diff options
Diffstat (limited to 'lib/time')
-rw-r--r-- | lib/time/README | 10 | ||||
-rw-r--r-- | lib/time/mkzip.go | 94 | ||||
-rwxr-xr-x | lib/time/update.bash | 87 | ||||
-rw-r--r-- | lib/time/zoneinfo.zip | bin | 0 -> 397464 bytes |
4 files changed, 191 insertions, 0 deletions
diff --git a/lib/time/README b/lib/time/README new file mode 100644 index 0000000..0de06df --- /dev/null +++ b/lib/time/README @@ -0,0 +1,10 @@ +The zoneinfo.zip archive contains time zone files compiled using +the code and data maintained as part of the IANA Time Zone Database. +The IANA asserts that the database is in the public domain. + +For more information, see +https://www.iana.org/time-zones +ftp://ftp.iana.org/tz/code/tz-link.html +https://datatracker.ietf.org/doc/html/rfc6557 + +To rebuild the archive, read and run update.bash. diff --git a/lib/time/mkzip.go b/lib/time/mkzip.go new file mode 100644 index 0000000..3920b11 --- /dev/null +++ b/lib/time/mkzip.go @@ -0,0 +1,94 @@ +// Copyright 2022 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +//go:build ignore + +// Mkzip writes a zoneinfo.zip with the content of the current directory +// and its subdirectories, with no compression, suitable for package time. +// +// Usage: +// +// go run ../../mkzip.go ../../zoneinfo.zip +// +// We use this program instead of 'zip -0 -r ../../zoneinfo.zip *' to get +// a reproducible generator that does not depend on which version of the +// external zip tool is used or the ordering of file names in a directory +// or the current time. +package main + +import ( + "archive/zip" + "bytes" + "flag" + "fmt" + "hash/crc32" + "io/fs" + "log" + "os" + "path/filepath" + "strings" +) + +func usage() { + fmt.Fprintf(os.Stderr, "usage: go run mkzip.go ../../zoneinfo.zip\n") + os.Exit(2) +} + +func main() { + log.SetPrefix("mkzip: ") + log.SetFlags(0) + flag.Usage = usage + flag.Parse() + args := flag.Args() + if len(args) != 1 || !strings.HasSuffix(args[0], ".zip") { + usage() + } + + var zb bytes.Buffer + zw := zip.NewWriter(&zb) + seen := make(map[string]bool) + err := filepath.WalkDir(".", func(path string, d fs.DirEntry, err error) error { + if d.IsDir() { + return nil + } + data, err := os.ReadFile(path) + if err != nil { + log.Fatal(err) + } + if strings.HasSuffix(path, ".zip") { + log.Fatalf("unexpected file during walk: %s", path) + } + name := filepath.ToSlash(path) + w, err := zw.CreateRaw(&zip.FileHeader{ + Name: name, + Method: zip.Store, + CompressedSize64: uint64(len(data)), + UncompressedSize64: uint64(len(data)), + CRC32: crc32.ChecksumIEEE(data), + }) + if err != nil { + log.Fatal(err) + } + if _, err := w.Write(data); err != nil { + log.Fatal(err) + } + seen[name] = true + return nil + }) + if err != nil { + log.Fatal(err) + } + if err := zw.Close(); err != nil { + log.Fatal(err) + } + if len(seen) == 0 { + log.Fatalf("did not find any files to add") + } + if !seen["US/Eastern"] { + log.Fatalf("did not find US/Eastern to add") + } + if err := os.WriteFile(args[0], zb.Bytes(), 0666); err != nil { + log.Fatal(err) + } +} diff --git a/lib/time/update.bash b/lib/time/update.bash new file mode 100755 index 0000000..48606b9 --- /dev/null +++ b/lib/time/update.bash @@ -0,0 +1,87 @@ +#!/bin/bash +# Copyright 2012 The Go Authors. All rights reserved. +# Use of this source code is governed by a BSD-style +# license that can be found in the LICENSE file. + +# This script rebuilds the time zone files using files +# downloaded from the ICANN/IANA distribution. +# +# To prepare an update for a new Go release, +# consult https://www.iana.org/time-zones for the latest versions, +# update CODE and DATA below, and then run +# +# ./update.bash -commit +# +# That will prepare the files and create the commit. +# +# To review such a commit (as the reviewer), use: +# +# git codereview change NNNNNN # CL number +# cd lib/time +# ./update.bash +# +# If it prints "No updates needed.", then the generated files +# in the CL match the update.bash in the CL. + +# Versions to use. +CODE=2022g +DATA=2022g + +set -e + +cd $(dirname $0) +rm -rf work +mkdir work +go build -o work/mkzip mkzip.go # build now for correct paths in build errors +cd work +mkdir zoneinfo +curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzcode$CODE.tar.gz +curl -sS -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz +tar xzf tzcode$CODE.tar.gz +tar xzf tzdata$DATA.tar.gz + +if ! make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only >make.out 2>&1; then + cat make.out + exit 2 +fi + +cd zoneinfo +../mkzip ../../zoneinfo.zip +cd ../.. +go generate time/tzdata + +files="update.bash zoneinfo.zip ../../src/time/tzdata/zipdata.go" +modified=true +if git diff --quiet $files; then + modified=false +fi + +if [ "$1" = "-work" ]; then + echo Left workspace behind in work/. + shift +else + rm -rf work +fi + +if ! $modified; then + echo No updates needed. + exit 0 +fi + +echo Updated for $CODE/$DATA: $files + +commitmsg="lib/time: update to $CODE/$DATA + +Commit generated by update.bash. + +For #22487. +" + +if [ "$1" = "-commit" ]; then + echo "Creating commit. Run 'git reset HEAD^' to undo commit." + echo + git commit -m "$commitmsg" $files + echo + git log -n1 --stat + echo +fi diff --git a/lib/time/zoneinfo.zip b/lib/time/zoneinfo.zip Binary files differnew file mode 100644 index 0000000..9b31ec1 --- /dev/null +++ b/lib/time/zoneinfo.zip |