environment: Port environment.js to be an ES module

Removes the init() function in favor of executing all environment
changes when the file is imported.

Additionally ports all unit tests using imports.gi.environment.init() to
use the updated module.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2822>

.eslintrc.yml

@@ -4,6 +4,7 @@ extends:
 overrides:
   - files:
       - js/ui/init.js
+      - js/ui/environment.js
       - js/dbusServices/**
       - js/portalHelper/**
       - subprojects/extensions-app/**

js/ui/environment.js

@@ -1,22 +1,24 @@
-/* exported init */
-
 // Load all required dependencies with the correct versions
-imports.misc.dependencies; // eslint-disable-line no-unused-expressions
+import '../misc/dependencies.js';
 
+import {setConsoleLogDomain} from 'console';
+import * as Gettext from 'gettext';
+
+import Clutter from 'gi://Clutter';
+import Gdk from 'gi://Gdk';
+import Gio from 'gi://Gio';
+import GLib from 'gi://GLib';
+import GObject from 'gi://GObject';
+import Meta from 'gi://Meta';
+import Polkit from 'gi://Polkit';
+import Shell from 'gi://Shell';
+import St from 'gi://St';
 
-const Clutter = imports.gi.Clutter;
-const Gdk = imports.gi.Gdk;
-const Gio = imports.gi.Gio;
-const GLib = imports.gi.GLib;
-const GObject = imports.gi.GObject;
-const Meta = imports.gi.Meta;
-const Polkit = imports.gi.Polkit;
-const Shell = imports.gi.Shell;
-const St = imports.gi.St;
-const Gettext = imports.gettext;
 const SignalTracker = imports.misc.signalTracker;
 const {adjustAnimationTime} = imports.misc.animationUtils;
 
+setConsoleLogDomain('GNOME Shell');
+
 Gio._promisify(Gio.DataInputStream.prototype, 'fill_async');
 Gio._promisify(Gio.DataInputStream.prototype, 'read_line_async');
 Gio._promisify(Gio.DBus, 'get');
@@ -28,9 +30,8 @@ Gio._promisify(Gio.File.prototype, 'query_info_async');
 Gio._promisify(Polkit.Permission, 'new');
 
 // We can't import shell JS modules yet, because they may have
-// variable initializations, etc, that depend on init() already having
-// been run.
-
+// variable initializations, etc, that depend on this file's
+// changes
 
 // "monkey patch" in some varargs ClutterContainer methods; we need
 // to do this per-container class since there is no representation
@@ -248,89 +249,88 @@ function _easeActorProperty(actor, propName, target, params) {
     transition.connect('stopped', (t, finished) => callback(finished));
 }
 
-function init() {
-    // Add some bindings to the global JS namespace
-    globalThis.global = Shell.Global.get();
+// Add some bindings to the global JS namespace
+globalThis.global = Shell.Global.get();
 
-    globalThis._ = Gettext.gettext;
-    globalThis.C_ = Gettext.pgettext;
-    globalThis.ngettext = Gettext.ngettext;
-    globalThis.N_ = s => s;
+globalThis._ = Gettext.gettext;
+globalThis.C_ = Gettext.pgettext;
+globalThis.ngettext = Gettext.ngettext;
+globalThis.N_ = s => s;
 
-    GObject.gtypeNameBasedOnJSPath = true;
+GObject.gtypeNameBasedOnJSPath = true;
 
-    GObject.Object.prototype.connectObject = function (...args) {
+GObject.Object.prototype.connectObject = function (...args) {
     SignalTracker.connectObject(this, ...args);
-    };
-    GObject.Object.prototype.connect_object = function (...args) {
+};
+GObject.Object.prototype.connect_object = function (...args) {
     SignalTracker.connectObject(this, ...args);
-    };
-    GObject.Object.prototype.disconnectObject = function (...args) {
+};
+GObject.Object.prototype.disconnectObject = function (...args) {
     SignalTracker.disconnectObject(this, ...args);
-    };
-    GObject.Object.prototype.disconnect_object = function (...args) {
+};
+GObject.Object.prototype.disconnect_object = function (...args) {
     SignalTracker.disconnectObject(this, ...args);
-    };
+};
 
-    SignalTracker.registerDestroyableType(Clutter.Actor);
+SignalTracker.registerDestroyableType(Clutter.Actor);
 
-    // Miscellaneous monkeypatching
-    _patchContainerClass(St.BoxLayout);
+// Miscellaneous monkeypatching
+_patchContainerClass(St.BoxLayout);
 
-    _patchLayoutClass(Clutter.GridLayout, {
+_patchLayoutClass(Clutter.GridLayout, {
     row_spacing: 'spacing-rows',
     column_spacing: 'spacing-columns',
-    });
-    _patchLayoutClass(Clutter.BoxLayout, { spacing: 'spacing' });
+});
+_patchLayoutClass(Clutter.BoxLayout, {spacing: 'spacing'});
 
-    let origSetEasingDuration = Clutter.Actor.prototype.set_easing_duration;
-    Clutter.Actor.prototype.set_easing_duration = function (msecs) {
+const origSetEasingDuration = Clutter.Actor.prototype.set_easing_duration;
+Clutter.Actor.prototype.set_easing_duration = function (msecs) {
     origSetEasingDuration.call(this, adjustAnimationTime(msecs));
-    };
-    let origSetEasingDelay = Clutter.Actor.prototype.set_easing_delay;
-    Clutter.Actor.prototype.set_easing_delay = function (msecs) {
+};
+const origSetEasingDelay = Clutter.Actor.prototype.set_easing_delay;
+Clutter.Actor.prototype.set_easing_delay = function (msecs) {
     origSetEasingDelay.call(this, adjustAnimationTime(msecs));
-    };
+};
 
-    Clutter.Actor.prototype.ease = function (props) {
+Clutter.Actor.prototype.ease = function (props) {
     _easeActor(this, props);
-    };
-    Clutter.Actor.prototype.ease_property = function (propName, target, params) {
+};
+Clutter.Actor.prototype.ease_property = function (propName, target, params) {
     _easeActorProperty(this, propName, target, params);
-    };
-    St.Adjustment.prototype.ease = function (target, params) {
+};
+St.Adjustment.prototype.ease = function (target, params) {
     // we're not an actor of course, but we implement the same
     // transition API as Clutter.Actor, so this works anyway
     _easeActorProperty(this, 'value', target, params);
-    };
+};
 
-    Clutter.Actor.prototype[Symbol.iterator] = function* () {
+Clutter.Actor.prototype[Symbol.iterator] = function* () {
     for (let c = this.get_first_child(); c; c = c.get_next_sibling())
         yield c;
-    };
+};
 
-    Clutter.Actor.prototype.toString = function () {
+Clutter.Actor.prototype.toString = function () {
     return St.describe_actor(this);
-    };
-    // Deprecation warning for former JS classes turned into an actor subclass
-    Object.defineProperty(Clutter.Actor.prototype, 'actor', {
+};
+// Deprecation warning for former JS classes turned into an actor subclass
+Object.defineProperty(Clutter.Actor.prototype, 'actor', {
     get() {
         let klass = this.constructor.name;
-            let { stack } = new Error();
+        let {stack} = new Error();
         log(`Usage of object.actor is deprecated for ${klass}\n${stack}`);
         return this;
     },
-    });
+});
 
-    Gio.File.prototype.touch_async = function (callback) {
+Gio.File.prototype.touch_async = function (callback) {
     Shell.util_touch_file_async(this, callback);
-    };
-    Gio.File.prototype.touch_finish = function (result) {
+};
+Gio.File.prototype.touch_finish = function (result) {
     return Shell.util_touch_file_finish(this, result);
-    };
+};
 
-    let origToString = Object.prototype.toString;
-    Object.prototype.toString = function () {
+const origToString = Object.prototype.toString;
+Object.prototype.toString = function () {
     let base = origToString.call(this);
     try {
         if ('actor' in this && this.actor instanceof Clutter.Actor)
@@ -340,24 +340,23 @@ function init() {
     } catch (e) {
         return base;
     }
-    };
+};
 
-    let slowdownEnv = GLib.getenv('GNOME_SHELL_SLOWDOWN_FACTOR');
-    if (slowdownEnv) {
+const slowdownEnv = GLib.getenv('GNOME_SHELL_SLOWDOWN_FACTOR');
+if (slowdownEnv) {
     let factor = parseFloat(slowdownEnv);
     if (!isNaN(factor) && factor > 0.0)
         St.Settings.get().slow_down_factor = factor;
-    }
-
-    // OK, now things are initialized enough that we can import shell JS
-    const Format = imports.format;
-
-    String.prototype.format = Format.format;
-
-    Math.clamp = function (x, lower, upper) {
-        return Math.min(Math.max(x, lower), upper);
-    };
-
-    // Prevent extensions from opening a display connection to ourselves
-    Gdk.set_allowed_backends('');
 }
+
+// OK, now things are initialized enough that we can import shell JS
+const Format = imports.format;
+
+String.prototype.format = Format.format;
+
+Math.clamp = function (x, lower, upper) {
+    return Math.min(Math.max(x, lower), upper);
+};
+
+// Prevent extensions from opening a display connection to ourselves
+Gdk.set_allowed_backends('');

js/ui/init.js

@@ -1,10 +1,7 @@
-import {setConsoleLogDomain} from 'console';
 import GLib from 'gi://GLib';
 import Gio from 'gi://Gio';
 
-setConsoleLogDomain('GNOME Shell');
-
-imports.ui.environment.init();
+import './environment.js';
 
 // Run the Mutter main loop after
 // GJS finishes resolving this module.

tests/unit/highlighter.js

@@ -5,9 +5,7 @@
 const JsUnit = imports.jsUnit;
 import Pango from 'gi://Pango';
 
-const Environment = imports.ui.environment;
-Environment.init();
-
+import '../../js/ui/environment.js';
 const Util = imports.misc.util;
 
 const tests = [

tests/unit/insertSorted.js

@@ -1,12 +1,13 @@
 /* -*- mode: js2; js2-basic-offset: 4; indent-tabs-mode: nil -*- */
 
 // Test cases for Util.insertSorted
-import * as Assertions from '../common/assertions.js';
 
 // Needed so that Util can bring some UI stuff
 // we don't actually use
-const Environment = imports.ui.environment;
-Environment.init();
+import '../../js/ui/environment.js';
+
+import * as Assertions from '../common/assertions.js';
+
 const Util = imports.misc.util;
 
 let arrayInt = [1, 2, 3, 5, 6];

tests/unit/jsParse.js

@@ -4,9 +4,9 @@
 
 const JsUnit = imports.jsUnit;
 
+import '../../js/ui/environment.js';
+
 import * as Assertions from '../common/assertions.js';
-const Environment = imports.ui.environment;
-Environment.init();
 
 const JsParse = imports.misc.jsParse;
 

tests/unit/markup.js

@@ -5,8 +5,7 @@
 const JsUnit = imports.jsUnit;
 import Pango from 'gi://Pango';
 
-const Environment = imports.ui.environment;
-Environment.init();
+import '../../js/ui/environment.js';
 
 imports.ui.main; // eslint-disable-line no-unused-expressions
 const MessageList = imports.ui.messageList;

tests/unit/signalTracker.js

@@ -2,16 +2,14 @@
 
 // Test cases for version comparison
 
+import '../../js/ui/environment.js';
 import GObject from 'gi://GObject';
 
 const JsUnit = imports.jsUnit;
 const Signals = imports.misc.signals;
 
-const Environment = imports.ui.environment;
 const {TransientSignalHolder, registerDestroyableType} = imports.misc.signalTracker;
 
-Environment.init();
-
 const Destroyable = GObject.registerClass({
     Signals: {'destroy': {}},
 }, class Destroyable extends GObject.Object {});

tests/unit/url.js

@@ -4,8 +4,7 @@
 
 const JsUnit = imports.jsUnit;
 
-const Environment = imports.ui.environment;
-Environment.init();
+import '../../js/ui/environment.js';
 
 const Util = imports.misc.util;
 

tests/unit/versionCompare.js

@@ -4,8 +4,7 @@
 
 const JsUnit = imports.jsUnit;
 
-const Environment = imports.ui.environment;
-Environment.init();
+import '../../js/ui/environment.js';
 
 const Util = imports.misc.util;