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// Copyright 2017 The Hugo Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package i18n
import (
"encoding/json"
"strings"
"github.com/gohugoio/hugo/common/paths"
"github.com/gohugoio/hugo/common/herrors"
"golang.org/x/text/language"
yaml "gopkg.in/yaml.v2"
"github.com/gohugoio/go-i18n/v2/i18n"
"github.com/gohugoio/hugo/helpers"
toml "github.com/pelletier/go-toml/v2"
"github.com/gohugoio/hugo/deps"
"github.com/gohugoio/hugo/hugofs"
"github.com/gohugoio/hugo/source"
_errors "github.com/pkg/errors"
)
// TranslationProvider provides translation handling, i.e. loading
// of bundles etc.
type TranslationProvider struct {
t Translator
}
// NewTranslationProvider creates a new translation provider.
func NewTranslationProvider() *TranslationProvider {
return &TranslationProvider{}
}
// Update updates the i18n func in the provided Deps.
func (tp *TranslationProvider) Update(d *deps.Deps) error {
spec := source.NewSourceSpec(d.PathSpec, nil, nil)
bundle := i18n.NewBundle(language.English)
bundle.RegisterUnmarshalFunc("toml", toml.Unmarshal)
bundle.RegisterUnmarshalFunc("yaml", yaml.Unmarshal)
bundle.RegisterUnmarshalFunc("yml", yaml.Unmarshal)
bundle.RegisterUnmarshalFunc("json", json.Unmarshal)
// The source dirs are ordered so the most important comes first. Since this is a
// last key win situation, we have to reverse the iteration order.
dirs := d.BaseFs.I18n.Dirs
for i := len(dirs) - 1; i >= 0; i-- {
dir := dirs[i]
src := spec.NewFilesystemFromFileMetaInfo(dir)
files, err := src.Files()
if err != nil {
return err
}
for _, file := range files {
if err := addTranslationFile(bundle, file); err != nil {
return err
}
}
}
tp.t = NewTranslator(bundle, d.Cfg, d.Log)
d.Translate = tp.t.Func(d.Language.Lang)
return nil
}
const artificialLangTagPrefix = "art-x-"
func addTranslationFile(bundle *i18n.Bundle, r source.File) error {
f, err := r.FileInfo().Meta().Open()
if err != nil {
return _errors.Wrapf(err, "failed to open translations file %q:", r.LogicalName())
}
b := helpers.ReaderToBytes(f)
f.Close()
name := r.LogicalName()
lang := paths.Filename(name)
tag := language.Make(lang)
if tag == language.Und {
name = artificialLangTagPrefix + name
}
_, err = bundle.ParseMessageFileBytes(b, name)
if err != nil {
if strings.Contains(err.Error(), "no plural rule") {
// https://github.com/gohugoio/hugo/issues/7798
name = artificialLangTagPrefix + name
_, err = bundle.ParseMessageFileBytes(b, name)
if err == nil {
return nil
}
}
return errWithFileContext(_errors.Wrapf(err, "failed to load translations"), r)
}
return nil
}
// Clone sets the language func for the new language.
func (tp *TranslationProvider) Clone(d *deps.Deps) error {
d.Translate = tp.t.Func(d.Language.Lang)
return nil
}
func errWithFileContext(inerr error, r source.File) error {
fim, ok := r.FileInfo().(hugofs.FileMetaInfo)
if !ok {
return inerr
}
meta := fim.Meta()
realFilename := meta.Filename
f, err := meta.Open()
if err != nil {
return inerr
}
defer f.Close()
err, _ = herrors.WithFileContext(
inerr,
realFilename,
f,
herrors.SimpleLineMatcher)
return err
}
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