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.



3
4
5
6
 
# File 'lib/less/command.rb', line 3

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

Instance Method Details

#compile ⇒ Object 



57
58
59
60
61
62
63
64
65
66
67
68
69
 
# 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:



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

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

#log(s = '') ⇒ Object

Just a logging function to avoid typing ‘}’



72
73
74
 
# File 'lib/less/command.rb', line 72

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

#run! ⇒ Object 



20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
 
# File 'lib/less/command.rb', line 20

def run!
  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
        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 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(&block) ⇒ Object

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



11
12
13
14
15
16
17
18
 
# File 'lib/less/command.rb', line 11

def watch &block
  begin
    block.call
  rescue Interrupt
    puts
    exit 0
  end
end

#watch? ⇒ Boolean

Returns:



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

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