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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
import { AppConstants } from "resource://gre/modules/AppConstants.sys.mjs";
import { XPCOMUtils } from "resource://gre/modules/XPCOMUtils.sys.mjs";
const lazy = {};
ChromeUtils.defineESModuleGetters(lazy, {
UpdateLog: "resource://gre/modules/UpdateLog.sys.mjs",
UpdateUtils: "resource://gre/modules/UpdateUtils.sys.mjs",
});
const PREF_APP_UPDATE_CANCELATIONS_OSX = "app.update.cancelations.osx";
const PREF_APP_UPDATE_ELEVATE_NEVER = "app.update.elevate.never";
class AbortError extends Error {
constructor(...params) {
super(...params);
this.name = this.constructor.name;
}
}
/**
* `AbortablePromise`s automatically add themselves to this set on construction
* and remove themselves when they settle.
*/
var gPendingAbortablePromises = new Set();
/**
* Creates a Promise that can be resolved immediately with an abort method.
*
* Note that the underlying Promise will probably still run to completion since
* there isn't any general way to abort Promises. So if it is possible to abort
* the operation instead or in addition to using this class, that is preferable.
*/
class AbortablePromise {
#abortFn;
#promise;
#hasCompleted = false;
constructor(promise) {
let abortPromise = new Promise((resolve, reject) => {
this.#abortFn = () => reject(new AbortError());
});
this.#promise = Promise.race([promise, abortPromise]);
this.#promise = this.#promise.finally(() => {
this.#hasCompleted = true;
gPendingAbortablePromises.delete(this);
});
gPendingAbortablePromises.add(this);
}
abort() {
if (this.#hasCompleted) {
return;
}
this.#abortFn();
}
/**
* This can be `await`ed on to get the result of the `AbortablePromise`. It
* will resolve with the value that the Promise provided to the constructor
* resolves with.
*/
get promise() {
return this.#promise;
}
/**
* Will be `true` if the Promise provided to the constructor has resolved or
* `abort()` has been called. Otherwise `false`.
*/
get hasCompleted() {
return this.#hasCompleted;
}
}
function makeAbortable(promise) {
let abortable = new AbortablePromise(promise);
return abortable.promise;
}
function abortAllPromises() {
for (const promise of gPendingAbortablePromises) {
promise.abort();
}
}
/**
* This class checks for app updates in the foreground. It has several public
* methods for checking for updates, downloading updates, stopping the current
* update, and getting the current update status. It can also register
* listeners that will be called back as different stages of updates occur.
*/
export class AppUpdater {
#listeners = new Set();
#status = AppUpdater.STATUS.NEVER_CHECKED;
// This will basically be set to `true` when `AppUpdater.check` is called and
// back to `false` right before it returns.
// It is also set to `true` during an update swap and back to `false` when the
// swap completes.
#updateBusy = false;
// When settings require that the user be asked for permission to download
// updates and we have an update to download, we will assign a function.
// Calling this function allows the download to proceed.
#permissionToDownloadGivenFn = null;
#_update = null;
// Keeps track of if we have an `update-swap` listener connected. We only
// connect it when the status is `READY_TO_RESTART`, but we can't use that to
// tell if its connected because we might be in the middle of an update swap
// in which case the status will have temporarily changed.
#swapListenerConnected = false;
constructor() {
try {
this.QueryInterface = ChromeUtils.generateQI([
"nsIObserver",
"nsISupportsWeakReference",
]);
} catch (e) {
this.#onException(e);
}
}
#onException(exception) {
try {
this.#update = null;
if (this.#swapListenerConnected) {
LOG("AppUpdater:#onException - Removing update-swap listener");
Services.obs.removeObserver(this, "update-swap");
this.#swapListenerConnected = false;
}
if (exception instanceof AbortError) {
// This should be where we end up if `AppUpdater.stop()` is called while
// `AppUpdater.check` is running or during an update swap.
LOG(
"AppUpdater:#onException - Caught AbortError. Setting status " +
"NEVER_CHECKED"
);
this.#setStatus(AppUpdater.STATUS.NEVER_CHECKED);
} else {
LOG(
"AppUpdater:#onException - Exception caught. Setting status " +
"INTERNAL_ERROR"
);
console.error(exception);
this.#setStatus(AppUpdater.STATUS.INTERNAL_ERROR);
}
} catch (e) {
LOG(
"AppUpdater:#onException - Caught additional exception while " +
"handling previous exception"
);
console.error(e);
}
}
/**
* This can be accessed by consumers to inspect the update that is being
* prepared for installation. It will always be null if `AppUpdater.check`
* hasn't been called yet. `AppUpdater.check` will set it to an instance of
* nsIUpdate once there is one available. This may be immediate, if an update
* is already downloading or has been downloaded. It may be delayed if an
* update check needs to be performed first. It also may remain null if the
* browser is up to date or if the update check fails.
*
* Regarding the difference between `AppUpdater.update`, `AppUpdater.#update`,
* and `AppUpdater.#_update`:
* - `AppUpdater.update` and `AppUpdater.#update` are effectively identical
* except that `AppUpdater.update` is readonly since it should not be
* changed from outside this class.
* - `AppUpdater.#_update` should only ever be modified by the setter for
* `AppUpdater.#update` in order to ensure that the "foregroundDownload"
* property is set on assignment.
* The quick and easy rule for using these is to always use `#update`
* internally and (of course) always use `update` externally.
*/
get update() {
return this.#update;
}
get #update() {
return this.#_update;
}
set #update(update) {
this.#_update = update;
if (this.#_update) {
this.#_update.QueryInterface(Ci.nsIWritablePropertyBag);
this.#_update.setProperty("foregroundDownload", "true");
}
}
/**
* The main entry point for checking for updates. As different stages of the
* check and possible subsequent update occur, the updater's status is set and
* listeners are called.
*
* Note that this is the correct entry point, regardless of the current state
* of the updater. Although the function name suggests that this function will
* start an update check, it will only do that if we aren't already in the
* update process. Otherwise, it will simply monitor the update process,
* update its own status, and call listeners.
*
* This function is async and will resolve when the update is ready to
* install, or a failure state is reached.
* However, most callers probably don't actually want to track its progress by
* awaiting on this function. More likely, it is desired to kick this function
* off without awaiting and add a listener via addListener. This allows the
* caller to see when the updater is checking for an update, downloading it,
* etc rather than just knowing "now it's running" and "now it's done".
*
* Note that calling this function while this instance is already performing
* or monitoring an update check/download will have no effect. In other words,
* it is only really necessary/useful to call this function when the status is
* `NEVER_CHECKED` or `NO_UPDATES_FOUND`.
*/
async check() {
try {
// We don't want to end up with multiple instances of the same `async`
// functions waiting on the same events, so if we are already busy going
// through the update state, don't enter this function. This must not
// be in the try/catch that sets #updateBusy to false in its finally
// block.
if (this.#updateBusy) {
return;
}
} catch (e) {
this.#onException(e);
}
try {
this.#updateBusy = true;
this.#update = null;
if (this.#swapListenerConnected) {
LOG("AppUpdater:check - Removing update-swap listener");
Services.obs.removeObserver(this, "update-swap");
this.#swapListenerConnected = false;
}
if (!AppConstants.MOZ_UPDATER || this.#updateDisabledByPackage) {
LOG(
"AppUpdater:check -" +
"AppConstants.MOZ_UPDATER=" +
AppConstants.MOZ_UPDATER +
"this.#updateDisabledByPackage: " +
this.#updateDisabledByPackage
);
this.#setStatus(AppUpdater.STATUS.NO_UPDATER);
return;
}
if (this.aus.disabled) {
LOG("AppUpdater:check - AUS disabled");
this.#setStatus(AppUpdater.STATUS.UPDATE_DISABLED_BY_POLICY);
return;
}
let updateState = this.aus.currentState;
let stateName = this.aus.getStateName(updateState);
LOG(`AppUpdater:check - currentState=${stateName}`);
if (updateState == Ci.nsIApplicationUpdateService.STATE_PENDING) {
LOG("AppUpdater:check - ready for restart");
this.#onReadyToRestart();
return;
}
if (this.aus.isOtherInstanceHandlingUpdates) {
LOG("AppUpdater:check - this.aus.isOtherInstanceHandlingUpdates");
this.#setStatus(AppUpdater.STATUS.OTHER_INSTANCE_HANDLING_UPDATES);
return;
}
if (updateState == Ci.nsIApplicationUpdateService.STATE_DOWNLOADING) {
LOG("AppUpdater:check - downloading");
this.#update = await this.um.getDownloadingUpdate();
await this.#downloadUpdate();
return;
}
if (updateState == Ci.nsIApplicationUpdateService.STATE_STAGING) {
LOG("AppUpdater:check - staging");
this.#update = await this.um.getReadyUpdate();
await this.#awaitStagingComplete();
return;
}
// Clear prefs that could prevent a user from discovering available updates.
if (Services.prefs.prefHasUserValue(PREF_APP_UPDATE_CANCELATIONS_OSX)) {
Services.prefs.clearUserPref(PREF_APP_UPDATE_CANCELATIONS_OSX);
}
if (Services.prefs.prefHasUserValue(PREF_APP_UPDATE_ELEVATE_NEVER)) {
Services.prefs.clearUserPref(PREF_APP_UPDATE_ELEVATE_NEVER);
}
this.#setStatus(AppUpdater.STATUS.CHECKING);
LOG("AppUpdater:check - starting update check");
let check = this.checker.checkForUpdates(this.checker.FOREGROUND_CHECK);
let result;
try {
result = await makeAbortable(check.result);
} catch (e) {
// If we are aborting, stop the update check on our way out.
if (e instanceof AbortError) {
this.checker.stopCheck(check.id);
}
throw e;
}
if (!result.checksAllowed) {
// This shouldn't happen. The cases where this can happen should be
// handled specifically, above.
LOG("AppUpdater:check - !checksAllowed; INTERNAL_ERROR");
this.#setStatus(AppUpdater.STATUS.INTERNAL_ERROR);
return;
}
if (!result.succeeded) {
LOG("AppUpdater:check - Update check failed; CHECKING_FAILED");
this.#setStatus(AppUpdater.STATUS.CHECKING_FAILED);
return;
}
LOG("AppUpdater:check - Update check succeeded");
this.#update = await this.aus.selectUpdate(result.updates);
if (!this.#update) {
LOG("AppUpdater:check - result: NO_UPDATES_FOUND");
this.#setStatus(AppUpdater.STATUS.NO_UPDATES_FOUND);
return;
}
if (this.#update.unsupported) {
LOG("AppUpdater:check - result: UNSUPPORTED SYSTEM");
this.#setStatus(AppUpdater.STATUS.UNSUPPORTED_SYSTEM);
return;
}
if (!this.aus.canApplyUpdates) {
LOG("AppUpdater:check - result: MANUAL_UPDATE");
this.#setStatus(AppUpdater.STATUS.MANUAL_UPDATE);
return;
}
let updateAuto = await makeAbortable(
lazy.UpdateUtils.getAppUpdateAutoEnabled()
);
if (!updateAuto || this.aus.manualUpdateOnly) {
LOG(
"AppUpdater:check - Need to wait for user approval to start the " +
"download."
);
let downloadPermissionPromise = new Promise(resolve => {
this.#permissionToDownloadGivenFn = resolve;
});
// There are other interfaces through which the user can start the
// download, so we want to listen both for permission, and for the
// download to independently start.
let downloadStartPromise = Promise.race([
downloadPermissionPromise,
this.aus.stateTransition,
]);
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_AND_INSTALL);
await makeAbortable(downloadStartPromise);
LOG("AppUpdater:check - Got user approval. Proceeding with download");
// If we resolved because of `aus.stateTransition`, we may actually be
// downloading a different update now.
const downloadingUpdate = await this.um.getDownloadingUpdate();
if (downloadingUpdate) {
this.#update = downloadingUpdate;
}
} else {
LOG(
"AppUpdater:check - updateAuto is active and " +
"manualUpdateOnlydateOnly is inactive. Start the download."
);
}
await this.#downloadUpdate();
} catch (e) {
this.#onException(e);
} finally {
this.#updateBusy = false;
}
}
/**
* This only has an effect if the status is `DOWNLOAD_AND_INSTALL`.This
* indicates that the user has configured Firefox not to download updates
* without permission, and we are waiting the user's permission.
* This function should be called if and only if the user's permission was
* given as it will allow the update download to proceed.
*/
allowUpdateDownload() {
if (this.#permissionToDownloadGivenFn) {
this.#permissionToDownloadGivenFn();
}
}
// true if updating is disabled because we're running in an app package.
// This is distinct from aus.disabled because we need to avoid
// messages being shown to the user about an "administrator" handling
// updates; packaged apps may be getting updated by an administrator or they
// may not be, and we don't have a good way to tell the difference from here,
// so we err to the side of less confusion for unmanaged users.
get #updateDisabledByPackage() {
return Services.sysinfo.getProperty("isPackagedApp");
}
/**
* Downloads an update mar or connects to an in-progress download.
* Doesn't resolve until the update is ready to install, or a failure state
* is reached.
*/
async #downloadUpdate() {
this.#setStatus(AppUpdater.STATUS.DOWNLOADING);
let result = await this.aus.downloadUpdate(this.#update, false);
if (result != Ci.nsIApplicationUpdateService.DOWNLOAD_SUCCESS) {
LOG("AppUpdater:#downloadUpdate - downloadUpdate failed.");
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_FAILED);
return;
}
await this.#awaitDownloadComplete();
}
/**
* Listens for a download to complete.
* Doesn't resolve until the update is ready to install, or a failure state
* is reached.
*/
async #awaitDownloadComplete() {
// These cases are unlikely, but we might have just completed really fast.
let updateState = this.aus.currentState;
switch (updateState) {
case Ci.nsIApplicationUpdateService.STATE_IDLE:
LOG("AppUpdater:#awaitDownloadComplete - Quick failure.");
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_FAILED);
return;
case Ci.nsIApplicationUpdateService.STATE_STAGING:
LOG("AppUpdater:#awaitDownloadComplete - Quick staging.");
await this.#awaitStagingComplete();
return;
case Ci.nsIApplicationUpdateService.STATE_PENDING:
LOG("AppUpdater:#awaitDownloadComplete - Quick pending.");
this.#onReadyToRestart();
return;
}
// We may already be in the `DOWNLOADING` state, depending on how we entered
// this function. But we actually want to alert the listeners again even if
// we are because `this.update.selectedPatch` is null early in the
// downloading state, but it should be set by now and listeners may want to
// update UI based on that.
this.#setStatus(AppUpdater.STATUS.DOWNLOADING);
const updateDownloadProgress = (progress, progressMax) => {
this.#setStatus(AppUpdater.STATUS.DOWNLOADING, progress, progressMax);
};
const progressObserver = {
onStartRequest(aRequest) {
LOG(
`AppUpdater:#awaitDownloadComplete.observer.onStartRequest - ` +
`aRequest: ${aRequest}`
);
},
onStatus(aRequest, aStatus, aStatusArg) {
LOG(
`AppUpdater:#awaitDownloadComplete.observer.onStatus ` +
`- aRequest: ${aRequest}, aStatus: ${aStatus}, ` +
`aStatusArg: ${aStatusArg}`
);
},
onProgress(aRequest, aProgress, aProgressMax) {
LOG(
`AppUpdater:#awaitDownloadComplete.observer.onProgress ` +
`- aRequest: ${aRequest}, aProgress: ${aProgress}, ` +
`aProgressMax: ${aProgressMax}`
);
updateDownloadProgress(aProgress, aProgressMax);
},
onStopRequest(aRequest, aStatusCode) {
LOG(
`AppUpdater:#awaitDownloadComplete.observer.onStopRequest ` +
`- aRequest: ${aRequest}, aStatusCode: ${aStatusCode}`
);
},
QueryInterface: ChromeUtils.generateQI([
"nsIProgressEventSink",
"nsIRequestObserver",
]),
};
let listenForProgress =
updateState == Ci.nsIApplicationUpdateService.STATE_DOWNLOADING;
if (listenForProgress) {
this.aus.addDownloadListener(progressObserver);
LOG("AppUpdater:#awaitDownloadComplete - Registered download listener");
}
LOG("AppUpdater:#awaitDownloadComplete - Waiting for state transition.");
try {
await makeAbortable(this.aus.stateTransition);
} finally {
if (listenForProgress) {
this.aus.removeDownloadListener(progressObserver);
LOG("AppUpdater:#awaitDownloadComplete - Download listener removed");
}
}
updateState = this.aus.currentState;
LOG(
"AppUpdater:#awaitDownloadComplete - State transition seen. New state: " +
this.aus.getStateName(updateState)
);
switch (updateState) {
case Ci.nsIApplicationUpdateService.STATE_IDLE:
LOG(
"AppUpdater:#awaitDownloadComplete - Setting status DOWNLOAD_FAILED."
);
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_FAILED);
break;
case Ci.nsIApplicationUpdateService.STATE_STAGING:
LOG("AppUpdater:#awaitDownloadComplete - awaiting staging completion.");
await this.#awaitStagingComplete();
break;
case Ci.nsIApplicationUpdateService.STATE_PENDING:
LOG("AppUpdater:#awaitDownloadComplete - ready to restart.");
this.#onReadyToRestart();
break;
default:
LOG(
"AppUpdater:#awaitDownloadComplete - Setting status INTERNAL_ERROR."
);
this.#setStatus(AppUpdater.STATUS.INTERNAL_ERROR);
break;
}
}
/**
* This function registers an observer that watches for the staging process
* to complete. Once it does, it sets the status to either request that the
* user restarts to install the update on success, request that the user
* manually download and install the newer version, or automatically download
* a complete update if applicable.
* Doesn't resolve until the update is ready to install, or a failure state
* is reached.
*/
async #awaitStagingComplete() {
// These cases are unlikely, but we might have just completed really fast.
let updateState = this.aus.currentState;
switch (updateState) {
case Ci.nsIApplicationUpdateService.STATE_IDLE:
LOG("AppUpdater:#awaitStagingComplete - Quick failure.");
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_FAILED);
return;
case Ci.nsIApplicationUpdateService.STATE_DOWNLOADING:
LOG("AppUpdater:#awaitStagingComplete - Quick fallback.");
await this.#awaitDownloadComplete();
return;
case Ci.nsIApplicationUpdateService.STATE_PENDING:
LOG("AppUpdater:#awaitStagingComplete - Quick pending.");
this.#onReadyToRestart();
return;
case Ci.nsIApplicationUpdateService.STATE_SWAP:
LOG("AppUpdater:#awaitStagingComplete - Quick swap.");
await this.#awaitDownloadComplete();
return;
}
LOG("AppUpdater:#awaitStagingComplete - Setting status STAGING.");
this.#setStatus(AppUpdater.STATUS.STAGING);
LOG("AppUpdater:#awaitStagingComplete - Waiting for state transition.");
await makeAbortable(this.aus.stateTransition);
updateState = this.aus.currentState;
LOG(
"AppUpdater:#awaitStagingComplete - State transition seen. New state: " +
this.aus.getStateName(updateState)
);
switch (updateState) {
case Ci.nsIApplicationUpdateService.STATE_PENDING:
LOG("AppUpdater:#awaitStagingComplete - ready for restart");
this.#onReadyToRestart();
break;
case Ci.nsIApplicationUpdateService.STATE_IDLE:
LOG("AppUpdater:#awaitStagingComplete - DOWNLOAD_FAILED");
this.#setStatus(AppUpdater.STATUS.DOWNLOAD_FAILED);
break;
case Ci.nsIApplicationUpdateService.STATE_DOWNLOADING:
// We've fallen back to downloading the complete update because the
// partial update failed to be staged. Return to the downloading stage.
LOG(
"AppUpdater:#awaitStagingComplete - Partial update must have " +
"failed to stage. Downloading complete update."
);
await this.#awaitDownloadComplete();
break;
default:
LOG(
"AppUpdater:#awaitStagingComplete - Setting status INTERNAL_ERROR."
);
this.#setStatus(AppUpdater.STATUS.INTERNAL_ERROR);
break;
}
}
#onReadyToRestart() {
let updateState = this.aus.currentState;
if (updateState != Ci.nsIApplicationUpdateService.STATE_PENDING) {
throw new Error(
"AppUpdater:#onReadyToRestart invoked in unexpected state: " +
this.aus.getStateName(updateState)
);
}
LOG("AppUpdater:#onReadyToRestart - Setting status READY_FOR_RESTART.");
if (this.#swapListenerConnected) {
LOG(
"AppUpdater:#onReadyToRestart - update-swap listener already attached"
);
} else {
this.#swapListenerConnected = true;
LOG("AppUpdater:#onReadyToRestart - Attaching update-swap listener");
Services.obs.addObserver(this, "update-swap", /* ownsWeak */ true);
}
this.#setStatus(AppUpdater.STATUS.READY_FOR_RESTART);
}
/**
* Stops the current check for updates and any ongoing download.
*
* If this is called before `AppUpdater.check()` is called or after it
* resolves, this should have no effect. If this is called while `check()` is
* still running, `AppUpdater` will return to the NEVER_CHECKED state. We
* don't really want to leave it in any of the intermediary states after we
* have disconnected all the listeners that would allow those states to ever
* change.
*/
stop() {
LOG("AppUpdater:stop called");
if (this.#swapListenerConnected) {
LOG("AppUpdater:stop - Removing update-swap listener");
Services.obs.removeObserver(this, "update-swap");
this.#swapListenerConnected = false;
}
abortAllPromises();
}
/**
* {AppUpdater.STATUS} The status of the current check or update.
*
* Note that until AppUpdater.check has been called, this will always be set
* to NEVER_CHECKED.
*/
get status() {
return this.#status;
}
/**
* Adds a listener function that will be called back on status changes as
* different stages of updates occur. The function will be called without
* arguments for most status changes; see the comments around the STATUS value
* definitions below. This is safe to call multiple times with the same
* function. It will be added only once.
*
* @param {function} listener
* The listener function to add.
*/
addListener(listener) {
this.#listeners.add(listener);
}
/**
* Removes a listener. This is safe to call multiple times with the same
* function, or with a function that was never added.
*
* @param {function} listener
* The listener function to remove.
*/
removeListener(listener) {
this.#listeners.delete(listener);
}
/**
* Sets the updater's current status and calls listeners.
*
* @param {AppUpdater.STATUS} status
* The new updater status.
* @param {*} listenerArgs
* Arguments to pass to listeners.
*/
#setStatus(status, ...listenerArgs) {
this.#status = status;
for (let listener of this.#listeners) {
listener(status, ...listenerArgs);
}
return status;
}
observe(subject, topic, status) {
LOG(
"AppUpdater:observe " +
"- subject: " +
subject +
", topic: " +
topic +
", status: " +
status
);
switch (topic) {
case "update-swap":
// This is asynchronous, but we don't really want to wait for it in this
// observer.
this.#handleUpdateSwap();
break;
}
}
async #handleUpdateSwap() {
try {
// This must not be in the try/catch that sets #updateBusy to `false` in
// its finally block.
// There really shouldn't be any way to enter this function when
// `#updateBusy` is `true`. But let's just be safe because we don't want
// to ever end up with two things running at once.
if (this.#updateBusy) {
return;
}
} catch (e) {
this.#onException(e);
}
try {
this.#updateBusy = true;
// During an update swap, the new update will initially be stored in
// `downloadingUpdate`. Part way through, it will be moved into
// `readyUpdate` and `downloadingUpdate` will be set to `null`.
this.#update = await this.um.getDownloadingUpdate();
if (!this.#update) {
this.#update = await this.um.getReadyUpdate();
}
await this.#awaitDownloadComplete();
} catch (e) {
this.#onException(e);
} finally {
this.#updateBusy = false;
}
}
}
XPCOMUtils.defineLazyServiceGetter(
AppUpdater.prototype,
"aus",
"@mozilla.org/updates/update-service;1",
"nsIApplicationUpdateService"
);
XPCOMUtils.defineLazyServiceGetter(
AppUpdater.prototype,
"checker",
"@mozilla.org/updates/update-checker;1",
"nsIUpdateChecker"
);
XPCOMUtils.defineLazyServiceGetter(
AppUpdater.prototype,
"um",
"@mozilla.org/updates/update-manager;1",
"nsIUpdateManager"
);
AppUpdater.STATUS = {
// Updates are allowed and there's no downloaded or staged update, but the
// AppUpdater hasn't checked for updates yet, so it doesn't know more than
// that.
NEVER_CHECKED: 0,
// The updater isn't available (AppConstants.MOZ_UPDATER is falsey).
NO_UPDATER: 1,
// "appUpdate" is not allowed by policy.
UPDATE_DISABLED_BY_POLICY: 2,
// Another app instance is handling updates.
OTHER_INSTANCE_HANDLING_UPDATES: 3,
// There's an update, but it's not supported on this system.
UNSUPPORTED_SYSTEM: 4,
// The user must apply updates manually.
MANUAL_UPDATE: 5,
// The AppUpdater is checking for updates.
CHECKING: 6,
// The AppUpdater checked for updates and none were found.
NO_UPDATES_FOUND: 7,
// The AppUpdater is downloading an update. Listeners are notified of this
// status as a download starts. They are also notified on download progress,
// and in that case they are passed two arguments: the current download
// progress and the total download size.
DOWNLOADING: 8,
// The AppUpdater tried to download an update but it failed.
DOWNLOAD_FAILED: 9,
// There's an update available, but the user wants us to ask them to download
// and install it.
DOWNLOAD_AND_INSTALL: 10,
// An update is staging.
STAGING: 11,
// An update is downloaded and staged and will be applied on restart.
READY_FOR_RESTART: 12,
// Essential components of the updater are failing and preventing us from
// updating.
INTERNAL_ERROR: 13,
// Failed to check for updates, network timeout, dns errors could cause this
CHECKING_FAILED: 14,
/**
* Is the given `status` a terminal state in the update state machine?
*
* A terminal state means that the `check()` method has completed.
*
* N.b.: `DOWNLOAD_AND_INSTALL` is not considered terminal because the normal
* flow is that Firefox will show UI prompting the user to install, and when
* the user interacts, the `check()` method will continue through the update
* state machine.
*
* @returns {boolean} `true` if `status` is terminal.
*/
isTerminalStatus(status) {
return ![
AppUpdater.STATUS.CHECKING,
AppUpdater.STATUS.DOWNLOAD_AND_INSTALL,
AppUpdater.STATUS.DOWNLOADING,
AppUpdater.STATUS.NEVER_CHECKED,
AppUpdater.STATUS.STAGING,
].includes(status);
},
/**
* Turn the given `status` into a string for debugging.
*
* @returns {?string} representation of given numerical `status`.
*/
debugStringFor(status) {
for (let [k, v] of Object.entries(AppUpdater.STATUS)) {
if (v == status) {
return k;
}
}
return null;
},
};
/**
* Logs a string to the error console. If enabled, also logs to the update
* messages file.
* @param string
* The string to write to the error console.
*/
function LOG(string) {
lazy.UpdateLog.logPrefixedString("AUS:AUM", string);
}