# 3.0 (unreleased)

* The `ZRANGE`, `ZREVRANGE`, `ZRANGEBYSCORE` and `ZREVRANGEBYSCORE` commands
  now return an array containing `[String, Float]` pairs when
  `:with_scores => true` is passed.

* The `ZINCRBY` and `ZSCORE` commands now return a `Float` score instead
  of a string holding a representation of the score.

* The client now raises custom exceptions where it makes sense.

  If by any chance you were rescuing low-level exceptions (`Errno::*`),
  you should now rescue as follows:

      Errno::ECONNRESET    -> Redis::ConnectionError
      Errno::EPIPE         -> Redis::ConnectionError
      Errno::ECONNABORTED  -> Redis::ConnectionError
      Errno::EBADF         -> Redis::ConnectionError
      Errno::EINVAL        -> Redis::ConnectionError
      Errno::EAGAIN        -> Redis::TimeoutError
      Errno::ECONNREFUSED  -> Redis::CannotConnectError

* Always raise exceptions originating from erroneous command invocation
  inside pipelines and MULTI/EXEC blocks.

  The old behavior (swallowing exceptions) could cause application bugs
  to go unnoticed.

* Implement futures for assigning values inside pipelines and MULTI/EXEC
  blocks. Futures are assigned their value after the pipeline or
  MULTI/EXEC block has executed.

```ruby
$redis.pipelined do
  @future = $redis.get "key"
end

puts @future.value
```

* Ruby 1.8.6 is officially not supported.

* Support `ZCOUNT` in `Redis::Distributed` (Michael Dungan).

* Pipelined commands now return the same replies as when called outside
  a pipeline.

  In the past, pipelined replies were returned without post-processing.

* Support `SLOWLOG` command (Michael Bernstein).

* Calling `SHUTDOWN` effectively disconnects the client (Stefan Kaes).

* Basic support for mapping commands so that they can be renamed on the
  server.

* Connecting using a URL now checks that a host is given.

  It's just a small sanity check, cf. #126

* Support variadic commands introduced in Redis 2.4.

# 2.2.2

* Added method `Redis::Distributed#hsetnx`.

# 2.2.1

* Internal API: Client#call and family are now called with a single array
  argument, since splatting a large number of arguments (100K+) results in a
  stack overflow on 1.9.2.

* The `INFO` command can optionally take a subcommand. When the subcommand is
  `COMMANDSTATS`, the client will properly format the returned statistics per
  command. Subcommands for `INFO` are available since Redis v2.3.0 (unstable).

* Change `IO#syswrite` back to the buffered `IO#write` since some Rubies do
  short writes for large (1MB+) buffers and some don't (see issue #108).

# 2.2.0

* Added method `Redis#without_reconnect` that ensures the client will not try
  to reconnect when running the code inside the specified block.

* Thread-safe by default. Thread safety can be explicitly disabled by passing
  `:thread_safe => false` as argument.

* Commands called inside a MULTI/EXEC no longer raise error replies, since a
  successful EXEC means the commands inside the block were executed.

* MULTI/EXEC blocks are pipelined.

* Don't disconnect on error replies.

* Use `IO#syswrite` instead of `IO#write` because write buffering is not
  necessary.

* Connect to a unix socket by passing the `:path` option as argument.

* The timeout value is coerced into a float, allowing sub-second timeouts.

* Accept both `:with_scores` _and_ `:withscores` as argument to sorted set
  commands.

* Use [hiredis](https://github.com/pietern/hiredis-rb) (v0.3 or higher) by
  requiring "redis/connection/hiredis".

* Use [em-synchrony](https://github.com/igrigorik/em-synchrony) by requiring
  "redis/connection/synchrony".

# 2.1.1

See commit log.