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-rw-r--r--python/vyos/configdep.py65
-rw-r--r--python/vyos/util.py8
2 files changed, 73 insertions, 0 deletions
diff --git a/python/vyos/configdep.py b/python/vyos/configdep.py
new file mode 100644
index 000000000..e6b82ca93
--- /dev/null
+++ b/python/vyos/configdep.py
@@ -0,0 +1,65 @@
+# Copyright 2022 VyOS maintainers and contributors <maintainers@vyos.io>
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library. If not, see <http://www.gnu.org/licenses/>.
+
+import os
+from inspect import stack
+
+from vyos.util import load_as_module
+
+dependents = {}
+
+def canon_name(name: str) -> str:
+ return os.path.splitext(name)[0].replace('-', '_')
+
+def canon_name_of_path(path: str) -> str:
+ script = os.path.basename(path)
+ return canon_name(script)
+
+def caller_name() -> str:
+ return stack()[-1].filename
+
+def run_config_mode_script(script: str, config):
+ from vyos.defaults import directories
+
+ path = os.path.join(directories['conf_mode'], script)
+ name = canon_name(script)
+ mod = load_as_module(name, path)
+
+ config.set_level([])
+ try:
+ c = mod.get_config(config)
+ mod.verify(c)
+ mod.generate(c)
+ mod.apply(c)
+ except (VyOSError, ConfigError) as e:
+ raise ConfigError(repr(e))
+
+def def_closure(script: str, config):
+ def func_impl():
+ run_config_mode_script(script, config)
+ return func_impl
+
+def set_dependent(target: str, config):
+ k = canon_name_of_path(caller_name())
+ l = dependents.setdefault(k, [])
+ func = def_closure(target, config)
+ l.append(func)
+
+def call_dependents():
+ k = canon_name_of_path(caller_name())
+ l = dependents.get(k, [])
+ while l:
+ f = l.pop(0)
+ f()
diff --git a/python/vyos/util.py b/python/vyos/util.py
index a80584c5a..9ebe69b6c 100644
--- a/python/vyos/util.py
+++ b/python/vyos/util.py
@@ -1143,3 +1143,11 @@ def camel_to_snake_case(name: str) -> str:
pattern = r'\d+|[A-Z]?[a-z]+|\W|[A-Z]{2,}(?=[A-Z][a-z]|\d|\W|$)'
words = re.findall(pattern, name)
return '_'.join(map(str.lower, words))
+
+def load_as_module(name: str, path: str):
+ import importlib.util
+
+ spec = importlib.util.spec_from_file_location(name, path)
+ mod = importlib.util.module_from_spec(spec)
+ spec.loader.exec_module(mod)
+ return mod