portalHelper: Port to ESM

The helper app that provides the login dialog for network portals
is another separate process that can be moved to ESM separately.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2786>

.eslintrc.yml

@@ -5,6 +5,7 @@ overrides:
   - files:
       - js/ui/init.js
       - js/dbusServices/**
+      - js/portalHelper/**
       - subprojects/extensions-app/**
     parserOptions:
       sourceType: module

js/portalHelper/main.js

@@ -1,10 +1,12 @@
-/* exported main */
-imports.gi.versions.Adw = '1';
-imports.gi.versions.Gtk = '4.0';
-imports.gi.versions.WebKit = '6.0';
+import Adw from 'gi://Adw?version=1';
+import Gio from 'gi://Gio';
+import GLib from 'gi://GLib';
+import GObject from 'gi://GObject';
+import Gtk from 'gi://Gtk?version=4.0';
+import WebKit from 'gi://WebKit?version=6.0';
 
-const Gettext = imports.gettext;
-const {Adw, Gio, GLib, GObject, Gtk, WebKit} = imports.gi;
+import * as Gettext from 'gettext';
+import {programInvocationName, programArgs} from 'system';
 
 const _ = Gettext.gettext;
 
@@ -360,13 +362,8 @@ class WebPortalHelper extends Adw.Application {
     }
 });
 
-/**
- * @param {string[]} argv - command line arguments
- */
-function main(argv) {
 Gettext.bindtextdomain(Config.GETTEXT_PACKAGE, Config.LOCALEDIR);
 Gettext.textdomain(Config.GETTEXT_PACKAGE);
 
-    let app = new WebPortalHelper();
-    return app.run(argv);
-}
+const app = new WebPortalHelper();
+await app.runAsync([programInvocationName, ...programArgs]);

src/gnome-shell-portal-helper.c

@@ -11,7 +11,7 @@ main (int argc, char *argv[])
   const char *search_path[] = { "resource:///org/gnome/shell", NULL };
   GError *error = NULL;
   GjsContext *context;
-  int status;
+  uint8_t status;
 
   bindtextdomain (GETTEXT_PACKAGE, LOCALEDIR);
   bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
@@ -24,12 +24,8 @@ main (int argc, char *argv[])
 
   gjs_context_set_argv(context, argc - 1, (const char**)argv + 1);
 
-  if (!gjs_context_eval (context,
-                         "const Main = imports.portalHelper.main;"
-                         "const {programInvocationName, programArgs} = imports.system;"
-                         "Main.main([programInvocationName, ...programArgs]);",
-                         -1,
-                         "<main>",
+  if (!gjs_context_eval_module_file (context,
+                                     "resource:///org/gnome/shell/portalHelper/main.js",
                                      &status,
                                      &error))
     {