instance.py

Sun, 21 Jan 2018 01:14:06 +0000

author
Tuomo Valkonen <tuomov@iki.fi>
date
Sun, 21 Jan 2018 01:14:06 +0000
changeset 22
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parent 21
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child 23
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permissions
-rw-r--r--

py2app standalone app generation

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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 import os
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8 from subprocess import Popen, PIPE
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9 from config import settings, arglistify
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11 necessary_opts=['--log-json', '--progress']
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13 necessary_opts_for={
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14 'create': ['--json'],
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15 'info': ['--json'],
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16 'list': ['--json'],
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17 }
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18
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19 class BorgInstance:
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20 def __init__(self, operation, archive_or_repository, args, argsl):
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21 self.operation=operation;
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22 self.args=args;
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23 self.archive_or_repository=archive_or_repository;
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24 self.argsl=argsl;
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26 def construct_cmdline(self):
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27 cmd=([settings['borg']['executable']]+necessary_opts+
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28 arglistify(settings['borg']['common_parameters'])+
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29 [self.operation])
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30 tmp1=self.operation+'_parameters'
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31 if tmp1 in settings['borg']:
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32 cmd=cmd+arglistify(settings['borg'][tmp1])
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33
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34 if self.operation in necessary_opts_for:
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35 cmd=cmd+necessary_opts_for[self.operation]
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37 return cmd+arglistify(self.args)+[self.archive_or_repository]+self.argsl
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39 def launch(self, passphrase=None):
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40 cmd=self.construct_cmdline()
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41
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42 logging.info('Launching ' + str(cmd))
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43
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44 env=None
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45 if passphrase:
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46 env=os.environ.copy()
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47 env['BORG_PASSPHRASE']=passphrase
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49 self.proc=Popen(cmd, env=env, stdout=PIPE, stderr=PIPE, stdin=PIPE)
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50
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51 # We don't do passphrase input etc.
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52 self.proc.stdin.close()
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53
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54 def read_result(self):
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55 stream=self.proc.stdout
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56 line=stream.read(-1)
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57 if line==b'':
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58 logging.debug('Borg stdout pipe EOF?')
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59 return None
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60
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61 try:
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62 return json.loads(line)
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63 except:
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64 logging.warning('JSON parse failed on: "%s"' % line)
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65 return None
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66
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67 def read_log(self):
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68 stream=self.proc.stderr
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69 try:
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70 line=stream.readline()
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71 except err:
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72 logging.debug('Pipe read failed: %s' % str(err))
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74 return {'type': 'log_message',
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75 'levelname': 'CRITICAL',
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76 'name': 'borgend.instance.BorgInstance',
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77 'msgid': 'Borgend.Exception',
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78 'message': err}
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80 if line==b'':
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81
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82 logging.debug('Borg stderr pipe EOF?')
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84 return None
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86 try:
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87 res=json.loads(line)
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88 if 'type' not in res:
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89 res['type']='UNKNOWN'
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90 return res
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91 except:
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92 logging.debug('JSON parse failed on: "%s"' % line)
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94 errmsg=line
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95 for line in iter(stream.readline, b''):
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96 errmsg=errmsg+line
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97
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98 return {'type': 'log_message',
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99 'levelname': 'ERROR',
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100 'name': 'borgend.instance.BorgInstance',
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101 'msgid': 'Borgend.JSONFail',
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102 'message': str(errmsg)}
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103
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104 def terminate(self):
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105 self.proc.terminate()
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106
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107 def wait(self):
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108 return self.proc.wait() is not None
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109
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110 def has_terminated(self):
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111 return self.proc.poll() is not None
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112

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