Class: Less::Command

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

Instance Attribute Summary collapse

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 5

def initialize options
  $verbose = options[:debug]
  @source = options[:source]
  @destination = (options[:destination] || options[:source]).gsub /\.(less|lss)/, '.css'
  @options = options
end

Instance Attribute Details

#destination ⇒ Object

Returns the value of attribute destination.



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

def destination
  @destination
end

#options ⇒ Object

Returns the value of attribute options.



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

def options
  @options
end

#source ⇒ Object

Returns the value of attribute source.



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

def source
  @source
end

Instance Method Details

#compress? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/less/command.rb', line 13

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

#debug? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/less/command.rb', line 14

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

#err(s = '', type = '') ⇒ Object 



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# File 'lib/less/command.rb', line 85

def err s = '', type = ''
  type = type.strip + ' ' unless type.empty?
  print "! [#{type}Error] #{s}"
end

#log(s = '') ⇒ Object

Just a logging function to avoid typing ‘*’



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# File 'lib/less/command.rb', line 81

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

#parse(new = false) ⇒ Object 



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# File 'lib/less/command.rb', line 53

def parse new = false
  begin
    # Create a new Less object with the contents of a file
    css = Less::Engine.new(File.new @source).to_css
    css = css.delete " \n" if compress?

    File.open( @destination, "w" ) do |file|
      file.write css
    end
    print "#{new ? '* [Created]' : '* [Updated]'} #{@destination.split('/').last}\n: " if watch?
  rescue Errno::ENOENT => e
    abort "#{e}"
  rescue SyntaxError => e
    err "#{e}\n", "Parse"
  rescue MixedUnitsError => e
    err "`#{e}` you're  mixing units together! What do you expect?\n"
  rescue PathError => e
    err "`#{e}` was not found.\n", "Path"
  rescue VariableNameError => e
    err "`#{e}` is undefined.\n", "Name"
  rescue MixinNameError => e
    err "`#{e}` is undefined.\n", "Name"
  else
    true
  end
end

#run! ⇒ Object 



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# File 'lib/less/command.rb', line 27

def run!
  parse(true) unless File.exist? @destination

  if watch?
    log "Watching for changes in #@source... Ctrl-C to abort.\n: "

    # Main watch loop
    loop do
      watch { sleep 1 }

      # File has changed
      if File.stat( @source ).mtime > File.stat( @destination ).mtime
        print "Change detected... "

        # Loop until error is fixed
        until parse
          log "Press [return] to continue..."
          watch { $stdin.gets }
        end
      end
    end
  else
    parse
  end
end

#watch ⇒ Object

little function which allows us to Ctrl-C exit inside the passed block



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# File 'lib/less/command.rb', line 18

def watch
  begin
    yield
  rescue Interrupt
    puts
    exit 0
  end
end

#watch? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/less/command.rb', line 12

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