From 5d967e43d03e9c916548b9c290b0c4138df2f1f8 Mon Sep 17 00:00:00 2001
From: Elliott Hughes <enh@google.com>
Date: Fri, 20 Jul 2012 16:52:39 -0700
Subject: [PATCH] Upgrade to tzdata2012d.

This upgrade involved rewriting the script; the data has moved to ftp.iana.org,
where it's slightly less convenient to access, so it's time to use something
that can talk FTP...

As for tzdata2012d, it's just updating Morocco for this weekend's changes, now
they've been decided at the last minute (as usual).

Change-Id: I772df57a6e09b3bf3d9541bfc08930d6f18633b4
---
 libc/tools/zoneinfo/generate   | 193 +++++++++++++++++++++------------
 libc/zoneinfo/zoneinfo.dat     | Bin 484319 -> 484347 bytes
 libc/zoneinfo/zoneinfo.idx     | Bin 29952 -> 29900 bytes
 libc/zoneinfo/zoneinfo.version |   2 +-
 4 files changed, 122 insertions(+), 73 deletions(-)

diff --git a/libc/tools/zoneinfo/generate b/libc/tools/zoneinfo/generate
index 3e21d0b9f..2059abd15 100755
--- a/libc/tools/zoneinfo/generate
+++ b/libc/tools/zoneinfo/generate
@@ -1,82 +1,131 @@
-#!/bin/bash
+#!/usr/bin/python
 # Run with no arguments from any directory, with no special setup required.
 
-# Abort if any command returns an error exit status, or if an undefined
-# variable is used.
-set -e
-set -u
+import ftplib
+import hashlib
+import os
+import re
+import shutil
+import string
+import subprocess
+import sys
+import tarfile
+import tempfile
 
-echo "Looking for bionic..."
-bionic_dir=$(cd $(dirname $0)/../../.. && pwd)
-bionic_zoneinfo_dir=$bionic_dir/libc/zoneinfo
-bionic_zoneinfo_tools_dir=$bionic_dir/libc/tools/zoneinfo
-if [[ ! -d "$bionic_zoneinfo_dir" || ! -d "$bionic_zoneinfo_tools_dir" ]]; then
-  echo "Can't find bionic's zoneinfo directories!"
-  exit 1
-fi
+# Find the bionic directory, searching upward from this script.
+bionic_libc_tools_zoneinfo_dir = os.path.realpath(os.path.dirname(sys.argv[0]))
+bionic_libc_tools_dir = os.path.dirname(bionic_libc_tools_zoneinfo_dir)
+bionic_libc_dir = os.path.dirname(bionic_libc_tools_dir)
+bionic_dir = os.path.dirname(bionic_libc_dir)
+bionic_libc_zoneinfo_dir = '%s/libc/zoneinfo' % bionic_dir
+if not os.path.isdir(bionic_libc_tools_zoneinfo_dir) or not os.path.isdir(bionic_libc_zoneinfo_dir):
+  print "Couldn't find bionic/libc/tools/zoneinfo!"
+  sys.exit(1)
+print 'Found bionic in %s...' % bionic_dir
+
+
+regions = ['africa', 'antarctica', 'asia', 'australasia', 'backward', 'etcetera', 'europe', 'factory', 'northamerica', 'southamerica']
+
+
+def current_tzdata_version():
+  return open('%s/zoneinfo.version' % bionic_libc_zoneinfo_dir).readline().rstrip('\n')
+
+
+def md5_file(filename):
+  md5 = hashlib.md5()
+  f = open(filename, 'rb')
+  while True:
+    data = f.read(8192)
+    if not data:
+      break
+    md5.update(data)
+  return md5.hexdigest()
+
+
+def upgrade_to(ftp, filename):
+  version = re.search('tzdata(.+)\.tar\.gz', filename).group(1)
+
+  # Switch to a temporary directory.
+  tmp_dir = tempfile.mkdtemp('-tzdata')
+  os.chdir(tmp_dir)
+  print 'Created temporary directory "%s"...' % tmp_dir
+
+  print 'Downloading %s...' % filename
+  ftp.retrbinary('RETR %s' % filename, open(filename, 'wb').write)
+  print 'MD5: %s' % md5_file(filename)
+
+  print 'Extracting...'
+  os.mkdir('extracted')
+  tar = tarfile.open(filename, 'r')
+  tar.extractall('extracted')
+
+  print 'Calling zic(1)...'
+  os.mkdir('data')
+  for region in regions:
+    if region != 'backward':
+      subprocess.check_call(['zic', '-d', 'data', 'extracted/%s' % region])
+
+  # Collect the data ZoneCompactor needs.
+  links = []
+  zones = []
+  for region in regions:
+    for line in open('extracted/%s' % region).readlines():
+      fields = string.split(line)
+      if len(fields) == 0:
+        continue
+      elif fields[0] == 'Link':
+        links.append('%s %s %s\n' % (fields[0], fields[1], fields[2]))
+        zones.append(fields[2])
+      elif fields[0] == 'Zone':
+        zones.append(fields[1])
+  zones.sort()
+
+  # Write it into the "setup" file.
+  setup = open('setup', 'w')
+  for link in links:
+    setup.write(link)
+  for zone in zones:
+    setup.write('%s\n' % zone)
+  setup.close()
+
+  print 'Calling ZoneCompactor...'
+  subprocess.check_call(['javac', '-d', '.',
+                         '%s/ZoneCompactor.java' % bionic_libc_tools_zoneinfo_dir,
+                         '%s/ZoneInfo.java' % bionic_libc_tools_zoneinfo_dir])
+  subprocess.check_call(['java', 'ZoneCompactor', 'setup', 'data'])
+
+  print 'Updating bionic from %s to %s...' % (current_tzdata_version(), version)
+  # Move the .dat and .idx files...
+  os.remove('%s/zoneinfo.dat' % bionic_libc_zoneinfo_dir)
+  shutil.move('zoneinfo.dat', bionic_libc_zoneinfo_dir)
+  os.remove('%s/zoneinfo.idx' % bionic_libc_zoneinfo_dir)
+  shutil.move('zoneinfo.idx', bionic_libc_zoneinfo_dir)
+  # Write the .version file...
+  zoneinfo_version = open('%s/zoneinfo.version' % bionic_libc_zoneinfo_dir, 'wb+')
+  zoneinfo_version.write('%s\n' % version)
+  zoneinfo_version.close()
 
-echo "Switching to temporary directory..."
-temp_dir=`mktemp -d`
-cd $temp_dir
-trap "rm -rf $temp_dir; exit" INT TERM EXIT
 
 # URL from "Sources for Time Zone and Daylight Saving Time Data"
 # http://www.twinsun.com/tz/tz-link.htm
-echo "Looking for new tzdata..."
-wget -N --no-verbose 'ftp://munnari.oz.au/pub/tzdata*.tar.gz'
-zoneinfo_version_file=$bionic_zoneinfo_dir/zoneinfo.version
-if [ -f "$zoneinfo_version_file" ]; then
-  current_version=tzdata`sed s/\n// < $zoneinfo_version_file`
-else
-  current_version=missing
-fi
-latest_archive=`ls -r -v tzdata*.tar.gz | head -n1`
-latest_version=`basename $latest_archive .tar.gz`
-if [ "$current_version" == "$latest_version" ]; then
-  echo "You already have the latest tzdata ($latest_version)!"
-  exit 1
-fi
 
-md5_sum=`md5sum $latest_archive`
-echo "MD5: $md5_sum"
+print 'Looking for new tzdata...'
+ftp = ftplib.FTP('ftp.iana.org')
+ftp.login()
+ftp.cwd('tz/releases')
+tzdata_filenames = []
+for filename in ftp.nlst():
+  if filename.startswith('tzdata20'):
+    tzdata_filenames.append(filename)
+tzdata_filenames.sort()
 
-echo "Extracting $latest_version..."
-mkdir $latest_version
-tar -C $latest_version -zxf $latest_archive
+# If you're several releases behind, we'll walk you through the upgrades one by one.
+current_version = current_tzdata_version()
+current_filename = 'tzdata%s.tar.gz' % current_version
+for filename in tzdata_filenames:
+  if filename > current_filename:
+    upgrade_to(ftp, filename)
+    sys.exit(0)
 
-echo "Compiling $latest_version..."
-mkdir data
-for i in \
-    africa \
-    antarctica \
-    asia \
-    australasia \
-    etcetera \
-    europe \
-    factory \
-    northamerica \
-    solar87 \
-    solar88 \
-    solar89 \
-    southamerica
-do
-    zic -d data $latest_version/$i
-done
-
-echo "Compacting $latest_version..."
-(
-    cat $latest_version/* | grep '^Link' | awk '{print $1, $2, $3}'
-    (
-        cat $latest_version/* | grep '^Zone' | awk '{print $2}'
-        cat $latest_version/* | grep '^Link' | awk '{print $3}'
-    ) | LC_ALL="C" sort
-) | grep -v Riyadh8 > setup
-
-javac -d . \
-    $bionic_zoneinfo_tools_dir/ZoneCompactor.java \
-    $bionic_zoneinfo_tools_dir/ZoneInfo.java
-java ZoneCompactor setup data
-
-echo "Updating bionic to $latest_version..."
-mv zoneinfo.dat zoneinfo.idx $bionic_zoneinfo_dir
-echo $latest_version | sed 's/tzdata//' > $bionic_zoneinfo_dir/zoneinfo.version
+print 'You already have the latest tzdata (%s)!' % current_version
+sys.exit(0)
diff --git a/libc/zoneinfo/zoneinfo.dat b/libc/zoneinfo/zoneinfo.dat
index cc1cb389d7fd5a7ec88b5948c6c873945b1923b3..77992559511236a29a2f475df3159b08795aeccc 100644
GIT binary patch
delta 93
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delta 72
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diff --git a/libc/zoneinfo/zoneinfo.idx b/libc/zoneinfo/zoneinfo.idx
index 0483c285f4d1bea496805a5aff9ecadc7d7dc931..507ae7a389db68630c35dd31a27900e90c574a1c 100644
GIT binary patch
delta 3626
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diff --git a/libc/zoneinfo/zoneinfo.version b/libc/zoneinfo/zoneinfo.version
index 9412b94ca..e60676198 100644
--- a/libc/zoneinfo/zoneinfo.version
+++ b/libc/zoneinfo/zoneinfo.version
@@ -1 +1 @@
-2012c
+2012d