class PostgresqlAT95 < Formula
  desc "Object-relational database system"
  homepage "https://www.postgresql.org/"
  url "https://ftp.postgresql.org/pub/source/v9.5.13/postgresql-9.5.13.tar.bz2"
  sha256 "5408b86a0b56fd0140c6a0016bf9179bc7817fa03d5571cca346c9ab122ea5ee"

  bottle do
    sha256 "9d0f806e9c2d788f78ea1fee7f613f93b3e96318422b7c99112132a76d29c80a" => :high_sierra
    sha256 "0a93ceceabf470e6ec1c0c5ff7e905e041c14c38b0bcc2799288e3aef81c1a5e" => :sierra
    sha256 "851f897c89a6e9dabe205295017fd6cd87f863811b3dc7da93f6339931dca9ea" => :el_capitan
  end

  keg_only :versioned_formula

  option "without-perl", "Build without Perl support"
  option "without-tcl", "Build without Tcl support"
  option "with-dtrace", "Build with DTrace support"
  option "with-python", "Build with Python3 (incompatible with --with-python@2)"
  option "with-python@2", "Build with Python2 (incompatible with --with-python)"

  deprecated_option "with-python3" => "with-python"

  depends_on "openssl"
  depends_on "readline"
  depends_on "python" => :optional
  depends_on "python@2" => :optional

  fails_with :clang do
    build 211
    cause "Miscompilation resulting in segfault on queries"
  end

  def install
    ENV.prepend "LDFLAGS", "-L#{Formula["openssl"].opt_lib} -L#{Formula["readline"].opt_lib}"
    ENV.prepend "CPPFLAGS", "-I#{Formula["openssl"].opt_include} -I#{Formula["readline"].opt_include}"

    # avoid adding the SDK library directory to the linker search path
    ENV["XML2_CONFIG"] = "xml2-config --exec-prefix=/usr"

    args = %W[
      --disable-debug
      --prefix=#{prefix}
      --datadir=#{pkgshare}
      --libdir=#{lib}
      --sysconfdir=#{prefix}/etc
      --docdir=#{doc}
      --enable-thread-safety
      --with-bonjour
      --with-gssapi
      --with-ldap
      --with-openssl
      --with-pam
      --with-libxml
      --with-libxslt
    ]

    args << "--with-perl" if build.with? "perl"

    which_python = nil
    if build.with?("python") && build.with?("python@2")
      odie "Cannot provide both --with-python and --with-python@2"
    elsif build.with?("python") || build.with?("python@2")
      args << "--with-python"
      which_python = which(build.with?("python") ? "python3" : "python2.7")
    end
    ENV["PYTHON"] = which_python

    # The CLT is required to build Tcl support on 10.7 and 10.8 because
    # tclConfig.sh is not part of the SDK
    if build.with?("tcl") && (MacOS.version >= :mavericks || MacOS::CLT.installed?)
      args << "--with-tcl"

      if File.exist?("#{MacOS.sdk_path}/System/Library/Frameworks/Tcl.framework/tclConfig.sh")
        args << "--with-tclconfig=#{MacOS.sdk_path}/System/Library/Frameworks/Tcl.framework"
      end
    end

    args << "--enable-dtrace" if build.with? "dtrace"
    args << "--with-uuid=e2fs"

    system "./configure", *args
    system "make"
    system "make", "install-world", "datadir=#{pkgshare}",
                                    "libdir=#{lib}",
                                    "pkglibdir=#{lib}"
  end

  def post_install
    (var/"log").mkpath
    (var/name).mkpath
    unless File.exist? "#{var}/#{name}/PG_VERSION"
      system "#{bin}/initdb", "#{var}/#{name}"
    end
  end

  def caveats; <<~EOS
    If builds of PostgreSQL 9 are failing and you have version 8.x installed,
    you may need to remove the previous version first. See:
      https://github.com/Homebrew/legacy-homebrew/issues/2510

    To migrate existing data from a previous major version (pre-9.0) of PostgreSQL, see:
      https://www.postgresql.org/docs/9.5/static/upgrading.html

    To migrate existing data from a previous minor version (9.0-9.4) of PostgreSQL, see:
      https://www.postgresql.org/docs/9.5/static/pgupgrade.html

      You will need your previous PostgreSQL installation from brew to perform `pg_upgrade`.
      Do not run `brew cleanup postgresql@9.5` until you have performed the migration.
    EOS
  end

  plist_options :manual => "pg_ctl -D #{HOMEBREW_PREFIX}/var/postgresql@9.5 start"

  def plist; <<~EOS
    <?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>ProgramArguments</key>
      <array>
        <string>#{opt_bin}/postgres</string>
        <string>-D</string>
        <string>#{var}/#{name}</string>
      </array>
      <key>RunAtLoad</key>
      <true/>
      <key>WorkingDirectory</key>
      <string>#{HOMEBREW_PREFIX}</string>
      <key>StandardErrorPath</key>
      <string>#{var}/log/#{name}.log</string>
    </dict>
    </plist>
    EOS
  end

  test do
    system "#{bin}/initdb", testpath/"test"
    assert_equal pkgshare.to_s, shell_output("#{bin}/pg_config --sharedir").chomp
    assert_equal lib.to_s, shell_output("#{bin}/pg_config --libdir").chomp
    assert_equal lib.to_s, shell_output("#{bin}/pg_config --pkglibdir").chomp
  end
end