-
Notifications
You must be signed in to change notification settings - Fork 3
/
util.go
111 lines (97 loc) · 2.91 KB
/
util.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
// Copyright © 2020 The Things Network Foundation, The Things Industries B.V.
//
// 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 cmd
import (
"bufio"
"fmt"
"io"
"os"
"strings"
"go.thethings.network/lorawan-stack-migrate/pkg/source"
"go.thethings.network/lorawan-stack/v3/pkg/errors"
"go.thethings.network/lorawan-stack/v3/pkg/jsonpb"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
)
func toJSON(dev *ttnpb.EndDevice) ([]byte, error) {
return jsonpb.TTN().Marshal(dev)
}
var (
errExport = errors.Define("export", "export device `{device}`")
errFormat = errors.DefineCorruption("format", "format device `{device}`")
)
func exportDev(s source.Source, devEui string) error {
dev, err := s.ExportDevice(devEui)
if err != nil {
return errExport.WithAttributes("device", devEui).WithCause(err)
}
b, err := toJSON(dev)
if err != nil {
return errFormat.WithAttributes("device", devEui).WithCause(err)
}
_, err = fmt.Fprintln(os.Stdout, string(b))
return err
}
// Iterator returns items
type Iterator interface {
// Next returns the next item from the iterator. io.EOF is returned when no more items are left.
Next() (item string, err error)
}
type listIterator struct {
items []string
index int
}
type readerIterator struct {
rd *bufio.Reader
sep byte
}
// NewListIterator returns a new iterator from a list of items.
func NewListIterator(items []string) Iterator {
return &listIterator{items: items}
}
func (l *listIterator) Next() (string, error) {
if l.index < len(l.items) {
l.index++
return l.items[l.index-1], nil
}
return "", io.EOF
}
// NewReaderIterator returns a new iterator from a reader.
func NewReaderIterator(rd io.Reader, sep byte) Iterator {
return &readerIterator{rd: bufio.NewReader(rd), sep: sep}
}
func (r *readerIterator) Next() (string, error) {
s, err := r.rd.ReadString(r.sep)
if err == io.EOF && s != "" {
return s, nil
}
return strings.Trim(s, string(r.sep)), err
}
// printStack prints the error stack to w.
func printStack(w io.Writer, err error) {
for i, err := range errors.Stack(err) {
if i == 0 {
fmt.Fprintln(w, err)
} else {
fmt.Fprintf(w, "--- %s\n", err)
}
for k, v := range errors.Attributes(err) {
fmt.Fprintf(os.Stderr, " %s=%v\n", k, v)
}
if ttnErr, ok := errors.From(err); ok {
if correlationID := ttnErr.CorrelationID(); correlationID != "" {
fmt.Fprintf(os.Stderr, " correlation_id=%s\n", ttnErr.CorrelationID())
}
}
}
}