Support json, text dump options

Author: uanid

README.md

@@ -15,13 +15,15 @@ go install github.com/pubg/protoc-gen-debug
 
 ## Example
 
-
 ### Dump protoc's input
 ```sh
 protoc \
     --debug_out=./ \
-    --debug_opt=dump_file=request.pb.bin \
-    --debug_opt=parameter=expose_all=true \
+    --debug_opt=dump_binary=true \
+    --debug_opt=dump_json=true \
+    --debug_opt=file_binary=request.pb.bin \
+    --debug_opt=file_json=request.pb.json \
+    --debug_opt=parameter=expose_all=true:foo=bar \
     -I ./ \
     ./example.proto
 ```
@@ -38,10 +40,16 @@ cat request.pb.bin | go run ./cmd/main.go
 1. Check `Redirect input from`
 2. Set dumped file path
 3. Run as Debug Mode
+4. Happy Debugging!
 
 ## Options
-| Option    | Description                           | Default        |
-|-----------|---------------------------------------|----------------|
-| dump_file | A file name to save protoc's input to | request.pb.bin |
-| parameter | Parameters for other plugins          | ""             |
+| Option      | Description                         | Type                   | Default         |
+|-------------|-------------------------------------|------------------------|-----------------|
+| dump_binary | Enable or not to dump binary format | bool                   | true            |
+| file_binary | File name to save protoc's input    | string                 | request.pb.bin  |
+| dump_json   | Enable or not to dump json format   | bool                   | false           |
+| file_json   | File name to save protoc's input    | string                 | request.pb.json |
+| dump_text   | Enable or not to dump text format   | bool                   | false           |
+| file_text   | File name to save protoc's input    | string                 | request.pb.txt  |
+| parameter   | Parameters for other plugins        | colon seperated string | ""              |
 

main.go

@@ -2,30 +2,76 @@ package main
 
 import (
 	"flag"
+	"strings"
 
 	"google.golang.org/protobuf/compiler/protogen"
+	"google.golang.org/protobuf/encoding/protojson"
+	"google.golang.org/protobuf/encoding/prototext"
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
+type PluginOptions struct {
+	DumpBinary bool
+	DumpJson   bool
+	DumpText   bool
+	FileBinary string
+	FileJson   string
+	FileText   string
+	Parameter  string
+}
+
 func main() {
 	var flags flag.FlagSet
 	opts := protogen.Options{
 		ParamFunc: flags.Set,
 	}
 
-	dumpFile := flags.String("dump_file", "request.pb.bin", `dump file path`)
-	parameter := flags.String("parameter", "", `parameter`)
+	options := PluginOptions{}
+	flags.BoolVar(&options.DumpBinary, "dump_binary", true, "Enable dump protobuf request as binary format")
+	flags.BoolVar(&options.DumpJson, "dump_json", false, "Enable dump protobuf request as json format")
+	flags.BoolVar(&options.DumpText, "dump_text", false, "Enable dump protobuf request as text format")
+	flags.StringVar(&options.FileBinary, "file_binary", "request.pb.bin", "binary file path")
+	flags.StringVar(&options.FileJson, "file_json", "request.pb.json", "json file path")
+	flags.StringVar(&options.FileText, "file_text", "request.pb.txt", "text file path")
+	flags.StringVar(&options.Parameter, "parameter", "", "parameter")
 
 	opts.Run(func(plugin *protogen.Plugin) error {
-		plugin.Request.Parameter = parameter
-		buf, err := proto.Marshal(plugin.Request)
-		if err != nil {
-			return err
+		normalizedParam := strings.Replace(options.Parameter, ":", ",", -1)
+		plugin.Request.Parameter = &normalizedParam
+
+		if options.DumpBinary {
+			buf, err := proto.Marshal(plugin.Request)
+			if err != nil {
+				return err
+			}
+			_, err = plugin.NewGeneratedFile(options.FileBinary, "").Write(buf)
+			if err != nil {
+				return err
+			}
+
 		}
-		_, err = plugin.NewGeneratedFile(*dumpFile, "").Write(buf)
-		if err != nil {
-			return err
+
+		if options.DumpJson {
+			buf, err := protojson.Marshal(plugin.Request)
+			if err != nil {
+				return err
+			}
+			_, err = plugin.NewGeneratedFile(options.FileJson, "").Write(buf)
+			if err != nil {
+				return err
+			}
+		}
+
+		if options.DumpText {
+			buf, err := prototext.Marshal(plugin.Request)
+			if err != nil {
+				return err
+			}
+			_, err = plugin.NewGeneratedFile(options.FileText, "").Write(buf)
+			if err != nil {
+				return err
+			}
 		}
 
 		plugin.SupportedFeatures = uint64(pluginpb.CodeGeneratorResponse_FEATURE_PROTO3_OPTIONAL) | uint64(pluginpb.CodeGeneratorResponse_FEATURE_SUPPORTS_EDITIONS)