Module: MCollective::Util::Playbook::TemplateUtil

Included in:
MCollective::Util::Playbook, Tasks, MCollective::Util::Playbook::Tasks::Base
Defined in:
lib/mcollective/util/playbook/template_util.rb

Instance Method Summary collapse

Instance Method Details

#__template_process_string(string) ⇒ Object 



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# File 'lib/mcollective/util/playbook/template_util.rb', line 61

def __template_process_string(string)
  raise("Playbook is not accessible") unless @playbook

  front = '{{2,3}\s*'
  back = '\s*}{2,3}'

  data_regex = Regexp.new("%s%s%s" % [front, '(?<type>input(s*)|metadata|nodes)\.(?<item>[a-zA-Z0-9\_\-]+)', back])
  date_regex = Regexp.new("%s%s%s" % [front, '(?<type>date|utc_date)\(\s*["\']*(?<format>.+?)["\']*\s*\)', back])
  task_regex = Regexp.new("%s%s%s" % [front, '(?<type>previous_task)\.(?<item>(success|description|msg|message|data|runtime))', back])
  singles_regex = Regexp.new("%s%s%s" % [front, "(?<type>uuid|elapsed_time)", back])

  combined_regex = Regexp.union(data_regex, date_regex, task_regex, singles_regex)

  if req = (string.match(/^#{data_regex}$/) || string.match(/^#{task_regex}$/))
    __template_resolve(req["type"], req["item"])
  elsif req = string.match(/^#{date_regex}$/)
    __template_resolve(req["type"], req["format"])
  elsif req = string.match(/^#{singles_regex}$/)
    __template_resolve(req["type"], "")
  else
    string.gsub(/#{combined_regex}/) do |part|
      value = __template_process_string(part)

      case value
      when Array
        value.join(", ")
      when Hash
        value.to_json
      else
        value
      end
    end
  end
end

#__template_resolve(type, item) ⇒ Object 



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# File 'lib/mcollective/util/playbook/template_util.rb', line 36

def __template_resolve(type, item)
  Log.debug("Resolving template data for %s.%s" % [type, item])

  case type
  when "input", "inputs"
    @playbook.input_value(item)
  when "nodes"
    @playbook.discovered_nodes(item)
  when "metadata"
    @playbook.metadata_item(item)
  when "previous_task"
    @playbook.previous_task(item)
  when "date"
    Time.now.strftime(item)
  when "utc_date"
    Time.now.utc.strftime(item)
  when "elapsed_time"
    @playbook.report.elapsed_time
  when "uuid"
    SSL.uuid
  else
    raise("Do not know how to process data of type %s" % type)
  end
end

#t(data) ⇒ Object

Recursively parse a data structure seeking strings that might contain templates

Template strings look like ‘MCollective::Util::Playbook::TemplateUtil.{{scope{{scope.key}}` where scope is one of `input`, `metadata`, `nodes` and the key is some item contained in those scopes like a named node list.

You’ll generally mix this into a class you wish to use it in, that class should have a ‘@playbook` variable set which is an instance of `Playbook`

Parameters:

  • data (Object) —

    data structure to traverse

Returns:

  • (Object) —

    deep cloned copy of the structure with strings parsed



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# File 'lib/mcollective/util/playbook/template_util.rb', line 15

def t(data)
  data = Marshal.load(Marshal.dump(data))

  case data
  when String
    __template_process_string(data)
  when Hash
    data.each do |k, v|
      data[k] = t(v)
    end

    data
  when Array
    data.map do |v|
      t(v)
    end
  else
    data
  end
end