feat(updater): add plugin (#350)

Co-authored-by: Fabian-Lars <fabianlars@fabianlars.de>

plugins/updater/tests/app-updater/src/main.rs

@@ -0,0 +1,49 @@
+// Copyright 2019-2023 Tauri Programme within The Commons Conservancy
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-License-Identifier: MIT
+
+#![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
+
+use tauri_plugin_updater::UpdaterExt;
+
+fn main() {
+  let mut context = tauri::generate_context!();
+  if std::env::var("TARGET").unwrap_or_default() == "nsis" {
+    // /D sets the default installation directory ($INSTDIR),
+    // overriding InstallDir and InstallDirRegKey.
+    // It must be the last parameter used in the command line and must not contain any quotes, even if the path contains spaces.
+    // Only absolute paths are supported.
+    // NOTE: we only need this because this is an integration test and we don't want to install the app in the programs folder
+    context.config_mut().tauri.updater.windows.installer_args = vec![format!(
+      "/D={}",
+      tauri::utils::platform::current_exe()
+        .unwrap()
+        .parent()
+        .unwrap()
+        .display()
+    )];
+  }
+  tauri::Builder::default()
+    .plugin(tauri_plugin_updater::Builder::new().build())
+    .setup(|app| {
+      let handle = app.handle();
+      tauri::async_runtime::spawn(async move {
+        match handle.updater().check().await {
+          Ok(update) => {
+            if let Err(e) = update.download_and_install().await {
+              println!("{e}");
+              std::process::exit(1);
+            }
+            std::process::exit(0);
+          }
+          Err(e) => {
+            println!("{e}");
+            std::process::exit(1);
+          }
+        }
+      });
+      Ok(())
+    })
+    .run(context)
+    .expect("error while running tauri application");
+}