Chef helper win_friendly_path

default.rb

# Notice how log_dir starts with the correct two slashes? 
# By the time it is inserted into the template, one of those slashes is removed. 
# Trying to use win_friendly_path to undo that
default['iis']['log_dir']    = 'F:\\LogFiles'

output.txt

  ================================================================================
  Recipe Compile Error in c:/chef/cache/cookbooks/nd-web/recipes/default.rb
  ================================================================================

  NoMethodError
  -------------
  undefined method `win_friendly_path' for Chef::Resource::Template

  Cookbook Trace:
  ---------------
    c:/chef/cache/cookbooks/nd-web/recipes/config_files.rb:138:in `block in from_file'
    c:/chef/cache/cookbooks/nd-web/recipes/config_files.rb:135:in `from_file'
    c:/chef/cache/cookbooks/nd-web/recipes/default.rb:29:in `from_file'

  Relevant File Content:
  ----------------------
  c:/chef/cache/cookbooks/nd-web/recipes/config_files.rb:

recipe.rb

::Chef::Recipe.send(:include, Windows::Helper)

template "foo.json" do
  source 'foo.json.erb'
  variables(
    :log_dir  => win_friendly_path( node['iis']['log_dir'] )
  )
  action :create
end

https://www.chef.io/blog/2014/03/12/writing-libraries-in-chef-cookbooks/
http://dougireton.com/blog/2012/12/16/how-to-include-the-windows-cookbook-helper-methods-in-your-chef-recipe/

It appears that you can't call helper methods inside of the variables function.

Splitting it out fixes the error, but still doesn't give a windows safe path.

::Chef::Recipe.send(:include, Windows::Helper)
log_dir = win_friendly_path( node['iis']['log_dir'] )

template "foo.json" do
  source 'foo.json.erb'
  variables(
    :log_dir  => log_dir
  )
  action :create
end

No error, but the path is still

F:\foo\bar

Not

F:\\foo\\bar