.to_i
-      end
-
-      def format_bulk_reply(line)
-        bulklen = line.to_i
-        return if bulklen == -1
-        reply = encode(@sock.read(bulklen))
-        @sock.read(2) # Discard CRLF.
-        reply
-      end
-
-      def format_multi_bulk_reply(line)
-        n = line.to_i
-        return if n == -1
-
-        Array.new(n) { read }
-      end
-    end
-  end
-end
-
-Redis::Connection.drivers << Redis::Connection::Ruby
diff --git a/lib/vendor/redis/lib/redis/connection/synchrony.rb b/lib/vendor/redis/lib/redis/connection/synchrony.rb
deleted file mode 100644
index 9f0b67c..0000000
--- a/lib/vendor/redis/lib/redis/connection/synchrony.rb
+++ /dev/null
@@ -1,133 +0,0 @@
-require "redis/connection/command_helper"
-require "redis/connection/registry"
-require "redis/errors"
-require "em-synchrony"
-require "hiredis/reader"
-
-class Redis
-  module Connection
-    class RedisClient < EventMachine::Connection
-      include EventMachine::Deferrable
-
-      attr_accessor :timeout
-
-      def post_init
-        @req = nil
-        @connected = false
-        @reader = ::Hiredis::Reader.new
-      end
-
-      def connection_completed
-        @connected = true
-        succeed
-      end
-
-      def connected?
-        @connected
-      end
-
-      def receive_data(data)
-        @reader.feed(data)
-
-        loop do
-          begin
-            reply = @reader.gets
-          rescue RuntimeError => err
-            @req.fail [:error, ProtocolError.new(err.message)]
-            break
-          end
-
-          break if reply == false
-
-          reply = CommandError.new(reply.message) if reply.is_a?(RuntimeError)
-          @req.succeed [:reply, reply]
-        end
-      end
-
-      def read
-        @req = EventMachine::DefaultDeferrable.new
-        if @timeout > 0
-          @req.timeout(@timeout, :timeout)
-        end
-        EventMachine::Synchrony.sync @req
-      end
-
-      def send(data)
-        callback { send_data data }
-      end
-
-      def unbind
-        @connected = false
-        if @req
-          @req.fail [:error, Errno::ECONNRESET]
-          @req = nil
-        else
-          fail
-        end
-      end
-    end
-
-    class Synchrony
-      include Redis::Connection::CommandHelper
-
-      def self.connect(config)
-        if config[:scheme] == "unix"
-          conn = EventMachine.connect_unix_domain(config[:path], RedisClient)
-        elsif config[:scheme] == "rediss" || config[:ssl]
-          raise NotImplementedError, "SSL not supported by synchrony driver"
-        else
-          conn = EventMachine.connect(config[:host], config[:port], RedisClient) do |c|
-            c.pending_connect_timeout = [config[:connect_timeout], 0.1].max
-          end
-        end
-
-        fiber = Fiber.current
-        conn.callback { fiber.resume }
-        conn.errback { fiber.resume :refused }
-
-        raise Errno::ECONNREFUSED if Fiber.yield == :refused
-
-        instance = new(conn)
-        instance.timeout = config[:read_timeout]
-        instance
-      end
-
-      def initialize(connection)
-        @connection = connection
-      end
-
-      def connected?
-        @connection && @connection.connected?
-      end
-
-      def timeout=(timeout)
-        @connection.timeout = timeout
-      end
-
-      def disconnect
-        @connection.close_connection
-        @connection = nil
-      end
-
-      def write(command)
-        @connection.send(build_command(command))
-      end
-
-      def read
-        type, payload = @connection.read
-
-        if type == :reply
-          payload
-        elsif type == :error
-          raise payload
-        elsif type == :timeout
-          raise TimeoutError
-        else
-          raise "Unknown type #{type.inspect}"
-        end
-      end
-    end
-  end
-end
-
-Redis::Connection.drivers << Redis::Connection::Synchrony
diff --git a/lib/vendor/redis/lib/redis/distributed.rb b/lib/vendor/redis/lib/redis/distributed.rb
deleted file mode 100644
index df49148..0000000
--- a/lib/vendor/redis/lib/redis/distributed.rb
+++ /dev/null
@@ -1,873 +0,0 @@
-require "redis/hash_ring"
-
-class Redis
-  class Distributed
-
-    class CannotDistribute < RuntimeError
-      def initialize(command)
-        @command = command
-      end
-
-      def message
-        "#{@command.to_s.upcase} cannot be used in Redis::Distributed because the keys involved need to be on the same server or because we cannot guarantee that the operation will be atomic."
-      end
-    end
-
-    attr_reader :ring
-
-    def initialize(node_configs, options = {})
-      @tag = options[:tag] || /^\{(.+?)\}/
-      @ring = options[:ring] || HashRing.new
-      @node_configs = node_configs.dup
-      @default_options = options.dup
-      node_configs.each { |node_config| add_node(node_config) }
-      @subscribed_node = nil
-    end
-
-    def node_for(key)
-      @ring.get_node(key_tag(key.to_s) || key.to_s)
-    end
-
-    def nodes
-      @ring.nodes
-    end
-
-    def add_node(options)
-      options = { :url => options } if options.is_a?(String)
-      options = @default_options.merge(options)
-      @ring.add_node Redis.new( options )
-    end
-
-    # Change the selected database for the current connection.
-    def select(db)
-      on_each_node :select, db
-    end
-
-    # Ping the server.
-    def ping
-      on_each_node :ping
-    end
-
-    # Echo the given string.
-    def echo(value)
-      on_each_node :echo, value
-    end
-
-    # Close the connection.
-    def quit
-      on_each_node :quit
-    end
-
-    # Asynchronously save the dataset to disk.
-    def bgsave
-      on_each_node :bgsave
-    end
-
-    # Return the number of keys in the selected database.
-    def dbsize
-      on_each_node :dbsize
-    end
-
-    # Remove all keys from all databases.
-    def flushall
-      on_each_node :flushall
-    end
-
-    # Remove all keys from the current database.
-    def flushdb
-      on_each_node :flushdb
-    end
-
-    # Get information and statistics about the server.
-    def info(cmd = nil)
-      on_each_node :info, cmd
-    end
-
-    # Get the UNIX time stamp of the last successful save to disk.
-    def lastsave
-      on_each_node :lastsave
-    end
-
-    # Listen for all requests received by the server in real time.
-    def monitor
-      raise NotImplementedError
-    end
-
-    # Synchronously save the dataset to disk.
-    def save
-      on_each_node :save
-    end
-
-    # Get server time: an UNIX timestamp and the elapsed microseconds in the current second.
-    def time
-      on_each_node :time
-    end
-
-    # Remove the expiration from a key.
-    def persist(key)
-      node_for(key).persist(key)
-    end
-
-    # Set a key's time to live in seconds.
-    def expire(key, seconds)
-      node_for(key).expire(key, seconds)
-    end
-
-    # Set the expiration for a key as a UNIX timestamp.
-    def expireat(key, unix_time)
-      node_for(key).expireat(key, unix_time)
-    end
-
-    # Get the time to live (in seconds) for a key.
-    def ttl(key)
-      node_for(key).ttl(key)
-    end
-
-    # Set a key's time to live in milliseconds.
-    def pexpire(key, milliseconds)
-      node_for(key).pexpire(key, milliseconds)
-    end
-
-    # Set the expiration for a key as number of milliseconds from UNIX Epoch.
-    def pexpireat(key, ms_unix_time)
-      node_for(key).pexpireat(key, ms_unix_time)
-    end
-
-    # Get the time to live (in milliseconds) for a key.
-    def pttl(key)
-      node_for(key).pttl(key)
-    end
-
-    # Return a serialized version of the value stored at a key.
-    def dump(key)
-      node_for(key).dump(key)
-    end
-
-    # Create a key using the serialized value, previously obtained using DUMP.
-    def restore(key, ttl, serialized_value)
-      node_for(key).restore(key, ttl, serialized_value)
-    end
-
-    # Transfer a key from the connected instance to another instance.
-    def migrate(key, options)
-      raise CannotDistribute, :migrate
-    end
-
-    # Delete a key.
-    def del(*args)
-      keys_per_node = args.group_by { |key| node_for(key) }
-      keys_per_node.inject(0) do |sum, (node, keys)|
-        sum + node.del(*keys)
-      end
-    end
-
-    # Determine if a key exists.
-    def exists(key)
-      node_for(key).exists(key)
-    end
-
-    # Find all keys matching the given pattern.
-    def keys(glob = "*")
-      on_each_node(:keys, glob).flatten
-    end
-
-    # Move a key to another database.
-    def move(key, db)
-      node_for(key).move(key, db)
-    end
-
-    # Return a random key from the keyspace.
-    def randomkey
-      raise CannotDistribute, :randomkey
-    end
-
-    # Rename a key.
-    def rename(old_name, new_name)
-      ensure_same_node(:rename, [old_name, new_name]) do |node|
-        node.rename(old_name, new_name)
-      end
-    end
-
-    # Rename a key, only if the new key does not exist.
-    def renamenx(old_name, new_name)
-      ensure_same_node(:renamenx, [old_name, new_name]) do |node|
-        node.renamenx(old_name, new_name)
-      end
-    end
-
-    # Sort the elements in a list, set or sorted set.
-    def sort(key, options = {})
-      keys = [key, options[:by], options[:store], *Array(options[:get])].compact
-
-      ensure_same_node(:sort, keys) do |node|
-        node.sort(key, options)
-      end
-    end
-
-    # Determine the type stored at key.
-    def type(key)
-      node_for(key).type(key)
-    end
-
-    # Decrement the integer value of a key by one.
-    def decr(key)
-      node_for(key).decr(key)
-    end
-
-    # Decrement the integer value of a key by the given number.
-    def decrby(key, decrement)
-      node_for(key).decrby(key, decrement)
-    end
-
-    # Increment the integer value of a key by one.
-    def incr(key)
-      node_for(key).incr(key)
-    end
-
-    # Increment the integer value of a key by the given integer number.
-    def incrby(key, increment)
-      node_for(key).incrby(key, increment)
-    end
-
-    # Increment the numeric value of a key by the given float number.
-    def incrbyfloat(key, increment)
-      node_for(key).incrbyfloat(key, increment)
-    end
-
-    # Set the string value of a key.
-    def set(key, value, options = {})
-      node_for(key).set(key, value, options)
-    end
-
-    # Set the time to live in seconds of a key.
-    def setex(key, ttl, value)
-      node_for(key).setex(key, ttl, value)
-    end
-
-    # Set the time to live in milliseconds of a key.
-    def psetex(key, ttl, value)
-      node_for(key).psetex(key, ttl, value)
-    end
-
-    # Set the value of a key, only if the key does not exist.
-    def setnx(key, value)
-      node_for(key).setnx(key, value)
-    end
-
-    # Set multiple keys to multiple values.
-    def mset(*args)
-      raise CannotDistribute, :mset
-    end
-
-    def mapped_mset(hash)
-      raise CannotDistribute, :mapped_mset
-    end
-
-    # Set multiple keys to multiple values, only if none of the keys exist.
-    def msetnx(*args)
-      raise CannotDistribute, :msetnx
-    end
-
-    def mapped_msetnx(hash)
-      raise CannotDistribute, :mapped_msetnx
-    end
-
-    # Get the value of a key.
-    def get(key)
-      node_for(key).get(key)
-    end
-
-    # Get the values of all the given keys.
-    def mget(*keys)
-      raise CannotDistribute, :mget
-    end
-
-    def mapped_mget(*keys)
-      raise CannotDistribute, :mapped_mget
-    end
-
-    # Overwrite part of a string at key starting at the specified offset.
-    def setrange(key, offset, value)
-      node_for(key).setrange(key, offset, value)
-    end
-
-    # Get a substring of the string stored at a key.
-    def getrange(key, start, stop)
-      node_for(key).getrange(key, start, stop)
-    end
-
-    # Sets or clears the bit at offset in the string value stored at key.
-    def setbit(key, offset, value)
-      node_for(key).setbit(key, offset, value)
-    end
-
-    # Returns the bit value at offset in the string value stored at key.
-    def getbit(key, offset)
-      node_for(key).getbit(key, offset)
-    end
-
-    # Append a value to a key.
-    def append(key, value)
-      node_for(key).append(key, value)
-    end
-
-    # Count the number of set bits in a range of the string value stored at key.
-    def bitcount(key, start = 0, stop = -1)
-      node_for(key).bitcount(key, start, stop)
-    end
-
-    # Perform a bitwise operation between strings and store the resulting string in a key.
-    def bitop(operation, destkey, *keys)
-      ensure_same_node(:bitop, [destkey] + keys) do |node|
-        node.bitop(operation, destkey, *keys)
-      end
-    end
-
-    # Return the position of the first bit set to 1 or 0 in a string.
-    def bitpos(key, bit, start=nil, stop=nil)
-      node_for(key).bitpos(key, bit, start, stop)
-    end
-
-    # Set the string value of a key and return its old value.
-    def getset(key, value)
-      node_for(key).getset(key, value)
-    end
-
-    # Get the length of the value stored in a key.
-    def strlen(key)
-      node_for(key).strlen(key)
-    end
-
-    def [](key)
-      get(key)
-    end
-
-    def []=(key,value)
-      set(key, value)
-    end
-
-    # Get the length of a list.
-    def llen(key)
-      node_for(key).llen(key)
-    end
-
-    # Prepend one or more values to a list.
-    def lpush(key, value)
-      node_for(key).lpush(key, value)
-    end
-
-    # Prepend a value to a list, only if the list exists.
-    def lpushx(key, value)
-      node_for(key).lpushx(key, value)
-    end
-
-    # Append one or more values to a list.
-    def rpush(key, value)
-      node_for(key).rpush(key, value)
-    end
-
-    # Append a value to a list, only if the list exists.
-    def rpushx(key, value)
-      node_for(key).rpushx(key, value)
-    end
-
-    # Remove and get the first element in a list.
-    def lpop(key)
-      node_for(key).lpop(key)
-    end
-
-    # Remove and get the last element in a list.
-    def rpop(key)
-      node_for(key).rpop(key)
-    end
-
-    # Remove the last element in a list, append it to another list and return
-    # it.
-    def rpoplpush(source, destination)
-      ensure_same_node(:rpoplpush, [source, destination]) do |node|
-        node.rpoplpush(source, destination)
-      end
-    end
-
-    def _bpop(cmd, args)
-      options = {}
-
-      case args.last
-      when Hash
-        options = args.pop
-      when Integer
-        # Issue deprecation notice in obnoxious mode...
-        options[:timeout] = args.pop
-      end
-
-      if args.size > 1
-        # Issue deprecation notice in obnoxious mode...
-      end
-
-      keys = args.flatten
-
-      ensure_same_node(cmd, keys) do |node|
-        node.__send__(cmd, keys, options)
-      end
-    end
-
-    # Remove and get the first element in a list, or block until one is
-    # available.
-    def blpop(*args)
-      _bpop(:blpop, args)
-    end
-
-    # Remove and get the last element in a list, or block until one is
-    # available.
-    def brpop(*args)
-      _bpop(:brpop, args)
-    end
-
-    # Pop a value from a list, push it to another list and return it; or block
-    # until one is available.
-    def brpoplpush(source, destination, options = {})
-      case options
-      when Integer
-        # Issue deprecation notice in obnoxious mode...
-        options = { :timeout => options }
-      end
-
-      ensure_same_node(:brpoplpush, [source, destination]) do |node|
-        node.brpoplpush(source, destination, options)
-      end
-    end
-
-    # Get an element from a list by its index.
-    def lindex(key, index)
-      node_for(key).lindex(key, index)
-    end
-
-    # Insert an element before or after another element in a list.
-    def linsert(key, where, pivot, value)
-      node_for(key).linsert(key, where, pivot, value)
-    end
-
-    # Get a range of elements from a list.
-    def lrange(key, start, stop)
-      node_for(key).lrange(key, start, stop)
-    end
-
-    # Remove elements from a list.
-    def lrem(key, count, value)
-      node_for(key).lrem(key, count, value)
-    end
-
-    # Set the value of an element in a list by its index.
-    def lset(key, index, value)
-      node_for(key).lset(key, index, value)
-    end
-
-    # Trim a list to the specified range.
-    def ltrim(key, start, stop)
-      node_for(key).ltrim(key, start, stop)
-    end
-
-    # Get the number of members in a set.
-    def scard(key)
-      node_for(key).scard(key)
-    end
-
-    # Add one or more members to a set.
-    def sadd(key, member)
-      node_for(key).sadd(key, member)
-    end
-
-    # Remove one or more members from a set.
-    def srem(key, member)
-      node_for(key).srem(key, member)
-    end
-
-    # Remove and return a random member from a set.
-    def spop(key, count = nil)
-      node_for(key).spop(key, count)
-    end
-
-    # Get a random member from a set.
-    def srandmember(key, count = nil)
-      node_for(key).srandmember(key, count)
-    end
-
-    # Move a member from one set to another.
-    def smove(source, destination, member)
-      ensure_same_node(:smove, [source, destination]) do |node|
-        node.smove(source, destination, member)
-      end
-    end
-
-    # Determine if a given value is a member of a set.
-    def sismember(key, member)
-      node_for(key).sismember(key, member)
-    end
-
-    # Get all the members in a set.
-    def smembers(key)
-      node_for(key).smembers(key)
-    end
-
-    # Subtract multiple sets.
-    def sdiff(*keys)
-      ensure_same_node(:sdiff, keys) do |node|
-        node.sdiff(*keys)
-      end
-    end
-
-    # Subtract multiple sets and store the resulting set in a key.
-    def sdiffstore(destination, *keys)
-      ensure_same_node(:sdiffstore, [destination] + keys) do |node|
-        node.sdiffstore(destination, *keys)
-      end
-    end
-
-    # Intersect multiple sets.
-    def sinter(*keys)
-      ensure_same_node(:sinter, keys) do |node|
-        node.sinter(*keys)
-      end
-    end
-
-    # Intersect multiple sets and store the resulting set in a key.
-    def sinterstore(destination, *keys)
-      ensure_same_node(:sinterstore, [destination] + keys) do |node|
-        node.sinterstore(destination, *keys)
-      end
-    end
-
-    # Add multiple sets.
-    def sunion(*keys)
-      ensure_same_node(:sunion, keys) do |node|
-        node.sunion(*keys)
-      end
-    end
-
-    # Add multiple sets and store the resulting set in a key.
-    def sunionstore(destination, *keys)
-      ensure_same_node(:sunionstore, [destination] + keys) do |node|
-        node.sunionstore(destination, *keys)
-      end
-    end
-
-    # Get the number of members in a sorted set.
-    def zcard(key)
-      node_for(key).zcard(key)
-    end
-
-    # Add one or more members to a sorted set, or update the score for members
-    # that already exist.
-    def zadd(key, *args)
-      node_for(key).zadd(key, *args)
-    end
-
-    # Increment the score of a member in a sorted set.
-    def zincrby(key, increment, member)
-      node_for(key).zincrby(key, increment, member)
-    end
-
-    # Remove one or more members from a sorted set.
-    def zrem(key, member)
-      node_for(key).zrem(key, member)
-    end
-
-    # Get the score associated with the given member in a sorted set.
-    def zscore(key, member)
-      node_for(key).zscore(key, member)
-    end
-
-    # Return a range of members in a sorted set, by index.
-    def zrange(key, start, stop, options = {})
-      node_for(key).zrange(key, start, stop, options)
-    end
-
-    # Return a range of members in a sorted set, by index, with scores ordered
-    # from high to low.
-    def zrevrange(key, start, stop, options = {})
-      node_for(key).zrevrange(key, start, stop, options)
-    end
-
-    # Determine the index of a member in a sorted set.
-    def zrank(key, member)
-      node_for(key).zrank(key, member)
-    end
-
-    # Determine the index of a member in a sorted set, with scores ordered from
-    # high to low.
-    def zrevrank(key, member)
-      node_for(key).zrevrank(key, member)
-    end
-
-    # Remove all members in a sorted set within the given indexes.
-    def zremrangebyrank(key, start, stop)
-      node_for(key).zremrangebyrank(key, start, stop)
-    end
-
-    # Return a range of members in a sorted set, by score.
-    def zrangebyscore(key, min, max, options = {})
-      node_for(key).zrangebyscore(key, min, max, options)
-    end
-
-    # Return a range of members in a sorted set, by score, with scores ordered
-    # from high to low.
-    def zrevrangebyscore(key, max, min, options = {})
-      node_for(key).zrevrangebyscore(key, max, min, options)
-    end
-
-    # Remove all members in a sorted set within the given scores.
-    def zremrangebyscore(key, min, max)
-      node_for(key).zremrangebyscore(key, min, max)
-    end
-
-    # Get the number of members in a particular score range.
-    def zcount(key, min, max)
-      node_for(key).zcount(key, min, max)
-    end
-
-    # Intersect multiple sorted sets and store the resulting sorted set in a new
-    # key.
-    def zinterstore(destination, keys, options = {})
-      ensure_same_node(:zinterstore, [destination] + keys) do |node|
-        node.zinterstore(destination, keys, options)
-      end
-    end
-
-    # Add multiple sorted sets and store the resulting sorted set in a new key.
-    def zunionstore(destination, keys, options = {})
-      ensure_same_node(:zunionstore, [destination] + keys) do |node|
-        node.zunionstore(destination, keys, options)
-      end
-    end
-
-    # Get the number of fields in a hash.
-    def hlen(key)
-      node_for(key).hlen(key)
-    end
-
-    # Set the string value of a hash field.
-    def hset(key, field, value)
-      node_for(key).hset(key, field, value)
-    end
-
-    # Set the value of a hash field, only if the field does not exist.
-    def hsetnx(key, field, value)
-      node_for(key).hsetnx(key, field, value)
-    end
-
-    # Set multiple hash fields to multiple values.
-    def hmset(key, *attrs)
-      node_for(key).hmset(key, *attrs)
-    end
-
-    def mapped_hmset(key, hash)
-      node_for(key).hmset(key, *hash.to_a.flatten)
-    end
-
-    # Get the value of a hash field.
-    def hget(key, field)
-      node_for(key).hget(key, field)
-    end
-
-    # Get the values of all the given hash fields.
-    def hmget(key, *fields)
-      node_for(key).hmget(key, *fields)
-    end
-
-    def mapped_hmget(key, *fields)
-      Hash[*fields.zip(hmget(key, *fields)).flatten]
-    end
-
-    # Delete one or more hash fields.
-    def hdel(key, field)
-      node_for(key).hdel(key, field)
-    end
-
-    # Determine if a hash field exists.
-    def hexists(key, field)
-      node_for(key).hexists(key, field)
-    end
-
-    # Increment the integer value of a hash field by the given integer number.
-    def hincrby(key, field, increment)
-      node_for(key).hincrby(key, field, increment)
-    end
-
-    # Increment the numeric value of a hash field by the given float number.
-    def hincrbyfloat(key, field, increment)
-      node_for(key).hincrbyfloat(key, field, increment)
-    end
-
-    # Get all the fields in a hash.
-    def hkeys(key)
-      node_for(key).hkeys(key)
-    end
-
-    # Get all the values in a hash.
-    def hvals(key)
-      node_for(key).hvals(key)
-    end
-
-    # Get all the fields and values in a hash.
-    def hgetall(key)
-      node_for(key).hgetall(key)
-    end
-
-    # Post a message to a channel.
-    def publish(channel, message)
-      node_for(channel).publish(channel, message)
-    end
-
-    def subscribed?
-      !! @subscribed_node
-    end
-
-    # Listen for messages published to the given channels.
-    def subscribe(channel, *channels, &block)
-      if channels.empty?
-        @subscribed_node = node_for(channel)
-        @subscribed_node.subscribe(channel, &block)
-      else
-        ensure_same_node(:subscribe, [channel] + channels) do |node|
-          @subscribed_node = node
-          node.subscribe(channel, *channels, &block)
-        end
-      end
-    end
-
-    # Stop listening for messages posted to the given channels.
-    def unsubscribe(*channels)
-      raise RuntimeError, "Can't unsubscribe if not subscribed." unless subscribed?
-      @subscribed_node.unsubscribe(*channels)
-    end
-
-    # Listen for messages published to channels matching the given patterns.
-    def psubscribe(*channels, &block)
-      raise NotImplementedError
-    end
-
-    # Stop listening for messages posted to channels matching the given
-    # patterns.
-    def punsubscribe(*channels)
-      raise NotImplementedError
-    end
-
-    # Watch the given keys to determine execution of the MULTI/EXEC block.
-    def watch(*keys)
-      raise CannotDistribute, :watch
-    end
-
-    # Forget about all watched keys.
-    def unwatch
-      raise CannotDistribute, :unwatch
-    end
-
-    def pipelined
-      raise CannotDistribute, :pipelined
-    end
-
-    # Mark the start of a transaction block.
-    def multi
-      raise CannotDistribute, :multi
-    end
-
-    # Execute all commands issued after MULTI.
-    def exec
-      raise CannotDistribute, :exec
-    end
-
-    # Discard all commands issued after MULTI.
-    def discard
-      raise CannotDistribute, :discard
-    end
-
-    # Control remote script registry.
-    def script(subcommand, *args)
-      on_each_node(:script, subcommand, *args)
-    end
-
-    # Add one or more members to a HyperLogLog structure.
-    def pfadd(key, member)
-      node_for(key).pfadd(key, member)
-    end
-
-    # Get the approximate cardinality of members added to HyperLogLog structure.
-    def pfcount(*keys)
-      ensure_same_node(:pfcount, keys.flatten(1)) do |node|
-        node.pfcount(keys)
-      end
-    end
-
-    # Merge multiple HyperLogLog values into an unique value that will approximate the cardinality of the union of
-    # the observed Sets of the source HyperLogLog structures.
-    def pfmerge(dest_key, *source_key)
-      ensure_same_node(:pfmerge, [dest_key, *source_key]) do |node|
-        node.pfmerge(dest_key, *source_key)
-      end
-    end
-
-    def _eval(cmd, args)
-      script = args.shift
-      options = args.pop if args.last.is_a?(Hash)
-      options ||= {}
-
-      keys = args.shift || options[:keys] || []
-      argv = args.shift || options[:argv] || []
-
-      ensure_same_node(cmd, keys) do |node|
-        node.send(cmd, script, keys, argv)
-      end
-    end
-
-    # Evaluate Lua script.
-    def eval(*args)
-      _eval(:eval, args)
-    end
-
-    # Evaluate Lua script by its SHA.
-    def evalsha(*args)
-      _eval(:evalsha, args)
-    end
-
-    def inspect
-      "#<Redis client v#{Redis::VERSION} for #{nodes.map(&:id).join(', ')}>"
-    end
-
-    def dup
-      self.class.new(@node_configs, @default_options)
-    end
-
-  protected
-
-    def on_each_node(command, *args)
-      nodes.map do |node|
-        node.send(command, *args)
-      end
-    end
-
-    def node_index_for(key)
-      nodes.index(node_for(key))
-    end
-
-    def key_tag(key)
-      key.to_s[@tag, 1] if @tag
-    end
-
-    def ensure_same_node(command, keys)
-      all = true
-
-      tags = keys.map do |key|
-        tag = key_tag(key)
-        all = false unless tag
-        tag
-      end
-
-      if (all && tags.uniq.size != 1) || (!all && keys.uniq.size != 1)
-        # Not 1 unique tag or not 1 unique key
-        raise CannotDistribute, command
-      end
-
-      yield(node_for(keys.first))
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/errors.rb b/lib/vendor/redis/lib/redis/errors.rb
deleted file mode 100644
index 85b222e..0000000
--- a/lib/vendor/redis/lib/redis/errors.rb
+++ /dev/null
@@ -1,40 +0,0 @@
-class Redis
-  # Base error for all redis-rb errors.
-  class BaseError < RuntimeError
-  end
-
-  # Raised by the connection when a protocol error occurs.
-  class ProtocolError < BaseError
-    def initialize(reply_type)
-      super(<<-EOS.gsub(/(?:^|\n)\s*/, " "))
-        Got '#{reply_type}' as initial reply byte.
-        If you're in a forking environment, such as Unicorn, you need to
-        connect to Redis after forking.
-      EOS
-    end
-  end
-
-  # Raised by the client when command execution returns an error reply.
-  class CommandError < BaseError
-  end
-
-  # Base error for connection related errors.
-  class BaseConnectionError < BaseError
-  end
-
-  # Raised when connection to a Redis server cannot be made.
-  class CannotConnectError < BaseConnectionError
-  end
-
-  # Raised when connection to a Redis server is lost.
-  class ConnectionError < BaseConnectionError
-  end
-
-  # Raised when performing I/O times out.
-  class TimeoutError < BaseConnectionError
-  end
-
-  # Raised when the connection was inherited by a child process.
-  class InheritedError < BaseConnectionError
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/hash_ring.rb b/lib/vendor/redis/lib/redis/hash_ring.rb
deleted file mode 100644
index 2a199bd..0000000
--- a/lib/vendor/redis/lib/redis/hash_ring.rb
+++ /dev/null
@@ -1,132 +0,0 @@
-require 'zlib'
-
-class Redis
-  class HashRing
-
-    POINTS_PER_SERVER = 160 # this is the default in libmemcached
-
-    attr_reader :ring, :sorted_keys, :replicas, :nodes
-
-    # nodes is a list of objects that have a proper to_s representation.
-    # replicas indicates how many virtual points should be used pr. node,
-    # replicas are required to improve the distribution.
-    def initialize(nodes=[], replicas=POINTS_PER_SERVER)
-      @replicas = replicas
-      @ring = {}
-      @nodes = []
-      @sorted_keys = []
-      nodes.each do |node|
-        add_node(node)
-      end
-    end
-
-    # Adds a `node` to the hash ring (including a number of replicas).
-    def add_node(node)
-      @nodes << node
-      @replicas.times do |i|
-        key = Zlib.crc32("#{node.id}:#{i}")
-        raise "Node ID collision" if @ring.has_key?(key)
-        @ring[key] = node
-        @sorted_keys << key
-      end
-      @sorted_keys.sort!
-    end
-
-    def remove_node(node)
-      @nodes.reject!{|n| n.id == node.id}
-      @replicas.times do |i|
-        key = Zlib.crc32("#{node.id}:#{i}")
-        @ring.delete(key)
-        @sorted_keys.reject! {|k| k == key}
-      end
-    end
-
-    # get the node in the hash ring for this key
-    def get_node(key)
-      get_node_pos(key)[0]
-    end
-
-    def get_node_pos(key)
-      return [nil,nil] if @ring.size == 0
-      crc = Zlib.crc32(key)
-      idx = HashRing.binary_search(@sorted_keys, crc)
-      return [@ring[@sorted_keys[idx]], idx]
-    end
-
-    def iter_nodes(key)
-      return [nil,nil] if @ring.size == 0
-      _, pos = get_node_pos(key)
-      @ring.size.times do |n|
-        yield @ring[@sorted_keys[(pos+n) % @ring.size]]
-      end
-    end
-
-    class << self
-
-      # gem install RubyInline to use this code
-      # Native extension to perform the binary search within the hashring.
-      # There's a pure ruby version below so this is purely optional
-      # for performance.  In testing 20k gets and sets, the native
-      # binary search shaved about 12% off the runtime (9sec -> 8sec).
-      begin
-        require 'inline'
-        inline do |builder|
-          builder.c <<-EOM
-          int binary_search(VALUE ary, unsigned int r) {
-              int upper = RARRAY_LEN(ary) - 1;
-              int lower = 0;
-              int idx = 0;
-
-              while (lower <= upper) {
-                  idx = (lower + upper) / 2;
-
-                  VALUE continuumValue = RARRAY_PTR(ary)[idx];
-                  unsigned int l = NUM2UINT(continuumValue);
-                  if (l == r) {
-                      return idx;
-                  }
-                  else if (l > r) {
-                      upper = idx - 1;
-                  }
-                  else {
-                      lower = idx + 1;
-                  }
-              }
-              if (upper < 0) {
-                upper = RARRAY_LEN(ary) - 1;
-              }
-              return upper;
-          }
-          EOM
-        end
-      rescue Exception
-        # Find the closest index in HashRing with value <= the given value
-        def binary_search(ary, value, &block)
-          upper = ary.size - 1
-          lower = 0
-          idx = 0
-
-          while(lower <= upper) do
-            idx = (lower + upper) / 2
-            comp = ary[idx] <=> value
-
-            if comp == 0
-              return idx
-            elsif comp > 0
-              upper = idx - 1
-            else
-              lower = idx + 1
-            end
-          end
-
-          if upper < 0
-            upper = ary.size - 1
-          end
-          return upper
-        end
-
-      end
-    end
-
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/pipeline.rb b/lib/vendor/redis/lib/redis/pipeline.rb
deleted file mode 100644
index a77f86d..0000000
--- a/lib/vendor/redis/lib/redis/pipeline.rb
+++ /dev/null
@@ -1,141 +0,0 @@
-class Redis
-  unless defined?(::BasicObject)
-    class BasicObject
-      instance_methods.each { |meth| undef_method(meth) unless meth =~ /\A(__|instance_eval)/ }
-    end
-  end
-
-  class Pipeline
-    attr_accessor :db
-
-    attr :futures
-
-    def initialize
-      @with_reconnect = true
-      @shutdown = false
-      @futures = []
-    end
-
-    def with_reconnect?
-      @with_reconnect
-    end
-
-    def without_reconnect?
-      !@with_reconnect
-    end
-
-    def shutdown?
-      @shutdown
-    end
-
-    def call(command, &block)
-      # A pipeline that contains a shutdown should not raise ECONNRESET when
-      # the connection is gone.
-      @shutdown = true if command.first == :shutdown
-      future = Future.new(command, block)
-      @futures << future
-      future
-    end
-
-    def call_pipeline(pipeline)
-      @shutdown = true if pipeline.shutdown?
-      @futures.concat(pipeline.futures)
-      @db = pipeline.db
-      nil
-    end
-
-    def commands
-      @futures.map { |f| f._command }
-    end
-
-    def with_reconnect(val=true)
-      @with_reconnect = false unless val
-      yield
-    end
-
-    def without_reconnect(&blk)
-      with_reconnect(false, &blk)
-    end
-
-    def finish(replies, &blk)
-      if blk
-        futures.each_with_index.map do |future, i|
-          future._set(blk.call(replies[i]))
-        end
-      else
-        futures.each_with_index.map do |future, i|
-          future._set(replies[i])
-        end
-      end
-    end
-
-    class Multi < self
-      def finish(replies)
-        exec = replies.last
-
-        return if exec.nil? # The transaction failed because of WATCH.
-
-        # EXEC command failed.
-        raise exec if exec.is_a?(CommandError)
-
-        if exec.size < futures.size
-          # Some command wasn't recognized by Redis.
-          raise replies.detect { |r| r.is_a?(CommandError) }
-        end
-
-        super(exec) do |reply|
-          # Because an EXEC returns nested replies, hiredis won't be able to
-          # convert an error reply to a CommandError instance itself. This is
-          # specific to MULTI/EXEC, so we solve this here.
-          reply.is_a?(::RuntimeError) ? CommandError.new(reply.message) : reply
-        end
-      end
-
-      def commands
-        [[:multi]] + super + [[:exec]]
-      end
-    end
-  end
-
-  class FutureNotReady < RuntimeError
-    def initialize
-      super("Value will be available once the pipeline executes.")
-    end
-  end
-
-  class Future < BasicObject
-    FutureNotReady = ::Redis::FutureNotReady.new
-
-    def initialize(command, transformation)
-      @command = command
-      @transformation = transformation
-      @object = FutureNotReady
-    end
-
-    def inspect
-      "<Redis::Future #{@command.inspect}>"
-    end
-
-    def _set(object)
-      @object = @transformation ? @transformation.call(object) : object
-      value
-    end
-
-    def _command
-      @command
-    end
-
-    def value
-      ::Kernel.raise(@object) if @object.kind_of?(::RuntimeError)
-      @object
-    end
-
-    def is_a?(other)
-      self.class.ancestors.include?(other)
-    end
-
-    def class
-      Future
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/subscribe.rb b/lib/vendor/redis/lib/redis/subscribe.rb
deleted file mode 100644
index 3029d04..0000000
--- a/lib/vendor/redis/lib/redis/subscribe.rb
+++ /dev/null
@@ -1,91 +0,0 @@
-class Redis
-  class SubscribedClient
-    def initialize(client)
-      @client = client
-    end
-
-    def call(command)
-      @client.process([command])
-    end
-
-    def subscribe(*channels, &block)
-      subscription("subscribe", "unsubscribe", channels, block)
-    end
-
-    def subscribe_with_timeout(timeout, *channels, &block)
-      subscription("subscribe", "unsubscribe", channels, block, timeout)
-    end
-
-    def psubscribe(*channels, &block)
-      subscription("psubscribe", "punsubscribe", channels, block)
-    end
-
-    def psubscribe_with_timeout(timeout, *channels, &block)
-      subscription("psubscribe", "punsubscribe", channels, block, timeout)
-    end
-
-    def unsubscribe(*channels)
-      call([:unsubscribe, *channels])
-    end
-
-    def punsubscribe(*channels)
-      call([:punsubscribe, *channels])
-    end
-
-  protected
-
-    def subscription(start, stop, channels, block, timeout = 0)
-      sub = Subscription.new(&block)
-
-      unsubscribed = false
-
-      begin
-        @client.call_loop([start, *channels], timeout) do |line|
-          type, *rest = line
-          sub.callbacks[type].call(*rest)
-          unsubscribed = type == stop && rest.last == 0
-          break if unsubscribed
-        end
-      ensure
-        # No need to unsubscribe here. The real client closes the connection
-        # whenever an exception is raised (see #ensure_connected).
-      end
-    end
-  end
-
-  class Subscription
-    attr :callbacks
-
-    def initialize
-      @callbacks = Hash.new do |hash, key|
-        hash[key] = lambda { |*_| }
-      end
-
-      yield(self)
-    end
-
-    def subscribe(&block)
-      @callbacks["subscribe"] = block
-    end
-
-    def unsubscribe(&block)
-      @callbacks["unsubscribe"] = block
-    end
-
-    def message(&block)
-      @callbacks["message"] = block
-    end
-
-    def psubscribe(&block)
-      @callbacks["psubscribe"] = block
-    end
-
-    def punsubscribe(&block)
-      @callbacks["punsubscribe"] = block
-    end
-
-    def pmessage(&block)
-      @callbacks["pmessage"] = block
-    end
-  end
-end
diff --git a/lib/vendor/redis/lib/redis/version.rb b/lib/vendor/redis/lib/redis/version.rb
deleted file mode 100644
index b5d80d2..0000000
--- a/lib/vendor/redis/lib/redis/version.rb
+++ /dev/null
@@ -1,3 +0,0 @@
-class Redis
-  VERSION = "3.3.3"
-end
diff --git a/spec/fixtures/gitlab_config_redis.yml b/spec/fixtures/gitlab_config_redis.yml
deleted file mode 100644
index cfe4166..0000000
--- a/spec/fixtures/gitlab_config_redis.yml
+++ /dev/null
@@ -1,11 +0,0 @@
-redis:
-  host: 127.0.1.1
-  port: 6378
-  pass: secure
-  database: 1
-  socket: /var/run/redis/redis.sock
-  namespace: my:gitlab
-  sentinels:
-    -
-      host: 127.0.0.1
-      port: 26380
diff --git a/spec/gitlab_config_spec.rb b/spec/gitlab_config_spec.rb
index e33e606..63cb2b3 100644
--- a/spec/gitlab_config_spec.rb
+++ b/spec/gitlab_config_spec.rb
@@ -4,21 +4,6 @@ require_relative '../lib/gitlab_config'
 describe GitlabConfig do
   let(:config) { GitlabConfig.new }
 
-  describe :redis do
-    before do
-      config_file = File.read('spec/fixtures/gitlab_config_redis.yml')
-      config.instance_variable_set(:@config, YAML.load(config_file))
-    end
-
-    it { config.redis['host'].should eq('127.0.1.1') }
-    it { config.redis['port'].should eq(6378) }
-    it { config.redis['database'].should eq(1) }
-    it { config.redis['namespace'].should eq('my:gitlab') }
-    it { config.redis['socket'].should eq('/var/run/redis/redis.sock') }
-    it { config.redis['pass'].should eq('secure') }
-    it { config.redis['sentinels'].should eq([{ 'host' => '127.0.0.1', 'port' => 26380 }]) }
-  end
-
   describe :gitlab_url do
     let(:url) { 'http://test.com' }
     subject { config.gitlab_url }
diff --git a/spec/gitlab_net_spec.rb b/spec/gitlab_net_spec.rb
index c22540b..8e06fa8 100644
--- a/spec/gitlab_net_spec.rb
+++ b/spec/gitlab_net_spec.rb
@@ -434,60 +434,4 @@ describe GitlabNet, vcr: true do
       store.should_receive(:add_path).with('test_path')
     end
   end
-
-  describe '#redis_client' do
-    let(:config) { double('config') }
-
-    context "with empty redis config" do
-      it 'returns default parameters' do
-        allow(gitlab_net).to receive(:config).and_return(config)
-        allow(config).to receive(:redis).and_return( {} )
-
-        expect_any_instance_of(Redis).to receive(:initialize).with({ host: '127.0.0.1',
-                                                                     port: 6379,
-                                                                     db: 0 })
-        gitlab_net.redis_client
-      end
-    end
-
-    context "with password" do
-      it 'uses the specified host, port, and password' do
-        allow(gitlab_net).to receive(:config).and_return(config)
-        allow(config).to receive(:redis).and_return( { 'host' => 'localhost', 'port' => 1123, 'pass' => 'secret' } )
-
-        expect_any_instance_of(Redis).to receive(:initialize).with({ host: 'localhost',
-                                                                     port: 1123,
-                                                                     db: 0,
-                                                                     password: 'secret'})
-        gitlab_net.redis_client
-      end
-    end
-
-    context "with sentinels" do
-      it 'uses the specified sentinels' do
-        allow(gitlab_net).to receive(:config).and_return(config)
-        allow(config).to receive(:redis).and_return({ 'host' => 'localhost', 'port' => 1123,
-                                                      'sentinels' => [{'host' => '127.0.0.1', 'port' => 26380}] })
-
-        expect_any_instance_of(Redis).to receive(:initialize).with({ host: 'localhost',
-                                                                     port: 1123,
-                                                                     db: 0,
-                                                                     sentinels: [{host: '127.0.0.1', port: 26380}] })
-        gitlab_net.redis_client
-      end
-    end
-
-
-    context "with redis socket" do
-      let(:socket) { '/tmp/redis.socket' }
-
-      it 'uses the socket' do
-        allow(gitlab_net).to receive(:config).and_return(config)
-        allow(config).to receive(:redis).and_return( { 'socket' => socket })
-
-        expect_any_instance_of(Redis).to receive(:initialize).with({ path: socket, db: 0 })
-        gitlab_net.redis_client
-      end
-    end
-  end
 end
diff --git a/spec/gitlab_post_receive_spec.rb b/spec/gitlab_post_receive_spec.rb
index 599dd1d..1b43db0 100644
--- a/spec/gitlab_post_receive_spec.rb
+++ b/spec/gitlab_post_receive_spec.rb
@@ -13,7 +13,6 @@ describe GitlabPostReceive do
   let(:gl_repository) { "project-1" }
   let(:gitlab_post_receive) { GitlabPostReceive.new(gl_repository, repo_path, actor, wrongly_encoded_changes) }
   let(:broadcast_message) { "test " * 10 + "message " * 10 }
-  let(:redis_client) { double('redis_client') }
   let(:enqueued_at) { Time.new(2016, 6, 23, 6, 59) }
   let(:new_merge_request_urls) do
     [{
@@ -36,199 +35,53 @@ describe GitlabPostReceive do
   end
 
   describe "#exec" do
-    context 'when the new post_receive API endpoint is not available' do
-      before do
-        GitlabNet.any_instance.stub(broadcast_message: { })
-        GitlabNet.any_instance.stub(:merge_request_urls).with(gl_repository, repo_path, wrongly_encoded_changes) { [] }
-        GitlabNet.any_instance.stub(notify_post_receive: true)
+    let(:response) { { 'reference_counter_decreased' => true } }
 
-        allow_any_instance_of(GitlabNet).to receive(:post_receive).and_raise(GitlabNet::NotFound)
-        allow_any_instance_of(GitlabNet).to receive(:redis_client).and_return(redis_client)
-        allow_any_instance_of(GitlabReferenceCounter).to receive(:redis_client).and_return(redis_client)
-        allow(redis_client).to receive(:get).and_return(1)
-        allow(redis_client).to receive(:incr).and_return(true)
-        allow(redis_client).to receive(:decr).and_return(0)
-        allow(redis_client).to receive(:rpush).and_return(true)
-        expect(Time).to receive(:now).and_return(enqueued_at)
-      end
-
-      context 'Without broad cast message' do
-        context 'pushing new branch' do
-          before do
-            GitlabNet.any_instance.stub(:merge_request_urls).with(gl_repository, repo_path, wrongly_encoded_changes) do
-              new_merge_request_urls
-            end
-          end
-
-          it "prints the new merge request url" do
-            assert_new_mr_printed(gitlab_post_receive)
-
-            gitlab_post_receive.exec
-          end
-        end
-
-        context 'pushing existing branch with merge request created' do
-          before do
-            GitlabNet.any_instance.stub(:merge_request_urls).with(gl_repository, repo_path, wrongly_encoded_changes) do
-              existing_merge_request_urls
-            end
-          end
-
-          it "prints the view merge request url" do
-            assert_existing_mr_printed(gitlab_post_receive)
-
-            gitlab_post_receive.exec
-          end
-        end
-      end
-
-      context 'show broadcast message and merge request link' do
-        before do
-          GitlabNet.any_instance.stub(:merge_request_urls).with(gl_repository, repo_path, wrongly_encoded_changes) do
-            new_merge_request_urls
-          end
-          GitlabNet.any_instance.stub(broadcast_message: { "message" => broadcast_message })
-        end
-
-        it 'prints the broadcast message and create new merge request link' do
-          assert_broadcast_message_printed(gitlab_post_receive)
-          assert_new_mr_printed(gitlab_post_receive)
-
-          gitlab_post_receive.exec
-        end
-      end
-
-      context 'Sidekiq jobs' do
-        it "pushes a Sidekiq job onto the queue" do
-          expect(redis_client).to receive(:rpush).with(
-            'resque:gitlab:queue:post_receive',
-            %Q/{"class":"PostReceive","args":["#{gl_repository}","#{actor}",#{base64_changes.inspect}],"jid":"#{gitlab_post_receive.jid}","enqueued_at":#{enqueued_at.to_f}}/
-          ).and_return(true)
-
-          gitlab_post_receive.exec
-        end
-
-        context 'when gl_repository is nil' do
-          let(:gl_repository) { nil }
-
-          it "pushes a Sidekiq job with the repository path" do
-            expect(redis_client).to receive(:rpush).with(
-              'resque:gitlab:queue:post_receive',
-              %Q/{"class":"PostReceive","args":["#{repo_path}","#{actor}",#{base64_changes.inspect}],"jid":"#{gitlab_post_receive.jid}","enqueued_at":#{enqueued_at.to_f}}/
-            ).and_return(true)
-
-            gitlab_post_receive.exec
-          end
-        end
-      end
-
-      context 'reference counter' do
-        it 'decreases the reference counter for the project' do
-          expect_any_instance_of(GitlabReferenceCounter).to receive(:decrease).and_return(true)
-
-          gitlab_post_receive.exec
-        end
-
-        context "when the redis command succeeds" do
-          before do
-            allow(redis_client).to receive(:decr).and_return(0)
-          end
-
-          it "returns true" do
-            expect(gitlab_post_receive.exec).to eq(true)
-          end
-        end
+    it 'calls the api to notify the execution of the hook' do
+      expect_any_instance_of(GitlabNet).to receive(:post_receive).and_return(response)
 
-        context "when the redis command fails" do
-          before do
-            allow(redis_client).to receive(:decr).and_raise('Fail')
-          end
-
-          it "returns false" do
-            expect(gitlab_post_receive.exec).to eq(false)
-          end
-        end
-      end
-
-      context 'post_receive notification' do
-        it 'calls the api to notify the execution of the hook' do
-          expect_any_instance_of(GitlabNet).to receive(:notify_post_receive).
-            with(gl_repository, repo_path)
-
-          gitlab_post_receive.exec
-        end
-      end
-
-      context "when the redis command succeeds" do
-        before do
-          allow(redis_client).to receive(:rpush).and_return(true)
-        end
-
-        it "returns true" do
-          expect(gitlab_post_receive.exec).to eq(true)
-        end
-      end
-
-      context "when the redis command fails" do
-        before do
-          allow(redis_client).to receive(:rpush).and_raise('Fail')
-        end
-
-        it "returns false" do
-          expect(gitlab_post_receive.exec).to eq(false)
-        end
-      end
+      expect(gitlab_post_receive.exec).to eq(true)
     end
 
-    context 'when the new post_receive API endpoint is available' do
-      let(:response) { { 'reference_counter_decreased' => true } }
+    context 'merge request urls and broadcast messages' do
+      let(:response) do
+        {
+          'reference_counter_decreased' => true,
+          'merge_request_urls' => new_merge_request_urls,
+          'broadcast_message' => broadcast_message
+        }
+      end
 
-      it 'calls the api to notify the execution of the hook' do
+      it 'prints the merge request urls and broadcast message' do
         expect_any_instance_of(GitlabNet).to receive(:post_receive).and_return(response)
+        assert_broadcast_message_printed(gitlab_post_receive)
+        assert_new_mr_printed(gitlab_post_receive)
 
         expect(gitlab_post_receive.exec).to eq(true)
       end
+    end
 
-      context 'merge request urls and broadcast messages' do
-        let(:response) do
-          {
-            'reference_counter_decreased' => true,
-            'merge_request_urls' => new_merge_request_urls,
-            'broadcast_message' => broadcast_message
-          }
-        end
-
-        it 'prints the merge request urls and broadcast message' do
-          expect_any_instance_of(GitlabNet).to receive(:post_receive).and_return(response)
-          assert_broadcast_message_printed(gitlab_post_receive)
-          assert_new_mr_printed(gitlab_post_receive)
-
-          expect(gitlab_post_receive.exec).to eq(true)
-        end
-      end
-
-      context 'when redirected message available' do
-        let(:message) do
-          <<-MSG
+    context 'when redirected message available' do
+      let(:message) do
+        <<-MSG
           Project 'foo/bar' was moved to 'foo/baz'.
 
           Please update your Git remote:
 
             git remote set-url origin http://localhost:3000/foo/baz.git
-          MSG
-        end
-        let(:response) do
-          { 
-            'reference_counter_decreased' => true,
-            'redirected_message' => message
-          } 
-        end
+        MSG
+      end
+      let(:response) do
+        { 
+          'reference_counter_decreased' => true,
+          'redirected_message' => message
+        } 
+      end
 
-        it 'prints redirected message' do
-          expect_any_instance_of(GitlabNet).to receive(:post_receive).and_return(response)
-          assert_redirected_message_printed(gitlab_post_receive)
-          expect(gitlab_post_receive.exec).to eq(true)
-        end
+      it 'prints redirected message' do
+        expect_any_instance_of(GitlabNet).to receive(:post_receive).and_return(response)
+        assert_redirected_message_printed(gitlab_post_receive)
+        expect(gitlab_post_receive.exec).to eq(true)
       end
     end
   end
diff --git a/spec/gitlab_reference_counter_spec.rb b/spec/gitlab_reference_counter_spec.rb
deleted file mode 100644
index 5be53ff..0000000
--- a/spec/gitlab_reference_counter_spec.rb
+++ /dev/null
@@ -1,38 +0,0 @@
-# coding: utf-8
-require 'spec_helper'
-require 'gitlab_reference_counter'
-
-describe GitlabReferenceCounter do
-  let(:redis_client) { double('redis_client') }
-  let(:reference_counter_key) { "git-receive-pack-reference-counter:/test/path" }
-  let(:gitlab_reference_counter) { GitlabReferenceCounter.new('/test/path') }
-
-  before do
-    allow(gitlab_reference_counter).to receive(:redis_client).and_return(redis_client)
-    $logger = double('logger').as_null_object
-  end
-
-  it 'increases and set the expire time of a reference count for a path' do
-    expect(redis_client).to receive(:incr).with(reference_counter_key)
-    expect(redis_client).to receive(:expire).with(reference_counter_key, GitlabReferenceCounter::REFERENCE_EXPIRE_TIME)
-    expect(gitlab_reference_counter.increase).to be(true)
-  end
-
-  it 'decreases the reference count for a path' do
-    allow(redis_client).to receive(:decr).and_return(0)
-    expect(redis_client).to receive(:decr).with(reference_counter_key)
-    expect(gitlab_reference_counter.decrease).to be(true)
-  end
-
-  it 'warns if attempting to decrease a counter with a value of one or less, and resets the counter' do
-    expect(redis_client).to receive(:decr).and_return(-1)
-    expect(redis_client).to receive(:del)
-    expect($logger).to receive(:warn).with("Reference counter for /test/path decreased when its value was less than 1. Reseting the counter.")
-    expect(gitlab_reference_counter.decrease).to be(true)
-  end
-
-  it 'get the reference count for a path' do
-    allow(redis_client).to receive(:get).and_return(1)
-    expect(gitlab_reference_counter.value).to be(1)
-  end
-end