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#!/usr/bin/env python
import os
import sys
import hashlib
import argparse
from collections import OrderedDict
EQ = '='
BLK_START = '{'
BLK_END = '}'
#name: {key: value, key: value}
def parse(filename):
blocks = OrderedDict()
blk = None
key = None
value = None
with open(filename) as f:
# read all lines
for line in f:
# if line has '=' sign treat it
# as split symbol
if EQ in line:
key, value = line.split(EQ, 1)
key = key.strip()
value = value.strip()
if value == BLK_START:
# value on the right of '=' is '{'
# so this opens new block
blk = key
blocks[key] = OrderedDict()
elif value == BLK_END:
# value on the right of '=' is '}'
# this terminates block
blk = None
else:
# key = value inside block
blocks[blk][key] = value
# return parsed structure as dictionary
return blocks
# write back internal representation into file
def dump(tree, filename=None):
with open(filename, 'w') as f:
for blk in tree.keys():
f.write('\n%s={\n' % blk)
for key,value in tree[blk].items():
f.write('\t%s=%s\n' % (key,value))
f.write('}\n')
if __name__=='__main__':
description = 'Update information in update.txt control file.'
usage = 'update_update.py filepath'
argp = argparse.ArgumentParser(usage=usage, description=description)
argp.add_argument('filepath', help='update.txt filepath to update contents of.')
if len(sys.argv) == 1:
argp.print_help()
sys.exit(1)
args = argp.parse_args()
# build config file representation
tree = parse(args.filepath)
dir = os.path.dirname(args.filepath)
# update all md5 sums
for blk in tree.keys():
filename = os.path.join(dir, os.path.basename(tree[blk]['file_path']))
with open(filename) as f:
tree[blk]['md5'] = hashlib.md5(f.read()).hexdigest()
# write back result
dump(tree, args.filepath)
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