Module: Twm

Defined in:
lib/r2-oas/lib/three-way-merge/twm.rb

Overview

rubocop:disable all

Class Method Summary collapse

Class Method Details

.yaml_merge(left, orig, right) ⇒ Object

orig: local docs left: generate docs right: local src files

condition: merge right into left



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# File 'lib/r2-oas/lib/three-way-merge/twm.rb', line 14

def yaml_merge(left, orig, right)
  flat_orig = KeyFlatten.key_flatten(orig || {}).to_h
  flat_left = KeyFlatten.key_flatten(left || {}).to_h
  flat_right = KeyFlatten.key_flatten(right || {}).to_h

  all_keys = (flat_left.keys + flat_orig.keys + flat_right.keys).uniq

  twm = all_keys.each_with_object({}) do |key, result|
    r = three_equal?(flat_left[key], flat_orig[key], flat_right[key])

    if r[:left_orig] && r[:orig_right] && r[:left_right]
      # no change
      result[key] = flat_orig[key]
    elsif r[:left_orig] && !r[:orig_right] && !r[:left_right]
      # edited
      result[key] = flat_right[key]
    elsif !r[:left_orig] && r[:orig_right] && !r[:left_right]
      # generate
      result[key] = flat_left[key]
    elsif !r[:left_orig] && !r[:orig_right] && r[:left_right]
      # edited
      result[key] = flat_right[key]
    elsif !r[:left_orig] && !r[:orig_right] && !r[:left_right]
      # conflict => prioritize edited
      result[key] = flat_right[key]
    end
  end

  twm = twm.delete_if { |_k, v| v.nil? }
  KeyFlatten.key_unflatten(twm)
end