rpc service generation (#26)

* add execute files

* add protoc-osx

* add rpc generation

* add rpc generation

* add: rpc template generation

* update usage

* fixed env prepare for project in go path

* optimize gomod cache

* add README.md

* format error

* reactor templatex.go

* remove waste code

tools/goctl/rpc/goen/template.go

@@ -0,0 +1,44 @@
+package gogen
+
+import (
+	"github.com/tal-tech/go-zero/tools/goctl/util"
+	"github.com/tal-tech/go-zero/tools/goctl/util/console"
+)
+
+var rpcTemplateText = `syntax = "proto3";
+
+package remoteuser;
+
+message Request {
+  string username = 1;
+  string password = 2;
+}
+
+message Response {
+  string name = 1;
+  string gender = 2;
+}
+
+service User{
+  rpc Login(Request)returns(Response);
+}`
+
+type (
+	rpcTemplate struct {
+		out string
+		console.Console
+	}
+)
+
+func NewRpcTemplate(out string, idea bool) *rpcTemplate {
+	return &rpcTemplate{
+		out:     out,
+		Console: console.NewConsole(idea),
+	}
+}
+
+func (r *rpcTemplate) MustGenerate() {
+	err := util.With("t").Parse(rpcTemplateText).SaveTo(nil, r.out, false)
+	r.Must(err)
+	r.Success("Done.")
+}