class PostgresqlAT95 < Formula
  desc "Object-relational database system"
  homepage "https://www.postgresql.org/"
  url "https://ftp.postgresql.org/pub/source/v9.5.7/postgresql-9.5.7.tar.bz2"
  sha256 "8b1e936f82109325decc0f5575e846b93fb4fd384e8c4bde83ff5e7f87fc6cad"

  bottle do
    sha256 "6cfcc59cb1c98a964e6f191d2f9c459574bee8ca8e78e389409cb80f7f9feed6" => :sierra
    sha256 "4949ac441c6c9f261f9783b028faadfab06bbe2572c22f17d02d96532b21349a" => :el_capitan
    sha256 "87f87eb5edad293873e86f6ae079cd4b24e2dad64db0657167e54a06760ec795" => :yosemite
  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 Python2 (incompatible with --with-python3)"
  option "with-python3", "Build with Python3 (incompatible with --with-python)"

  depends_on "openssl"
  depends_on "readline"
  depends_on :python => :optional
  depends_on :python3 => :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?("python3")
      odie "Cannot provide both --with-python and --with-python3"
    elsif build.with?("python") || build.with?("python3")
      args << "--with-python"
      which_python = which(build.with?("python") ? "python" : "python3")
    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}/usr/lib/tclConfig.sh")
        args << "--with-tclconfig=#{MacOS.sdk_path}/usr/lib"
      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.undent
    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.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>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