-
Notifications
You must be signed in to change notification settings - Fork 0
/
generator.go
245 lines (208 loc) · 5.95 KB
/
generator.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
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
package goku
import (
"fmt"
"github.com/golang/protobuf/proto"
"github.com/v1990/protoc-gen-goku/descriptors"
"github.com/v1990/protoc-gen-goku/helper"
descriptorpb "google.golang.org/protobuf/types/descriptorpb"
pluginpb "google.golang.org/protobuf/types/pluginpb"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strconv"
"strings"
)
type Generator struct {
conf Config
params map[string]string
ctx *Context
request *pluginpb.CodeGeneratorRequest // The input.
response *pluginpb.CodeGeneratorResponse // The output.
// name: google/protobuf/empty.proto
filesByName map[string]*descriptors.FileDescriptorProto
// pb类型名称与实例的映射
// key: 完整的类型名称 .google.protobuf.FieldDescriptorProto.Label
// value: message(descriptorpb.DescriptorProto) or enum(descriptorpb.EnumDescriptorProto)
typesByName map[string]descriptors.ProtoType
debug bool
}
func NewGenerator() *Generator {
g := new(Generator)
g.params = make(map[string]string)
g.filesByName = make(map[string]*descriptors.FileDescriptorProto)
g.typesByName = make(map[string]descriptors.ProtoType)
g.ctx = newContext(g)
g.request = new(pluginpb.CodeGeneratorRequest)
g.response = new(pluginpb.CodeGeneratorResponse)
return g
}
func (g *Generator) Run(IN io.Reader, OUT io.Writer, ERR io.Writer) {
data, err := ioutil.ReadAll(IN)
g.FatalOnErr(err, "reading input")
err = proto.Unmarshal(data, g.request)
g.FatalOnErr(err, "parsing input proto")
if len(g.request.FileToGenerate) == 0 {
log.Fatalln("no files to generateFile")
}
g.parseParameters(g.request.GetParameter())
g.conf = g.getConfig()
g.logRequest(g.request)
// ==================================
g.wrapAllFiles(g.request.GetProtoFile())
g.initPlugins()
g.generateFiles(g.request.GetFileToGenerate())
// ==================================
data, err = proto.Marshal(g.response)
g.FatalOnErr(err, "failed to marshal output proto")
_, err = OUT.Write(data)
g.FatalOnErr(err, "failed to write output proto")
}
func (g *Generator) parseParameters(parameter string) {
for _, p := range strings.Split(parameter, ",") {
if i := strings.Index(p, "="); i < 0 {
g.params[p] = ""
} else {
g.params[p[0:i]] = p[i+1:]
}
}
for k, v := range g.params {
switch k {
case "debug":
g.debug, _ = strconv.ParseBool(v)
}
}
g.setDefaultParam("workPath", ".")
g.setDefaultParam("outPath", "")
g.setDefaultParam("templatePath", "templates")
g.setDefaultParam("conf", "goku.yaml")
}
func (g *Generator) wrapAllFiles(files []*descriptorpb.FileDescriptorProto) {
for _, f := range files {
if _, ok := g.filesByName[f.GetName()]; ok {
continue
}
file := descriptors.NewFileDescriptorProto(f)
g.filesByName[file.GetName()] = file
for _, m := range file.GetMessageType() {
g.recordType(m)
for _, mm := range m.GetNestedType() {
g.recordType(mm)
}
for _, mm := range m.GetEnumType() {
g.recordType(mm)
}
}
for _, m := range file.GetEnumType() {
g.recordType(m)
}
}
}
func (g *Generator) recordType(t descriptors.ProtoType) {
name := t.ProtoType().FullTypeName()
g.typesByName[name] = t
g.Debug("recordType: %-60s ==> [%T]%s", name, t, t.GetName())
}
func (g *Generator) GetObject(typeName string) descriptors.ProtoType {
return g.MustGetDescriptorByName(typeName)
}
func (g *Generator) GetFileByName(protoFileName string) *descriptors.FileDescriptorProto {
return g.filesByName[protoFileName]
}
// 通过protoc格式的名称 获取 proto 对象;
// @param typeName .google.protobuf.FileDescriptorProto
// @return
// - message: *descriptorpb.DescriptorProto
// - enum: *descriptorpb.EnumDescriptorProto
func (g *Generator) GetDescriptorByName(typeName string) descriptors.ProtoType {
return g.typesByName[typeName]
}
func (g *Generator) MustGetDescriptorByName(typeName string) descriptors.ProtoType {
if p := g.GetDescriptorByName(typeName); p != nil {
return p
}
g.Fatal("can not found type: %s", typeName)
return nil
}
func (g *Generator) initPlugins() {
for _, p := range plugins {
p.Init(g)
}
}
func (g *Generator) generateFiles(filenames []string) {
for _, filename := range filenames {
file := g.filesByName[filename]
g.generateFile(file)
}
}
// 输出文件
// See pluginpb.CodeGeneratorResponse_File
func (g *Generator) WriteOutFile(filename string, content []byte) error {
// 默认输出到 stderr
switch filename {
case "", "stderr", "stdin":
_, err := fmt.Fprint(os.Stderr, string(content))
return err
}
// 如果是 绝对路径: 直接写文件
if filepath.IsAbs(filename) {
if err := os.MkdirAll(filepath.Dir(filename), 0755); err != nil {
return err
}
if err := ioutil.WriteFile(filename, []byte(content), 0644); err != nil {
return err
}
return nil
}
if g.params["outPath"] != "" && !strings.HasPrefix(filename, g.params["outPath"]) {
filename = filepath.Join(g.params["outPath"], filename)
return g.WriteOutFile(filename, content)
}
// 写到 protoc 的 response
sContent := string(content)
outFile := &pluginpb.CodeGeneratorResponse_File{
Name: &filename,
InsertionPoint: nil,
Content: &sContent,
}
g.response.File = append(g.response.File, outFile)
return nil
}
func (g *Generator) populateCtx(ctx *Context) {
ctx.populate()
}
// See Context.Value
func (g *Generator) Value(key interface{}) interface{} {
switch k := key.(type) {
case string:
if v, ok := g.conf.Data[k]; ok {
return v
}
if v, ok := g.params[k]; ok {
return v
}
}
return nil
}
func (g *Generator) Param(key string, def string) string {
if v, ok := g.params[key]; ok {
return v
}
return def
}
func (g *Generator) setDefaultParam(key string, def string) string {
g.params[key] = g.Param(key, def)
return g.params[key]
}
func (g *Generator) logRequest(r *pluginpb.CodeGeneratorRequest) {
jsonStr := helper.ShowJSON(r, 3)
//jsonStr, err := (&jsonpb.Marshaler{
// Indent: " ",
//}).MarshalToString(r)
//if err != nil {
// return
//}
logFile := "request.json"
ioutil.WriteFile(logFile, []byte(jsonStr), 0644)
}