(configd) template generation, return ERR when template not found. see...

(configd) template generation, return ERR when template not found. see https://github.com/opnsense/core/issues/329

(cherry picked from commit 196da2bb)

src/opnsense/service/modules/ph_inline_actions.py

@@ -51,14 +51,16 @@ def execute(action, parameters):
         tmpl.setConfig(conf.get())
         filenames = tmpl.generate(parameters)
 
-        # send generated filenames to syslog
-        for filename in filenames:
-            syslog.syslog(syslog.LOG_DEBUG, ' %s generated %s' % (parameters, filename))
-
         del conf
         del tmpl
 
-        return 'OK'
+        # send generated filenames to syslog
+        if filenames is not None:
+            for filename in filenames:
+                syslog.syslog(syslog.LOG_DEBUG, ' %s generated %s' % (parameters, filename))
+            return 'OK'
+        else:
+            return 'ERR'
     elif action.command == 'template.list':
         # traverse all installed templates and return list
         # the number of registered targets is returned between []

src/opnsense/service/modules/template.py

@@ -272,9 +272,9 @@ class Template(object):
         """
         :param module_name: module name in dot notation ( company.module ), may use wildcards
         :param create_directory: automatically create directories to place template output in ( if not existing )
-        :return: list of generated output files
+        :return: list of generated output files or None if template not found
         """
-        result = []
+        result = None
         for template_name in sorted(self.list_modules().keys()):
             wildcard_pos = module_name.find('*')
             do_generate = False
@@ -290,6 +290,8 @@ class Template(object):
                 do_generate = True
 
             if do_generate:
+                if result is None:
+                    result = list()
                 syslog.syslog(syslog.LOG_NOTICE, "generate template container %s" % template_name)
                 for filename in self._generate(template_name, create_directory):
                     result.append(filename)