exec function working dir is the kustomization that referenced it (#4125)

* exec function working dir is the kustomization that referenced it

* suggested changes

* more code review

* use a field instead of an annotation

* more code review

api/internal/plugins/fnplugin/fnplugin.go

@@ -79,6 +79,7 @@ func NewFnPlugin(o *types.FnPluginLoadingOptions) *FnPlugin {
 			StorageMounts:  toStorageMounts(o.Mounts),
 			Env:            o.Env,
 			AsCurrentUser:  o.AsCurrentUser,
+			WorkingDir:     o.WorkingDir,
 		},
 	}
 }

api/internal/plugins/loader/loader.go

@@ -47,6 +47,11 @@ func (l *Loader) Config() *types.PluginConfig {
 	return l.pc
 }
 
+// SetWorkDir sets the working directory for this loader's plugins
+func (l *Loader) SetWorkDir(wd string) {
+	l.pc.FnpLoadingOptions.WorkingDir = wd
+}
+
 func (l *Loader) LoadGenerators(
 	ldr ifc.Loader, v ifc.Validator, rm resmap.ResMap) ([]resmap.Generator, error) {
 	var result []resmap.Generator