update.bash

     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.
    27  CODE=2023d
    28  DATA=2023d
    29  
    30  set -e
    31  
    32  cd $(dirname $0)
    33  rm -rf work
    34  mkdir work
    35  go build -o work/mkzip mkzip.go # build now for correct paths in build errors
    36  cd work
    37  mkdir zoneinfo
    38  curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzcode$CODE.tar.gz
    39  curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
    40  tar xzf tzcode$CODE.tar.gz
    41  tar xzf tzdata$DATA.tar.gz
    42  
    43  if ! make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only >make.out 2>&1; then
    44  	cat make.out
    45  	exit 2
    46  fi
    47  
    48  cd zoneinfo
    49  ../mkzip ../../zoneinfo.zip
    50  cd ../..
    51  
    52  files="update.bash zoneinfo.zip"
    53  modified=true
    54  if git diff --quiet $files; then
    55  	modified=false
    56  fi
    57  
    58  if [ "$1" = "-work" ]; then
    59  	echo Left workspace behind in work/.
    60  	shift
    61  else
    62  	rm -rf work
    63  fi
    64  
    65  if ! $modified; then
    66  	echo No updates needed.
    67  	exit 0
    68  fi
    69  
    70  echo Updated for $CODE/$DATA: $files
    71  
    72  commitmsg="lib/time: update to $CODE/$DATA
    73  
    74  Commit generated by update.bash.
    75  
    76  For #22487.
    77  "
    78  
    79  if [ "$1" = "-commit" ]; then
    80  	echo "Creating commit. Run 'git reset HEAD^' to undo commit."
    81  	echo
    82  	git commit -m "$commitmsg" $files
    83  	echo
    84  	git log -n1 --stat
    85  	echo
    86  fi
    87
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