1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
 
#!//usr/bin/env python

# Converts Nikola-style single-file bundled metadata
# timestamps from whatever time zone they were before and
# replaces them in-file with UTC.
# 
# Can easily be modified to work with other meta or file
# types, or perform other time zone shifts.
# 
# Possibly destructive. Backup your data before running.
# Provided as-is with no support. This program is licened
# in the pubic domain.

import sys
import datetime
import dateutil.tz
import dateutil.parser

infile = sys.argv[1]

lines = open(infile, 'r').readlines()
outlines = []
inheader = True
for l in lines:
  if inheader and '-->' in l: inheader = False
  if inheader:
    if 'updated: ' in l or 'date: ' in l:
      lineparts = l.split(': ')
      predate = lineparts[1]
      ctrldate = dateutil.parser.parse(predate)

      date = dateutil.parser.parse(predate)
      date = date.astimezone(dateutil.tz.gettz('UTC')).isoformat().replace('+00:00', 'Z')

      outlines.append(lineparts[0] + ': ' + date +'\n')
    else:
      outlines.append(l)
  else:
    outlines.append(l)

open(infile, 'w').write(''.join(outlines))