Added all required dependencies

vendor/github.com/Unknwon/cae/zip/stream.go

@@ -0,0 +1,77 @@
+// Copyright 2014 Unknown
+//
+// 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 zip
+
+import (
+	"archive/zip"
+	"io"
+	"os"
+	"path/filepath"
+)
+
+// A StreamArchive represents a streamable archive.
+type StreamArchive struct {
+	*zip.Writer
+}
+
+// NewStreamArachive returns a new streamable archive with given io.Writer.
+// It's caller's responsibility to close io.Writer and streamer after operation.
+func NewStreamArachive(w io.Writer) *StreamArchive {
+	return &StreamArchive{zip.NewWriter(w)}
+}
+
+// StreamFile streams a file or directory entry into StreamArchive.
+func (s *StreamArchive) StreamFile(relPath string, fi os.FileInfo, data []byte) error {
+	if fi.IsDir() {
+		fh, err := zip.FileInfoHeader(fi)
+		if err != nil {
+			return err
+		}
+		fh.Name = relPath + "/"
+		if _, err = s.Writer.CreateHeader(fh); err != nil {
+			return err
+		}
+	} else {
+		fh, err := zip.FileInfoHeader(fi)
+		if err != nil {
+			return err
+		}
+		fh.Name = filepath.Join(relPath, fi.Name())
+		fh.Method = zip.Deflate
+		fw, err := s.Writer.CreateHeader(fh)
+		if err != nil {
+			return err
+		} else if _, err = fw.Write(data); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// StreamReader streams data from io.Reader to StreamArchive.
+func (s *StreamArchive) StreamReader(relPath string, fi os.FileInfo, r io.Reader) (err error) {
+	fh, err := zip.FileInfoHeader(fi)
+	if err != nil {
+		return err
+	}
+	fh.Name = filepath.Join(relPath, fi.Name())
+
+	fw, err := s.Writer.CreateHeader(fh)
+	if err != nil {
+		return err
+	}
+	_, err = io.Copy(fw, r)
+	return err
+}