Class: Puppet::CatalogDiff::Differ

Inherits:
Object
  • Object
show all
Includes:
Comparer, Preprocessor
Defined in:
lib/puppet/catalog-diff/differ.rb

Overview

Differ allows to diff two catalogs

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(from, to) ⇒ Differ

Returns a new instance of Differ.



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# File 'lib/puppet/catalog-diff/differ.rb', line 22

def initialize(from, to)
  @from_file = from
  @to_file = to
end

Instance Attribute Details

#from_file ⇒ Object

Returns the value of attribute from_file.



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# File 'lib/puppet/catalog-diff/differ.rb', line 20

def from_file
  @from_file
end

#to_file ⇒ Object

Returns the value of attribute to_file.



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# File 'lib/puppet/catalog-diff/differ.rb', line 20

def to_file
  @to_file
end

Instance Method Details

#diff(options = {}) ⇒ Object 



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# File 'lib/puppet/catalog-diff/differ.rb', line 31

def diff(options = {})
  from = []
  from_meta = {}
  to = []
  to_meta = {}
  { from_file => [from, from_meta], to_file => [to, to_meta] }.each do |r, a|
    v, m = a
    raise "Cannot find resources in #{r}" unless File.exist?(r)

    case File.extname(r)
    when '.yaml'
      tmp = YAML.safe_load(File.read(r))
    when '.marshal'
      tmp = Marshal.load(File.read(r))
    when '.pson'
      tmp = PSON.parse(File.read(r))
      tmp = str_to_catalog(tmp) unless tmp.respond_to?(:version)
    when '.json'
      tmp = str_to_catalog(JSON.parse(File.read(r)))
    else
      raise 'Provide catalog with the appropriate file extension, valid extensions are json, pson, yaml and marshal'
    end

    m[:version] = tmp.version
    m[:environment] = tmp.environment

    convert25(tmp, v)
  end

  if options[:exclude_classes]
    [to, from].each do |c|
      c.reject! { |x| x[:type] == 'Class' }
    end
  end

  if options[:exclude_defined_resources]
    [to, from].each do |c|
      c.reject! { |x| x[:type].include?('::') }
    end
  end

  if options[:exclude_resource_types]
    types = options[:exclude_resource_types].split(',')
    [to, from].each do |c|
      c.reject! { |x| types.include?(x[:type]) }
    end
  end

  Puppet.debug("Processing: #{from_file}")
  titles = {}
  titles[:to] = extract_titles(to)
  titles[:from] = extract_titles(from)

  output = {}
  output[:old_version] = from_meta[:version].to_s
  output[:new_version] = to_meta[:version].to_s

  output[:old_environment] = from_meta[:environment]
  output[:new_environment] = to_meta[:environment]

  output[:total_resources_in_old] = titles[:from].size
  output[:total_resources_in_new] = titles[:to].size

  resource_diffs_titles = return_resource_diffs(titles[:from], titles[:to])
  output[:only_in_old] = resource_diffs_titles[:titles_only_in_old]
  output[:only_in_new] = resource_diffs_titles[:titles_only_in_new]

  resource_diffs = compare_resources(from, to, options)
  output[:differences_in_old]  = resource_diffs[:old]
  output[:differences_in_new]  = resource_diffs[:new]
  output[:differences_as_diff] = resource_diffs[:string_diffs]
  output[:params_in_old]       = resource_diffs[:old_params]
  output[:params_in_new]       = resource_diffs[:new_params]
  output[:content_differences] = resource_diffs[:content_differences]

  additions    = resource_diffs_titles[:titles_only_in_new].size
  subtractions = resource_diffs_titles[:titles_only_in_old].size
  changes      = resource_diffs[:new_params].keys.size

  changes_percentage      = ((titles[:from].size.zero? && 0) || (100 * (resource_diffs[:new_params].keys.size.to_f / titles[:from].size)))
  additions_percentage    = ((titles[:to].size.zero?   && 0) || (100 * (additions.to_f / titles[:to].size)))
  subtractions_percentage = ((titles[:from].size.zero? && 0) || (100 * (subtractions.to_f / titles[:from].size)))

  output[:catalag_percentage_added]   = '%.2f' % additions_percentage
  output[:catalog_percentage_removed] = '%.2f' % subtractions_percentage
  output[:catalog_percentage_changed] = '%.2f' % changes_percentage
  output[:added_and_removed_resources] = "#{(!additions.zero? && "+#{additions}") || 0} / #{(!subtractions.zero? && "-#{subtractions}") || 0}"

  divide_by = (changes_percentage.zero? ? 0 : 1) + (additions_percentage.zero? ? 0 : 1) + (subtractions_percentage.zero? ? 0 : 1)
  output[:node_percentage]       = ((divide_by.zero? && 0) || (additions_percentage == 100 && 100) || ((changes_percentage + additions_percentage + subtractions_percentage) / divide_by)).to_f
  output[:node_differences]      = (additions.abs.to_i + subtractions.abs.to_i + changes.abs.to_i)
  output
end

#str_to_catalog(str) ⇒ Object 



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# File 'lib/puppet/catalog-diff/differ.rb', line 27

def str_to_catalog(str)
  Puppet::Resource::Catalog.from_data_hash str
end