instance.py

#
# Borgend borg launcher / processor
#

import json
from subprocess import Popen, PIPE
from config import settings, arglistify

class BorgInstance:

    def __init__(self, operation, archive_or_repository, args, argsl):
        self.operation=operation;
        self.args=args;
        self.archive_or_repository=archive_or_repository;
        self.argsl=argsl;

    def construct_cmdline(self):
        cmd=([settings['borg']['executable'], '--log-json']+
             arglistify(settings['borg']['common_parameters'])+
             [self.operation])
        tmp1=self.operation+'_parameters'
        if tmp1 in settings['borg']:
            cmd=cmd+arglistify(settings['borg'][tmp1])
        cmd=cmd+arglistify(self.args)+[self.archive_or_repository]+self.argsl
        print(cmd)
        return cmd

    def launch(self):
        # What to do with stderr? Is it needed?
        self.proc=Popen(self.construct_cmdline(), stdout=PIPE, stderr=PIPE)

    def read(self):
        line=self.proc.stdout.readline()
        if line==b'':
            line=self.proc.stderr.readline()
            if line==b'':
                return None
            print('EEE'+str(line))
            return 'error'
        else:
            print('###' + str(line))
            # # What to do on error? stderr?
            status=json.loads(line)
            return status

    # for line in iter(stream.readline, b''):
    #     status=json.loads(line)
    #     queue.put({'identifier': instance.identifier,
    #                'operation': instance.operation,
    #                'status': status})
    # out.close()

    # def read_output():
    #     try:
    #         obj=self.queue.get_nowait()
    #     except Empty:
    #         obj=Empty
    #     return obj