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#!/usr/bin/env python
'''
$Id: gen_tzinfo.py,v 1.21 2005/02/15 20:21:38 zenzen Exp $
'''
from __future__ import print_function
import sys
import os
import os.path
import shutil
from glob import glob
from pprint import pprint
import re
zoneinfo = os.path.abspath(os.path.join(
os.path.dirname(__file__), 'build', 'etc', 'zoneinfo'
))
def allzones():
''' Return all available tzfile(5) files in the zoneinfo database '''
zones = []
for dirpath, dirnames, filenames in os.walk(zoneinfo):
for f in filenames:
p = os.path.join(dirpath, f)
if open(p, 'rb').read(4) == b'TZif':
zones.append(p)
stripnum = len(os.path.commonprefix(zones))
zones = [z[stripnum:] for z in zones]
if target:
wanted = target + ['US/Eastern', 'UTC']
zones = [z for z in zones if z in wanted]
# Does not cope with Riyadh87-89 - it appears this region went
# on solar time during this period and their DST offset changed
# minute to minute (the Olson database could only capture a precision
# of 5 seconds because of way too many zone changes, so the data isn't
# 100% accurate anyway).
# 'Factory' and 'localtime' appear to be Olson reference code specific
# and are skipped
zones = [z for z in zones if 'Riyadh8' not in z and z not in [
'Factory', 'localtime', 'posixrules']]
zones.sort()
assert len(zones) > 0
return zones
def links():
'''Mapping of alias -> canonical name'''
l = {}
olson_src_files = ['tz/vanguard.zi', 'tz/main.zi', 'tz/rearguard.zi']
for filename in olson_src_files:
for line in open(filename, 'r'):
if line.strip().startswith('#') or not line.strip():
continue
match = re.search(r'^\s*Link\s+([\w/\-]+)\s+([\w/\-]+)', line)
if match is not None:
new_name = match.group(1)
old_name = match.group(2)
l[old_name] = new_name
else:
assert not line.startswith('Link'), line
assert 'Portugal' in l, 'Portugal should be in links()'
return l
def dupe_src(destdir):
''' Copy ./src to our dest directory '''
if not os.path.isdir(destdir):
os.makedirs(destdir)
for f in glob(os.path.join('src', '*')):
if not os.path.isdir(f):
shutil.copy(f, destdir)
destdir = os.path.join(destdir, 'pytz')
if not os.path.isdir(destdir):
os.makedirs(destdir)
for f in glob(os.path.join('src', 'pytz', '*')):
if not os.path.isdir(f):
shutil.copy(f, destdir)
destdir = os.path.join(destdir, 'tests')
if not os.path.isdir(destdir):
os.makedirs(destdir)
for f in glob(os.path.join('src', 'pytz', 'tests', '*')):
if not os.path.isdir(f):
shutil.copy(f, destdir)
def add_allzones(filename):
''' Append a list of all know timezones to the end of the file '''
outf = open(filename, 'a')
obsolete_zones = links().keys()
# Calculate 'common' timezones as best we can. We start with all
# timezones, strip out the legacy noise, and any name linked to
# a more canonical name (eg. Asia/Singapore is preferred to just
# Singapore)
cz = [
z for z in allzones()
if (z not in obsolete_zones and
'/' in z and
not z.startswith('SystemV/') and
not z.startswith('Etc/'))]
# And extend our list manually with stuff we think deserves to be
# labelled 'common'.
cz.extend([
'UTC', 'GMT', 'US/Eastern', 'US/Pacific', 'US/Mountain',
'US/Central', 'US/Arizona', 'US/Hawaii', 'US/Alaska',
# Canadian timezones per Bug #506341
'Canada/Newfoundland', 'Canada/Atlantic', 'Canada/Eastern',
'Canada/Central', 'Canada/Mountain', 'Canada/Pacific'])
# And extend out list with all preferred country timezones.
zone_tab = open(os.path.join(zoneinfo, 'zone.tab'), 'r')
for line in zone_tab:
if line.startswith('#'):
continue
code, coordinates, zone = line.split(None, 4)[:3]
if zone not in cz:
cz.append(zone)
cz.sort()
print('_all_timezones_unchecked = \\', file=outf)
pprint(sorted(allzones()), outf)
print('''all_timezones = LazyList(
tz for tz in _all_timezones_unchecked if resource_exists(tz))
''', file=outf)
print('all_timezones_set = LazySet(all_timezones)', file=outf)
# Per lp:1835784 we can't afford to do this at import time
# print >> outf, '_all_timezones_lower_to_standard = dict((tz.lower(), tz) for tz in all_timezones)'
print('common_timezones = \\', file=outf)
pprint(cz, outf)
print('''common_timezones = LazyList(
tz for tz in common_timezones if tz in all_timezones)
''', file=outf)
print('common_timezones_set = LazySet(common_timezones)', file=outf)
outf.close()
def main(destdir):
_destdir = os.path.join(os.path.abspath(destdir), 'dist')
dupe_src(_destdir)
add_allzones(os.path.join(_destdir, 'pytz', '__init__.py'))
target = None
if __name__ == '__main__':
try:
target = sys.argv[1:]
except IndexError:
target = None
main('build')
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