79 lines
1.5 KiB
Ruby
79 lines
1.5 KiB
Ruby
# frozen_string_literal: true
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require 'objspace'
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module Gitlab
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module Utils
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class DeepSize
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Error = Class.new(StandardError)
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TooMuchDataError = Class.new(Error)
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DEFAULT_MAX_SIZE = 1.megabyte
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DEFAULT_MAX_DEPTH = 100
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def initialize(root, max_size: DEFAULT_MAX_SIZE, max_depth: DEFAULT_MAX_DEPTH)
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@root = root
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@max_size = max_size || DEFAULT_MAX_SIZE
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@max_depth = max_depth || DEFAULT_MAX_DEPTH
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@size = 0
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@depth = 0
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evaluate
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end
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def valid?
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!too_big? && !too_deep?
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end
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private
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def evaluate
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add_object(@root)
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rescue Error
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# NOOP
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end
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def too_big?
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@size > @max_size
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end
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def too_deep?
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@depth > @max_depth
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end
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def add_object(object)
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@size += ObjectSpace.memsize_of(object)
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raise TooMuchDataError if @size > @max_size
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add_array(object) if object.is_a?(Array)
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add_hash(object) if object.is_a?(Hash)
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end
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def add_array(object)
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with_nesting do
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object.each do |n|
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add_object(n)
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end
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end
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end
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def add_hash(object)
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with_nesting do
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object.each do |key, value|
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add_object(key)
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add_object(value)
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end
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end
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end
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def with_nesting
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@depth += 1
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raise TooMuchDataError if too_deep?
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yield
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@depth -= 1
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end
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end
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end
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end
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