Merge pull request #14317 from resmo/feature/fail_on_missing_params

module_utils/basic: add generic method for checking for missing param…

lib/ansible/module_utils/basic.py

@@ -1597,6 +1597,19 @@ class AnsibleModule(object):
         print(self.jsonify(kwargs))
         sys.exit(1)
 
+    def fail_on_missing_params(self, required_params=None):
+        ''' This is for checking for required params when we can not check via argspec because we
+        need more information than is simply given in the argspec.
+        '''
+        if not required_params:
+            return
+        missing_params = []
+        for required_param in required_params:
+            if not self.params.get(required_param):
+                missing_params.append(required_param)
+        if missing_params:
+            self.fail_json(msg="missing required arguments: %s" % ','.join(missing_params))
+
     def digest_from_file(self, filename, algorithm):
         ''' Return hex digest of local file for a digest_method specified by name, or None if file is not present. '''
         if not os.path.exists(filename):