/
builder.go
140 lines (112 loc) · 3.27 KB
/
builder.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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
/*
Copyright 2019 The OpenEBS Authors.
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 pclear
import (
"fmt"
"os/exec"
"reflect"
"runtime"
"strings"
"github.com/openebs/cstor-operators/pkg/zcmd/bin"
"github.com/pkg/errors"
)
const (
// Operation defines type of zfs operation
Operation = "clear"
)
//PoolClear defines structure for pool 'Clear' operation
type PoolClear struct {
// pool name
Pool string
// vdev list
Vdev []string
// command string
Command string
// checks is list of predicate function used for validating object
checks []PredicateFunc
// error
err error
// Executor is to execute the commands
Executor bin.Executor
}
// NewPoolClear returns new instance of object PoolClear
func NewPoolClear() *PoolClear {
return &PoolClear{}
}
// WithCheck add given check to checks list
func (p *PoolClear) WithCheck(check ...PredicateFunc) *PoolClear {
p.checks = append(p.checks, check...)
return p
}
// WithPool method fills the Pool field of PoolClear object.
func (p *PoolClear) WithPool(Pool string) *PoolClear {
p.Pool = Pool
return p
}
// WithVdev method fills the Vdev field of PoolClear object.
func (p *PoolClear) WithVdev(vdev string) *PoolClear {
p.Vdev = append(p.Vdev, vdev)
return p
}
// WithCommand method fills the Command field of PoolClear object.
func (p *PoolClear) WithCommand(Command string) *PoolClear {
p.Command = Command
return p
}
// WithExecutor method fills the Executor field of PoolClear object.
func (p *PoolClear) WithExecutor(executor bin.Executor) *PoolClear {
p.Executor = executor
return p
}
// Validate is to validate generated PoolClear object by builder
func (p *PoolClear) Validate() *PoolClear {
for _, check := range p.checks {
if !check(p) {
p.err = errors.Wrapf(p.err, "validation failed {%v}", runtime.FuncForPC(reflect.ValueOf(check).Pointer()).Name())
}
}
return p
}
// Execute is to execute generated PoolClear object
func (p *PoolClear) Execute() ([]byte, error) {
p, err := p.Build()
if err != nil {
return nil, err
}
if IsExecutorSet()(p) {
return p.Executor.Execute(p.Command)
}
// execute command here
// #nosec
return exec.Command(bin.BASH, "-c", p.Command).CombinedOutput()
}
// Build returns the PoolClear object generated by builder
func (p *PoolClear) Build() (*PoolClear, error) {
var c strings.Builder
p = p.Validate()
p.appendCommand(&c, bin.ZPOOL)
p.appendCommand(&c, fmt.Sprintf(" %s ", Operation))
p.appendCommand(&c, p.Pool)
for _, v := range p.Vdev {
p.appendCommand(&c, fmt.Sprintf(" %s ", v))
}
p.Command = c.String()
return p, p.err
}
// appendCommand append string to given string builder
func (p *PoolClear) appendCommand(c *strings.Builder, cmd string) {
_, err := c.WriteString(cmd)
if err != nil {
p.err = errors.Wrapf(p.err, "Failed to append cmd{%s} : %s", cmd, err.Error())
}
}