From dc186afdc5b7f42dd32eeafb239b3d5604b8fbbd Mon Sep 17 00:00:00 2001
From: Ines Montani <ines@ines.io>
Date: Sat, 30 May 2020 15:34:54 +0200
Subject: [PATCH] Add warning

---
 spacy/errors.py |  6 ++++++
 spacy/util.py   | 10 ++++++++++
 2 files changed, 16 insertions(+)

diff --git a/spacy/errors.py b/spacy/errors.py
index 932bb1eff..da2cfdf04 100644
--- a/spacy/errors.py
+++ b/spacy/errors.py
@@ -104,6 +104,12 @@ class Warnings(object):
             "string \"Field1=Value1,Value2|Field2=Value3\".")
 
     # TODO: fix numbering after merging develop into master
+    W095 = ("Model '{model}' ({model_version}) requires spaCy {version} and is "
+            "incompatible with the current version ({current}). This may lead "
+            "to unexpected results or runtime errors. To resolve this, "
+            "download a newer compatible model or retrain your custom model "
+            "with the current spaCy version. For more details and available "
+            "updates, run: python -m spacy validate")
     W096 = ("The method 'disable_pipes' has become deprecated - use 'select_pipes' "
             "instead.")
     W097 = ("No Model config was provided to create the '{name}' component, "
diff --git a/spacy/util.py b/spacy/util.py
index 741b289c1..79134400c 100644
--- a/spacy/util.py
+++ b/spacy/util.py
@@ -330,6 +330,16 @@ def get_model_meta(path):
     for setting in ["lang", "name", "version"]:
         if setting not in meta or not meta[setting]:
             raise ValueError(Errors.E054.format(setting=setting))
+    if "spacy_version" in meta:
+        if not is_compatible_version(about.__version__, meta["spacy_version"]):
+            warnings.warn(
+                Warnings.W095.format(
+                    model=f"{meta['lang']}_{meta['name']}",
+                    model_version=meta["version"],
+                    version=meta["spacy_version"],
+                    current=about.__version__,
+                )
+            )
     return meta