1import collections, re 2import common 3from autotest_lib.client.common_lib import log 4 5 6statuses = log.job_statuses 7 8 9def is_worse_than(lhs, rhs): 10 """ Compare two statuses and return a boolean indicating if the LHS status 11 is worse than the RHS status.""" 12 return (statuses.index(lhs) < statuses.index(rhs)) 13 14 15def is_worse_than_or_equal_to(lhs, rhs): 16 """ Compare two statuses and return a boolean indicating if the LHS status 17 is worse than or equal to the RHS status.""" 18 if lhs == rhs: 19 return True 20 return is_worse_than(lhs, rhs) 21 22 23DEFAULT_BLACKLIST = ('\r\x00',) 24def clean_raw_line(raw_line, blacklist=DEFAULT_BLACKLIST): 25 """Strip blacklisted characters from raw_line.""" 26 return re.sub('|'.join(blacklist), '', raw_line) 27 28 29class status_stack(object): 30 def __init__(self): 31 self.status_stack = [statuses[-1]] 32 33 34 def current_status(self): 35 return self.status_stack[-1] 36 37 38 def update(self, new_status): 39 if new_status not in statuses: 40 return 41 if is_worse_than(new_status, self.current_status()): 42 self.status_stack[-1] = new_status 43 44 45 def start(self): 46 self.status_stack.append(statuses[-1]) 47 48 49 def end(self): 50 result = self.status_stack.pop() 51 if len(self.status_stack) == 0: 52 self.status_stack.append(statuses[-1]) 53 return result 54 55 56 def size(self): 57 return len(self.status_stack) - 1 58 59 60class line_buffer(object): 61 def __init__(self): 62 self.buffer = collections.deque() 63 64 65 def get(self): 66 return self.buffer.pop() 67 68 69 def put(self, line): 70 self.buffer.appendleft(line) 71 72 73 def put_multiple(self, lines): 74 self.buffer.extendleft(lines) 75 76 77 def put_back(self, line): 78 self.buffer.append(line) 79 80 81 def size(self): 82 return len(self.buffer) 83