Class: Haml::Exec::Sass

Inherits:
Generic show all
Defined in:
lib/haml/exec.rb

Overview

The sass executable.

Constant Summary

Constants inherited from Generic

Generic::COLORS

Instance Method Summary collapse

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



172
173
174
175
176
177
# 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.



260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
# 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)


184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
# 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