forked from grpc-ecosystem/protoc-gen-grpc-gateway-ts
/
generator.go
132 lines (111 loc) · 4.12 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
package generator
import (
"bytes"
"fmt"
"path/filepath"
"strings"
"text/template"
plugin "github.com/golang/protobuf/protoc-gen-go/plugin"
log "github.com/sirupsen/logrus" // nolint: depguard
"github.com/BeProductable/protoc-gen-grpc-gateway-ts/data"
"github.com/BeProductable/protoc-gen-grpc-gateway-ts/registry"
"github.com/pkg/errors"
)
// TypeScriptGRPCGatewayGenerator is the protobuf generator for typescript
type TypeScriptGRPCGatewayGenerator struct {
Registry *registry.Registry
// EnableStylingCheck enables both eslint and tsc check for the generated code
// This option will only turn on in integration test to ensure the readability in
// the generated code.
EnableStylingCheck bool
}
const (
// EnableStylingCheckOption is the option name for EnableStylingCheck
EnableStylingCheckOption = "enable_styling_check"
)
// New returns an initialised generator
func New(paramsMap map[string]string) (*TypeScriptGRPCGatewayGenerator, error) {
registry, err := registry.NewRegistry(paramsMap)
if err != nil {
return nil, errors.Wrap(err, "error instantiating a new registry")
}
enableStylingCheck := false
enableStylingCheckVal, ok := paramsMap[EnableStylingCheckOption]
if ok {
// default to true if not disabled specifi
enableStylingCheck = enableStylingCheckVal == "true"
}
return &TypeScriptGRPCGatewayGenerator{
Registry: registry,
EnableStylingCheck: enableStylingCheck,
}, nil
}
// Generate take a code generator request and returns a response. it analyse request with registry and use the generated data to render ts files
func (t *TypeScriptGRPCGatewayGenerator) Generate(req *plugin.CodeGeneratorRequest) (*plugin.CodeGeneratorResponse, error) {
resp := &plugin.CodeGeneratorResponse{}
filesData, err := t.Registry.Analyse(req)
if err != nil {
return nil, errors.Wrap(err, "error analysing proto files")
}
tmpl := GetTemplate(t.Registry)
log.Debugf("files to generate %v", req.GetFileToGenerate())
needToGenerateFetchModule := false
// feed fileData into rendering process
for _, fileData := range filesData {
fileData.EnableStylingCheck = t.EnableStylingCheck
if !t.Registry.IsFileToGenerate(fileData.Name) {
log.Debugf("file %s is not the file to generate, skipping", fileData.Name)
continue
}
log.Debugf("generating file for %s", fileData.TSFileName)
generated, err := t.generateFile(fileData, tmpl)
if err != nil {
return nil, errors.Wrap(err, "error generating file")
}
resp.File = append(resp.File, generated)
needToGenerateFetchModule = needToGenerateFetchModule || fileData.Services.NeedsFetchModule()
}
if needToGenerateFetchModule {
// generate fetch module
fetchTmpl := GetFetchModuleTemplate()
log.Debugf("generate fetch template")
generatedFetch, err := t.generateFetchModule(fetchTmpl)
if err != nil {
return nil, errors.Wrap(err, "error generating fetch module")
}
resp.File = append(resp.File, generatedFetch)
}
return resp, nil
}
func (t *TypeScriptGRPCGatewayGenerator) generateFile(fileData *data.File, tmpl *template.Template) (*plugin.CodeGeneratorResponse_File, error) {
w := bytes.NewBufferString("")
if fileData.IsEmpty() {
w.Write([]byte(fmt.Sprintln("export default {}")))
} else {
err := tmpl.Execute(w, fileData)
if err != nil {
return nil, errors.Wrapf(err, "error generating ts file for %s", fileData.Name)
}
}
fileName := fileData.TSFileName
content := strings.TrimSpace(w.String())
return &plugin.CodeGeneratorResponse_File{
Name: &fileName,
InsertionPoint: nil,
Content: &content,
}, nil
}
func (t *TypeScriptGRPCGatewayGenerator) generateFetchModule(tmpl *template.Template) (*plugin.CodeGeneratorResponse_File, error) {
w := bytes.NewBufferString("")
fileName := filepath.Join(t.Registry.FetchModuleDirectory, t.Registry.FetchModuleFilename)
err := tmpl.Execute(w, &data.File{EnableStylingCheck: t.EnableStylingCheck})
if err != nil {
return nil, errors.Wrapf(err, "error generating fetch module at %s", fileName)
}
content := strings.TrimSpace(w.String())
return &plugin.CodeGeneratorResponse_File{
Name: &fileName,
InsertionPoint: nil,
Content: &content,
}, nil
}