Class: Opal::Sprockets::Processor

Inherits:
Object
  • Object
show all
Defined in:
lib/opal/sprockets/processor.rb

Overview

Internal: The Processor class is used to make ruby files (with .rb or .opal

extensions) available to any sprockets based server. Processor will then
get passed any ruby source file to build.

Direct Known Subclasses

ERB

Defined Under Namespace

Modules: PlainJavaScriptLoader

Constant Summary collapse

@@cache_key = 
nil

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input) ⇒ Processor

Returns a new instance of Processor.



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# File 'lib/opal/sprockets/processor.rb', line 38

def initialize(input)
  @input = input
  @sprockets = input[:environment]
  @context = sprockets.context_class.new(input)
  @data = input[:data]
end

Instance Attribute Details

#context ⇒ Object (readonly)

Returns the value of attribute context.



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# File 'lib/opal/sprockets/processor.rb', line 45

def context
  @context
end

#data ⇒ Object (readonly)

Returns the value of attribute data.



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# File 'lib/opal/sprockets/processor.rb', line 45

def data
  @data
end

#input ⇒ Object (readonly)

Returns the value of attribute input.



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# File 'lib/opal/sprockets/processor.rb', line 45

def input
  @input
end

#sprockets ⇒ Object (readonly)

Returns the value of attribute sprockets.



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# File 'lib/opal/sprockets/processor.rb', line 45

def sprockets
  @sprockets
end

Class Method Details

.cache_key ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 13

def self.cache_key
  @@cache_key ||= ['Opal', Opal::VERSION, Opal::Config.config].to_json.freeze
end

.call(input) ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 21

def self.call(input)
  data, map, dependencies, required = input[:cache].fetch([self.cache_key, input[:filename], input[:data]]) do
    new(input).call
  end

  if map
    map = ::Sprockets::SourceMapUtils.combine_source_maps(input[:metadata][:map], map)
  end

  {
    data: data,
    map: map,
    dependencies: input[:metadata][:dependencies].to_a + dependencies.to_a,
    required: input[:metadata][:required].to_a + required.to_a,
  }
end

.reset_cache_key! ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 17

def self.reset_cache_key!
  @@cache_key = nil
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 53

def call
  compiler_options = Opal::Config.compiler_options.merge(requirable: true, file: logical_path)

  compiler = Opal::Compiler.new(data, compiler_options)
  result = compiler.compile

  process_requires(compiler.requires, context)
  process_required_trees(compiler.required_trees, context)

  if Opal::Config.source_map_enabled
    map = compiler.source_map.as_json.transform_keys!(&:to_s)
    map["sources"][0] = input[:filename]
    map = ::Sprockets::SourceMapUtils.format_source_map(map, input)
  end

  [result.to_s, map , context.metadata[:dependencies], context.metadata[:required]]
end

#logical_path ⇒ Object

In Sprockets 3 logical_path has an odd behavior when the filename is “index” thus we need to bake our own logical_path



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# File 'lib/opal/sprockets/processor.rb', line 49

def logical_path
  @logical_path ||= context.filename.gsub(%r{^#{Regexp.escape(context.root_path)}/?(.*?)}, '\1')
end

#process_required_trees(required_trees, context) ⇒ Object

Internal: Add files required with ‘require_tree` as asset dependencies.

Mimics (v2) Sprockets::DirectiveProcessor#process_require_tree_directive



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# File 'lib/opal/sprockets/processor.rb', line 85

def process_required_trees(required_trees, context)
  return if required_trees.empty?

  # This is the root dir of the logical path, we need this because
  # the compiler gives us the path relative to the file's logical path.
  dirname = File.dirname(input[:filename]).gsub(/#{Regexp.escape File.dirname(context.logical_path)}#{Opal::REGEXP_END}/, '')
  dirname = Pathname(dirname)

  required_trees.each do |original_required_tree|
    required_tree = Pathname(original_required_tree)

    unless required_tree.relative?
      raise ArgumentError, "require_tree argument must be a relative path: #{required_tree.inspect}"
    end

    required_tree = dirname.join(input[:filename], '..', required_tree)

    unless required_tree.directory?
      raise ArgumentError, "require_tree argument must be a directory: #{{source: original_required_tree, pathname: required_tree}.inspect}"
    end

    context.depend_on required_tree.to_s

    environment = context.environment

    processor = ::Sprockets::DirectiveProcessor.new
    processor.instance_variable_set('@dirname', File.dirname(input[:filename]))
    processor.instance_variable_set('@environment', environment)
    path = processor.__send__(:expand_relative_dirname, :require_tree, original_required_tree)
    absolute_paths = environment.__send__(:stat_sorted_tree_with_dependencies, path).first.map(&:first)

    absolute_paths.each do |path|
      path = Pathname(path)
      pathname = path.relative_path_from(dirname).to_s
      pathname_noext = pathname.sub(sprockets_extnames_regexp, '')

      if path.to_s == logical_path then next
      elsif ::Opal::Config.stubbed_files.include?(pathname_noext) then next
      elsif path.directory? then context.depend_on(path.to_s)
      else context.require_asset(pathname_noext)
      end
    end
  end
end

#process_requires(requires, context) ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 75

def process_requires(requires, context)
  requires.each do |required|
    required = required.to_s.sub(sprockets_extnames_regexp, '')
    context.require_asset required unless ::Opal::Config.stubbed_files.include? required
  end
end

#sprockets_extnames_regexp ⇒ Object 



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# File 'lib/opal/sprockets/processor.rb', line 71

def sprockets_extnames_regexp
  @sprockets_extnames_regexp ||= Opal::Sprockets.sprockets_extnames_regexp(@sprockets)
end