reactor rpc (#179)

* reactor rpc generation

* update flag

* update command

* update command

* update unit test

* delete test file

* optimize code

* update doc

* update gen pb

* rename target dir

* update mysql data type convert rule

* add done flag

* optimize req/reply parameter

* optimize req/reply parameter

* remove waste code

* remove duplicate parameter

* format code

* format code

* optimize naming

* reactor rpcv2 to rpc

* remove new line

* format code

* rename underline to snake

* reactor getParentPackage

* remove debug log

* reactor background

tools/goctl/rpc/cli/cli.go

@@ -0,0 +1,67 @@
+package cli
+
+import (
+	"errors"
+	"fmt"
+	"path/filepath"
+
+	"github.com/tal-tech/go-zero/tools/goctl/rpc/execx"
+	"github.com/tal-tech/go-zero/tools/goctl/rpc/generator"
+	"github.com/urfave/cli"
+)
+
+// Rpc is to generate rpc service code from a proto file by specifying a proto file using flag src,
+// you can specify a target folder for code generation, when the proto file has import, you can specify
+// the import search directory through the proto_path command, for specific usage, please refer to protoc -h
+func Rpc(c *cli.Context) error {
+	src := c.String("src")
+	out := c.String("dir")
+	protoImportPath := c.StringSlice("proto_path")
+	if len(src) == 0 {
+		return errors.New("the proto source can not be nil")
+	}
+	if len(out) == 0 {
+		return errors.New("the target directory can not be nil")
+	}
+	g := generator.NewDefaultRpcGenerator()
+	return g.Generate(src, out, protoImportPath)
+}
+
+// RpcNew is to generate rpc greet service, this greet service can speed
+// up your understanding of the zrpc service structure
+func RpcNew(c *cli.Context) error {
+	name := c.Args().First()
+	ext := filepath.Ext(name)
+	if len(ext) > 0 {
+		return fmt.Errorf("unexpected ext: %s", ext)
+	}
+
+	protoName := name + ".proto"
+	filename := filepath.Join(".", name, protoName)
+	src, err := filepath.Abs(filename)
+	if err != nil {
+		return err
+	}
+
+	err = generator.ProtoTmpl(src)
+	if err != nil {
+		return err
+	}
+
+	workDir := filepath.Dir(src)
+	_, err = execx.Run("go mod init "+name, workDir)
+	if err != nil {
+		return err
+	}
+
+	g := generator.NewDefaultRpcGenerator()
+	return g.Generate(src, filepath.Dir(src), nil)
+}
+
+func RpcTemplate(c *cli.Context) error {
+	name := c.Args().First()
+	if len(name) == 0 {
+		name = "greet.proto"
+	}
+	return generator.ProtoTmpl(name)
+}