Method: YARD::Templates::Helpers::MarkupHelper#load_markup_provider

Defined in:
lib/yard/templates/helpers/markup_helper.rb

#load_markup_provider(type = options.markup) ⇒ Boolean

Attempts to load the first valid markup provider in MARKUP_PROVIDERS. If a provider is specified, immediately try to load it.

On success this sets ‘@markup_provider` and `@markup_class` to the provider name and library constant class/module respectively for the loaded provider.

On failure this method will inform the user that no provider could be found and exit the program.

Returns:

  • (Boolean) —

    whether the markup provider was successfully loaded.


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# File 'lib/yard/templates/helpers/markup_helper.rb', line 76

def load_markup_provider(type = options.markup)
  return true if MarkupHelper.markup_cache[type]
  MarkupHelper.markup_cache[type] ||= {}

  providers = MARKUP_PROVIDERS[type.to_sym]
  return true if providers && providers.empty?
  if providers && options.markup_provider
    providers = providers.select {|p| p[:lib] == options.markup_provider }
  end

  if providers == nil || providers.empty?
    log.error "Invalid markup type '#{type}' or markup provider " +
      "(#{options.markup_provider}) is not registered."
    return false
  end

  # Search for provider, return the library class name as const if found
  providers.each do |provider|
    begin require provider[:lib].to_s; rescue LoadError; next end if provider[:lib]
    begin klass = eval("::" + provider[:const]); rescue NameError; next end
    MarkupHelper.markup_cache[type][:provider] = provider[:lib] # Cache the provider
    MarkupHelper.markup_cache[type][:class] = klass
    return true
  end

  # Show error message telling user to install first potential provider
  name, lib = *[providers.first[:const], providers.first[:lib] || type]
  log.error "Missing '#{lib}' gem for #{type.to_s.capitalize} formatting. Install it with `gem install #{lib}`"
  false
end