Class: Heel::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/heel/server.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(argv = []) ⇒ Server

Returns a new instance of Server.



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# File 'lib/heel/server.rb', line 37

def initialize(argv = [])
  argv ||= []

  set_io

  @options        = default_options
  @parsed_options = ::OpenStruct.new
  @parser         = option_parser
  @error_message  = nil

  begin
    @parser.parse!(argv)
  rescue ::OptionParser::ParseError => pe
    msg = ["#{@parser.program_name}: #{pe}",
                    "Try `#{@parser.program_name} --help` for more information"]
                    @error_message = msg.join("\n")
  end
end

Instance Attribute Details

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/heel/server.rb', line 16

def options
  @options
end

#parsed_options ⇒ Object

Returns the value of attribute parsed_options.



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# File 'lib/heel/server.rb', line 17

def parsed_options
  @parsed_options
end

#stderr ⇒ Object (readonly)

Returns the value of attribute stderr.



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# File 'lib/heel/server.rb', line 20

def stderr
  @stderr
end

#stdin ⇒ Object (readonly)

Returns the value of attribute stdin.



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# File 'lib/heel/server.rb', line 21

def stdin
  @stdin
end

#stdout ⇒ Object (readonly)

Returns the value of attribute stdout.



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# File 'lib/heel/server.rb', line 19

def stdout
  @stdout
end

Class Method Details

.home_directory ⇒ Object

thank you Jamis - from Capistrano



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# File 'lib/heel/server.rb', line 26

def home_directory # :nodoc:
  ENV["HOME"] ||
    (ENV["HOMEPATH"] && "#{ENV["HOMEDRIVE"]}#{ENV["HOMEPATH"]}") ||
              "/"
end

.kill_existing_proc ⇒ Object 



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# File 'lib/heel/server.rb', line 32

def kill_existing_proc
  Heel::Server.new.kill_existing_proc
end

Instance Method Details

#default_directory ⇒ Object 



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# File 'lib/heel/server.rb', line 72

def default_directory
  ENV["HEEL_DEFAULT_DIRECTORY"] || File.join(::Heel::Server.home_directory,".heel")
end

#default_options ⇒ Object 



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# File 'lib/heel/server.rb', line 56

def default_options
  if @default_options.nil? then
    @default_options                 = ::OpenStruct.new
    @default_options.show_version    = false
    @default_options.show_help       = false
    @default_options.address         = "0.0.0.0"
    @default_options.port            = 4331
    @default_options.document_root   = Dir.pwd
    @default_options.daemonize       = false
    @default_options.highlighting    = true
    @default_options.kill            = false
    @default_options.launch_browser  = true
  end
  return @default_options
end

#ensure_not_running ⇒ Object

make sure that if we are daemonizing the process is not running



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# File 'lib/heel/server.rb', line 198

def ensure_not_running
  if options.daemonize and File.exist?(pid_file) then
    @stdout.puts "ERROR: PID File #{pid_file} already exists.  Heel may already be running."
    @stdout.puts "ERROR: Check the Log file #{log_file}"
    @stdout.puts "ERROR: Heel will not start until the .pid file is cleared (`heel --kill' to clean it up)."
    exit 1
  end
end

#error_version_help_kill ⇒ Object

if Version or Help options are set, then output the appropriate information instead of running the server.



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# File 'lib/heel/server.rb', line 152

def error_version_help_kill
  if @parsed_options.show_version then
    @stdout.puts "#{@parser.program_name}: version #{Heel::VERSION}"
    exit 0
  elsif @parsed_options.show_help then
    @stdout.puts @parser.to_s
    exit 0
  elsif @error_message then
    @stdout.puts @error_message
    exit 1
  elsif @parsed_options.kill then
    kill_existing_proc
  end
end

#kill_existing_proc ⇒ Object

kill an already running background heel process



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# File 'lib/heel/server.rb', line 168

def kill_existing_proc
  if File.exists?(pid_file) then
    begin
      pid = open(pid_file).read.to_i
      @stdout.puts "Sending TERM to process #{pid}"
      Process.kill("TERM", pid)
    rescue Errno::ESRCH
      @stdout.puts "Unable to kill process with pid #{pid}.  Process does not exist.  Removing stale pid file."
      File.unlink(pid_file)
    rescue Errno::EPERM 
      @stdout.puts "Unable to kill process with pid #{pid}.  No permissions to kill process."
    end
  else
    @stdout.puts "No pid file exists, no process to kill"
  end
  @stdout.puts "Done."
  exit 0
end

#launch_browser ⇒ Object 



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# File 'lib/heel/server.rb', line 207

def launch_browser
  Thread.new do 
    print "Launching your browser"
    if options.daemonize then
      puts " at http://#{options.address}:#{options.port}/"
    else
      puts "..."
    end
    ::Launchy.open("http://#{options.address}:#{options.port}/")
  end
end

#log_file ⇒ Object 



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# File 'lib/heel/server.rb', line 80

def log_file
  File.join(default_directory,"heel.log")
end

#merge_options ⇒ Object 



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# File 'lib/heel/server.rb', line 133

def merge_options
  options = default_options.marshal_dump
  @parsed_options.marshal_dump.each_pair do |key,value|
    options[key] = value
  end

  @options = OpenStruct.new(options)
end

#option_parser ⇒ Object 



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# File 'lib/heel/server.rb', line 84

def option_parser
  OptionParser.new do |op|
    op.separator ""

    op.on("-a", "--address ADDRESS", "Address to bind to",
                                    "  (default: #{default_options.address})") do |add|
      @parsed_options.address = add
                                    end

    op.on("-d", "--daemonize", "Run daemonized in the background") do 
      raise ::OptionParser::ParseError, "Daemonizing is not supported on windows" if Thin.win? 
      @parsed_options.daemonize = true
    end

    op.on("-h", "--help", "Display this text") do 
      @parsed_options.show_help = true
    end

    op.on("-k", "--kill", "Kill an existing daemonized heel process") do
      @parsed_options.kill = true
    end

    op.on("--[no-]highlighting", "Turn on or off syntax highlighting",
                                         "  (default: on)") do |highlighting|
      @parsed_options.highlighting = highlighting
                                         end

    op.on("--[no-]launch-browser", "Turn on or off automatic browser launch",
                                           "  (default: on)") do |l|
      @parsed_options.launch_browser = l
                                           end

    op.on("-p", "--port PORT", Integer, "Port to bind to",
                                    "  (default: #{default_options.port})") do |port|
      @parsed_options.port = port
                                    end

    op.on("-r","--root ROOT", 
                  "Set the document root"," (default: #{default_options.document_root})") do |document_root|
      @parsed_options.document_root = File.expand_path(document_root)
      raise ::OptionParser::ParseError, "#{@parsed_options.document_root} is not a valid directory" if not File.directory?(@parsed_options.document_root)
                  end

    op.on("-v", "--version", "Show version") do 
      @parsed_options.show_version = true
    end
  end
end

#pid_file ⇒ Object 



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# File 'lib/heel/server.rb', line 76

def pid_file
  File.join(default_directory,"heel.pid")
end

#run ⇒ Object

run the heel server with the current options.



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# File 'lib/heel/server.rb', line 280

def run

  error_version_help_kill
  merge_options
  setup_heel_dir
  ensure_not_running

  server_thread = start_thin_server

  if options.launch_browser then
    launch_browser.join
  end
  server_thread.join
end

#set_io(stdin = $stdin, stdout = $stdout, setderr = $stderr) ⇒ Object

set the IO objects in a single method call. This is really only for testing instrumentation



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# File 'lib/heel/server.rb', line 144

def set_io(stdin = $stdin, stdout = $stdout ,setderr = $stderr)
  @stdin  = stdin
  @stdout = stdout
  @stderr = stderr
end

#setup_heel_dir ⇒ Object

setup the directory that heel will use as the location to run from, where its logs will be stored and its PID file if backgrounded.



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# File 'lib/heel/server.rb', line 189

def setup_heel_dir
  if not File.exists?(default_directory) then
    FileUtils.mkdir_p(default_directory)
    @stdout.puts "Created #{default_directory}"
    @stdout.puts "heel's PID (#{pid_file}) and log file (#{log_file}) are stored here"
  end
end

#start_thin_server ⇒ Object 



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# File 'lib/heel/server.rb', line 253

def start_thin_server
  server = thin_server

  server_thread = Thread.new do
    begin
      if options.daemonize then
        if cpid = fork then
          # wait for the top child of the server double fork to exit
          Process.waitpid(cpid)
        else
          server.daemonize
          server.start
        end
      else
        begin
          server.start
        rescue RuntimeError 
          $stderr.puts "ERROR: Unable to start server.  Heel may already be running.  Please check running processes or run `heel --kill'"
          exit 1
        end
      end
    end
  end
end

#thin_server ⇒ Object 



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# File 'lib/heel/server.rb', line 219

def thin_server
  server = Thin::Server.new(options.address, options.port)

  # overload the name of the process so it shows up as heel not thin
  def server.name
    "heel (v#{Heel::VERSION})"
  end

  server.pid_file = pid_file
  server.log_file = log_file

  app = Heel::RackApp.new({ :document_root => options.document_root,
                            :highlighting  => options.highlighting})

  Heel::Logger.log_file = log_file
  server.app = Rack::Builder.new {
    use Heel::Logger
    map "/" do 
      run app
    end
    map "/heel_css" do 
      run Rack::File.new(Heel::Configuration.data_path( "css" )) 
    end
    map "/heel_icons" do
      run Rack::File.new(Heel::Configuration.data_path("famfamfam", "icons")) 
    end

  }
  
  server.app = Thin::Stats::Adapter.new(server.app, "/heel_stats")

  return server
end