Class: NREPL::Server

Inherits:
Object
  • Object
show all
Defined in:
lib/nrepl-lazuli/server.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(port: DEFAULT_PORT, host: DEFAULT_HOST, debug: false, binding: nil, pwd: Dir.pwd, tracing: true, loader: nil) ⇒ Server

Returns a new instance of Server.



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# File 'lib/nrepl-lazuli/server.rb', line 34

def initialize(
  port: DEFAULT_PORT,
  host: DEFAULT_HOST,
  debug: false,
  binding: nil,
  pwd: Dir.pwd,
  tracing: true,
  loader: nil
)
  @port  = port
  $pwd = pwd
  @host  = host
  @debug = debug
  @connections = Set.new
  @binding = binding
  loc = caller_locations.reject { |x| x.absolute_path =~ /nrepl\-lazuli/ }[0]
  loc = caller_locations[0] if(!loc)
  path = loc.absolute_path
  line = loc.lineno - 1
  @bindings = {path => {line => {"NREPL::Server.start" => binding}}}
  @bindings_by_id = {
    "NREPL::Server.start" => {
      binding: binding,
      file: path,
      row: line
    }
  }
  @tracing = tracing
  @loader = loader
  Thread.current[:nrepl_server] = self
  NREPL.class_variable_set(:@@connections, @connections)
  NREPL.class_variable_set(:@@bindings, @bindings)
  NREPL.class_variable_set(:@@bindings_by_id, @bindings_by_id)
end

Instance Attribute Details

#call_trace ⇒ Object (readonly)

Returns the value of attribute call_trace.



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# File 'lib/nrepl-lazuli/server.rb', line 15

def call_trace
  @call_trace
end

#debug ⇒ Object (readonly) Also known as: debug?

Returns the value of attribute debug.



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# File 'lib/nrepl-lazuli/server.rb', line 15

def debug
  @debug
end

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/nrepl-lazuli/server.rb', line 15

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/nrepl-lazuli/server.rb', line 15

def port
  @port
end

Class Method Details

.bind!(binding, **kwargs) ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 30

def self.bind!(binding, **kwargs)
  new(**kwargs.merge(binding: binding)).start
end

.spawn(args = {}) ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 18

def self.spawn(args = {})
  t = Thread.new {
    new(**args).start
  }
  sleep 0.1
  t[:nrepl_server]
end

.start(**kwargs) ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 26

def self.start(**kwargs)
  new(**kwargs).start
end

Instance Method Details

#auto_create_bindings! ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 111

def auto_create_bindings!
  dir_regex = Regexp.new("^#{Regexp.escape($pwd)}")
  trace_proc = proc do |tp|
    path = tp.path
    next if tp.path =~ /^(\<|.eval)/
    path = File.join($pwd, path) if File.dirname(path) == '.'
    id = "#{path}:#{tp.lineno}"
    b = tp.binding
    @bindings_by_id[id] = {binding: b, file: path, row: tp.lineno-1}
    @bindings[path] ||= {}
    @bindings[path][tp.lineno-1] ||= {}
    @bindings[path][tp.lineno-1][id] = b
    path
  end
  @class_trace = TracePoint.new(:class, &trace_proc)
  @class_trace.enable

  @call_trace = TracePoint.new(:call) do |tp|
    path = trace_proc.call(tp)
    if path =~ dir_regex
      @connections.each do |connection|
        connection.send_msg(
          'op' => 'hit_auto_watch',
          'file' => path,
          'line' => tp.lineno-1,
          'status' => ['done']
        )
      end
    end
  end
  @call_trace.enable if @tracing

  if @loader
    need_to_pause = true
    original_trace = nil
    @loader.on_load do
      next unless need_to_pause
      need_to_pause = false
      original_trace = call_trace.enabled?
      @call_trace.disable
      Thread.new do
        sleep 5
        @call_trace.enable if original_trace
        need_to_pause = true
      end
    end
  end

  @ex_trace = TracePoint.new(:raise) do |tp|
    e = tp.raised_exception
    @@last_exception = [:error, e.inspect.sub(/\>$/, ' stack=' + e.backtrace.inspect+'>')]
  end
  @ex_trace.enable
end

#start ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 75

def start
  puts "nREPL server started on port #{port} on host #{host} - nrepl://#{host}:#{port}"
  puts "Running in debug mode" if debug?
  record_port

  @old_out, @old_err = $stdout, $stderr
  $stdout = FakeStdout.new(@connections, STDOUT, "out")
  $stderr = FakeStdout.new(@connections, STDERR, "err")
  auto_create_bindings!

  Signal.trap("INT") { stop }
  Signal.trap("TERM") { stop }

  @socket = TCPServer.new(host, port)
  loop do
    break if @socket.closed?
    Thread.start(@socket.accept) do |client|
      connection = Connection.new(
        client,
        server: self,
        debug: @debug,
        binding: @binding,
        bindings_by_id: @bindings_by_id,
        bindings: @bindings
      )
      @connections << connection
      connection.treat_messages!
      @connections.delete(connection)
    end
  end
rescue IOError
  puts "Server closed" if debug?
ensure
  File.unlink(PORT_FILENAME)
end

#stop ⇒ Object 



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# File 'lib/nrepl-lazuli/server.rb', line 166

def stop
  @connections = []
  $stdout, $stderr = @old_out, @old_err
  @socket.close
end