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# Usage: use the copy_and_backup_file() as a utility function for backing up a file.
#
# Purpose: the function copy_and_backup_file(src, dest_dir) copies file src to destination directory (if exists) and compress
# the copied file in the destination directory (to save space).
#
#
# Created on 7 December 2019 by Hui Lan (lanhui@zjnu.edu.cn)
import os, sys
from configure import UPDATE_NETWORK_LOG_FILE
from datetime import datetime
MINIMUM_SPACE_REQUIREMENT = 1 # Gigabytes
def write_log_file(s, fname):
if not os.path.exists(fname):
return None
f = open(fname, 'a')
curr_time = datetime.now().strftime('%Y-%m-%d %H:%M')
s = '[' + curr_time + ']: ' + s
if not '\n' in s:
s += '\n'
f.write(s)
f.close()
def make_paths(s):
if not os.path.isdir(s):
os.makedirs(s)
def disk_has_enough_space():
available_G = 4 * os.statvfs('/home').f_bavail / (1024*1024) # compute available space (in Gigabytes). Each block has 4k bytes, work for Linux/UNIX systems only
if available_G < MINIMUM_SPACE_REQUIREMENT:
print('[backup_files.py] home directory does not have enough space (only %4.1f G is available) ' % (available_G))
write_log_file('[backup_files.py] WARNING: home directory does not have enough space (only %4.1f G is available)! No backup is carried out.' % (available_G), UPDATE_NETWORK_LOG_FILE)
sys.exit()
def copy_and_backup_file(src_file, dest_dir):
disk_has_enough_space() # make sure we have enough space first
if not os.path.exists(src_file):
sys.exit()
make_paths(dest_dir) # if dest_dir does not exist, create it.
curr_date = datetime.now().strftime('%Y%m%d')
dest_file = os.path.join(dest_dir, os.path.basename(src_file) + '.' + curr_date)
cmd = 'cp %s %s && gzip -f %s' % (src_file, dest_file, dest_file)
os.system(cmd)
write_log_file('[backup_files.py] File %s has been backed up to %s and zipped (.gz)' % (src_file, dest_file), UPDATE_NETWORK_LOG_FILE)
## main
if __name__ == '__main__':
copy_and_backup_file('../Data/temp/edges.txt', '../Analysis')
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