class Squid < Formula
  desc "Advanced proxy caching server for HTTP, HTTPS, FTP, and Gopher"
  homepage "http://www.squid-cache.org/"
  url "http://www.squid-cache.org/Versions/v4/squid-4.9.tar.xz"
  sha256 "1cb1838c6683b0568a3a4050f4ea2fc1eaa5cbba6bdf7d57f7258c7cd7b41fa1"

  bottle do
    sha256 "eb88a0963a5793de409259e8cb913b9e24bd3d3b536112142426ad1fcef7428f" => :catalina
    sha256 "ee3a1e05ca15a5505baef58f33ad86d109cf104edeec514de69310a2532eafeb" => :mojave
    sha256 "6e4b5b7033c57b70fb6f9de126bc5526c4bad7a153151bf80569ec31d77ffc24" => :high_sierra
  end

  head do
    url "lp:squid", :using => :bzr

    depends_on "autoconf" => :build
    depends_on "automake" => :build
    depends_on "libtool" => :build
  end

  depends_on "openssl@1.1"

  def install
    # https://stackoverflow.com/questions/20910109/building-squid-cache-on-os-x-mavericks
    ENV.append "LDFLAGS", "-lresolv"

    # For --disable-eui, see:
    # http://www.squid-cache.org/mail-archive/squid-users/201304/0040.html
    args = %W[
      --disable-debug
      --disable-dependency-tracking
      --prefix=#{prefix}
      --localstatedir=#{var}
      --sysconfdir=#{etc}
      --enable-ssl
      --enable-ssl-crtd
      --disable-eui
      --enable-pf-transparent
      --with-included-ltdl
      --with-openssl
      --enable-delay-pools
      --enable-disk-io=yes
      --enable-removal-policies=yes
      --enable-storeio=yes
    ]

    system "./bootstrap.sh" if build.head?
    system "./configure", *args
    system "make", "install"
  end

  plist_options :manual => "squid"

  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_sbin}/squid</string>
        <string>-N</string>
        <string>-d 1</string>
      </array>
      <key>RunAtLoad</key>
      <true/>
      <key>WorkingDirectory</key>
      <string>#{var}</string>
    </dict>
    </plist>
  EOS
  end

  test do
    assert_match version.to_s, shell_output("#{sbin}/squid -v")

    pid = fork do
      exec "#{sbin}/squid"
    end
    sleep 2

    begin
      system "#{sbin}/squid", "-k", "check"
    ensure
      exec "#{sbin}/squid -k interrupt"
      Process.wait(pid)
    end
  end
end