Is it possible to "watch" Haml files in Compass (a tool for creating styles)?

Question

Compass is currently browsing files .scssinside the src folder and automatically updating cs files. (typing compass watch myproject).

Is there a way to include haml files in the "browsing process"?

(I could not install StaticMatic because I do not want to install Ruby1.8).

Answer 1

First, you must use RVM. Installing any version of Ruby becomes painless.

Secondly, I just wrote this for myself, using the same "fssm" that Compass uses to view files. Add this to your / create Rakefile:

require 'rubygems'
require 'fssm'
require 'haml'

class HamlWatcher
  class << self
    def watch
      refresh
      puts ">>> HamlWatcher is watching for changes. Press Ctrl-C to Stop."
      FSSM.monitor('haml', '**/*.haml') do
        update do |base, relative|
          puts ">>> Change detected to: #{relative}"
          HamlWatcher.compile(relative)
        end
        create do |base, relative|
          puts ">>> File created: #{relative}"
          HamlWatcher.compile(relative)
        end
        delete do |base, relative|
          puts ">>> File deleted: #{relative}"
          HamlWatcher.remove(relative)
        end
      end
    end

    def output_file(filename)
      # './haml' retains the base directory structure
      filename.gsub(/\.html\.haml$/,'.html')
    end

    def remove(file)
      output = output_file(file)
      File.delete output
      puts "\033[0;31m   remove\033[0m #{output}"
    end

    def compile(file)
      output_file_name = output_file(file)
      origin = File.open(File.join('haml', file)).read
      result = Haml::Engine.new(origin).render
      raise "Nothing rendered!" if result.empty?
      # Write rendered HTML to file
      color, action = File.exist?(output_file_name) ? [33, 'overwrite'] : [32, '   create']
      puts "\033[0;#{color}m#{action}\033[0m #{output_file_name}"
      File.open(output_file_name,'w') {|f| f.write(result)}
    end

    # Check that all haml templates have been rendered.
    def refresh
      Dir.glob('haml/**/*.haml').each do |file|
        file.gsub!(/^haml\//, '')
        compile(file) unless File.exist?(output_file(file))
      end
    end
  end
end


namespace :haml do
  desc "Watch the site HAML templates and recompile them when they change"
  task :watch do
    require File.join(File.dirname(__FILE__), 'lib', 'haml_watcher')
    HamlWatcher.watch
  end
end

rake haml:watch