Add server/cache support to gaeconfig.

common/data/text/templateproto/loader.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package templateproto
 
 import (
         "fmt"
 
-        "golang.org/x/net/context"
-
-        "github.com/luci/luci-go/common/config"
         "github.com/luci/luci-go/common/proto"
 )
 
-// LoadFile loads a File from config service by configSet and path.
+// LoadFile loads a File from a string containing the template text protobuf.
 //
 // Expects config.Interface to be in the context already.
-func LoadFile(c context.Context, configSet, path string) (file *File, vers string, err error) {
-        templateData, err := config.GetConfig(c, configSet, path, false)
-        if err != nil {
-                return
-        }
+func LoadFile(data string) (file *File, err error) {
         file = &File{}
-        vers = templateData.ContentHash
-        if err = proto.UnmarshalTextML(templateData.Content, file); err != nil {
+        if err = proto.UnmarshalTextML(data, file); err != nil {
                 return
         }
         err = file.Normalize()
         return
 }
 
 // Render renders the specified template with the given parameters.
 func (f *File) Render(spec *Specifier) (string, error) {
         ret, err := f.Template[spec.TemplateName].Render(spec.Params)
         if err != nil {
                 err = fmt.Errorf("rendering %q: %s", spec.TemplateName, err)
         }
         return ret, err
 }
 
 // RenderL renders a specified template with go literal arguments.
 func (f *File) RenderL(templName string, params LiteralMap) (ret string, err error) {
         spec := &Specifier{TemplateName: templName}
         spec.Params, err = params.Convert()
         if err != nil {
                 return
         }
         return f.Render(spec)
 }