diff options
| -rw-r--r-- | python/vyos/config.py | 57 |
1 files changed, 44 insertions, 13 deletions
diff --git a/python/vyos/config.py b/python/vyos/config.py index a5c1ad122..287fd2ed1 100644 --- a/python/vyos/config.py +++ b/python/vyos/config.py @@ -142,31 +142,41 @@ class Config(object): def exists(self, path): """ - Checks if a node with given path exists in the running or proposed config + Checks if a node or value with given path exists in the proposed config. + + Args: + path (str): Configuration tree path Returns: - True if node exists, False otherwise + True if node or value exists in the proposed config, False otherwise Note: - This function cannot be used outside a configuration sessions. + This function should not be used outside of configuration sessions. In operational mode scripts, use ``exists_effective``. """ - if not self._session_config: + if self._session_config is None: return False + + # Assume the path is a node path first if self._session_config.exists(self._make_path(path)): return True else: + # If that check fails, it may mean the path has a value at the end. # libvyosconfig exists() works only for _nodes_, not _values_ - # libvyattacfg one also worked for values, so we emulate that case here + # libvyattacfg also worked for values, so we emulate that case here if isinstance(path, str): path = re.split(r'\s+', path) path_without_value = path[:-1] - path_str = " ".join(path_without_value) try: - value = self._session_config.return_value(self._make_path(path_str)) - return (value == path[-1]) + # return_values() is safe to use with single-value nodes, + # it simply returns a single-item list in that case. + values = self._session_config.return_values(self._make_path(path_without_value)) + + # If we got this far, the node does exist and has values, + # so we need to check if it has the value in question among its values. + return (path[-1] in values) except vyos.configtree.ConfigTreeError: - # node doesn't exist at all + # Even the parent node doesn't exist at all return False def session_changed(self): @@ -380,7 +390,7 @@ class Config(object): def exists_effective(self, path): """ - Check if a node exists in the running (effective) config + Checks if a node or value exists in the running (effective) config. Args: path (str): Configuration tree path @@ -392,10 +402,31 @@ class Config(object): This function is safe to use in operational mode. In configuration mode, it ignores uncommited changes. """ - if self._running_config: - return(self._running_config.exists(self._make_path(path))) + if self._running_config is None: + return False + + # Assume the path is a node path first + if self._running_config.exists(self._make_path(path)): + return True + else: + # If that check fails, it may mean the path has a value at the end. + # libvyosconfig exists() works only for _nodes_, not _values_ + # libvyattacfg also worked for values, so we emulate that case here + if isinstance(path, str): + path = re.split(r'\s+', path) + path_without_value = path[:-1] + try: + # return_values() is safe to use with single-value nodes, + # it simply returns a single-item list in that case. + values = self._running_config.return_values(self._make_path(path_without_value)) + + # If we got this far, the node does exist and has values, + # so we need to check if it has the value in question among its values. + return (path[-1] in values) + except vyos.configtree.ConfigTreeError: + # Even the parent node doesn't exist at all + return False - return False def return_effective_value(self, path, default=None): """ |