Module: Xcodeproj::Differ

Defined in:
lib/kintsugi/xcodeproj_extensions.rb

Class Method Summary collapse

Class Method Details

.array_diff(value_1, value_2, options) ⇒ Object

Replaces the implementation of array_diff with an implementation that takes into account the number of occurrences an element is found in the array. Code was mostly copied from github.com/CocoaPods/Xcodeproj/blob/51fb78a03f31614103815ce21c56dc25c044a10d/lib/xcodeproj/differ.rb#L111



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# File 'lib/kintsugi/xcodeproj_extensions.rb', line 123

def self.array_diff(value_1, value_2, options)
  ensure_class(value_1, Array)
  ensure_class(value_2, Array)
  return nil if value_1 == value_2

  new_objects_value_1 = array_non_unique_diff(value_1, value_2)
  new_objects_value_2 = array_non_unique_diff(value_2, value_1)
  return nil if value_1.empty? && value_2.empty?

  matched_diff = {}
  if id_key = options[:id_key]
    matched_value_1 = []
    matched_value_2 = []
    new_objects_value_1.each do |entry_value_1|
      if entry_value_1.is_a?(Hash)
        id_value = entry_value_1[id_key]
        entry_value_2 = new_objects_value_2.find do |entry|
          entry[id_key] == id_value
        end
        if entry_value_2
          matched_value_1 << entry_value_1
          matched_value_2 << entry_value_2
          diff = diff(entry_value_1, entry_value_2, options)
          matched_diff[id_value] = diff if diff
        end
      end
    end

    new_objects_value_1 -= matched_value_1
    new_objects_value_2 -= matched_value_2
  end

  if new_objects_value_1.empty? && new_objects_value_2.empty?
    if matched_diff.empty?
      nil
    else
      matched_diff
    end
  else
    result = {}
    result[options[:key_1]] = new_objects_value_1 unless new_objects_value_1.empty?
    result[options[:key_2]] = new_objects_value_2 unless new_objects_value_2.empty?
    result[:diff] = matched_diff unless matched_diff.empty?
    result
  end
end

.array_non_unique_diff(value_1, value_2) ⇒ Array

Returns the difference between two arrays, taking into account the number of occurrences an element is found in both arrays.

Parameters:

  • value_1 (Array) —

    First array to the difference operation.

  • value_2 (Array) —

    Second array to the difference operation.

Returns:



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# File 'lib/kintsugi/xcodeproj_extensions.rb', line 180

def self.array_non_unique_diff(value_1, value_2)
  value_2_elements_by_count = value_2.reduce({}) do |hash, element|
    updated_element_hash = hash.key?(element) ? {element => hash[element] + 1} : {element => 1}
    hash.merge(updated_element_hash)
  end

  value_1_elements_by_deletions =
    value_1.to_set.map do |element|
      times_to_delete_element = value_2_elements_by_count[element] || 0
      [element, times_to_delete_element]
    end.to_h

  value_1.select do |element|
    if value_1_elements_by_deletions[element].positive?
      value_1_elements_by_deletions[element] -= 1
      next false
    end
    next true
  end
end