class PostgresqlAT94 < Formula
  desc "Object-relational database system"
  homepage "https://www.postgresql.org/"
  url "https://ftp.postgresql.org/pub/source/v9.4.21/postgresql-9.4.21.tar.bz2"
  sha256 "0049b4d239a00654e792997aff32a0be7a6bdd922b5ca97f1a06797cd4d06006"

  bottle do
    sha256 "3fd6872d143ec711380d08ba47e29da0f9fe220dd0fac612f32d9eff021d5f5d" => :mojave
    sha256 "83c90a0b6fef62109823acd268a038a164dbe8bcc031cba69a051293dfbf0265" => :high_sierra
    sha256 "b3454731c5a8287a593a134be10db6ab249c8734060f3cd1f32b465594bda610" => :sierra
  end

  keg_only :versioned_formula

  depends_on "openssl"
  depends_on "readline"

  def install
    # Fix "configure: error: readline library not found"
    if MacOS.version == :sierra || MacOS.version == :el_capitan
      ENV["SDKROOT"] = MacOS.sdk_path
    end

    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}"
    ENV.prepend "PG_SYSROOT", MacOS.sdk_path
    ENV.append_to_cflags "-D_XOPEN_SOURCE"

    args = %W[
      --disable-debug
      --prefix=#{prefix}
      --datadir=#{pkgshare}
      --docdir=#{doc}
      --enable-thread-safety
      --with-bonjour
      --with-gssapi
      --with-ldap
      --with-openssl
      --with-pam
      --with-libxml
      --with-libxslt
      --with-perl
      --with-uuid=e2fs
    ]

    # The CLT is required to build tcl support on 10.7 and 10.8 because tclConfig.sh is not part of the SDK
    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

    system "./configure", *args
    system "make", "install-world"
  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-9.3) of PostgreSQL, see:
        https://www.postgresql.org/docs/9.3/static/upgrading.html

      When installing the postgres gem, including ARCHFLAGS is recommended:
        ARCHFLAGS="-arch x86_64" gem install pg

      To install gems without sudo, see the Homebrew documentation:
        https://docs.brew.sh/Gems,-Eggs-and-Perl-Modules
    EOS
  end

  plist_options :manual => "pg_ctl -D #{HOMEBREW_PREFIX}/var/postgresql@9.4 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"
  end
end