Clean errors (#1019)

* cmd/upgrade add proto-gen-go-errors
modify proto-gen-go-errors template and go.mod

* modify proto-gen-go-errors version and clean code

cmd/kratos/internal/upgrade/upgrade.go

@@ -21,6 +21,7 @@ func Run(cmd *cobra.Command, args []string) {
 	err := base.GoGet(
 		"github.com/go-kratos/kratos/cmd/kratos/v2",
 		"github.com/go-kratos/kratos/cmd/protoc-gen-go-http/v2",
+		"github.com/go-kratos/kratos/cmd/protoc-gen-go-errors/v2",
 		"google.golang.org/protobuf/cmd/protoc-gen-go",
 		"google.golang.org/grpc/cmd/protoc-gen-go-grpc",
 	)

cmd/protoc-gen-go-errors/go.mod

@@ -3,6 +3,6 @@ module github.com/go-kratos/kratos/cmd/protoc-gen-go-errors/v2
 go 1.15
 
 require (
-	github.com/go-kratos/kratos/v2 v2.0.0-20210608032802-c551448bbd64
+	github.com/go-kratos/kratos/v2 v2.0.0-20210608085308-7585257f9ea1
 	google.golang.org/protobuf v1.26.0
 )

cmd/protoc-gen-go-errors/go.sum

@@ -12,6 +12,8 @@ github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7
 github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
 github.com/go-kratos/kratos/v2 v2.0.0-20210608032802-c551448bbd64 h1:+x/Zgv46tYhyhdWgoASZRWQpwuaEoHtNz0PMfwT9svM=
 github.com/go-kratos/kratos/v2 v2.0.0-20210608032802-c551448bbd64/go.mod h1:puDEhRv+dqKa4ZdlInEAbO8ibGxqNhAXFjGleIRh9V4=
+github.com/go-kratos/kratos/v2 v2.0.0-20210608085308-7585257f9ea1 h1:t6O9azVp+Go2H1B5X9xEFgMj5jogpaL0obRz14ek+B0=
+github.com/go-kratos/kratos/v2 v2.0.0-20210608085308-7585257f9ea1/go.mod h1:puDEhRv+dqKa4ZdlInEAbO8ibGxqNhAXFjGleIRh9V4=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
 github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=

cmd/protoc-gen-go-errors/main.go

@@ -7,7 +7,7 @@ import (
 	"google.golang.org/protobuf/types/pluginpb"
 )
 
-const version = "v2.0.0-beta2"
+const version = "v2.0.0-rc1"
 
 func main() {
 	showVersion := flag.Bool("version", false, "print the version and exit")
@@ -17,7 +17,6 @@ func main() {
 		fmt.Printf("protoc-gen-go-errors %v\n", version)
 		return
 	}
-	//fmt.Println(os.Args, "123123")
 	var flags flag.FlagSet
 	protogen.Options{
 		ParamFunc: flags.Set,

cmd/protoc-gen-go-errors/template.go

@@ -10,10 +10,7 @@ var errorsTemplate = `
 
 func Is{{.CamelValue}}(err error) bool {
 	e := errors.FromError(err)
-	if e.Reason == {{.Name}}_{{.Value}}.String() && e.Code == {{.HttpCode}} {
-		return true
-	}
-	return false
+	return e.Reason == {{.Name}}_{{.Value}}.String() && e.Code == {{.HttpCode}} 
 }
 
 func Error{{.CamelValue}}(format string, args ...interface{}) *errors.Error {