summaryrefslogtreecommitdiffstats
path: root/extras/hs-test/main.go
blob: 9de0d314cb2bab8f13f75d82792a9cc701e8026a (plain)
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
141
142
143
144
145
146
147
148
149
150
151
package main

import (
	"context"
	"encoding/json"
	"fmt"
	"os"
	"os/exec"
	"os/signal"
	"reflect"
)

var actions Actions

func newVppContext() (context.Context, context.CancelFunc) {
	ctx, cancel := signal.NotifyContext(
		context.Background(),
		os.Interrupt,
	)
	return ctx, cancel
}

func Vppcli(runDir, command string) (string, error) {
	cmd := exec.Command("vppctl", "-s", fmt.Sprintf("%s/var/run/vpp/cli.sock", runDir), command)
	o, err := cmd.CombinedOutput()
	if err != nil {
		fmt.Printf("failed to execute command: '%v'.\n", err)
	}
	fmt.Printf("Command output %s", string(o))
	return string(o), err
}

func exitOnErrCh(ctx context.Context, cancel context.CancelFunc, errCh <-chan error) {
	// If we already have an error, log it and exit
	select {
	case err := <-errCh:
		fmt.Printf("%v", err)
	default:
	}
	go func(ctx context.Context, errCh <-chan error) {
		<-errCh
		cancel()
	}(ctx, errCh)
}

func writeSyncFile(res *ActionResult) error {
	syncFile := "/tmp/sync/rc"

	var jsonRes JsonResult

	jsonRes.ErrOutput = res.ErrOutput
	jsonRes.StdOutput = res.StdOutput
	if res.Err != nil {
		jsonRes.Code = 1
		jsonRes.Desc = fmt.Sprintf("%s :%v", res.Desc, res.Err)
	} else {
		jsonRes.Code = 0
	}

	str, err := json.Marshal(jsonRes)
	if err != nil {
		return fmt.Errorf("error marshaling json result data! %v", err)
	}

	_, err = os.Open(syncFile)
	if err != nil {
		// expecting the file does not exist
		f, e := os.Create(syncFile)
		if e != nil {
			return fmt.Errorf("failed to open sync file")
		}
		defer f.Close()
		f.Write([]byte(str))
	} else {
		return fmt.Errorf("sync file exists, delete the file first")
	}
	return nil
}

func NewActionResult(err error, opts ...ActionResultOptionFn) *ActionResult {
	res := &ActionResult{
		Err: err,
	}
	for _, o := range opts {
		o(res)
	}
	return res
}

type ActionResultOptionFn func(res *ActionResult)

func ActionResultWithDesc(s string) ActionResultOptionFn {
	return func(res *ActionResult) {
		res.Desc = s
	}
}

func ActionResultWithStderr(s string) ActionResultOptionFn {
	return func(res *ActionResult) {
		res.ErrOutput = s
	}
}

func ActionResultWithStdout(s string) ActionResultOptionFn {
	return func(res *ActionResult) {
		res.StdOutput = s
	}
}

func OkResult() *ActionResult {
	return NewActionResult(nil)
}

func processArgs() *ActionResult {
	nArgs := len(os.Args) - 1 // skip program name
	if nArgs < 1 {
		return NewActionResult(fmt.Errorf("internal: no action specified!"))
	}
	action := os.Args[1]
	methodValue := reflect.ValueOf(&actions).MethodByName(action)
	if !methodValue.IsValid() {
		return NewActionResult(fmt.Errorf("internal unknown action %s!", action))
	}
	methodIface := methodValue.Interface()
	fn := methodIface.(func([]string) *ActionResult)
	return fn(os.Args)
}

func main() {
	if len(os.Args) == 0 {
		fmt.Println("args required")
		return
	}

	if os.Args[1] == "rm" {
		topology, err := LoadTopology(TopologyDir, os.Args[2])
		if err != nil {
			fmt.Printf("falied to load topologies: %v\n", err)
			os.Exit(1)
		}
		topology.Unconfigure()
		os.Exit(0)
	}

	var err error
	res := processArgs()
	err = writeSyncFile(res)
	if err != nil {
		fmt.Printf("failed to write to sync file: %v\n", err)
	}
}