feat: rename shader config file on version change (#5636)

* feat: rename shader settings sidecar file on version switch

* fix: cleanup

---------

Co-authored-by: Calum H. <calum@modrinth.com>
Co-authored-by: Calum H. (IMB11) <contact@cal.engineer>

packages/app-lib/src/state/instances/commands/apply_content_install.rs

@@ -285,6 +285,13 @@ pub(crate) async fn switch_project_version_with_dependencies(
     }
 
     if new_path != project_path {
+        rename_project_companion_file(
+            instance_id,
+            project_path,
+            &new_path,
+            state,
+        )
+        .await?;
         remove_project(instance_id, project_path, state).await?;
     }
 
@@ -724,6 +731,42 @@ pub(crate) async fn remove_project(
     Ok(())
 }
 
+pub(crate) async fn rename_project_companion_file(
+    instance_id: &str,
+    old_project_path: &str,
+    new_project_path: &str,
+    state: &State,
+) -> crate::Result<()> {
+    let project_type = ProjectType::get_from_parent_folder(new_project_path);
+    if project_type == Some(ProjectType::ShaderPack) {
+        let scope = resolve_content_scope(instance_id, None, state).await?;
+        let base = instance_full_path(state, &scope.instance);
+
+        let old_txt_path = base.join(format!(
+            "{}.txt",
+            old_project_path.trim_end_matches(".disabled")
+        ));
+        let new_txt_path = base.join(format!(
+            "{}.txt",
+            new_project_path.trim_end_matches(".disabled")
+        ));
+
+        if old_txt_path.exists() {
+            if new_txt_path.exists()
+                && io::canonicalize(&old_txt_path)?
+                    == io::canonicalize(&new_txt_path)?
+            {
+                return Ok(());
+            }
+
+            io::copy(&old_txt_path, &new_txt_path).await?;
+            io::remove_file(&old_txt_path).await?;
+        }
+    }
+
+    Ok(())
+}
+
 pub(crate) async fn list_project_files(
     instance_id: &str,
     state: &State,

packages/app-lib/src/state/instances/commands/apply_content_update.rs

@@ -13,7 +13,7 @@ use std::collections::{HashMap, HashSet};
 use super::apply_content_install::{
     DownloadedProjectVersion, add_downloaded_project_version,
     add_project_from_version, download_project_version, remove_project,
-    toggle_disable_project,
+    rename_project_companion_file, toggle_disable_project,
 };
 use super::check_content_updates::{ContentUpdate, check_content_updates};
 
@@ -108,6 +108,13 @@ async fn apply_content_update(
     }
 
     if new_path != project_path {
+        rename_project_companion_file(
+            instance_id,
+            project_path,
+            &new_path,
+            state,
+        )
+        .await?;
         remove_project(instance_id, project_path, state).await?;
     }
 
@@ -162,6 +169,13 @@ pub(crate) async fn update_all_projects(
                 }
 
                 if new_path != update.relative_path {
+                    rename_project_companion_file(
+                        instance_id,
+                        &update.relative_path,
+                        &new_path,
+                        state,
+                    )
+                    .await?;
                     remove_project(instance_id, &update.relative_path, state)
                         .await?;
                 }