-
Notifications
You must be signed in to change notification settings - Fork 71
/
command_yq.go
139 lines (122 loc) · 2.97 KB
/
command_yq.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
package utils
// Borrowed from gojq - cli package
//
// The ability to do yaml processing is internal to gojq, so here
// we've copied in the nesessary bits to get the bare functionality.
// With this implementation, this subcommand will function much like
// yq: https://github.com/mikefarah/yq
//
// ref: https://github.com/itchyny/gojq/blob/main/cli/yaml.go
import (
"fmt"
"os"
"github.com/itchyny/gojq"
log "github.com/sirupsen/logrus"
"github.com/spf13/cobra"
yq "github.com/newrelic/newrelic-cli/internal/utils/yq"
)
var (
outputIndent = 2
)
var cmdYq = &cobra.Command{
Use: "yq",
Short: "Parse yaml strings",
Long: `Parse yaml strings
The yq subcommand makes use of gojq (https://github.com/itchyny/gojq) to provide
yaml parsing capabilities.
`,
Example: `echo '"foo": 128' | newrelic utils yq '.foo'`,
Args: func(cmd *cobra.Command, args []string) error {
if len(args) < 1 {
log.Fatalln("no filter string provided")
}
if !StdinExists() {
log.Fatalln("no input found")
}
return nil
},
Run: func(cmd *cobra.Command, args []string) {
query, err := gojq.Parse(args[0])
if err != nil {
log.Fatalln(err)
}
iter := yq.NewYAMLInputIter(os.Stdin, "<stdin>")
code, err := gojq.Compile(
query,
gojq.WithInputIter(iter),
)
if err != nil {
log.Fatalln(err)
}
err = process(iter, code)
if err != nil {
log.Fatalln(err)
}
},
}
// cli.process
// https://github.com/itchyny/gojq/blob/main/cli/cli.go#L337
func process(iter yq.InputIter, code *gojq.Code) error {
var err error
for {
v, ok := iter.Next()
if !ok {
return err
}
if er, ok := v.(error); ok {
printError(er)
err = &yq.EmptyError{Err: er}
// log.Fatalln(er) //todo ?
continue
}
// TODO: if er := cli.printValues(code.Run(v, cli.argvalues...)); er != nil {
if er := printValues(code.Run(v)); er != nil {
printError(er)
err = &yq.EmptyError{Err: er}
}
}
}
// cli.printValues
// https://github.com/itchyny/gojq/blob/main/cli/cli.go#L356
func printValues(iter gojq.Iter) error {
m := createMarshaler()
for {
v, ok := iter.Next()
if !ok {
break
}
if err, ok := v.(error); ok {
return err
}
if err := m.Marshal(v, os.Stdout); err != nil {
return err
}
}
return nil
}
// cli.printError
// https://github.com/itchyny/gojq/blob/main/cli/cli.go#L422
func printError(err error) {
if er, ok := err.(interface{ IsEmptyError() bool }); !ok || !er.IsEmptyError() {
if er, ok := err.(interface{ IsHaltError() bool }); !ok || !er.IsHaltError() {
fmt.Fprintf(os.Stderr, "%s: %s\n", "cmdYq", err)
} else if er, ok := err.(gojq.ValueError); ok {
v := er.Value()
if str, ok := v.(string); ok {
os.Stderr.Write([]byte(str))
} else {
bs, _ := gojq.Marshal(v)
os.Stderr.Write(bs)
os.Stderr.Write([]byte{'\n'})
}
}
}
}
// cli.createMarshaler
// https://github.com/itchyny/gojq/blob/main/cli/cli.go#L392
func createMarshaler() yq.Marshaler {
return yq.YamlFormatter(&outputIndent)
}
func init() {
Command.AddCommand(cmdYq)
}