Improve Rx exception messages

patacrep/build.py

@@ -48,7 +48,7 @@ class Songbook:
         try:
             utils.validate_yaml_schema(raw_songbook, schema)
         except errors.SchemaError as exception:
-            exception.message = "The songbook file '{}' is not valid".format(basename)
+            exception.message = "The songbook file '{}' is not valid\n".format(basename)
             raise exception
 
         self._raw_config = raw_songbook
@@ -89,7 +89,13 @@ class Songbook:
             self._config['book']['lang'],
             self._config['book']['encoding'],
             )
+
+        try:
             self._config['_template'] = renderer.get_all_variables(self._config.get('template', {}))
+        except errors.SchemaError as exception:
+            exception.message = "The songbook file '{}' is not valid\n{}".format(
+                self.basename, exception.message)
+            raise exception
 
         self._config['_compiled_authwords'] = authors.compile_authwords(
             copy.deepcopy(self._config['authors'])

patacrep/errors.py

@@ -17,7 +17,7 @@ class SchemaError(SongbookError):
 
     def __str__(self):
         if self.rx_exception:
-            return self.message + "\n" + str(self.rx_exception)
+            return self.message + str(self.rx_exception)
         else:
             return self.message
 

patacrep/templates.py

@@ -173,8 +173,7 @@ class TexBookRenderer(Renderer):
             try:
                 variables[templatename] = self._get_variables(param, template_config)
             except errors.SchemaError as exception:
-                exception.message = "The songbook file is not valid\n"
+                exception.message += "'template' > '{}' > ".format(templatename)
-                exception.message += "'template' > '{}' >".format(templatename)
                 raise exception
         return variables