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# frozen_string_literal: true
module Gitlab
module Ci
module Pipeline
module Expression
module Lexeme
require_dependency 're2'
class Pattern < Lexeme::Value
PATTERN = %r{^/.+/[ismU]*$}.freeze
NEW_PATTERN = %r{^\/([^\/]|\\/)+[^\\]\/[ismU]*}.freeze
def initialize(regexp)
@value = self.class.eager_matching_with_escape_characters? ? regexp.gsub(/\\\//, '/') : regexp
unless Gitlab::UntrustedRegexp::RubySyntax.valid?(@value)
raise Lexer::SyntaxError, 'Invalid regular expression!'
end
end
def evaluate(variables = {})
Gitlab::UntrustedRegexp::RubySyntax.fabricate!(@value)
rescue RegexpError
raise Expression::RuntimeError, 'Invalid regular expression!'
end
def self.pattern
eager_matching_with_escape_characters? ? NEW_PATTERN : PATTERN
end
def self.build(string)
new(string)
end
def self.eager_matching_with_escape_characters?
Feature.enabled?(:ci_variables_complex_expressions, default_enabled: true)
end
end
end
end
end
end
end
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