Class: Chef::Provider::Template

Inherits:
File show all
Includes:
Mixin::Checksum, Mixin::FindPreferredFile, Mixin::Template
Defined in:
lib/chef/provider/template.rb

Instance Attribute Summary

Attributes inherited from Chef::Provider

#current_resource, #new_resource, #node

Instance Method Summary collapse

Methods included from Mixin::FindPreferredFile

#find_preferred_file, #load_cookbook_files

Methods included from Mixin::Template

#render_template

Methods included from Mixin::Checksum

#checksum

Methods inherited from File

#action_delete, #action_touch, #backup, #compare_group, #compare_mode, #compare_owner, #generate_url, #load_current_resource, #set_group, #set_mode, #set_owner

Methods included from Mixin::GenerateURL

#generate_cookbook_url

Methods inherited from Chef::Provider

#action_nothing, build_from_file, #initialize, #load_current_resource

Methods included from Mixin::ConvertToClassName

#convert_to_class_name, #filename_to_qualified_string

Methods included from Mixin::RecipeDefinitionDSLCore

#method_missing

Constructor Details

This class inherits a constructor from Chef::Provider

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class Chef::Mixin::RecipeDefinitionDSLCore

Instance Method Details

#action_create ⇒ Object 



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# File 'lib/chef/provider/template.rb', line 36

def action_create
  Chef::Log.debug(@node.run_state.inspect)
  raw_template_file = nil
  
  cookbook_name = @new_resource.cookbook || @new_resource.cookbook_name
  
  Chef::Log.debug("looking for template #{@new_resource.source} in cookbook #{cookbook_name.inspect}")
  
  cache_file_name = "cookbooks/#{cookbook_name}/templates/default/#{@new_resource.source}"
  template_cache_name = "#{cookbook_name}_#{@new_resource.source}"
  
  if Chef::Config[:solo]
    filename = find_preferred_file(
      cookbook_name,
      :template,
      @new_resource.source,
      @node[:fqdn],
      @node[:platform],
      @node[:platform_version]
    )
    Chef::Log.debug("Using local file for template:#{filename}")
    cache_file_name = Pathname.new(filename).relative_path_from(Pathname.new(Chef::Config[:file_cache_path])).to_s
  elsif @node.run_state[:template_cache].has_key?(template_cache_name)
    Chef::Log.debug("I have already fetched the template for #{@new_resource} once this run, not checking again.")
    template_updated = false
  else
    r = Chef::REST.new(Chef::Config[:template_url])
    
    current_checksum = nil
    
    if Chef::FileCache.has_key?(cache_file_name)
      current_checksum = self.checksum(Chef::FileCache.load(cache_file_name, false))
    else
      Chef::Log.debug("Template #{@new_resource} is not in the template cache")
    end
    
    template_url = generate_url(
      @new_resource.source, 
      "templates",
      {
        :checksum => current_checksum
      }
    )
    
    template_updated = true
    begin
      raw_template_file = r.get_rest(template_url, true)
    rescue Net::HTTPRetriableError => e
      if e.response.kind_of?(Net::HTTPNotModified)
        template_updated = false
        Chef::Log.debug("Cached template for #{@new_resource} is unchanged")
      else
        raise e
      end
    end
    
    # We have checked the cache for this template this run
    @node.run_state[:template_cache][template_cache_name] = true
  end  
  
  if template_updated
    Chef::Log.debug("Updating template for #{@new_resource} in the cache")
    Chef::FileCache.move_to(raw_template_file.path, cache_file_name)
  end

  context = {}
  context.merge!(@new_resource.variables)
  context[:node] = @node
  template_file = render_template(Chef::FileCache.load(cache_file_name), context)

  update = false

  if ::File.exists?(@new_resource.path)
    @new_resource.checksum(self.checksum(template_file.path))
    if @new_resource.checksum != @current_resource.checksum
      Chef::Log.debug("#{@new_resource} changed from #{@current_resource.checksum} to #{@new_resource.checksum}")
      Chef::Log.info("Updating #{@new_resource} at #{@new_resource.path}")
      update = true
    end
  else
    Chef::Log.info("Creating #{@new_resource} at #{@new_resource.path}")
    update = true
  end

  if update
    backup
    FileUtils.cp(template_file.path, @new_resource.path)
    @new_resource.updated = true
  else
    Chef::Log.debug("#{@new_resource} is unchanged")
  end
        
  set_owner if @new_resource.owner != nil
  set_group if @new_resource.group != nil
  set_mode if @new_resource.mode != nil
end

#action_create_if_missing ⇒ Object 



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# File 'lib/chef/provider/template.rb', line 133

def action_create_if_missing
  if ::File.exists?(@new_resource.path)
    Chef::Log.debug("Template #{@new_resource} exists, taking no action.")
  else
    action_create
  end
end