fix(updater): fix nsis updater unable to launch installers requiring elevation (#444)

Co-authored-by: Lucas Nogueira <lucas@tauri.studio>

.changes/updater-nsis-admin.md

@@ -0,0 +1,5 @@
+---
+"updater": "patch"
+---
+
+On Windows, fix NSIS installers requiring administrator rights failing to be launched by updater.

plugins/updater/src/updater/core.rs

@@ -728,6 +728,12 @@ fn copy_files_and_run<R: Read + Seek>(
     // extract the msi
     extractor.extract_into(&tmp_dir)?;
 
+    let system_root = std::env::var("SYSTEMROOT");
+    let powershell_path = system_root.as_ref().map_or_else(
+        |_| "powershell.exe".to_string(),
+        |p| format!("{p}\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"),
+    );
+
     let paths = read_dir(&tmp_dir)?;
 
     for path in paths {
@@ -735,10 +741,31 @@ fn copy_files_and_run<R: Read + Seek>(
         // we support 2 type of files exe & msi for now
         // If it's an `exe` we expect an installer not a runtime.
         if found_path.extension() == Some(OsStr::new("exe")) {
+            // we need to wrap the installer path in quotes for Start-Process
+            let mut installer_arg = std::ffi::OsString::new();
+            installer_arg.push("\"");
+            installer_arg.push(&found_path);
+            installer_arg.push("\"");
+
             // Run the EXE
-            Command::new(found_path)
-                .args(config.tauri.bundle.updater.windows.install_mode.nsis_args())
-                .args(&updater_config.installer_args)
+            Command::new(powershell_path)
+                .args(["-NoProfile", "-WindowStyle", "Hidden"])
+                .args(["Start-Process"])
+                .arg(found_path)
+                .arg("-ArgumentList")
+                .arg(
+                    [
+                        config.tauri.bundle.updater.windows.install_mode.nsis_args(),
+                        updater_config
+                            .installer_args
+                            .iter()
+                            .map(AsRef::as_ref)
+                            .collect::<Vec<_>>()
+                            .as_slice(),
+                    ]
+                    .concat()
+                    .join(", "),
+                )
                 .spawn()
                 .expect("installer failed to start");
 
@@ -808,13 +835,8 @@ fn copy_files_and_run<R: Read + Seek>(
             msiexec_args.extend(updater_config.installer_args.clone());
 
             // run the installer and relaunch the application
-            let system_root = std::env::var("SYSTEMROOT");
-            let powershell_path = system_root.as_ref().map_or_else(
-                |_| "powershell.exe".to_string(),
-                |p| format!("{p}\\System32\\WindowsPowerShell\\v1.0\\powershell.exe"),
-            );
             let powershell_install_res = Command::new(powershell_path)
-                .args(["-NoProfile", "-windowstyle", "hidden"])
+                .args(["-NoProfile", "-WindowStyle", "Hidden"])
                 .args([
                     "Start-Process",
                     "-Wait",