1#!/bin/bash
2# Copyright 2012 The Go Authors. All rights reserved.
3# Use of this source code is governed by a BSD-style
4# license that can be found in the LICENSE file.
5
6# This script rebuilds the time zone files using files
7# downloaded from the ICANN/IANA distribution.
8#
9# To prepare an update for a new Go release,
10# consult https://www.iana.org/time-zones for the latest versions,
11# update CODE and DATA below, and then run
12#
13#	./update.bash -commit
14#
15# That will prepare the files and create the commit.
16#
17# To review such a commit (as the reviewer), use:
18#
19#	git codereview change NNNNNN   # CL number
20#	cd lib/time
21#	./update.bash
22#
23# If it prints "No updates needed.", then the generated files
24# in the CL match the update.bash in the CL.
25
26# Versions to use.
27CODE=2024a
28DATA=2024a
29
30set -e
31
32cd $(dirname $0)
33rm -rf work
34mkdir work
35go build -o work/mkzip mkzip.go # build now for correct paths in build errors
36cd work
37mkdir zoneinfo
38curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzcode$CODE.tar.gz
39curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
40tar xzf tzcode$CODE.tar.gz
41tar xzf tzdata$DATA.tar.gz
42
43if ! make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only >make.out 2>&1; then
44	cat make.out
45	exit 2
46fi
47
48cd zoneinfo
49../mkzip ../../zoneinfo.zip
50cd ../..
51
52files="update.bash zoneinfo.zip"
53modified=true
54if git diff --quiet $files; then
55	modified=false
56fi
57
58if [ "$1" = "-work" ]; then
59	echo Left workspace behind in work/.
60	shift
61else
62	rm -rf work
63fi
64
65if ! $modified; then
66	echo No updates needed.
67	exit 0
68fi
69
70echo Updated for $CODE/$DATA: $files
71
72commitmsg="lib/time: update to $CODE/$DATA
73
74Commit generated by update.bash.
75
76For #22487.
77"
78
79if [ "$1" = "-commit" ]; then
80	echo "Creating commit. Run 'git reset HEAD^' to undo commit."
81	echo
82	git commit -m "$commitmsg" $files
83	echo
84	git log -n1 --stat
85	echo
86fi
87