Valentin Schneider | 0d3a022 | 2017-09-11 16:51:33 +0100 | [diff] [blame] | 1 | import os |
| 2 | import re |
| 3 | import shutil |
| 4 | |
| 5 | from devlib.trace import TraceCollector |
| 6 | from devlib.utils.android import LogcatMonitor |
| 7 | |
| 8 | class LogcatCollector(TraceCollector): |
| 9 | |
| 10 | def __init__(self, target, regexps=None): |
| 11 | super(LogcatCollector, self).__init__(target) |
| 12 | self.regexps = regexps |
| 13 | self._collecting = False |
| 14 | self._prev_log = None |
| 15 | |
| 16 | def reset(self): |
| 17 | """ |
| 18 | Clear Collector data but do not interrupt collection |
| 19 | """ |
| 20 | if not self._monitor: |
| 21 | return |
| 22 | |
| 23 | if self._collecting: |
| 24 | self._monitor.clear_log() |
| 25 | elif self._prev_log: |
| 26 | os.remove(self._prev_log) |
| 27 | self._prev_log = None |
| 28 | |
| 29 | def start(self): |
| 30 | """ |
| 31 | Start collecting logcat lines |
| 32 | """ |
| 33 | self._monitor = LogcatMonitor(self.target, self.regexps) |
| 34 | if self._prev_log: |
| 35 | # Append new data collection to previous collection |
| 36 | self._monitor.start(self._prev_log) |
| 37 | else: |
| 38 | self._monitor.start() |
| 39 | |
| 40 | self._collecting = True |
| 41 | |
| 42 | def stop(self): |
| 43 | """ |
| 44 | Stop collecting logcat lines |
| 45 | """ |
| 46 | if not self._collecting: |
| 47 | raise RuntimeError('Logcat monitor not running, nothing to stop') |
| 48 | |
| 49 | self._monitor.stop() |
| 50 | self._collecting = False |
| 51 | self._prev_log = self._monitor.logfile |
| 52 | |
| 53 | def get_trace(self, outfile): |
| 54 | """ |
| 55 | Output collected logcat lines to designated file |
| 56 | """ |
| 57 | # copy self._monitor.logfile to outfile |
| 58 | shutil.copy(self._monitor.logfile, outfile) |