133 lines
3.5 KiB
Go
133 lines
3.5 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package i18n
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import (
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"archive/zip"
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"bytes"
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"errors"
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"fmt"
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"os"
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"strings"
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"k8s.io/kubernetes/pkg/generated"
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"github.com/chai2010/gettext-go/gettext"
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"github.com/golang/glog"
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)
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var knownTranslations = map[string][]string{
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"kubectl": {
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"default",
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"en_US",
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},
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// only used for unit tests.
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"test": {
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"default",
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"en_US",
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},
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}
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func loadSystemLanguage() string {
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langStr := os.Getenv("LANG")
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if langStr == "" {
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glog.V(3).Infof("Couldn't find the LANG environment variable, defaulting to en-US")
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return "default"
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}
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pieces := strings.Split(langStr, ".")
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if len(pieces) == 0 {
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glog.V(3).Infof("Unexpected system language (%s), defaulting to en-US", langStr)
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return "default"
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}
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return pieces[0]
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}
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func findLanguage(root string, getLanguageFn func() string) string {
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langStr := getLanguageFn()
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translations := knownTranslations[root]
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if translations != nil {
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for ix := range translations {
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if translations[ix] == langStr {
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return langStr
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}
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}
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}
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glog.V(3).Infof("Couldn't find translations for %s, using default", langStr)
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return "default"
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}
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// LoadTranslations loads translation files. getLanguageFn should return a language
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// string (e.g. 'en-US'). If getLanguageFn is nil, then the loadSystemLanguage function
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// is used, which uses the 'LANG' environment variable.
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func LoadTranslations(root string, getLanguageFn func() string) error {
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if getLanguageFn == nil {
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getLanguageFn = loadSystemLanguage
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}
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langStr := findLanguage(root, getLanguageFn)
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translationFiles := []string{
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fmt.Sprintf("%s/%s/LC_MESSAGES/k8s.po", root, langStr),
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fmt.Sprintf("%s/%s/LC_MESSAGES/k8s.mo", root, langStr),
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}
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glog.V(3).Infof("Setting language to %s", langStr)
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// TODO: list the directory and load all files.
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buf := new(bytes.Buffer)
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w := zip.NewWriter(buf)
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// Make sure to check the error on Close.
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for _, file := range translationFiles {
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filename := "translations/" + file
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f, err := w.Create(file)
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if err != nil {
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return err
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}
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data, err := generated.Asset(filename)
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if err != nil {
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return err
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}
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if _, err := f.Write(data); err != nil {
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return nil
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}
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}
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if err := w.Close(); err != nil {
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return err
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}
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gettext.BindTextdomain("k8s", root+".zip", buf.Bytes())
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gettext.Textdomain("k8s")
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gettext.SetLocale(langStr)
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return nil
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}
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// T translates a string, possibly substituting arguments into it along
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// the way. If len(args) is > 0, args1 is assumed to be the plural value
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// and plural translation is used.
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func T(defaultValue string, args ...int) string {
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if len(args) == 0 {
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return gettext.PGettext(defaultValue, defaultValue)
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}
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return fmt.Sprintf(gettext.PNGettext(defaultValue, defaultValue, defaultValue+".plural", args[0]),
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args[0])
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}
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// Errorf produces an error with a translated error string.
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// Substitution is performed via the `T` function above, following
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// the same rules.
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func Errorf(defaultValue string, args ...int) error {
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return errors.New(T(defaultValue, args...))
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}
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