-
Notifications
You must be signed in to change notification settings - Fork 0
/
main.go
165 lines (148 loc) · 4.03 KB
/
main.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
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
package main
import (
"flag"
"fmt"
"os"
"strings"
"google.golang.org/protobuf/compiler/protogen"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/types/pluginpb"
)
func main() {
var flagTemplate string
flags := flag.NewFlagSet("", flag.ExitOnError)
flags.StringVar(&flagTemplate, "template", flagTemplate, "template")
protogen.Options{ParamFunc: flags.Set}.Run(func(gen *protogen.Plugin) error {
if err := InitFormat(flagTemplate); err != nil {
return err
}
// https://github.com/protocolbuffers/protobuf/blob/main/docs/implementing_proto3_presence.md
gen.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL)
for _, protoFile := range gen.Files {
if protoFile.Generate {
if err := Generate(gen, protoFile); err != nil {
fmt.Fprintf(os.Stderr, "Error: %v\n", err)
}
}
}
return nil
})
}
func Generate(gen *protogen.Plugin, protoFile *protogen.File) error {
if !HasOneof(protoFile.Messages) {
return nil
}
filename := protoFile.GeneratedFilenamePrefix + "_oneof.pb.go"
g := gen.NewGeneratedFile(filename, protoFile.GoImportPath)
code, err := Format(NewModel(gen, protoFile, g))
if err != nil {
return err
}
g.P(code)
return nil
}
func HasOneof(messages []*protogen.Message) bool {
for _, m := range messages {
if hasOneof(m) {
return true
}
}
return false
}
func hasOneof(m *protogen.Message) bool {
for _, o := range m.Oneofs {
if !o.Desc.IsSynthetic() {
return true
}
}
return HasOneof(m.Messages)
}
func NewModel(gen *protogen.Plugin, protoFile *protogen.File, g *protogen.GeneratedFile) *Model {
return &Model{
Versions: Versions{
ProtocGenGoOneof: version,
Protoc: VersionString(gen.Request.CompilerVersion),
},
Source: protoFile.GeneratedFilenamePrefix + ".proto",
Package: string(protoFile.GoPackageName),
Oneofs: NewOneofs(gen, protoFile, g, protoFile.Messages),
}
}
func VersionString(v *pluginpb.Version) string {
if v == nil || (v.Major == nil && v.Minor == nil && v.Patch == nil && v.Suffix == nil) {
return "(unknown)"
}
var (
major = v.GetMajor()
minor = v.GetMinor()
patch = v.GetPatch()
suffix = v.GetSuffix()
)
return fmt.Sprintf("%d.%d.%d%s", major, minor, patch, suffix)
}
func NewOneofs(gen *protogen.Plugin, protoFile *protogen.File, g *protogen.GeneratedFile, messages []*protogen.Message) []*Oneof {
var list []*Oneof
for _, m := range messages {
list = append(list, NewOneofsMessage(gen, protoFile, g, m)...)
list = append(list, NewOneofs(gen, protoFile, g, m.Messages)...)
}
return list
}
func NewOneofsMessage(gen *protogen.Plugin, protoFile *protogen.File, g *protogen.GeneratedFile, m *protogen.Message) []*Oneof {
var list []*Oneof
for _, o := range m.Oneofs {
if o.Desc.IsSynthetic() { // excludes optional
continue
}
oneof := &Oneof{
Name: string(o.Desc.Name()),
Parent: m.GoIdent.GoName,
FullName: strings.ReplaceAll(o.GoIdent.GoName, "_", ""),
Interface: "is" + o.GoIdent.GoName,
Fields: NewFields(gen, protoFile, g, m, o),
}
list = append(list, oneof)
}
return list
}
func NewFields(gen *protogen.Plugin, protoFile *protogen.File, g *protogen.GeneratedFile, m *protogen.Message, o *protogen.Oneof) []*Field {
var list []*Field
for _, f := range o.Fields {
field := &Field{
Name: string(f.Desc.Name()),
GoName: f.GoName,
Type: TypeOf(g, f),
Struct: f.GoIdent.GoName,
}
list = append(list, field)
}
return list
}
func TypeOf(g *protogen.GeneratedFile, f *protogen.Field) string {
if f.Desc.Kind() == protoreflect.MessageKind {
return "*" + g.QualifiedGoIdent(f.Message.GoIdent)
}
if f.Desc.Kind() == protoreflect.EnumKind {
return g.QualifiedGoIdent(f.Enum.GoIdent)
}
ident := f.Desc.Kind().String()
switch ident {
case "float":
return "float32"
case "double":
return "float64"
case "sint32":
return "int32"
case "sint64":
return "int64"
case "fixed32":
return "uint32"
case "fixed64":
return "uint64"
case "sfixed32":
return "int32"
case "sfixed64":
return "int64"
}
return ident
}