/
printer.go
88 lines (75 loc) · 2.21 KB
/
printer.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
// Copyright 2021 The etcd 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 etcdutl
import (
"errors"
"fmt"
"github.com/spf13/cobra"
"go.etcd.io/etcd/etcdutl/v3/snapshot"
"go.etcd.io/etcd/pkg/v3/cobrautl"
"github.com/dustin/go-humanize"
)
var (
OutputFormat string
)
type printer interface {
DBStatus(snapshot.Status)
}
func NewPrinter(printerType string) printer {
switch printerType {
case "simple":
return &simplePrinter{}
case "fields":
return &fieldsPrinter{newPrinterUnsupported("fields")}
case "json":
return newJSONPrinter()
case "protobuf":
return newPBPrinter()
case "table":
return &tablePrinter{newPrinterUnsupported("table")}
}
return nil
}
type printerRPC struct {
printer
p func(interface{})
}
type printerUnsupported struct{ printerRPC }
func newPrinterUnsupported(n string) printer {
f := func(interface{}) {
cobrautl.ExitWithError(cobrautl.ExitBadFeature, errors.New(n+" not supported as output format"))
}
return &printerUnsupported{printerRPC{nil, f}}
}
func (p *printerUnsupported) DBStatus(snapshot.Status) { p.p(nil) }
func makeDBStatusTable(ds snapshot.Status) (hdr []string, rows [][]string) {
hdr = []string{"hash", "revision", "total keys", "total size"}
rows = append(rows, []string{
fmt.Sprintf("%x", ds.Hash),
fmt.Sprint(ds.Revision),
fmt.Sprint(ds.TotalKey),
humanize.Bytes(uint64(ds.TotalSize)),
})
return hdr, rows
}
func initPrinterFromCmd(cmd *cobra.Command) (p printer) {
outputType, err := cmd.Flags().GetString("write-out")
if err != nil {
cobrautl.ExitWithError(cobrautl.ExitError, err)
}
if p = NewPrinter(outputType); p == nil {
cobrautl.ExitWithError(cobrautl.ExitBadFeature, errors.New("unsupported output format"))
}
return p
}