Frontend: Foundations for multi tenant frontend (#78815)

* Frontend: Foundations for multi tenant frontend

* improve manifest parsing for multi-tenant frontend (#78876)

* add test

* add test

* ??

* Updates

* Added cache

* test cleanup

* lint

* fix test

* fix error templates

* cleanup

* remove copy

* revert changes to list testdata

* comment cleanup

* prepare integration tests

* Remove integrety

---------

Co-authored-by: Ryan McKinley <ryantxu@gmail.com>

pkg/middleware/middleware_test.go

@@ -149,9 +149,14 @@ func TestMiddlewareContext(t *testing.T) {
 				User:     &dtos.CurrentUser{},
 				Settings: &dtos.FrontendSettingsDTO{},
 				NavTree:  &navtree.NavTreeRoot{},
+				Assets: &dtos.EntryPointAssets{
+					JSFiles:  []dtos.EntryPointAsset{},
+					CSSDark:  "dark.css",
+					CSSLight: "light.css",
+				},
 			}
 			t.Log("Calling HTML", "data", data)
-			c.HTML(http.StatusOK, "index-template", data)
+			c.HTML(http.StatusOK, "index", data)
 			t.Log("Returned HTML with code 200")
 		}
 		sc.fakeReq("GET", "/").exec()
@@ -199,7 +204,7 @@ func middlewareScenario(t *testing.T, desc string, fn scenarioFunc, cbs ...func(
 		cfg.LoginCookieName = "grafana_session"
 		cfg.LoginMaxLifetime = loginMaxLifetime
 		// Required when rendering errors
-		cfg.ErrTemplateName = "error-template"
+		cfg.ErrTemplateName = "error"
 		for _, cb := range cbs {
 			cb(cfg)
 		}

pkg/middleware/recovery.go

@@ -23,6 +23,8 @@ import (
 	"os"
 	"runtime"
 
+	"github.com/grafana/grafana/pkg/api/dtos"
+	"github.com/grafana/grafana/pkg/api/webassets"
 	"github.com/grafana/grafana/pkg/infra/log"
 	"github.com/grafana/grafana/pkg/services/contexthandler"
 	"github.com/grafana/grafana/pkg/setting"
@@ -135,13 +137,19 @@ func Recovery(cfg *setting.Cfg) web.Middleware {
 						return
 					}
 
+					assets, _ := webassets.GetWebAssets(cfg)
+					if assets == nil {
+						assets = &dtos.EntryPointAssets{JSFiles: []dtos.EntryPointAsset{}}
+					}
+
 					data := struct {
 						Title     string
 						AppTitle  string
 						AppSubUrl string
 						Theme     string
 						ErrorMsg  string
-					}{"Server Error", "Grafana", cfg.AppSubURL, cfg.DefaultTheme, ""}
+						Assets    *dtos.EntryPointAssets
+					}{"Server Error", "Grafana", cfg.AppSubURL, cfg.DefaultTheme, "", assets}
 
 					if setting.Env == setting.Dev {
 						if err, ok := r.(error); ok {

pkg/middleware/recovery_test.go

@@ -50,7 +50,7 @@ func panicHandler(c *contextmodel.ReqContext) {
 func recoveryScenario(t *testing.T, desc string, url string, fn scenarioFunc) {
 	t.Run(desc, func(t *testing.T) {
 		cfg := setting.NewCfg()
-		cfg.ErrTemplateName = "error-template"
+		cfg.ErrTemplateName = "error"
 		cfg.UserFacingDefaultError = "test error"
 		sc := &scenarioContext{
 			t:   t,