Class: Haml::Exec::Sass

Inherits:

Generic

• Object
• Generic
• Haml::Exec::Sass

Defined in:

lib/haml/exec.rb

Overview

The sass executable.

Constant Summary

Constants inherited from Generic

Generic::COLORS

Instance Method Summary

• #initialize(args) ⇒ Sass constructor

  A new instance of Sass.

• #process_result protected

  Processes the options set by the command-line arguments, and runs the Sass compiler appropriately.

• #set_opts(opts) protected

  Tells optparse how to parse the arguments.

Methods inherited from Generic

#color, #get_line, #parse, #parse!, #puts_action, #to_s

Constructor Details

#initialize(args) ⇒ Sass

Returns a new instance of Sass.

Parameters:

• args (Array<String>) —

  The command-line arguments

# File 'lib/haml/exec.rb', line 172

def initialize(args)
  super
  @options[:for_engine] = {
    :load_paths => ['.'] + (ENV['SASSPATH'] || '').split(File::PATH_SEPARATOR)
  }
end

Instance Method Details

#process_result (protected)

Processes the options set by the command-line arguments, and runs the Sass compiler appropriately.

# File 'lib/haml/exec.rb', line 260

def process_result
  require 'sass'

  if !@options[:update] && !@options[:watch] &&
      @args.first && colon_path?(@args.first)
    if @args.size == 1
      @args = split_colon_path(@args.first)
    else
      @options[:update] = true
    end
  end

  return interactive if @options[:interactive]
  return watch_or_update if @options[:watch] || @options[:update]
  super
  @options[:for_engine][:filename] = @options[:filename]

  begin
    input = @options[:input]
    output = @options[:output]

    @options[:for_engine][:syntax] ||= :scss if input.is_a?(File) && input.path =~ /\.scss$/
    engine =
      if input.is_a?(File) && !@options[:check_syntax]
        ::Sass::Engine.for_file(input.path, @options[:for_engine])
      else
        # We don't need to do any special handling of @options[:check_syntax] here,
        # because the Sass syntax checking happens alongside evaluation
        # and evaluation doesn't actually evaluate any code anyway.
        ::Sass::Engine.new(input.read(), @options[:for_engine])
      end

    input.close() if input.is_a?(File)

    output.write(engine.render)
    output.close() if output.is_a? File
  rescue ::Sass::SyntaxError => e
    raise e if @options[:trace]
    raise e.sass_backtrace_str("standard input")
  end
end

#set_opts(opts) (protected)

Tells optparse how to parse the arguments.

Parameters:

• opts (OptionParser)

# File 'lib/haml/exec.rb', line 184

def set_opts(opts)
  super

  opts.banner = <<END
Usage: sass [options] [INPUT] [OUTPUT]

Description:
  Converts SCSS or Sass files to CSS.

Options:
END

  opts.on('--scss',
          'Use the CSS-superset SCSS syntax.') do
    @options[:for_engine][:syntax] = :scss
  end
  opts.on('--watch', 'Watch files or directories for changes.',
                     'The location of the generated CSS can be set using a colon:',
                     '  sass --watch input.sass:output.css',
                     '  sass --watch input-dir:output-dir') do
    @options[:watch] = true
  end
  opts.on('--update', 'Compile files or directories to CSS.',
                      'Locations are set like --watch.') do
    @options[:update] = true
  end
  opts.on('--stop-on-error', 'If a file fails to compile, exit immediately.',
                             'Only meaningful for --watch and --update.') do
    @options[:stop_on_error] = true
  end
  opts.on('-c', '--check', "Just check syntax, don't evaluate.") do
    require 'stringio'
    @options[:check_syntax] = true
    @options[:output] = StringIO.new
  end
  opts.on('-t', '--style NAME',
          'Output style. Can be nested (default), compact, compressed, or expanded.') do |name|
    @options[:for_engine][:style] = name.to_sym
  end
  opts.on('-q', '--quiet', 'Silence warnings during compilation.') do
    @options[:for_engine][:quiet] = true
  end
  opts.on('-g', '--debug-info',
          'Emit extra information in the generated CSS that can be used by the FireSass Firebug plugin.') do
    @options[:for_engine][:debug_info] = true
  end
  opts.on('-l', '--line-numbers', '--line-comments',
          'Emit comments in the generated CSS indicating the corresponding sass line.') do
    @options[:for_engine][:line_numbers] = true
  end
  opts.on('-i', '--interactive',
          'Run an interactive SassScript shell.') do
    @options[:interactive] = true
  end
  opts.on('-I', '--load-path PATH', 'Add a sass import path.') do |path|
    @options[:for_engine][:load_paths] << path
  end
  opts.on('-r', '--require LIB', 'Require a Ruby library before running Sass.') do |lib|
    require lib
  end
  opts.on('--cache-location PATH', 'The path to put cached Sass files. Defaults to .sass-cache.') do |loc|
    @options[:for_engine][:cache_location] = loc
  end
  opts.on('-C', '--no-cache', "Don't cache to sassc files.") do
    @options[:for_engine][:cache] = false
  end

  unless ::Haml::Util.ruby1_8?
    opts.on('-E encoding', 'Specify the default encoding for Sass files.') do |encoding|
      Encoding.default_external = encoding
    end
  end
end