haml_sass.rake

# Dan Croak, February 2008
# updated by Dan Dofter, February 2010

VIEWS_DIR = "#{RAILS_ROOT}/app/views"
CSS_DIR   = "#{RAILS_ROOT}/public/stylesheets"
SASS_DIR  = "#{VIEWS_DIR}/stylesheets"

def convert_css_to_sass(css_file)
  if css_file =~ /^(.*)(\.css)$/
    basename = $1
    system "css2sass #{CSS_DIR}/#{css_file} > #{SASS_DIR}/#{basename}.sass"
  end
end

def convert_sass_to_css(sass_file)
  if sass_file =~ /^(.*)(\.sass)$/
    basename = $1
    options = ""
    options += "-t #{Sass::Plugin.options[:style]}"  if Sass::Plugin.options[:style]
    options += " -l"  if Sass::Plugin.options[:line_comments]
    system "sass #{options} #{SASS_DIR}/#{sass_file} > #{CSS_DIR}/#{basename}.css"
  end
end

def convert_html_to_haml(erb_file, options = {})
  if erb_file =~ /^(.*)(\.html\.erb|\.rhtml)$/
    basename = $1
    system "html2haml #{VIEWS_DIR}/#{erb_file} > #{VIEWS_DIR}/#{basename}.html.haml"
    system "rm #{VIEWS_DIR}/#{erb_file}"  unless options[:keep_original]
  end
end

namespace :sass do

  # Usage:
  # rake sass:css2sass
  # rake sass:css2sass[mystyles.css]
  desc "Convert CSS files to Sass."
  task :css2sass, :css_file, :needs => [:environment] do |t, args|
    FileUtils.mkdir_p SASS_DIR

    files = if args.css_file
      [ args.css_file.strip ]
    else
      Dir.chdir(CSS_DIR)
      Dir.glob("**/*.css")
    end

    files.each do |filename|
      convert_css_to_sass filename
    end

    FileUtils.rm_rf('.sass-cache')
  end

  # Usage:
  # rake sass:sass2css
  # rake sass:sass2css[mystyles.sass]
  desc "Convert Sass files to CSS."
  task :sass2css, :sass_file, :needs => [:environment] do |t, args|
    FileUtils.mkdir_p CSS_DIR

    files = if args.sass_file
      [ args.sass_file.strip ]
    else
      Dir.chdir(SASS_DIR)
      Dir.glob("**/*.sass")
    end

    files.each do |filename|
      convert_sass_to_css filename
    end

    FileUtils.rm_rf('.sass-cache')
  end
end

namespace :haml do

  # Usage:
  # rake haml:html2haml
  # rake haml:html2haml[layouts/application.html.erb]
  # rake "haml:html2haml[layouts/application.html.erb, true]"
  desc "Convert HTML files to Haml."
  task :html2haml, :html_file, :keep_original, :needs => [:environment] do |t, args|
    keep_original = (args.keep_original == "true")

    files = if args.html_file
      [ args.html_file.strip ]
    else
      Dir.chdir(VIEWS_DIR)
      Dir.glob("**/*.html.erb") + Dir.glob("**/*.rhtml")
    end

    files.each do |filename|
      convert_html_to_haml filename, :keep_original => keep_original
    end
  end
end