102 lines
2.4 KiB
Python
Executable File
102 lines
2.4 KiB
Python
Executable File
#!/usr/bin/env python3
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from pprint import pprint
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import daemon
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import time
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import argparse
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import os
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import json
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from pyf import download, prt
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WORKDIR = os.getcwd()
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TMP = '/tmp/quickos.log'
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def init_parser():
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''' initialize the argument parser
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@return agrs: the parsed arguments
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'''
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parser = argparse.ArgumentParser(description='flash linux operating systems on the fly')
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parser.add_argument('os',
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default='arch',
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metavar='os',
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help='the operating system that should be flashed')
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parser.add_argument('storage',
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metavar='storage',
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help='the storage where the os shall be flashed')
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return parser.parse_args()
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def log(message):
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''' write to logfile TMP
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@param message: the message which shall be written to the log file
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'''
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with open(TMP, 'a') as f:
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f.write('{} {}\n'.format(time.ctime(), message))
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# algo check if new version should be downloaded
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# a: is image file there?
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# -> no: download image file
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# -> yes: goto b
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#
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# b: is the age of the file older than *today* - *interval*
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# -> no: break
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# -> yes: goto c
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#
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# c: is there a *testfile_sha256* sum?
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# -> no: download image file
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# -> yes: goto d
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#
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# d: download testfile
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# is sha256 sum of testfile and *testfile_sha256* equivalent?
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# -> no: download image file
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# -> yes: break
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def check_update(database):
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''' check if update is necessary '''
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from urllib.parse import urlparse
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from os import path
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for name, ops in database.items():
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prt('checking operating system {} ...'.format(name))
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if ops['file_name'] == '':
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file_name = urlparse(ops['file_url'])
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file_name = file_name.path
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file_name = path.basename(file_name)
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print(file_name)
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download(ops['file_url'], file_name)
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continue
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def read_os_database():
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''' read the os database.txt file
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@return a json object of the database
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'''
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with open('{}/database.txt'.format(WORKDIR), 'r') as f:
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return json.load(f)
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# https://stackoverflow.com/questions/4637420/efficient-python-daemon#8375012
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def run_daemon():
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''' run the daemon '''
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with daemon.DaemonContext():
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check_update()
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if __name__ == '__main__':
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args = init_parser()
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database = read_os_database()
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check_update(database)
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# run_daemon()
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