refactor: remove config package from dubbogo-cli sample generator (#3218)

* refactor: remove config package from dubbogo-cli sample generator

- Migrate sample generator from config-based to programmatic API
- Update client template to use client.NewClient()
- Update server template to use server.NewServer()
- Remove conf/dubbogo.yaml configuration files
- Disable config file generation (comment out init() in gen_c_conf.go and gen_s_conf.go)
- Fix import order to match project standards
- Handle license suffix in constants.go using strings.TrimSuffix
- Update README.md and README_CN.md documentation

* fix: format constants.go imports to use multi-line style

* fix: move licenseForTemplates to var to allow function call

* fix: add blank line between license and generated code in api files

* fix: add blank line between license and proto file content

* fix: add blank line between license and generated code

Fix test failures by adding blank lines between the license header
and the generated code content in all template files:

- api.go: Add blank line at beginning of apiFile constant
- api_tripe.go: Add blank line at beginning of apiTripleFile constant
- proto.go: Add blank line at beginning of protoFile constant
- gen_client.go: Add blank line at beginning of clientCode constant and
  add newline separator in concatenation
- gen_server.go: Add blank line at beginning of serverCode constant and
  add newline separator in concatenation

All tests now pass with these changes.

Author: CAICAIIs

tools/dubbogo-cli/README.md

@@ -105,15 +105,11 @@ The Demo uses the direct connection mode, without relying on the registration ce
 │   ├── samples_api.proto
 │   └── samples_api_triple.pb.go
 ├── go-client
-│   ├── cmd
-│   │   └── client.go
-│   └── conf
-│       └── dubbogo.yaml
+│   └── cmd
+│       └── client.go
 ├── go-server
-│   ├── cmd
-│   │   └── server.go
-│   └── conf
-│       └── dubbogo.yaml
+│   └── cmd
+│       └── server.go
 └── go.mod
 ```
 

tools/dubbogo-cli/README_CN.md

@@ -109,15 +109,11 @@ dubbogo-cli newDemo .
 │   ├── samples_api.proto
 │   └── samples_api_triple.pb.go
 ├── go-client
-│   ├── cmd
-│   │   └── client.go
-│   └── conf
-│       └── dubbogo.yaml
+│   └── cmd
+│       └── client.go
 ├── go-server
-│   ├── cmd
-│   │   └── server.go
-│   └── conf
-│       └── dubbogo.yaml
+│   └── cmd
+│       └── server.go
 └── go.mod
 ```
 

tools/dubbogo-cli/cmd/testGenCode/template/newDemo/go-client/cmd/client.go

@@ -26,25 +26,29 @@ import (
 )
 
 import (
+	"dubbo.apache.org/dubbo-go/v3/client"
 	"dubbo.apache.org/dubbo-go/v3/common/logger"
-	"dubbo.apache.org/dubbo-go/v3/config"
 	_ "dubbo.apache.org/dubbo-go/v3/imports"
 )
 
-var grpcGreeterImpl = new(api.GreeterClientImpl)
-
-// export DUBBO_GO_CONFIG_PATH= PATH_TO_SAMPLES/helloworld/go-client/conf/dubbogo.yaml
 func main() {
-	config.SetConsumerService(grpcGreeterImpl)
-	if err := config.Load(); err != nil {
+	cli, err := client.NewClient(
+		client.WithClientURL("tri://localhost:20000"),
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	greeterClient, err := api.NewGreeterClient(cli)
+	if err != nil {
 		panic(err)
 	}
 
 	logger.Info("start to test dubbo")
 	req := &api.HelloRequest{
 		Name: "laurence",
 	}
-	reply, err := grpcGreeterImpl.SayHello(context.Background(), req)
+	reply, err := greeterClient.SayHello(context.Background(), req)
 	if err != nil {
 		logger.Error(err)
 	}

tools/dubbogo-cli/cmd/testGenCode/template/newDemo/go-client/conf/dubbogo.yaml

@@ -27,8 +27,9 @@ import (
 
 import (
 	"dubbo.apache.org/dubbo-go/v3/common/logger"
-	"dubbo.apache.org/dubbo-go/v3/config"
 	_ "dubbo.apache.org/dubbo-go/v3/imports"
+	"dubbo.apache.org/dubbo-go/v3/protocol"
+	"dubbo.apache.org/dubbo-go/v3/server"
 )
 
 type GreeterProvider struct {
@@ -40,11 +41,22 @@ func (s *GreeterProvider) SayHello(ctx context.Context, in *api.HelloRequest) (*
 	return &api.User{Name: "Hello " + in.Name, Id: "12345", Age: 21}, nil
 }
 
-// export DUBBO_GO_CONFIG_PATH= PATH_TO_SAMPLES/helloworld/go-server/conf/dubbogo.yaml
 func main() {
-	config.SetProviderService(&GreeterProvider{})
-	if err := config.Load(); err != nil {
+	srv, err := server.NewServer(
+		server.WithServerProtocol(
+			protocol.WithPort(20000),
+			protocol.WithTriple(),
+		),
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	if err := api.RegisterGreeterServer(srv, &GreeterProvider{}); err != nil {
+		panic(err)
+	}
+
+	if err := srv.Serve(); err != nil {
 		panic(err)
 	}
-	select {}
 }

tools/dubbogo-cli/cmd/testGenCode/template/newDemo/go-server/cmd/server.go

@@ -17,6 +17,10 @@
 
 package sample
 
+import (
+	"strings"
+)
+
 const (
 	license = `/*
  * Licensed to the Apache Software Foundation (ASF) under one or more
@@ -33,7 +37,7 @@ const (
  * 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.
- */
-
-`
+ */`
 )
+
+var licenseForTemplates = strings.TrimSuffix(license, " \n")

tools/dubbogo-cli/cmd/testGenCode/template/newDemo/go-server/conf/dubbogo.yaml

@@ -42,10 +42,12 @@ dubbo:
         interface: "" # read from pb`
 )
 
-func init() {
-	fileMap["clientConfigFile"] = &fileGenerator{
-		path:    "./go-client/conf",
-		file:    "dubbogo.yaml",
-		context: clientConfigFile,
-	}
-}
+// Config files are no longer needed in the new config-free pattern
+// The client now uses programmatic configuration via client.NewClient()
+// func init() {
+// 	fileMap["clientConfigFile"] = &fileGenerator{
+// 		path:    "./go-client/conf",
+// 		file:    "dubbogo.yaml",
+// 		context: clientConfigFile,
+// 	}
+// }