121 lines
2.7 KiB
Go
121 lines
2.7 KiB
Go
/*
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Copyright (c) 2014-2016 VMware, Inc. All Rights Reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package flags
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import (
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"context"
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"flag"
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"fmt"
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"os"
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"github.com/vmware/govmomi/object"
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"github.com/vmware/govmomi/vim25/types"
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)
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type DatastoreFlag struct {
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common
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*DatacenterFlag
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Name string
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ds *object.Datastore
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}
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var datastoreFlagKey = flagKey("datastore")
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// NewCustomDatastoreFlag creates and returns a new DatastoreFlag without
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// trying to retrieve an existing one from the specified context.
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func NewCustomDatastoreFlag(ctx context.Context) (*DatastoreFlag, context.Context) {
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v := &DatastoreFlag{}
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v.DatacenterFlag, ctx = NewDatacenterFlag(ctx)
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return v, ctx
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}
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func NewDatastoreFlag(ctx context.Context) (*DatastoreFlag, context.Context) {
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if v := ctx.Value(datastoreFlagKey); v != nil {
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return v.(*DatastoreFlag), ctx
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}
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v, ctx := NewCustomDatastoreFlag(ctx)
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ctx = context.WithValue(ctx, datastoreFlagKey, v)
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return v, ctx
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}
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func (f *DatastoreFlag) Register(ctx context.Context, fs *flag.FlagSet) {
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f.RegisterOnce(func() {
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f.DatacenterFlag.Register(ctx, fs)
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env := "GOVC_DATASTORE"
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value := os.Getenv(env)
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usage := fmt.Sprintf("Datastore [%s]", env)
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fs.StringVar(&f.Name, "ds", value, usage)
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})
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}
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func (f *DatastoreFlag) Process(ctx context.Context) error {
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return f.ProcessOnce(func() error {
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if err := f.DatacenterFlag.Process(ctx); err != nil {
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return err
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}
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return nil
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})
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}
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func (f *DatastoreFlag) Datastore() (*object.Datastore, error) {
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if f.ds != nil {
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return f.ds, nil
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}
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finder, err := f.Finder()
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if err != nil {
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return nil, err
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}
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if f.ds, err = finder.DatastoreOrDefault(context.TODO(), f.Name); err != nil {
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return nil, err
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}
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return f.ds, nil
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}
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func (flag *DatastoreFlag) DatastoreIfSpecified() (*object.Datastore, error) {
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if flag.Name == "" {
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return nil, nil
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}
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return flag.Datastore()
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}
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func (f *DatastoreFlag) DatastorePath(name string) (string, error) {
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ds, err := f.Datastore()
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if err != nil {
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return "", err
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}
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return ds.Path(name), nil
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}
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func (f *DatastoreFlag) Stat(ctx context.Context, file string) (types.BaseFileInfo, error) {
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ds, err := f.Datastore()
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if err != nil {
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return nil, err
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}
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return ds.Stat(ctx, file)
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}
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