add vendoring with go dep

vendor/github.com/vmware/govmomi/govc/flags/datastore.go

@@ -0,0 +1,120 @@
+/*
+Copyright (c) 2014-2016 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 flags
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/vmware/govmomi/object"
+	"github.com/vmware/govmomi/vim25/types"
+)
+
+type DatastoreFlag struct {
+	common
+
+	*DatacenterFlag
+
+	Name string
+
+	ds *object.Datastore
+}
+
+var datastoreFlagKey = flagKey("datastore")
+
+// NewCustomDatastoreFlag creates and returns a new DatastoreFlag without
+// trying to retrieve an existing one from the specified context.
+func NewCustomDatastoreFlag(ctx context.Context) (*DatastoreFlag, context.Context) {
+	v := &DatastoreFlag{}
+	v.DatacenterFlag, ctx = NewDatacenterFlag(ctx)
+	return v, ctx
+}
+
+func NewDatastoreFlag(ctx context.Context) (*DatastoreFlag, context.Context) {
+	if v := ctx.Value(datastoreFlagKey); v != nil {
+		return v.(*DatastoreFlag), ctx
+	}
+
+	v, ctx := NewCustomDatastoreFlag(ctx)
+	ctx = context.WithValue(ctx, datastoreFlagKey, v)
+	return v, ctx
+}
+
+func (f *DatastoreFlag) Register(ctx context.Context, fs *flag.FlagSet) {
+	f.RegisterOnce(func() {
+		f.DatacenterFlag.Register(ctx, fs)
+
+		env := "GOVC_DATASTORE"
+		value := os.Getenv(env)
+		usage := fmt.Sprintf("Datastore [%s]", env)
+		fs.StringVar(&f.Name, "ds", value, usage)
+	})
+}
+
+func (f *DatastoreFlag) Process(ctx context.Context) error {
+	return f.ProcessOnce(func() error {
+		if err := f.DatacenterFlag.Process(ctx); err != nil {
+			return err
+		}
+		return nil
+	})
+}
+
+func (f *DatastoreFlag) Datastore() (*object.Datastore, error) {
+	if f.ds != nil {
+		return f.ds, nil
+	}
+
+	finder, err := f.Finder()
+	if err != nil {
+		return nil, err
+	}
+
+	if f.ds, err = finder.DatastoreOrDefault(context.TODO(), f.Name); err != nil {
+		return nil, err
+	}
+
+	return f.ds, nil
+}
+
+func (flag *DatastoreFlag) DatastoreIfSpecified() (*object.Datastore, error) {
+	if flag.Name == "" {
+		return nil, nil
+	}
+	return flag.Datastore()
+}
+
+func (f *DatastoreFlag) DatastorePath(name string) (string, error) {
+	ds, err := f.Datastore()
+	if err != nil {
+		return "", err
+	}
+
+	return ds.Path(name), nil
+}
+
+func (f *DatastoreFlag) Stat(ctx context.Context, file string) (types.BaseFileInfo, error) {
+	ds, err := f.Datastore()
+	if err != nil {
+		return nil, err
+	}
+
+	return ds.Stat(ctx, file)
+
+}