Dev: corosync_config_format: Enable to parse comments

Author: liangxin1300

crmsh/corosync.py

@@ -23,6 +23,8 @@
 
 COROSYNC_TOKEN_DEFAULT = 1000  # in ms units
 COROSYNC_CONF_TEMPLATE = """
+# Generated by crmsh
+# For more details please see corosync.conf.5 man page
 totem {
     version: 2
 }

crmsh/corosync_config_format.py

@@ -8,12 +8,13 @@
 
 
 logger = logging.getLogger(__name__)
+COMMENT_PREFIX = '__comment'
 
 
 class Parser:
     """SAX-style parser for the configuration of corosync"""
 
-    _SPLIT_RE = re.compile('\\s*({|:|})\\s*')
+    _SPLIT_RE = re.compile('\\s*(#|{|:|})\\s*')
 
     def __init__(self, ifile):
         """Parse data form a file-like object."""
@@ -34,14 +35,15 @@ def _parse(self, ifile):
             line = line.strip()
             if not line:
                 continue
-            if line[0] == '#':
-                continue
             try:
                 tokens = self._tokenize(line)
             except ValueError as e:
                 raise MalformedLineException(lineno, line)
             logger.debug('tokens: %s', tokens)
-            if tokens[1] == '{':
+            if tokens[1] == '#':
+                fake_secion_name = f'{COMMENT_PREFIX}_{lineno}'
+                self.on_key_value(fake_secion_name, tokens[2])
+            elif tokens[1] == '{':
                 if not tokens[0] or tokens[2]:
                     raise MalformedLineException(lineno, line)
                 self.__section_stack.append(tokens[0])
@@ -237,11 +239,14 @@ def on_dict(self, node):
                     self.on_list(value)
                     del self._path_stack[-1]
                 case _:
-                    self.__write_indent(len(self._path_stack))
-                    self._ofile.write(key)
-                    self._ofile.write(': ')
-                    self.on_value(value)
-                    self._ofile.write('\n')
+                    if key.startswith(COMMENT_PREFIX):
+                        self._ofile.write(f'# {value}\n')
+                    else:
+                        self.__write_indent(len(self._path_stack))
+                        self._ofile.write(key)
+                        self._ofile.write(': ')
+                        self.on_value(value)
+                        self._ofile.write('\n')
 
     def on_list(self, node):
         key = self._path_stack[-1]