Class: Hx::Site

Inherits:
Object
  • Object
show all
Includes:
Filter
Defined in:
lib/hx.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Filter

#each_entry

Constructor Details

#initialize(options, sources, outputs) ⇒ Site

Returns a new instance of Site.



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# File 'lib/hx.rb', line 624

def initialize(options, sources, outputs)
  @options = options
  @sources = sources
  @output = Overlay.new(*outputs)
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/hx.rb', line 528

def options
  @options
end

#sources ⇒ Object (readonly)

Returns the value of attribute sources.



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# File 'lib/hx.rb', line 529

def sources
  @sources
end

Class Method Details

.load(io, config_file, option_overrides = {}) ⇒ Object 



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# File 'lib/hx.rb', line 540

def load(io, config_file, option_overrides={})
  raw_config = YAML.load(io)
  options = {}
  options[:base_dir] = File.dirname(config_file)
  for key, value in raw_config.fetch('options', {})
    options[key.intern] = value
  end
  options[:config_file] = config_file
  options.update(option_overrides)

  if raw_config.has_key? 'require'
    for library in raw_config['require']
      Hx.local_require(options, library)
    end
  end

  raw_sources_by_name = raw_config.fetch('sources', {})
  raw_outputs = raw_config.fetch('output', [])
  for name, raw_source in raw_sources_by_name
    raw_sources_by_name[name] = Hx.expand_chain(raw_source)
  end
  raw_outputs = raw_outputs.map! do |raw_output|
    Hx.expand_chain(raw_output)
  end

  # build input dependency graph
  source_dependencies = Hash.new { |h,k| h[k] = Set.new }
  source_count_by_dependency = Hash.new(0)
  for name, raw_source in raw_sources_by_name
    for input_name in Hx.get_input_names(raw_source)
      source_dependencies[name].add input_name
      source_count_by_dependency[input_name] += 1
    end
  end
  for raw_output in raw_outputs
    for input_name in Hx.get_input_names(raw_output)
      source_count_by_dependency[input_name] += 1
    end
  end

  source_names = raw_sources_by_name.keys

  # calculate depth for each input in the graph
  source_depths = Hash.new(0)
  to_process = Set.new(source_names)
  until to_process.empty?
    need_updating = Set.new
    for name in to_process
      depth = source_depths[name] + 1
      if depth > source_names.length
        raise "cycle in source graph involving #{name}"
      end
      for input_name in source_dependencies[name]
        if depth > source_depths[input_name]
          source_depths[input_name] = depth
          need_updating.add input_name
        end
      end
    end
    to_process = need_updating
  end

  # depth-first topological sort
  depth_first_names = source_names.sort_by { |n| -source_depths[n] }

  sources = {}
  for name in depth_first_names
    raw_source = raw_sources_by_name[name]
    source = Hx.build_source(options, NULL_INPUT, sources, raw_source)
    if source_count_by_dependency[name] > 1
      source = Cache.new(source, options)
    end
    sources[name] = source
  end

  outputs = []
  for raw_output in raw_outputs
    outputs << Hx.build_source(options, NULL_INPUT, sources, raw_output)
  end

  new(options, sources, outputs)
end

.load_file(config_file, option_overrides = {}) ⇒ Object 



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# File 'lib/hx.rb', line 534

def load_file(config_file, option_overrides={})
  File.open(config_file, 'r') do |stream|
    load(stream, config_file, option_overrides)
  end
end

Instance Method Details

#each_entry_path(selector) ⇒ Object 



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# File 'lib/hx.rb', line 635

def each_entry_path(selector)
  @output.each_entry_path(selector) { |path| yield path }
  self
end

#edit_entry(path, prototype = nil) ⇒ Object 



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# File 'lib/hx.rb', line 630

def edit_entry(path, prototype=nil)
  @output.edit_entry(path, prototype) { |text| yield text }
  self
end

#get_entry(path) ⇒ Object 



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# File 'lib/hx.rb', line 640

def get_entry(path)
  @output.get_entry(path)
end