class SvelteOnRails::DevelopmentUtils

def self.contributor_config(key, required: true)
  config_file = File.expand_path('../svelte_on_rails_contributor_configs.yml', gem_folder)
  if !File.exist?(config_file)
    if required
      raise "Missing configuration file, searched at: «#{config_file}»"
    end
  else
    yml = YAML.load_file(config_file)
    value = yml[key.to_s]
    if required && !value.present?
      raise "Missing value «#{key}» in configuration file: «#{config_file}»"
    end
    value
  end
end

def self.gem_folder
  Pathname.new(File.expand_path('../../..', __dir__))
end

def self.local_npm_package_url
  str = contributor_config('local_npm_package_path', required: false)
  if !str.present?
    nil
  elsif !Dir.exist?(str)
    raise "Invalid path given on local_npm_package_path: «#{str}»"
  elsif !File.exist?(Pathname.new(str).join('package.json'))
    raise "Given local_npm_package_path does not seem to be a valid npm package as it does not contain a package.json"
  else
    return Pathname.new(str)
  end
end