instance.py

Sat, 20 Jan 2018 20:34:23 +0000

author
Tuomo Valkonen <tuomov@iki.fi>
date
Sat, 20 Jan 2018 20:34:23 +0000
changeset 11
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parent 10
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child 12
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permissions
-rw-r--r--

New tray title: B. or B! depending on activity

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1 #
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2 # Borgend borg launcher / processor
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3 #
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4
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5 import json
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6 import logging
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7 from subprocess import Popen, PIPE
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8 from config import settings, arglistify
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10 necessary_opts=['--log-json', '--progress']
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12 necessary_opts_for={
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13 'create': ['--json'],
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14 'info': ['--json'],
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15 'list': ['--json'],
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16 }
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17
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18 class BorgInstance:
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19 def __init__(self, operation, archive_or_repository, args, argsl):
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20 self.operation=operation;
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21 self.args=args;
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22 self.archive_or_repository=archive_or_repository;
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23 self.argsl=argsl;
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25 def construct_cmdline(self):
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26 cmd=([settings['borg']['executable']]+necessary_opts+
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27 arglistify(settings['borg']['common_parameters'])+
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28 [self.operation])
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29 tmp1=self.operation+'_parameters'
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30 if tmp1 in settings['borg']:
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31 cmd=cmd+arglistify(settings['borg'][tmp1])
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32
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33 if self.operation in necessary_opts_for:
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34 cmd=cmd+necessary_opts_for[self.operation]
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36 return cmd+arglistify(self.args)+[self.archive_or_repository]+self.argsl
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37
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38 def launch(self):
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39 cmd=self.construct_cmdline()
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40
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41 logging.info('Launching ' + str(cmd))
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42
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43 self.proc=Popen(cmd, stdout=PIPE, stderr=PIPE, stdin=None)
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44
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45 def read_result(self):
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46 stream=self.proc.stdout
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47 line=stream.read(-1)
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48 if line==b'':
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49 logging.debug('Borg stdout pipe EOF?')
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50 return None
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51
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52 try:
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53 return json.loads(line)
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54 except:
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55 logging.warning('JSON parse failed on: "%s"' % line)
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56 return None
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57
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58 def read_log(self):
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59 stream=self.proc.stderr
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60 try:
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61 line=stream.readline()
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62 except err:
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63 logging.debug('Pipe read failed: %s' % str(err))
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65 return {'type': 'exception', 'exception': err}
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66
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67 if line==b'':
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68
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69 logging.debug('Borg stderr pipe EOF?')
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71 return None
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73 try:
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74 res=json.loads(line)
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75 if 'type' not in res:
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76 res['type']='UNKNOWN'
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77 return res
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78 except:
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79 logging.debug('JSON parse failed on: "%s"' % line)
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81 errmsg=line
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82 for line in iter(stream.readline, b''):
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83 errmsg=errmsg+line
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85 return {'type': 'unparsed_error', 'message': str(errmsg)}
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87 def terminate(self):
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88 self.proc.terminate()
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89
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90 def wait(self):
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91 return self.proc.wait() is not None
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93 def has_terminated(self):
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94 return self.proc.poll() is not None
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95

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