25 lines
848 B
Ruby
25 lines
848 B
Ruby
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# frozen_string_literal: true
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module Gitlab
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module Utils
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class Nokogiri
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class << self
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# Use Nokogiri to convert a css selector into an xpath selector.
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# Nokogiri can use css selectors with `doc.search()`. However
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# for large node trees, it is _much_ slower than using xpath,
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# by several orders of magnitude.
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# https://gitlab.com/gitlab-org/gitlab/-/issues/329186
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def css_to_xpath(css)
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xpath = ::Nokogiri::CSS.xpath_for(css)
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# Due to https://github.com/sparklemotion/nokogiri/issues/572,
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# we remove the leading `//` and add `descendant-or-self::`
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# in order to ensure we're searching from this node and all
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# descendants.
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xpath.map { |t| "descendant-or-self::#{t[2..-1]}" }.join('|')
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end
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end
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end
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end
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end
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