From d613cd17c72c753bd1e314dff74dc22d9a949374 Mon Sep 17 00:00:00 2001
From: AUTOMATIC1111 <16777216c@gmail.com>
Date: Mon, 1 Jan 2024 14:38:29 +0300
Subject: add automatic backwards version compatibility

---
 modules/infotext.py          |  4 +++-
 modules/infotext_versions.py | 35 +++++++++++++++++++++++++++++++++++
 modules/shared_options.py    |  1 +
 3 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 modules/infotext_versions.py

diff --git a/modules/infotext.py b/modules/infotext.py
index bcbeb0fd..7f30446b 100644
--- a/modules/infotext.py
+++ b/modules/infotext.py
@@ -8,7 +8,7 @@ import sys
 
 import gradio as gr
 from modules.paths import data_path
-from modules import shared, ui_tempdir, script_callbacks, processing
+from modules import shared, ui_tempdir, script_callbacks, processing, infotext_versions, errors
 from PIL import Image
 
 sys.modules['modules.generation_parameters_copypaste'] = sys.modules[__name__]  # alias for old name
@@ -342,6 +342,8 @@ Steps: 20, Sampler: Euler a, CFG scale: 7, Seed: 965400086, Size: 512x512, Model
     if "Cache FP16 weight for LoRA" not in res and res["FP8 weight"] != "Disable":
         res["Cache FP16 weight for LoRA"] = False
 
+    infotext_versions.backcompat(res)
+
     skip = set(shared.opts.infotext_skip_pasting)
     res = {k: v for k, v in res.items() if k not in skip}
 
diff --git a/modules/infotext_versions.py b/modules/infotext_versions.py
new file mode 100644
index 00000000..01e885a2
--- /dev/null
+++ b/modules/infotext_versions.py
@@ -0,0 +1,35 @@
+from modules import shared
+from packaging import version
+import re
+
+
+v160 = version.parse("1.6.0")
+
+
+def parse_version(text):
+    if text is None:
+        return None
+
+    m = re.match(r'([^-]+-[^-]+)-.*', text)
+    if m:
+        text = m.group(1)
+
+    try:
+        return version.parse(text)
+    except Exception as e:
+        return None
+
+
+def backcompat(d):
+    """Checks infotext Version field, and enables backwards compatibility options according to it."""
+
+    if not shared.opts.auto_backcompat:
+        return
+
+    ver = parse_version(d.get("Version"))
+    if ver is None:
+        return
+
+    if ver < v160:
+        d["Old prompt editing timelines"] = True
+
diff --git a/modules/shared_options.py b/modules/shared_options.py
index 752a4f12..281591da 100644
--- a/modules/shared_options.py
+++ b/modules/shared_options.py
@@ -212,6 +212,7 @@ options_templates.update(options_section(('optimizations', "Optimizations", "sd"
 }))
 
 options_templates.update(options_section(('compatibility', "Compatibility", "sd"), {
+    "auto_backcompat": OptionInfo(True, "Automatic backward compatibility").info("automatically enable options for backwards compatibility when importing generation parameters from infotext that has program version."),
     "use_old_emphasis_implementation": OptionInfo(False, "Use old emphasis implementation. Can be useful to reproduce old seeds."),
     "use_old_karras_scheduler_sigmas": OptionInfo(False, "Use old karras scheduler sigmas (0.1 to 10)."),
     "no_dpmpp_sde_batch_determinism": OptionInfo(False, "Do not make DPM++ SDE deterministic across different batch sizes."),
-- 
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