feat: use go:embed to embed templates (#1756)

tools/goctl/api/apigen/api.tpl

@@ -0,0 +1,24 @@
+syntax = "v1"
+
+info (
+	title: // TODO: add title
+	desc: // TODO: add description
+	author: "{{.gitUser}}"
+	email: "{{.gitEmail}}"
+)
+
+type request {
+	// TODO: add members here and delete this comment
+}
+
+type response {
+	// TODO: add members here and delete this comment
+}
+
+service {{.serviceName}} {
+	@handler GetUser // TODO: set handler name and delete this comment
+	get /users/id/:userId(request) returns(response)
+
+	@handler CreateUser // TODO: set handler name and delete this comment
+	post /users/create(request)
+}

tools/goctl/api/apigen/gen.go

@@ -1,11 +1,12 @@
 package apigen
 
 import (
+	_ "embed"
 	"errors"
 	"fmt"
+	"html/template"
 	"path/filepath"
 	"strings"
-	"text/template"
 
 	"github.com/logrusorgru/aurora"
 	"github.com/urfave/cli"
@@ -13,32 +14,8 @@ import (
 	"github.com/zeromicro/go-zero/tools/goctl/util/pathx"
 )
 
-const apiTemplate = `
-syntax = "v1"
-
-info (
-	title: // TODO: add title
-	desc: // TODO: add description
-	author: "{{.gitUser}}"
-	email: "{{.gitEmail}}"
-)
-
-type request {
-	// TODO: add members here and delete this comment
-}
-
-type response {
-	// TODO: add members here and delete this comment
-}
-
-service {{.serviceName}} {
-	@handler GetUser // TODO: set handler name and delete this comment
-	get /users/id/:userId(request) returns(response)
-
-	@handler CreateUser // TODO: set handler name and delete this comment
-	post /users/create(request)
-}
-`
+//go:embed api.tpl
+var apiTemplate string
 
 // ApiCommand create api template file
 func ApiCommand(c *cli.Context) error {