Class: Nanoc::Filters::Less Private

Inherits:
Nanoc::Filter show all
Defined in:
lib/nanoc/filters/less.rb

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Constant Summary

Constants inherited from Nanoc::Filter

Nanoc::Filter::TMP_BINARY_ITEMS_DIR

Instance Attribute Summary

Attributes inherited from Nanoc::Filter

#assigns

Instance Method Summary collapse

Methods inherited from Nanoc::Filter

#depend_on, #filename, from_binary?, #initialize, #output_filename, requires, setup, #setup_and_run, to_binary?, type

Methods included from Int::PluginRegistry::PluginMethods

#all, #identifier, #identifiers, #named, #register

Methods inherited from Int::Context

#get_binding, #initialize

Constructor Details

This class inherits a constructor from Nanoc::Filter

Instance Method Details

#run(content, params = {}) ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Runs the content through [LESS](lesscss.org/). This method takes no options.

Parameters:

  • content (String) —

    The content to filter

Returns:

  • (String) —

    The filtered content



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# File 'lib/nanoc/filters/less.rb', line 12

def run(content, params = {})
  # Find imports (hacky)
  imports = []
  imports.concat(content.scan(/^@import\s+(["'])([^\1]+?)\1;/))
  imports.concat(content.scan(/^@import\s+url\((["']?)([^)]+?)\1\);/))
  imported_filenames = imports.map do |i|
    i[1] =~ /\.(less|css)$/ ? i[1] : i[1] + '.less'
  end

  # Convert to items
  imported_items = imported_filenames.map do |filename|
    # Find directory for this item
    current_dir_pathname = Pathname.new(@item[:content_filename]).dirname.realpath

    # Find absolute pathname for imported item
    imported_pathname    = Pathname.new(filename)
    if imported_pathname.relative?
      imported_pathname = current_dir_pathname + imported_pathname
    end
    next unless imported_pathname.exist?
    imported_filename = imported_pathname.realpath

    # Find matching item
    @items.find do |i|
      next if i[:content_filename].nil?
      Pathname.new(i[:content_filename]).realpath == imported_filename
    end
  end.compact

  # Create dependencies
  depend_on(imported_items)

  # Add filename to load path
  paths = [File.dirname(@item[:content_filename])]
  parser = ::Less::Parser.new(paths: paths)
  parser.parse(content).to_css params
end