Class: Opal::Processor

Inherits:
TiltTemplate show all
Defined in:
opal/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::Processor

Constant Summary

@@cache_key =
nil

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from TiltTemplate

compiler_options, #compiler_options, engine_initialized?, inherited, #initialize_engine, #prepare, version

Class Method Details

.cache_keyObject


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# File 'opal/lib/opal/sprockets/processor.rb', line 16

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

.reset_cache_key!Object


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# File 'opal/lib/opal/sprockets/processor.rb', line 20

def self.reset_cache_key!
  @@cache_key = nil
end

.sprockets_extnames_regexp(sprockets) ⇒ Object


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# File 'opal/lib/opal/sprockets/processor.rb', line 59

def self.sprockets_extnames_regexp(sprockets)
  joined_extnames = (['.js']+sprockets.engines.keys).map { |ext| Regexp.escape(ext) }.join('|')
  Regexp.new("(#{joined_extnames})*$")
end

.stub_file(name) ⇒ Object

Deprecated.

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# File 'opal/lib/opal/sprockets/processor.rb', line 128

def self.stub_file(name)
  warn "DEPRECATION WARNING: `::Opal::Processor.stub_file' is deprecated, use `::Opal::Config.stubbed_files << #{name.inspect}.to_s' instead"
  ::Opal::Config.stubbed_files << name.to_s
end

.stubbed_filesObject

Deprecated.

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# File 'opal/lib/opal/sprockets/processor.rb', line 122

def self.stubbed_files
  warn "DEPRECATION WARNING: `::Opal::Processor.stubbed_files' is deprecated, use `::Opal::Config.stubbed_files' instead"
  ::Opal::Config.stubbed_files
end

Instance Method Details

#evaluate(context, locals, &block) ⇒ Object


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# File 'opal/lib/opal/sprockets/processor.rb', line 24

def evaluate(context, locals, &block)
  return super unless context.is_a? ::Sprockets::Context

  @sprockets = sprockets = context.environment

  # In Sprockets 3 logical_path has an odd behavior when the filename is "index"
  # thus we need to bake our own logical_path
  filename = context.respond_to?(:filename) ? context.filename : context.pathname.to_s
  root_path_regexp = Regexp.escape(context.root_path)
  logical_path = filename.gsub(%r{^#{root_path_regexp}/?(.*?)#{sprockets_extnames_regexp}}, '\1')

  compiler_options = self.compiler_options.merge(file: logical_path)

  # Opal will be loaded immediately to as the runtime redefines some crucial
  # methods such that need to be implemented as soon as possible:
  #
  # E.g. It forwards .toString() to .$to_s() for Opal objects including Array.
  #      If .$to_s() is not implemented and some other lib is loaded before
  #      corelib/* .toString results in an `undefined is not a function` error.
  compiler_options.merge!(requirable: false) if logical_path == 'opal'

  compiler = 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_contents = compiler.source_map.as_json.to_json
    ::Opal::SourceMapServer.set_map_cache(sprockets, logical_path, map_contents)
  end

  result.to_s
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 'opal/lib/opal/sprockets/processor.rb', line 78

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(file).gsub(/#{Regexp.escape File.dirname(context.logical_path)}#{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(file, '..', 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(file))
    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

      if name.to_s == file  then next
      elsif path.directory? then context.depend_on(path.to_s)
      else context.require_asset(pathname)
      end
    end
  end
end

#process_requires(requires, context) ⇒ Object


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# File 'opal/lib/opal/sprockets/processor.rb', line 68

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_regexpObject


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# File 'opal/lib/opal/sprockets/processor.rb', line 64

def sprockets_extnames_regexp
  @sprockets_extnames_regexp ||= self.class.sprockets_extnames_regexp(@sprockets)
end