class PerconaServer < Formula
  desc "Drop-in MySQL replacement"
  homepage "https://www.percona.com"
  url "https://www.percona.com/downloads/Percona-Server-5.7/Percona-Server-5.7.17-13/source/tarball/percona-server-5.7.17-13.tar.gz"
  sha256 "31abe11f5aa7a85be4a2834e68abdd1fcb42016e73136b5da2b47070d7497a93"

  bottle do
    rebuild 2
    sha256 "945f68c016119599a33c34fb3f18310546f5631a7042ee8d73dd021049a6ec5a" => :sierra
    sha256 "83b82b15a19c8f5764bbee437a6eeb82242ad95dbb92b7c4d752907fa0d1b721" => :el_capitan
    sha256 "b56e1431a778649e6f0cfccef69180f0f7efad87ebfc31036a6a96b1c803ed38" => :yosemite
  end

  option "with-test", "Build with unit tests"
  option "with-embedded", "Build the embedded server"
  option "with-local-infile", "Build with local infile loading support"

  deprecated_option "enable-local-infile" => "with-local-infile"
  deprecated_option "with-tests" => "with-test"

  depends_on "cmake" => :build
  depends_on "pidof" unless MacOS.version >= :mountain_lion
  depends_on "openssl"

  conflicts_with "mysql-connector-c",
    :because => "both install `mysql_config`"

  conflicts_with "mariadb", "mysql", "mysql-cluster",
    :because => "percona, mariadb, and mysql install the same binaries."
  conflicts_with "mysql-connector-c",
    :because => "both install MySQL client libraries"
  conflicts_with "mariadb-connector-c",
    :because => "both install plugins"

  resource "boost" do
    url "https://downloads.sourceforge.net/project/boost/boost/1.59.0/boost_1_59_0.tar.bz2"
    sha256 "727a932322d94287b62abb1bd2d41723eec4356a7728909e38adb65ca25241ca"
  end

  # Where the database files should be located. Existing installs have them
  # under var/percona, but going forward they will be under var/mysql to be
  # shared with the mysql and mariadb formulae.
  def datadir
    @datadir ||= (var/"percona").directory? ? var/"percona" : var/"mysql"
  end

  pour_bottle? do
    reason "The bottle needs a var/mysql datadir (yours is var/percona)."
    satisfy { datadir == var/"mysql" }
  end

  def install
    # Don't hard-code the libtool path. See:
    # https://github.com/Homebrew/homebrew/issues/20185
    inreplace "cmake/libutils.cmake",
      "COMMAND /usr/bin/libtool -static -o ${TARGET_LOCATION}",
      "COMMAND libtool -static -o ${TARGET_LOCATION}"

    args = std_cmake_args + %W[
      -DMYSQL_DATADIR=#{datadir}
      -DSYSCONFDIR=#{etc}
      -DINSTALL_MANDIR=#{man}
      -DINSTALL_DOCDIR=#{doc}
      -DINSTALL_INFODIR=#{info}
      -DINSTALL_INCLUDEDIR=include/mysql
      -DINSTALL_MYSQLSHAREDIR=#{share.basename}/mysql
      -DWITH_SSL=yes
      -DDEFAULT_CHARSET=utf8
      -DDEFAULT_COLLATION=utf8_general_ci
      -DCOMPILATION_COMMENT=Homebrew
      -DWITH_EDITLINE=system
    ]

    # PAM plugin is Linux-only at the moment
    args.concat %w[
      -DWITHOUT_AUTH_PAM=1
      -DWITHOUT_AUTH_PAM_COMPAT=1
      -DWITHOUT_DIALOG=1
    ]

    # TokuDB is broken on MacOsX
    # https://bugs.launchpad.net/percona-server/+bug/1531446
    args.concat %w[-DWITHOUT_TOKUDB=1]

    # MySQL >5.7.x mandates Boost as a requirement to build & has a strict
    # version check in place to ensure it only builds against expected release.
    # This is problematic when Boost releases don't align with MySQL releases.
    (buildpath/"boost_1_59_0").install resource("boost")
    args << "-DWITH_BOOST=#{buildpath}/boost_1_59_0"

    # To enable unit testing at build, we need to download the unit testing suite
    if build.with? "test"
      args << "-DENABLE_DOWNLOADS=ON"
    else
      args << "-DWITH_UNIT_TESTS=OFF"
    end

    # Build the embedded server
    args << "-DWITH_EMBEDDED_SERVER=ON" if build.with? "embedded"

    # Build with InnoDB Memcached plugin
    args << "-DWITH_INNODB_MEMCACHED=ON" if build.with? "memcached"

    # Build with local infile loading support
    args << "-DENABLED_LOCAL_INFILE=1" if build.with? "local-infile"

    system "cmake", *args
    system "make"
    system "make", "install"

    # Don't create databases inside of the prefix!
    # See: https://github.com/Homebrew/homebrew/issues/4975
    rm_rf prefix+"data"

    # Fix up the control script and link into bin
    inreplace "#{prefix}/support-files/mysql.server" do |s|
      s.gsub!(/^(PATH=".*)(")/, "\\1:#{HOMEBREW_PREFIX}/bin\\2")
      # pidof can be replaced with pgrep from proctools on Mountain Lion
      s.gsub!(/pidof/, "pgrep") if MacOS.version >= :mountain_lion
    end

    bin.install_symlink prefix/"support-files/mysql.server"

    # Install my.cnf that binds to 127.0.0.1 by default
    (buildpath/"my.cnf").write <<-EOS.undent
      # Default Homebrew MySQL server config
      [mysqld]
      # Only allow connections from localhost
      bind-address = 127.0.0.1
    EOS
    etc.install "my.cnf"
  end

  def caveats; <<-EOS.undent
    A "/etc/my.cnf" from another install may interfere with a Homebrew-built
    server starting up correctly.

    MySQL is configured to only allow connections from localhost by default

    To connect:
        mysql -uroot

    To initialize the data directory:
        mysqld --initialize --datadir=#{datadir} --user=#{ENV["USER"]}
    EOS
  end

  plist_options :manual => "mysql.server start"

  def plist; <<-EOS.undent
    <?xml version="1.0" encoding="UTF-8"?>
    <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
    <plist version="1.0">
    <dict>
      <key>KeepAlive</key>
      <true/>
      <key>Label</key>
      <string>#{plist_name}</string>
      <key>Program</key>
      <string>#{opt_bin}/mysqld_safe</string>
      <key>RunAtLoad</key>
      <true/>
      <key>WorkingDirectory</key>
      <string>#{var}</string>
    </dict>
    </plist>
    EOS
  end
end