57 lines
1.7 KiB
Ruby
57 lines
1.7 KiB
Ruby
# frozen_string_literal: true
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module RuboCop
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module Cop
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module Gitlab
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# This cop checks for usage of boolean operators in rule blocks, which
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# does not work because conditions are objects, not booleans.
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#
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# @example
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#
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# # bad, `conducts_electricity` returns a Rule object, not a boolean!
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# rule { conducts_electricity && batteries }.enable :light_bulb
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#
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# # good
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# rule { conducts_electricity & batteries }.enable :light_bulb
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#
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# @example
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#
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# # bad, `conducts_electricity` returns a Rule object, so the ternary is always going to be true
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# rule { conducts_electricity ? can?(:magnetize) : batteries }.enable :motor
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#
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# # good
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# rule { conducts_electricity & can?(:magnetize) }.enable :motor
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# rule { ~conducts_electricity & batteries }.enable :motor
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class PolicyRuleBoolean < RuboCop::Cop::Base
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def_node_search :has_and_operator?, <<~PATTERN
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(and ...)
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PATTERN
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def_node_search :has_or_operator?, <<~PATTERN
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(or ...)
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PATTERN
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def_node_search :has_if?, <<~PATTERN
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(if ...)
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PATTERN
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def on_block(node)
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return unless node.method_name == :rule
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if has_and_operator?(node)
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add_offense(node, message: '&& is not allowed within a rule block. Did you mean to use `&`?')
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end
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if has_or_operator?(node)
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add_offense(node, message: '|| is not allowed within a rule block. Did you mean to use `|`?')
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end
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if has_if?(node)
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add_offense(node, message: 'if and ternary operators are not allowed within a rule block.')
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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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