// much less dot dot. Likewise, none begin with a slash.
		return nil, errLocation
	}
	zoneinfoOnce.Do(func() {
		env, _ := syscall.Getenv("ZONEINFO")
		zoneinfo = &env
	})
	var firstErr error
	if *zoneinfo != "" {
		if zoneData, err := loadTzinfoFromDirOrZip(*zoneinfo, name); err == nil {
			if z, err := LoadLocationFromTZData(name, zoneData); err == nil {
				return z, nil
			}
			firstErr = err

Dmitri Shuralyov <******@****.***> 1706824550 -0500

//go:build unix && !ios && !android

// Parse "zoneinfo" time zone file.
// This is a fairly standard file format used on OS X, Linux, BSD, Sun, and others.
// See tzfile(5), https://en.wikipedia.org/wiki/Zoneinfo,
// and ftp://munnari.oz.au/pub/oldtz/

package time

import (
	"syscall"
)

// Many systems use /usr/share/zoneinfo, Solaris 2 has
// /usr/share/lib/zoneinfo, IRIX 6 has /usr/lib/locale/TZ,
// NixOS has /etc/zoneinfo.

// Parse the "tzdata" packed timezone file used on Android.
// The format is lifted from ZoneInfoDB.java and ZoneInfo.java in
// java/libcore/util in the AOSP.

package time

import (
	"errors"
	"syscall"
)

var platformZoneSources = []string{
	"/system/usr/share/zoneinfo/tzdata",
	"/data/misc/zoneinfo/current/tzdata",
}

func initLocal() {
	// TODO(elias.naur): getprop persist.sys.timezone

// 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

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

// license that can be found in the LICENSE file.

//go:build js && wasm

package time

import (
	"internal/itoa"
	"syscall/js"
)

var platformZoneSources = []string{
	"/usr/share/zoneinfo/",
	"/usr/share/lib/zoneinfo/",
	"/usr/lib/locale/TZ/",
}

func initLocal() {
	localLoc.name = "Local"

	z := zone{}
	d := js.Global().Get("Date").New()
	offset := d.Call("getTimezoneOffset").Int() * -1

func gorootZoneSource(goroot string) (string, bool) {
	// The working directory at initialization is the root of the
	// app bundle: "/private/.../bundlename.app". That's where we
	// keep zoneinfo.zip for tethered iOS builds.
	// For self-hosted iOS builds, the zoneinfo.zip is in GOROOT.
	var roots []string
	if goroot != "" {
		roots = append(roots, goroot+"/lib/time")
	}
	wd, err := syscall.Getwd()
	if err == nil {
		roots = append(roots, wd)

//go:build !ios && !android

package time

func gorootZoneSource(goroot string) (string, bool) {
	if goroot == "" {
		return "", false
	}
	return goroot + "/lib/time/zoneinfo.zip", true

	defer time.ResetZoneinfoForTesting()

	if zoneinfo := time.ZoneinfoForTesting(); testZoneinfo != *zoneinfo {
		t.Errorf("zoneinfo does not match env variable: got %q want %q", *zoneinfo, testZoneinfo)
	}
}

func TestBadLocationErrMsg(t *testing.T) {
	time.ResetZoneinfoForTesting()
	loc := "Asia/SomethingNotExist"
	want := errors.New("unknown time zone " + loc)
	_, err := time.LoadLocation(loc)