connection: add an option to compile obsolete nodes

Since version 4 of sysrepo and libyang, obsolete nodes are no longer
compiled by default.
The sysrepo commit in the link makes sysrepo compile obsolete nodes.
Add the compile_obsolete option, so that sysrepo can create a libyang
context with the obsolete nodes.

Link: sysrepo/sysrepo@15b757a
Signed-off-by: Jeremie Leska <jeremie.leska@6wind.com>

Author: jeremie6wind

cffi/cdefs.h

@@ -52,6 +52,7 @@ typedef enum {
     SR_CTX_DEFAULT,
     SR_CTX_NO_PRINTED,
     SR_CTX_SET_PRIV_PARSED,
+    SR_CTX_COMPILE_OBSOLETE,
     ...
 } sr_context_flag_t;
 

sysrepo/connection.py

@@ -36,7 +36,12 @@ class SysrepoConnection:
 
     __slots__ = ("cdata",)
 
-    def __init__(self, cache_running: bool = False, not_printed: bool = True):
+    def __init__(
+        self,
+        cache_running: bool = False,
+        not_printed: bool = True,
+        compile_obsolete: bool = False,
+    ):
         """
         :arg cache_running:
             Always cache running datastore data which makes mainly repeated retrieval of
@@ -49,6 +54,9 @@ def __init__(self, cache_running: bool = False, not_printed: bool = True):
         if not_printed:
             ctx_flags |= lib.SR_CTX_NO_PRINTED
 
+        if compile_obsolete:
+            ctx_flags |= lib.SR_CTX_COMPILE_OBSOLETE
+
         # mandatory flag to work with libyang-python
         ctx_flags |= lib.SR_CTX_SET_PRIV_PARSED
 

tests/test_connection.py

@@ -93,3 +93,9 @@ def test_conn_start_session_with_printed_context(self):
             sess = conn.start_session()
             self.assertEqual(sess.get_datastore(), "running")
             sess.stop()
+
+    def test_conn_start_session_compile_obsolete(self):
+        with sysrepo.SysrepoConnection(compile_obsolete=True) as conn:
+            sess = conn.start_session()
+            self.assertEqual(sess.get_datastore(), "running")
+            sess.stop()