forked from vmware/govmomi
/
datastore.go
146 lines (113 loc) · 3.14 KB
/
datastore.go
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/*
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) Args(args []string) []object.DatastorePath {
var files []object.DatastorePath
for _, arg := range args {
var p object.DatastorePath
if p.FromString(arg) {
f.Name = p.Datastore
} else {
p.Datastore = f.Name
p.Path = arg
}
files = append(files, p)
}
return files
}
func (f *DatastoreFlag) Datastore() (*object.Datastore, error) {
if f.ds != nil {
return f.ds, nil
}
var p object.DatastorePath
if p.FromString(f.Name) {
// Example use case:
// -ds "$(govc object.collect -s vm/foo config.files.logDirectory)"
f.Name = p.Datastore
}
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)
}