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zoneinfo.go
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/
zoneinfo.go
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// Copyright 2016 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.
package timeutil
import (
"strings"
"time"
// embed tzdata in case system tzdata is not available.
_ "time/tzdata"
)
//go:generate go run gen/main.go
// LoadLocation returns the time.Location with the given name.
// The name is taken to be a location name corresponding to a file
// in the IANA Time Zone database, such as "America/New_York".
//
// We do not use Go's time.LoadLocation() directly because it maps
// "Local" to the local time zone, whereas we want UTC.
func LoadLocation(name string) (*time.Location, error) {
loweredName := strings.ToLower(name)
switch loweredName {
case "local", "default":
loweredName = "utc"
name = "UTC"
}
// If we know this is a lowercase name in tzdata, use the uppercase form.
if v, ok := lowercaseTimezones[loweredName]; ok {
// If this location is not found, we may have a case where the tzdata names
// have different values than the system tz names.
// If this is the case, allback onto the default logic, where the name is read
// off other sources before tzdata.
if loc, err := time.LoadLocation(v); err == nil {
return loc, nil
}
}
return time.LoadLocation(name)
}