Class: Less::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/less/command.rb

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Command

Returns a new instance of Command.



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# File 'lib/less/command.rb', line 3

def initialize options
  @source, @destination = options[:source], options[:destination]
  @options = options
end

Instance Method Details

#compile ⇒ Object 



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# File 'lib/less/command.rb', line 57

def compile
  begin
    # Create a new Less object with the contents of a file
    css = Less::Engine.new( File.read( @source ) ).to_css
    css = css.delete " \n" if compress?
    File.open( @destination, "w" ) do |file|
      file.write css
    end
    puts "#{@destination.split('/').last} was updated!" if watch?
  rescue Errno::ENOENT => e
    abort "#{e}"
  end
end

#compress? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/less/command.rb', line 8

def compress?() @options[:compress] end

#log(s = '') ⇒ Object

Just a logging function to avoid typing ‘}’



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# File 'lib/less/command.rb', line 72

def log s = ''
  print '} ' + s.to_s
end

#run! ⇒ Object 



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# File 'lib/less/command.rb', line 10

def run!
  # little function which allows us to Ctrl-C exit inside the passed block
  watch = lambda do |&block|
    begin
      block.call
    rescue Interrupt
      puts
      exit 0
    end
  end

  if watch?
    log "Watching for changes in #@source ...Ctrl-C to abort.\n"
    #
    # Main watch loop
    #
    loop do
      watch.call { sleep 1 }
      
      # File has changed
      if File.stat( @source ).mtime > File.stat( @destination ).mtime
        log "Change detected... "
        #
        # Error loop
        #
        loop do
          begin
            compile
          rescue SyntaxError
            error = $!.message.split("\n")[1..-1].collect {|e| e.gsub(/\(eval\)\:\d+\:\s/, '') } * "\n"
            log " errors were found in the .less file! \n#{error}\n"
            log "Press [enter] to continue..."
            watch.call do
              $stdin.gets
              print "} "
            end
            next # continue within the error loop, until the error is fixed
          end
          break # break to main loop, as no errors were encountered
        end
      end # if
    end # loop
  else
    compile
  end
end

#watch? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/less/command.rb', line 7

def watch?() @options[:watch] end