catstodon/bin/webpack-dev-server

#!/usr/bin/env ruby
$stdout.sync = true

require "shellwords"
require "yaml"

ENV["RAILS_ENV"] ||= "development"
RAILS_ENV = ENV["RAILS_ENV"]

ENV["NODE_ENV"] ||= RAILS_ENV
NODE_ENV = ENV["NODE_ENV"]

APP_PATH          = File.expand_path("../", __dir__)
CONFIG_FILE       = File.join(APP_PATH, "config/webpacker.yml")
NODE_MODULES_PATH = File.join(APP_PATH, "node_modules")
WEBPACK_CONFIG    = File.join(APP_PATH, "config/webpack/development.js")

def args(key)
  index = ARGV.index(key)
  index ? ARGV[index + 1] : nil
end

begin
  dev_server = YAML.load_file(CONFIG_FILE)["development"]["dev_server"]

  DEV_SERVER_HOST = "http#{"s" if args('--https') || dev_server["https"]}://#{args('--host') || dev_server["host"]}:#{args('--port') || dev_server["port"]}"

rescue Errno::ENOENT, NoMethodError
  puts "Webpack dev_server configuration not found in #{CONFIG_FILE}."
  puts "Please run bundle exec rails webpacker:install to install webpacker"
  exit!
end

newenv = {
  "NODE_PATH" => NODE_MODULES_PATH.shellescape,
  "ASSET_HOST" => DEV_SERVER_HOST.shellescape
}.freeze

cmdline = ["yarn", "run", "webpack-dev-server", "--", "--progress", "--color", "--config", WEBPACK_CONFIG] + ARGV

Dir.chdir(APP_PATH) do
  exec newenv, *cmdline
end