lib/gitlab/ci/pipeline/expression/lexeme/pattern.rb


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module Gitlab
  module Ci
    module Pipeline
      module Expression
        module Lexeme
          require_dependency 're2'

          class Pattern < Lexeme::Value
            PATTERN = %r{^(?<regexp>/.+/[ismU]*)$}.freeze

            def initialize(regexp)
              @value = regexp
            end

            def evaluate(variables = {})
              Gitlab::UntrustedRegexp.fabricate(@value)
            rescue RegexpError
              raise Expression::RuntimeError, 'Invalid regular expression!'
            end

            def self.build(string)
              new(string.match(PATTERN)[:regexp])
            end
          end
        end
      end
    end
  end
end