add vendoring with go dep

vendor/github.com/vmware/govmomi/govc/importx/archive.go

@@ -0,0 +1,149 @@
+/*
+Copyright (c) 2014-2015 VMware, Inc. 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 importx
+
+import (
+	"archive/tar"
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path"
+	"path/filepath"
+
+	"github.com/vmware/govmomi/ovf"
+)
+
+// ArchiveFlag doesn't register any flags;
+// only encapsulates some common archive related functionality.
+type ArchiveFlag struct {
+	Archive
+}
+
+func newArchiveFlag(ctx context.Context) (*ArchiveFlag, context.Context) {
+	return &ArchiveFlag{}, ctx
+}
+
+func (f *ArchiveFlag) Register(ctx context.Context, fs *flag.FlagSet) {
+}
+
+func (f *ArchiveFlag) Process(ctx context.Context) error {
+	return nil
+}
+
+func (f *ArchiveFlag) ReadOvf(fpath string) ([]byte, error) {
+	r, _, err := f.Archive.Open(fpath)
+	if err != nil {
+		return nil, err
+	}
+	defer r.Close()
+
+	return ioutil.ReadAll(r)
+}
+
+func (f *ArchiveFlag) ReadEnvelope(fpath string) (*ovf.Envelope, error) {
+	if fpath == "" {
+		return &ovf.Envelope{}, nil
+	}
+
+	r, _, err := f.Open(fpath)
+	if err != nil {
+		return nil, err
+	}
+	defer r.Close()
+
+	e, err := ovf.Unmarshal(r)
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse ovf: %s", err.Error())
+	}
+
+	return e, nil
+}
+
+type Archive interface {
+	Open(string) (io.ReadCloser, int64, error)
+}
+
+type TapeArchive struct {
+	path string
+}
+
+type TapeArchiveEntry struct {
+	io.Reader
+	f *os.File
+}
+
+func (t *TapeArchiveEntry) Close() error {
+	return t.f.Close()
+}
+
+func (t *TapeArchive) Open(name string) (io.ReadCloser, int64, error) {
+	f, err := os.Open(t.path)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	r := tar.NewReader(f)
+
+	for {
+		h, err := r.Next()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return nil, 0, err
+		}
+
+		matched, err := path.Match(name, path.Base(h.Name))
+		if err != nil {
+			return nil, 0, err
+		}
+
+		if matched {
+			return &TapeArchiveEntry{r, f}, h.Size, nil
+		}
+	}
+
+	_ = f.Close()
+
+	return nil, 0, os.ErrNotExist
+}
+
+type FileArchive struct {
+	path string
+}
+
+func (t *FileArchive) Open(name string) (io.ReadCloser, int64, error) {
+	fpath := name
+	if name != t.path {
+		fpath = filepath.Join(filepath.Dir(t.path), name)
+	}
+
+	s, err := os.Stat(fpath)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	f, err := os.Open(fpath)
+	if err != nil {
+		return nil, 0, err
+	}
+
+	return f, s.Size(), nil
+}