forked from tw4dl/libretto
/
datacenter.go
98 lines (77 loc) · 2.27 KB
/
datacenter.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
/*
Copyright (c) 2014 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 (
"flag"
"fmt"
"os"
"sync"
"github.com/apcera/libretto/Godeps/_workspace/src/github.com/vmware/govmomi/find"
"github.com/apcera/libretto/Godeps/_workspace/src/github.com/vmware/govmomi/object"
"github.com/apcera/libretto/Godeps/_workspace/src/golang.org/x/net/context"
)
type DatacenterFlag struct {
*ClientFlag
*OutputFlag
register sync.Once
path string
dc *object.Datacenter
finder *find.Finder
err error
}
func (flag *DatacenterFlag) Register(f *flag.FlagSet) {
flag.register.Do(func() {
env := "GOVC_DATACENTER"
value := os.Getenv(env)
usage := fmt.Sprintf("Datacenter [%s]", env)
f.StringVar(&flag.path, "dc", value, usage)
})
}
func (flag *DatacenterFlag) Process() error { return nil }
func (flag *DatacenterFlag) Finder() (*find.Finder, error) {
if flag.finder != nil {
return flag.finder, nil
}
c, err := flag.Client()
if err != nil {
return nil, err
}
finder := find.NewFinder(c, flag.JSON)
// Datacenter is not required (ls command for example).
// Set for relative func if dc flag is given or
// if there is a single (default) Datacenter
if flag.path == "" {
flag.dc, flag.err = finder.DefaultDatacenter(context.TODO())
} else {
if flag.dc, err = finder.Datacenter(context.TODO(), flag.path); err != nil {
return nil, err
}
}
finder.SetDatacenter(flag.dc)
flag.finder = finder
return flag.finder, nil
}
func (flag *DatacenterFlag) Datacenter() (*object.Datacenter, error) {
if flag.dc != nil {
return flag.dc, nil
}
_, err := flag.Finder()
if err != nil {
return nil, err
}
if flag.err != nil {
// Should only happen if no dc is specified and len(dcs) > 1
return nil, flag.err
}
return flag.dc, err
}