Switch to v1.0.2 of github.com/chai2010/gettext-go

Signed-off-by: Davanum Srinivas <davanum@gmail.com>

vendor/github.com/chai2010/gettext-go/po/file.go

@@ -0,0 +1,81 @@
+// Copyright 2013 ChaiShushan <chaishushan{AT}gmail.com>. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package po
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"sort"
+)
+
+// File represents an PO File.
+//
+// See http://www.gnu.org/software/gettext/manual/html_node/PO-Files.html
+type File struct {
+	MimeHeader Header
+	Messages   []Message
+}
+
+// Load loads po file format data.
+func Load(data []byte) (*File, error) {
+	return loadData(data)
+}
+
+// LoadFile loads a named po file.
+func LoadFile(path string) (*File, error) {
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+	return loadData(data)
+}
+
+func loadData(data []byte) (*File, error) {
+	r := newLineReader(string(data))
+	var file File
+	for {
+		var msg Message
+		if err := msg.readPoEntry(r); err != nil {
+			if err == io.EOF {
+				return &file, nil
+			}
+			return nil, err
+		}
+		if msg.MsgId == "" {
+			file.MimeHeader.parseHeader(&msg)
+			continue
+		}
+		file.Messages = append(file.Messages, msg)
+	}
+}
+
+// Save saves a po file.
+func (f *File) Save(name string) error {
+	return ioutil.WriteFile(name, []byte(f.String()), 0666)
+}
+
+// Save returns a po file format data.
+func (f *File) Data() []byte {
+	// sort the massge as ReferenceFile/ReferenceLine field
+	var messages []Message
+	messages = append(messages, f.Messages...)
+	sort.Slice(messages, func(i, j int) bool {
+		return messages[i].less(&messages[j])
+	})
+
+	var buf bytes.Buffer
+	fmt.Fprintf(&buf, "%s\n", f.MimeHeader.String())
+	for i := 0; i < len(messages); i++ {
+		fmt.Fprintf(&buf, "%s\n", messages[i].String())
+	}
+	return buf.Bytes()
+}
+
+// String returns the po format file string.
+func (f *File) String() string {
+	return string(f.Data())
+}