(If
  (DBracket {B2 BINARY_STRING_EQUAL {[VarSub GET_HOSTS_FROM test_op=VS_TEST_COLON_HYPHEN {[LIT_CHARS dns]}]} {[DQ [LIT_CHARS env]]}})
  (Com {[LIT_CHARS redis-server]} {[LIT_CHARS --slaveof]} {[VarSub REDIS_MASTER_SERVICE_HOST]} {[LIT_CHARS 6379]}  )
  (ElseTrue)
  (Com {[LIT_CHARS redis-server]} {[LIT_CHARS --slaveof]} {[LIT_CHARS redis-master]} {[LIT_CHARS 6379]}  )
)