fix(nsis): remove empty resources folders on uninstall

tauri-apps/tauri#8263

Co-authored-by: Fabian-Lars <[email protected]>

crates/packager/src/package/nsis/installer.nsi

@@ -588,7 +588,14 @@ Section Uninstall
   ; Delete uninstaller
   Delete "$INSTDIR\uninstall.exe"
 
-  RMDir "$INSTDIR"
+  ${If} $DeleteAppDataCheckboxState == 1
+    RMDir /R /REBOOTOK "$INSTDIR"
+  ${Else}
+    {{#each resources_ancestors}}
+    RMDir /REBOOTOK "$INSTDIR\\{{this}}"
+    {{/each}}
+    RMDir "$INSTDIR"
+  ${EndIf}
 
   ; Remove start menu shortcut
   !insertmacro MUI_STARTMENU_GETFOLDER Application $AppStartMenuFolder

crates/packager/src/package/nsis/mod.rs

@@ -449,9 +449,19 @@ fn build_nsis_app_installer(ctx: &Context, nsis_path: &Path) -> crate::Result<Ve
     data.insert("out_file", to_json(out_file));
 
     let (resources_dirs, resources) = generate_resource_data(config)?;
-    data.insert("resources_dirs", to_json(resources_dirs));
+    data.insert("resources_dirs", to_json(&resources_dirs));
     data.insert("resources", to_json(&resources));
 
+    let mut resources_ancestors = resources_dirs
+        .iter()
+        .flat_map(|p| p.ancestors())
+        .collect::<Vec<_>>();
+    resources_ancestors.sort_unstable();
+    resources_ancestors.dedup();
+    resources_ancestors.sort_by_key(|p| std::cmp::Reverse(p.components().count()));
+    resources_ancestors.pop(); // Last one is always ""
+    data.insert("resources_ancestors", to_json(resources_ancestors));
+
     let binaries = generate_binaries_data(config)?;
     data.insert("binaries", to_json(&binaries));