Embedded javascript plugins (#1393)

pkg/plugin/plugins.go

@@ -9,6 +9,7 @@ package plugin
 
 import (
 	"fmt"
+	"net/http"
 	"os"
 	"path/filepath"
 
@@ -19,8 +20,9 @@ import (
 
 // Cache stores plugin details.
 type Cache struct {
-	path    string
-	plugins []Config
+	path       string
+	plugins    []Config
+	gqlHandler http.HandlerFunc
 }
 
 // NewCache returns a new Cache loading plugin configurations
@@ -41,6 +43,10 @@ func NewCache(pluginPath string) (*Cache, error) {
 	}, nil
 }
 
+func (c *Cache) RegisterGQLHandler(handler http.HandlerFunc) {
+	c.gqlHandler = handler
+}
+
 // ReloadPlugins clears the plugin cache and reloads from the plugin path.
 // In the event of an error during loading, the cache will be left empty.
 func (c *Cache) ReloadPlugins() error {
@@ -125,6 +131,7 @@ func (c Cache) CreateTask(pluginID string, operationName string, serverConnectio
 		serverConnection: serverConnection,
 		args:             args,
 		progress:         progress,
+		gqlHandler:       c.gqlHandler,
 	}
 	return task.createTask(), nil
 }