kafka080.rb

require "formula"

class Kafka080 < Formula
  homepage 'http://kafka.apache.org'
  url 'https://archive.apache.org/dist/kafka/0.8.0/kafka-0.8.0-src.tgz'
  sha1 '051e72b9ed9c3342c4e1210ffa9a9f4364171f26'

  depends_on 'zookeeper'

  conflicts_with 'kafka',
                 :because => 'kafka080 and kafka install the same binaries.'

  def install
    system "./sbt", "update"
    system "./sbt", "package"
    system "./sbt", "assembly-package-dependency"

    # Use 1 partition by default so individual consumers receive all topic messages
    inreplace "config/server.properties", "num.partitions=2", "num.partitions=1"

    logs = var/"log/kafka"
    inreplace "config/log4j.properties", ".File=logs/", ".File=#{logs}/"
    inreplace "config/test-log4j.properties", ".File=logs/", ".File=#{logs}/"

    data = var/"lib"
    inreplace "config/server.properties",
              "log.dirs=/tmp/kafka-logs", "log.dirs=#{data}/kafka-logs"

    inreplace "config/zookeeper.properties",
              "dataDir=/tmp/zookeeper", "dataDir=#{data}/zookeeper"

    libexec.install %w(contrib core examples lib perf system_test)

    prefix.install "bin"
    bin.env_script_all_files(libexec/"bin", :JAVA_HOME => "`/usr/libexec/java_home`")

    (etc+"kafka").install Dir["config/*"]
  end

  def caveats;
    <<-EOS.undent
    To start Kafka, ensure that ZooKeeper is running and then execute:
      kafka-server-start.sh #{etc}/kafka/server.properties
    EOS
  end
end