T7969: expose boolean test value_exists

Author: jestabro

libvyosconfig/lib/bindings.ml

@@ -179,6 +179,13 @@ let exists c_ptr path =
     let path = split_on_whitespace path in
     if (Vytree.exists ct path) then 1 else 0
 
+let value_exists c_ptr path value =
+    let ct = Root.get c_ptr in
+    let path = split_on_whitespace path in
+    try
+        if (CT.value_exists ct path value) then 1 else 0
+    with VT.Empty_path -> 0
+
 let list_nodes c_ptr path =
     let ct = Root.get c_ptr in
     let path = split_on_whitespace path in
@@ -325,6 +332,7 @@ struct
   let () = I.internal "is_leaf"  ((ptr void) @-> string @-> returning bool) is_leaf
   let () = I.internal "get_subtree" ((ptr void) @-> string @-> bool @-> returning (ptr void)) get_subtree
   let () = I.internal "exists"  ((ptr void) @-> string @-> returning int) exists
+  let () = I.internal "value_exists"  ((ptr void) @-> string @-> string @-> returning int) value_exists
   let () = I.internal "list_nodes" ((ptr void) @-> string @-> returning string) list_nodes
   let () = I.internal "return_value" ((ptr void) @-> string @-> returning string) return_value
   let () = I.internal "return_values" ((ptr void) @-> string @-> returning string) return_values

python/vyos/configtree.py

@@ -145,6 +145,10 @@ def __init__(
         self.__exists.argtypes = [c_void_p, c_char_p]
         self.__exists.restype = c_int
 
+        self.__value_exists = self.__lib.value_exists
+        self.__value_exists.argtypes = [c_void_p, c_char_p, c_char_p]
+        self.__value_exists.restype = c_int
+
         self.__list_nodes = self.__lib.list_nodes
         self.__list_nodes.argtypes = [c_void_p, c_char_p]
         self.__list_nodes.restype = c_char_p
@@ -361,6 +365,16 @@ def exists(self, path):
         else:
             return True
 
+    def value_exists(self, path, value):
+        check_path(path)
+        path_str = ' '.join(map(str, path)).encode()
+
+        res = self.__value_exists(self.__config, path_str, value)
+        if res == 0:
+            return False
+        else:
+            return True
+
     def list_nodes(self, path, path_must_exist=True):
         check_path(path)
         path_str = ' '.join(map(str, path)).encode()