osx: update Homebrew formula

[thirdparty/lldpd.git] / osx / lldpd.rb

class Lldpd < Formula
  desc "Implementation of IEEE 802.1ab (LLDP)"
  homepage "https://vincentbernat.github.io/lldpd/"
  url "https://media.luffy.cx/files/lldpd/lldpd-0.9.9.tar.gz"
  sha256 "5e9e08f500d21376631cbc9f8e19a4b167cd38eb2d8fd9e660b8e80507f802db"

  option "with-snmp", "Build SNMP subagent support"

  depends_on "pkg-config" => :build
  depends_on "readline"
  depends_on "libevent"
  depends_on "net-snmp" if build.with? "snmp"

  def install
    readline = Formula["readline"]
    args = [
      "--prefix=#{prefix}",
      "--sysconfdir=#{etc}",
      "--localstatedir=#{var}",
      "--with-xml",
      "--with-readline",
      "--with-privsep-chroot=/var/empty",
      "--with-launchddaemonsdir=no",
      "CPPFLAGS=-I#{readline.include} -DRONLY=1",
      "LDFLAGS=-L#{readline.lib}",
    ]
    args << (build.with?("snmp") ? "--with-snmp" : "--without-snmp")

    system "./configure", *args
    system "make"
    system "make", "install"
  end

  def post_install
    (var/"run").mkpath
  end

  def dscl(*args)
    result = `dscl . -#{args.join(' ')} 2> /dev/null`
    if $? != 0
      raise ErrorDuringExecution, "Failure while executing dscl: #{args.join(' ')}"
    end
    return result
  end

  # Create user and group if needed
  def caveats
    u = "_lldpd"
    unless Kernel.system "/usr/bin/dscl . -read /Users/#{u} &> /dev/null"
      # Find a free UID/GID
      uids = dscl("list /Users uid")
      gids = dscl("list /Groups gid")
      uid = 200
      while uids =~ Regexp.new("#{Regexp.escape(uid.to_s)}\n") || gids =~ Regexp.new("#{Regexp.escape(uid.to_s)}\n")
        uid += 1
      end
      s = <<-EOS.undent
        You need to create a special user to run lldpd.
        Just type the following commands:
            sudo dscl . -create /Groups/#{u}
            sudo dscl . -create /Groups/#{u} PrimaryGroupID #{uid.to_s}
            sudo dscl . -create /Groups/#{u} Password "*"
            sudo dscl . -create /Groups/#{u} RealName "lldpd privilege separation group"
            sudo dscl . -create /Users/#{u}
            sudo dscl . -create /Users/#{u} UserShell /usr/bin/false
            sudo dscl . -create /Users/#{u} NFSHomeDirectory /var/empty
            sudo dscl . -create /Users/#{u} PrimaryGroupID #{uid.to_s}
            sudo dscl . -create /Users/#{u} UniqueID #{uid.to_s}
            sudo dscl . -create /Users/#{u} Password "*"
            sudo dscl . -create /Users/#{u} RealName "lldpd privilege separation user"
      EOS
      return s
    end
  end

  plist_options :startup => true

  def plist
    additional_args = ""
    additional_args += "<string>-x</string>" if build.with? "snmp"
    <<-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>Label</key>
      <string>#{plist_name}</string>
      <key>ProgramArguments</key>
      <array>
        <string>#{opt_sbin}/lldpd</string>
        #{additional_args}
      </array>
      <key>RunAtLoad</key><true/>
      <key>KeepAlive</key><true/>
    </dict>
    </plist>
    EOS
  end
end