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/generator/defaultgenerator.go

@@ -0,0 +1,33 @@
+package generator
+
+import (
+	"os/exec"
+
+	"github.com/tal-tech/go-zero/tools/goctl/util/console"
+)
+
+type defaultGenerator struct {
+	log console.Console
+}
+
+func NewDefaultGenerator() *defaultGenerator {
+	log := console.NewColorConsole()
+	return &defaultGenerator{
+		log: log,
+	}
+}
+
+func (g *defaultGenerator) Prepare() error {
+	_, err := exec.LookPath("go")
+	if err != nil {
+		return err
+	}
+
+	_, err = exec.LookPath("protoc")
+	if err != nil {
+		return err
+	}
+
+	_, err = exec.LookPath("protoc-gen-go")
+	return err
+}