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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 os |
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6 import json |
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7 import logging |
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8 from subprocess import Popen, PIPE |
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9 |
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10 from . import loggers |
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11 from .config import settings |
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12 |
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13 logger=loggers.get(__name__) |
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14 |
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15 necessary_opts=['--log-json', '--progress'] |
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16 |
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17 necessary_opts_for={ |
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18 'create': ['--json'], |
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19 'info': ['--json'], |
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20 'list': ['--json'], |
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21 } |
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22 |
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23 # Conversion of config into command line |
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24 def arglistify(args): |
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25 flatten=lambda l: [item for sublist in l for item in sublist] |
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26 if args is None: |
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27 return [] |
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28 else: |
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29 return flatten([['--' + key, str(d[key])] for d in args for key in d]) |
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30 |
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31 class BorgInstance: |
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32 def __init__(self, operation, archive_or_repository, |
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33 common_params, op_params, paths): |
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34 self.operation=operation; |
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35 self.archive_or_repository=archive_or_repository; |
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36 self.common_params=common_params |
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37 self.op_params=op_params |
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38 self.paths=paths |
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39 |
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40 def construct_cmdline(self): |
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41 cmd=([settings['borg']['executable']]+necessary_opts+ |
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42 arglistify(self.common_params)+ |
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43 [self.operation]) |
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44 |
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45 if self.operation in necessary_opts_for: |
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46 cmd=cmd+necessary_opts_for[self.operation] |
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47 |
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48 return (cmd+arglistify(self.op_params) |
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49 +[self.archive_or_repository]+self.paths) |
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50 |
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51 def launch(self, passphrase=None): |
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52 cmd=self.construct_cmdline() |
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53 |
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54 logger.info('Launching ' + str(cmd)) |
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55 |
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56 # Set passphrase if not, or set to empty if not known, so borg |
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57 # won't hang waiting for it, which seems to happen even if we |
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58 # close stdin. |
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59 env=os.environ.copy() |
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60 env['BORG_PASSPHRASE']=passphrase or '' |
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61 |
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62 # Workaround: if launched is a standalone app created with py2app, |
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63 # borg will fail unless Python environment is reset. |
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64 # TODO: Of course, this will fail if the system needs the variables |
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65 # PYTHONPATH or PYTHONHOME set to certain values. |
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66 if '_PY2APP_LAUNCHED_' in env: |
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67 val=env['_PY2APP_LAUNCHED_'] |
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68 if val=='1': |
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69 del env['PYTHONPATH'] |
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70 del env['PYTHONHOME'] |
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71 |
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72 self.proc=Popen(cmd, env=env, stdout=PIPE, stderr=PIPE, stdin=PIPE) |
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73 |
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74 # We don't do passphrase input etc. |
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75 self.proc.stdin.close() |
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76 |
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77 def read_result(self): |
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78 stream=self.proc.stdout |
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79 line=stream.read(-1) |
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80 if line==b'': |
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81 logger.debug('Borg stdout pipe EOF?') |
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82 return None |
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83 |
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84 try: |
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85 return json.loads(line) |
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86 except Exception as err: |
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87 logger.warning('JSON parse failed on: "%s"' % line) |
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88 return None |
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89 |
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90 def read_log(self): |
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91 stream=self.proc.stderr |
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92 try: |
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93 line=stream.readline() |
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94 except err: |
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95 logger.debug('Pipe read failed: %s' % str(err)) |
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96 |
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97 return {'type': 'log_message', |
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98 'levelname': 'CRITICAL', |
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99 'name': 'borgend.instance.BorgInstance', |
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100 'msgid': 'Borgend.Exception', |
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101 'message': err} |
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102 |
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103 if line==b'': |
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104 |
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105 logger.debug('Borg stderr pipe EOF?') |
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106 |
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107 return None |
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108 |
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109 try: |
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110 res=json.loads(line) |
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111 if 'type' not in res: |
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112 res['type']='UNKNOWN' |
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113 return res |
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114 except: |
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115 logger.debug('JSON parse failed on: "%s"' % str(line)) |
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116 |
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117 errmsg=line |
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118 for line in iter(stream.readline, b''): |
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119 errmsg=errmsg+line |
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120 |
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121 return {'type': 'log_message', |
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122 'levelname': 'ERROR', |
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123 'name': 'borgend.instance.BorgInstance', |
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124 'msgid': 'Borgend.JSONFail', |
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125 'message': str(errmsg)} |
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126 |
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127 def terminate(self): |
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128 self.proc.terminate() |
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129 |
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130 def wait(self): |
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131 return self.proc.wait() is not None |
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132 |
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133 def has_terminated(self): |
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134 return self.proc.poll() is not None |
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135 |