add vendoring with go dep

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

@@ -0,0 +1,141 @@
+/*
+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 flags
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/vmware/govmomi/object"
+)
+
+type HostSystemFlag struct {
+	common
+
+	*ClientFlag
+	*DatacenterFlag
+	*SearchFlag
+
+	name string
+	host *object.HostSystem
+	pool *object.ResourcePool
+}
+
+var hostSystemFlagKey = flagKey("hostSystem")
+
+func NewHostSystemFlag(ctx context.Context) (*HostSystemFlag, context.Context) {
+	if v := ctx.Value(hostSystemFlagKey); v != nil {
+		return v.(*HostSystemFlag), ctx
+	}
+
+	v := &HostSystemFlag{}
+	v.ClientFlag, ctx = NewClientFlag(ctx)
+	v.DatacenterFlag, ctx = NewDatacenterFlag(ctx)
+	v.SearchFlag, ctx = NewSearchFlag(ctx, SearchHosts)
+	ctx = context.WithValue(ctx, hostSystemFlagKey, v)
+	return v, ctx
+}
+
+func (flag *HostSystemFlag) Register(ctx context.Context, f *flag.FlagSet) {
+	flag.RegisterOnce(func() {
+		flag.ClientFlag.Register(ctx, f)
+		flag.DatacenterFlag.Register(ctx, f)
+		flag.SearchFlag.Register(ctx, f)
+
+		env := "GOVC_HOST"
+		value := os.Getenv(env)
+		usage := fmt.Sprintf("Host system [%s]", env)
+		f.StringVar(&flag.name, "host", value, usage)
+	})
+}
+
+func (flag *HostSystemFlag) Process(ctx context.Context) error {
+	return flag.ProcessOnce(func() error {
+		if err := flag.ClientFlag.Process(ctx); err != nil {
+			return err
+		}
+		if err := flag.DatacenterFlag.Process(ctx); err != nil {
+			return err
+		}
+		if err := flag.SearchFlag.Process(ctx); err != nil {
+			return err
+		}
+		return nil
+	})
+}
+
+func (flag *HostSystemFlag) HostSystemIfSpecified() (*object.HostSystem, error) {
+	if flag.host != nil {
+		return flag.host, nil
+	}
+
+	// Use search flags if specified.
+	if flag.SearchFlag.IsSet() {
+		host, err := flag.SearchFlag.HostSystem()
+		if err != nil {
+			return nil, err
+		}
+
+		flag.host = host
+		return flag.host, nil
+	}
+
+	// Never look for a default host system.
+	// A host system parameter is optional for vm creation. It uses a mandatory
+	// resource pool parameter to determine where the vm should be placed.
+	if flag.name == "" {
+		return nil, nil
+	}
+
+	finder, err := flag.Finder()
+	if err != nil {
+		return nil, err
+	}
+
+	flag.host, err = finder.HostSystem(context.TODO(), flag.name)
+	return flag.host, err
+}
+
+func (flag *HostSystemFlag) HostSystem() (*object.HostSystem, error) {
+	host, err := flag.HostSystemIfSpecified()
+	if err != nil {
+		return nil, err
+	}
+
+	if host != nil {
+		return host, nil
+	}
+
+	finder, err := flag.Finder()
+	if err != nil {
+		return nil, err
+	}
+
+	flag.host, err = finder.DefaultHostSystem(context.TODO())
+	return flag.host, err
+}
+
+func (flag *HostSystemFlag) HostNetworkSystem() (*object.HostNetworkSystem, error) {
+	host, err := flag.HostSystem()
+	if err != nil {
+		return nil, err
+	}
+
+	return host.ConfigManager().NetworkSystem(context.TODO())
+}