36 lines
906 B
Ruby
36 lines
906 B
Ruby
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# typed: true
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# frozen_string_literal: true
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module RuboCop
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module Cop
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module Homebrew
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# This cop restricts usage of IO.read functions for security reasons.
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#
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# @api private
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class IORead < Base
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MSG = "The use of `IO.%<method>s` is a security risk."
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RESTRICT_ON_SEND = [:read, :readlines].freeze
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def on_send(node)
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return if node.receiver != s(:const, nil, :IO)
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return if safe?(node.arguments.first)
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add_offense(node, message: format(MSG, method: node.method_name))
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end
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private
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def safe?(node)
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if node.str_type?
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!node.str_content.empty? && !node.str_content.start_with?("|")
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elsif node.dstr_type? || (node.send_type? && node.method?(:+))
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safe?(node.children.first)
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else
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false
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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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end
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