class Webpacker::DevServerRunner

Constants

UNSUPPORTED_SWITCHES

Public Instance Methods

run() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 9
def run
  load_config
  detect_unsupported_switches!
  detect_port!
  execute_cmd
end

Private Instance Methods

detect_port!() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 56
def detect_port!
  server = TCPServer.new(@hostname, @port)
  server.close

rescue Errno::EADDRINUSE
  $stdout.puts "Another program is running on port #{@port}. Set a new port in #{@config.config_path} for dev_server"
  exit!
end
detect_unsupported_switches!() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 43
def detect_unsupported_switches!
  unsupported_switches = UNSUPPORTED_SWITCHES & @argv
  if unsupported_switches.any?
    $stdout.puts "The following CLI switches are not supported by Webpacker: #{unsupported_switches.join(' ')}. Please edit your command and try again."
    exit!
  end

  if @argv.include?("--https") && !@https
    $stdout.puts "Please set https: true in webpacker.yml to use the --https command line flag."
    exit!
  end
end
execute_cmd() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 65
def execute_cmd
  env = Webpacker::Compiler.env
  env["WEBPACKER_CONFIG"] = @webpacker_config
  env["WEBPACK_SERVE"] = "true"

  cmd = if node_modules_bin_exist?
    ["#{@node_modules_bin_path}/webpack", "serve"]
  else
    ["yarn", "webpack", "serve"]
  end

  if @argv.include?("--debug-webpacker")
    cmd = [ "node", "--inspect-brk", "--trace-warnings" ] + cmd
    @argv.delete "--debug-webpacker"
  end

  cmd += ["--config", @webpack_config]
  cmd += ["--progress", "--color"] if @pretty

  cmd += ["--hot"] if @hot
  cmd += @argv

  Dir.chdir(@app_path) do
    Kernel.exec env, *cmd
  end
end
load_config() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 18
def load_config
  app_root = Pathname.new(@app_path)

  @config = Configuration.new(
    root_path: app_root,
    config_path: Pathname.new(@webpacker_config),
    env: ENV["RAILS_ENV"]
  )

  dev_server = DevServer.new(@config)

  @hostname          = dev_server.host
  @port              = dev_server.port
  @pretty            = dev_server.pretty?
  @https             = dev_server.https?
  @hot               = dev_server.hmr?

rescue Errno::ENOENT, NoMethodError
  $stdout.puts "webpack dev_server configuration not found in #{@config.config_path}[#{ENV["RAILS_ENV"]}]."
  $stdout.puts "Please run bundle exec rails webpacker:install to install Webpacker"
  exit!
end
node_modules_bin_exist?() click to toggle source
# File lib/webpacker/dev_server_runner.rb, line 92
def node_modules_bin_exist?
  File.exist?("#{@node_modules_bin_path}/webpack-dev-server")
end