From e53ed94f4caabfd4b8a9753ae28350228c2eb784 Mon Sep 17 00:00:00 2001
From: Michele Ceriotti <michele.ceriotti@epfl.ch>
Date: Tue, 12 Nov 2024 12:01:55 +0100
Subject: [PATCH] Added a deprecation warning

---
 ipi/engine/forcefields.py | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/ipi/engine/forcefields.py b/ipi/engine/forcefields.py
index 27576d5a4..b8a5f830c 100644
--- a/ipi/engine/forcefields.py
+++ b/ipi/engine/forcefields.py
@@ -916,6 +916,14 @@ def __init__(
 
         """
 
+        warning(
+            """
+                <ffyaff> is deprecated and might be removed in a future release of i-PI.
+                If you are interested in using it, please help port it to the PES
+                infrastructure.
+                """
+        )
+
         from yaff import System, ForceField, log
         import codecs
         import locale
@@ -1008,6 +1016,14 @@ def __init__(
 
         """
 
+        warning(
+            """
+                <ffsgdml> is deprecated and might be removed in a future release of i-PI.
+                If you are interested in using it, please help port it to the PES
+                infrastructure.
+                """
+        )
+
         # a socket to the communication library is created or linked
         super(FFsGDML, self).__init__(
             latency, offset, name, pars, dopbc, threaded=threaded