-
Notifications
You must be signed in to change notification settings - Fork 0
/
messagemaps.go
90 lines (77 loc) · 2.27 KB
/
messagemaps.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
// Copyright 2022 Google LLC
//
// 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
//
// https://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 messagemaps
import (
"flag"
"fmt"
"io"
"os"
"google.golang.org/genproto/googleapis/api/annotations"
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/types/pluginpb"
)
var (
Flags flag.FlagSet
outFile *string
resourcesOnly *bool
)
func init() {
outFile = Flags.String("out_file", "", "")
resourcesOnly = Flags.Bool("resources_only", false, "")
}
func Analyze(plugin *protogen.Plugin) error {
plugin.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
var out io.Writer
if f := *outFile; f != "" {
file, err := os.OpenFile(f, os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
defer file.Close()
out = file
} else {
out = os.Stderr
}
w := func(f string, args ...any) {
out.Write([]byte(fmt.Sprintf(f, args...) + "\n"))
}
for _, file := range plugin.Files {
if !file.Generate {
continue
}
messages := collectMessages(file.Messages)
for _, r := range messages {
for _, f := range r.Fields {
d := f.Desc
if !d.IsMap() || d.MapValue().Kind() != protoreflect.MessageKind {
continue
}
w("%s: map with message value type %q", d.FullName(), d.MapValue().Message().FullName())
}
}
}
return nil
}
func collectMessages(messages []*protogen.Message) (resources []*protogen.Message) {
for _, m := range messages {
res := (proto.GetExtension(m.Desc.Options(), annotations.E_Resource)).(*annotations.ResourceDescriptor)
if !*resourcesOnly || res.GetType() != "" {
resources = append(resources, m)
}
resources = append(resources, collectMessages(m.Messages)...)
}
return
}