From 521b63a28cef7c2953dcba6c826ccde46d19c9d8 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=B6ran=20Karl?=
 <3951388+JoeKar@users.noreply.github.com>
Date: Mon, 17 Jun 2024 17:34:38 +0200
Subject: [PATCH] buffer/settings: On `filetype` change reload parsed local
 settings only

Additionally keep volatile settings as they have been set by the user.
---
 internal/buffer/settings.go | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/internal/buffer/settings.go b/internal/buffer/settings.go
index 355cf864..38385c57 100644
--- a/internal/buffer/settings.go
+++ b/internal/buffer/settings.go
@@ -26,7 +26,23 @@ func (b *Buffer) SetOptionNative(option string, nativeValue interface{}) error {
 	} else if option == "statusline" {
 		screen.Redraw()
 	} else if option == "filetype" {
-		config.InitLocalSettings(b.Settings, b.Path)
+		settings := config.ParsedSettings()
+		settings["filetype"] = nativeValue
+		config.InitLocalSettings(settings, b.Path)
+		for k, v := range config.DefaultCommonSettings() {
+			if k == "filetype" {
+				continue
+			}
+			if _, ok := config.VolatileSettings[k]; ok {
+				// filetype should not override volatile settings
+				continue
+			}
+			if _, ok := settings[k]; ok {
+				b.SetOptionNative(k, settings[k])
+			} else {
+				b.SetOptionNative(k, v)
+			}
+		}
 		b.UpdateRules()
 	} else if option == "fileformat" {
 		switch b.Settings["fileformat"].(string) {