Sass (Ruby CSS compressor) absolute path parameters on Windows

Question

I'm using sass (from haml-edge) for processing css files, and it crashes on absolute paths as parameters:

K:\sass>sass.bat k:/sass/css/*.scss k:/sass/css/*.css --trace
d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/files.rb:23:in `read': No such file or directory - k
 (Errno::ENOENT)
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/files.rb:23:in `tree_for'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/plugin.rb:220:in `update_stylesheet'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/plugin.rb:71:in `block in update_stylesheets'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/plugin.rb:71:in `each'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/sass/plugin.rb:71:in `update_stylesheets'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/haml/exec.rb:433:in `watch_or_update'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/haml/exec.rb:349:in `process_result'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/haml/exec.rb:41:in `parse'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/lib/haml/exec.rb:21:in `parse!'
    from d:/Programs/Ruby/lib/ruby/gems/1.9.1/gems/haml-edge-3.1.62/bin/sass:8:in `<top (required)>'
    from d:/Programs/Ruby/bin/sass:19:in `load'
    from d:/Programs/Ruby/bin/sass:19:in `<main>'

I was able to make it work by commenting one condition in split_colon_path (Ruby\lib\ruby\gems\1.9.1\gems\haml-edge-3.1.62\lib\haml\exec.rb):

def split_colon_path(path)
  one, two = path.split(':', 2)
  if one && two && #### this part was commented #  ::Haml::Util.windows? &&
      one =~ /\A[A-Za-z]\Z/ && two =~ /\A[\/\\]/
    # If we're on Windows and we were passed a drive letter path,
    # don't split on that colon.
    one2, two = two.split(':', 2)
    one = one + ':' + one2
  end
  return one, two
end

Is there a better solution for platform detection?

Answer 1

This is a known bug. It's fixed in the latest stable version of Sass, unless you're using mingw Ruby, in which case it'll be fixed in the next stable version (to be released this weekend).

Answer 2

Problem solved in haml-edge 3.1.64.

For the record, mingw was added to the host_os possible values in {Ruby folder}\lib\ruby\gems\1.9.1\gems\haml-edge-3.1.64\lib\haml\util.rb:

# Whether or not this is running on Windows.
#
# @return [Boolean]
def windows?
  RbConfig::CONFIG['host_os'] =~ /mswin|windows|mingw/i
end