cli: Adjust logging format from plugin hooks to CLI's format (#1108)

* plugin: Fix json log format

* Turn string into boolean

---------

Co-authored-by: Marius Kleidl <marius@transloadit.com>

cmd/tusd/cli/hooks.go

@@ -39,7 +39,8 @@ func getHookHandler(config *handler.Config) hooks.HookHandler {
 		stdout.Printf("Using '%s' to load plugin for hooks", Flags.PluginHookPath)
 
 		return &plugin.PluginHook{
-			Path: Flags.PluginHookPath,
+			Path:          Flags.PluginHookPath,
+			JSONLogFormat: Flags.LogFormat == "json",
 		}
 	} else {
 		return nil

pkg/hooks/plugin/plugin.go

@@ -17,6 +17,8 @@ import (
 
 type PluginHook struct {
 	Path string
+	// JSONLogFormat specifies whether the logs from the plugin hook should be formatted as JSON.
+	JSONLogFormat bool
 
 	handlerImpl hooks.HookHandler
 }
@@ -37,6 +39,7 @@ func (h *PluginHook) Setup() error {
 			Name:       "plugin",
 			Level:      hclog.Debug,
 			Output:     os.Stdout,
+			JSONFormat: h.JSONLogFormat,
 			TimeFormat: "2006/01/02 03:04:05.000000",
 		}),
 	})