gecko/services/sync/modules/util.js
Edward Lee fdaee13190 Bug 535722 - Reduce the amount of logging for default log levels
Include the URI on success/fail requests and only trace log the onStartRequest. Switch various debug messages to trace and remove importing Log4Moz in fx-weave-overlay and generic-change. Drop the rootLogger to Debug to not log trace messages from unpreffed loggers.
2009-12-17 18:51:55 -08:00

825 lines
25 KiB
JavaScript

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Bookmarks Sync.
*
* The Initial Developer of the Original Code is Mozilla.
* Portions created by the Initial Developer are Copyright (C) 2007
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Dan Mills <thunder@mozilla.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
const EXPORTED_SYMBOLS = ['Utils', 'Svc', 'Str'];
const Cc = Components.classes;
const Ci = Components.interfaces;
const Cr = Components.results;
const Cu = Components.utils;
Cu.import("resource://weave/ext/Preferences.js");
Cu.import("resource://weave/ext/Observers.js");
Cu.import("resource://weave/ext/StringBundle.js");
Cu.import("resource://weave/constants.js");
Cu.import("resource://weave/log4moz.js");
/*
* Utility functions
*/
let Utils = {
/**
* Wrap a function to catch all exceptions and log them
*
* @usage MyObj._catch = Utils.catch;
* MyObj.foo = function() { this._catch(func)(); }
*/
catch: function Utils_catch(func) {
let thisArg = this;
return function WrappedCatch() {
try {
return func.call(thisArg);
}
catch(ex) {
thisArg._log.debug("Exception: " + Utils.exceptionStr(ex));
}
};
},
/**
* Wrap a function to call lock before calling the function then unlock.
*
* @usage MyObj._lock = Utils.lock;
* MyObj.foo = function() { this._lock(func)(); }
*/
lock: function Utils_lock(func) {
let thisArg = this;
return function WrappedLock() {
if (!thisArg.lock())
throw "Could not acquire lock";
try {
return func.call(thisArg);
}
finally {
thisArg.unlock();
}
};
},
/**
* Wrap functions to notify when it starts and finishes executing or if it got
* an error. The message is a combination of a provided prefix and local name
* with the current state and the subject is the provided subject.
*
* @usage function MyObj() { this._notify = Utils.notify("prefix:"); }
* MyObj.foo = function() { this._notify(name, subject, func)(); }
*/
notify: function Utils_notify(prefix) {
return function NotifyMaker(name, subject, func) {
let thisArg = this;
let notify = function(state) {
let mesg = prefix + name + ":" + state;
thisArg._log.trace("Event: " + mesg);
Observers.notify(mesg, subject);
};
return function WrappedNotify() {
try {
notify("start");
let ret = func.call(thisArg);
notify("finish");
return ret;
}
catch(ex) {
notify("error");
throw ex;
}
};
};
},
batchSync: function batchSync(service, engineType) {
return function batchedSync() {
let engine = this;
let batchEx = null;
// Try running sync in batch mode
Svc[service].runInBatchMode({
runBatched: function wrappedSync() {
try {
engineType.prototype._sync.call(engine);
}
catch(ex) {
batchEx = ex;
}
}
}, null);
// Expose the exception if something inside the batch failed
if (batchEx!= null)
throw batchEx;
};
},
// Generates a brand-new globally unique identifier (GUID).
makeGUID: function makeGUID() {
// 70 characters that are not-escaped URL-friendly
const code =
"!()*-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~";
let guid = "";
let num = 0;
let val;
// Generate ten 70-value characters for a 70^10 (~61.29-bit) GUID
for (let i = 0; i < 10; i++) {
// Refresh the number source after using it a few times
if (i == 0 || i == 5)
num = Math.random();
// Figure out which code to use for the next GUID character
num *= 70;
val = Math.floor(num);
guid += code[val];
num -= val;
}
return guid;
},
anno: function anno(id, anno, val, expire) {
// Figure out if we have a bookmark or page
let annoFunc = (typeof id == "number" ? "Item" : "Page") + "Annotation";
// Convert to a nsIURI if necessary
if (typeof id == "string")
id = Utils.makeURI(id);
if (id == null)
throw "Null id for anno! (invalid uri)";
switch (arguments.length) {
case 2:
// Get the annotation with 2 args
return Svc.Annos["get" + annoFunc](id, anno);
case 3:
expire = "NEVER";
// Fallthrough!
case 4:
// Convert to actual EXPIRE value
expire = Svc.Annos["EXPIRE_" + expire];
// Set the annotation with 3 or 4 args
return Svc.Annos["set" + annoFunc](id, anno, val, 0, expire);
}
},
ensureOneOpen: let (windows = {}) function ensureOneOpen(window) {
// Close the other window if it exists
let url = window.location.href;
let other = windows[url];
if (other != null)
other.close();
// Save the new window for future closure
windows[url] = window;
// Actively clean up when the window is closed
window.addEventListener("unload", function() windows[url] = null, false);
},
// Returns a nsILocalFile representing a file relative to the
// current user's profile directory. If the argument is a string,
// it should be a string with unix-style slashes for directory names
// (these slashes are automatically converted to platform-specific
// path separators).
//
// Alternatively, if the argument is an object, it should contain
// the following attributes:
//
// path: the path to the file, relative to the current user's
// profile dir.
//
// autoCreate: whether or not the file should be created if it
// doesn't already exist.
getProfileFile: function getProfileFile(arg) {
if (typeof arg == "string")
arg = {path: arg};
let pathParts = arg.path.split("/");
let file = Svc.Directory.get("ProfD", Ci.nsIFile);
file.QueryInterface(Ci.nsILocalFile);
for (let i = 0; i < pathParts.length; i++)
file.append(pathParts[i]);
if (arg.autoCreate && !file.exists())
file.create(file.NORMAL_FILE_TYPE, PERMS_FILE);
return file;
},
/**
* Add a simple getter/setter to an object that defers access of a property
* to an inner property.
*
* @param obj
* Object to add properties to defer in its prototype
* @param defer
* Hash property of obj to defer to (dot split each level)
* @param prop
* Property name to defer (or an array of property names)
*/
deferGetSet: function Utils_deferGetSet(obj, defer, prop) {
if (Utils.isArray(prop))
return prop.map(function(prop) Utils.deferGetSet(obj, defer, prop));
// Split the defer into each dot part for each level to dereference
let parts = defer.split(".");
let deref = function(base) Utils.deref(base, parts);
let prot = obj.prototype;
// Create a getter if it doesn't exist yet
if (!prot.__lookupGetter__(prop))
prot.__defineGetter__(prop, function() deref(this)[prop]);
// Create a setter if it doesn't exist yet
if (!prot.__lookupSetter__(prop))
prot.__defineSetter__(prop, function(val) deref(this)[prop] = val);
},
/**
* Dereference an array of properties starting from a base object
*
* @param base
* Base object to start dereferencing
* @param props
* Array of properties to dereference (one for each level)
*/
deref: function Utils_deref(base, props) props.reduce(function(curr, prop)
curr[prop], base),
/**
* Determine if some value is an array
*
* @param val
* Value to check (can be null, undefined, etc.)
* @return True if it's an array; false otherwise
*/
isArray: function Utils_isArray(val) val != null && typeof val == "object" &&
val.constructor.name == "Array",
// lazy load objects from a constructor on first access. It will
// work with the global object ('this' in the global context).
lazy: function Weave_lazy(dest, prop, ctr) {
delete dest[prop];
dest.__defineGetter__(prop, Utils.lazyCb(dest, prop, ctr));
},
lazyCb: function Weave_lazyCb(dest, prop, ctr) {
return function() {
delete dest[prop];
dest[prop] = new ctr();
return dest[prop];
};
},
// like lazy, but rather than new'ing the 3rd arg we use its return value
lazy2: function Weave_lazy2(dest, prop, fn) {
delete dest[prop];
dest.__defineGetter__(prop, Utils.lazyCb2(dest, prop, fn));
},
lazyCb2: function Weave_lazyCb2(dest, prop, fn) {
return function() {
delete dest[prop];
return dest[prop] = fn();
};
},
lazySvc: function Weave_lazySvc(dest, prop, cid, iface) {
let getter = function() {
delete dest[prop];
let svc = null;
// Try creating a fake service if we can handle that
if (!Cc[cid]) {
switch (cid) {
case "@mozilla.org/privatebrowsing;1":
svc = {
autoStarted: false,
privateBrowsingEnabled: false
};
break;
}
let log = Log4Moz.repository.getLogger("Service.Util");
if (svc == null)
log.warn("Component " + cid + " doesn't exist on this platform.");
else
log.debug("Using a fake svc object for " + cid);
}
else
svc = Cc[cid].getService(iface);
return dest[prop] = svc;
};
dest.__defineGetter__(prop, getter);
},
lazyInstance: function Weave_lazyInstance(dest, prop, cid, iface) {
let getter = function() {
delete dest[prop];
dest[prop] = Cc[cid].createInstance(iface);
return dest[prop];
};
dest.__defineGetter__(prop, getter);
},
lazyStrings: function Weave_lazyStrings(name) {
let bundle = "chrome://weave/locale/" + name + ".properties";
return function() new StringBundle(bundle);
},
deepEquals: function eq(a, b) {
// If they're triple equals, then it must be equals!
if (a === b)
return true;
// If they weren't equal, they must be objects to be different
if (typeof a != "object" || typeof b != "object")
return false;
// But null objects won't have properties to compare
if (a === null || b === null)
return false;
// Make sure all of a's keys have a matching value in b
for (let k in a)
if (!eq(a[k], b[k]))
return false;
// Do the same for b's keys but skip those that we already checked
for (let k in b)
if (!(k in a) && !eq(a[k], b[k]))
return false;
return true;
},
deepCopy: function Weave_deepCopy(thing, noSort) {
if (typeof(thing) != "object" || thing == null)
return thing;
let ret;
if (Utils.isArray(thing)) {
ret = [];
for (let i = 0; i < thing.length; i++)
ret.push(Utils.deepCopy(thing[i], noSort));
} else {
ret = {};
let props = [p for (p in thing)];
if (!noSort)
props = props.sort();
props.forEach(function(k) ret[k] = Utils.deepCopy(thing[k], noSort));
}
return ret;
},
// Works on frames or exceptions, munges file:// URIs to shorten the paths
// FIXME: filename munging is sort of hackish, might be confusing if
// there are multiple extensions with similar filenames
formatFrame: function Utils_formatFrame(frame) {
let tmp = "<file:unknown>";
let file = frame.filename || frame.fileName;
if (file)
tmp = file.replace(/^(?:chrome|file):.*?([^\/\.]+\.\w+)$/, "$1");
if (frame.lineNumber)
tmp += ":" + frame.lineNumber;
if (frame.name)
tmp = frame.name + "()@" + tmp;
return tmp;
},
exceptionStr: function Weave_exceptionStr(e) {
let message = e.message ? e.message : e;
return message + " " + Utils.stackTrace(e);
},
stackTraceFromFrame: function Weave_stackTraceFromFrame(frame) {
let output = [];
while (frame) {
let str = Utils.formatFrame(frame);
if (str)
output.push(str);
frame = frame.caller;
}
return output.join(" < ");
},
stackTrace: function Weave_stackTrace(e) {
// Wrapped nsIException
if (e.location)
return "Stack trace: " + Utils.stackTraceFromFrame(e.location);
// Standard JS exception
if (e.stack)
return "JS Stack trace: " + e.stack.trim().replace(/\n/g, " < ").
replace(/@(?:chrome|file):.*?([^\/\.]+\.\w+:)/g, "@$1");
return "No traceback available";
},
checkStatus: function Weave_checkStatus(code, msg, ranges) {
if (!ranges)
ranges = [[200,300]];
for (let i = 0; i < ranges.length; i++) {
var rng = ranges[i];
if (typeof(rng) == "object" && code >= rng[0] && code < rng[1])
return true;
else if (typeof(rng) == "number" && code == rng) {
return true;
}
}
if (msg) {
let log = Log4Moz.repository.getLogger("Service.Util");
log.error(msg + " Error code: " + code);
}
return false;
},
ensureStatus: function Weave_ensureStatus(args) {
if (!Utils.checkStatus.apply(Utils, arguments))
throw 'checkStatus failed';
},
sha1: function Weave_sha1(string) {
let converter = Cc["@mozilla.org/intl/scriptableunicodeconverter"].
createInstance(Ci.nsIScriptableUnicodeConverter);
converter.charset = "UTF-8";
let hasher = Cc["@mozilla.org/security/hash;1"]
.createInstance(Ci.nsICryptoHash);
hasher.init(hasher.SHA1);
let data = converter.convertToByteArray(string, {});
hasher.update(data, data.length);
let rawHash = hasher.finish(false);
// return the two-digit hexadecimal code for a byte
function toHexString(charCode) {
return ("0" + charCode.toString(16)).slice(-2);
}
let hash = [toHexString(rawHash.charCodeAt(i)) for (i in rawHash)].join("");
return hash;
},
makeURI: function Weave_makeURI(URIString) {
if (!URIString)
return null;
try {
return Svc.IO.newURI(URIString, null, null);
} catch (e) {
let log = Log4Moz.repository.getLogger("Service.Util");
log.debug("Could not create URI: " + Utils.exceptionStr(e));
return null;
}
},
makeURL: function Weave_makeURL(URIString) {
let url = Utils.makeURI(URIString);
url.QueryInterface(Ci.nsIURL);
return url;
},
xpath: function Weave_xpath(xmlDoc, xpathString) {
let root = xmlDoc.ownerDocument == null ?
xmlDoc.documentElement : xmlDoc.ownerDocument.documentElement;
let nsResolver = xmlDoc.createNSResolver(root);
return xmlDoc.evaluate(xpathString, xmlDoc, nsResolver,
Ci.nsIDOMXPathResult.ANY_TYPE, null);
},
getTmp: function Weave_getTmp(name) {
let tmp = Svc.Directory.get("ProfD", Ci.nsIFile);
tmp.QueryInterface(Ci.nsILocalFile);
tmp.append("weave");
tmp.append("tmp");
if (!tmp.exists())
tmp.create(tmp.DIRECTORY_TYPE, PERMS_DIRECTORY);
if (name)
tmp.append(name);
return tmp;
},
/**
* Load a json object from disk
*
* @param filePath
* Json file path load from weave/[filePath].json
* @param that
* Object to use for logging and "this" for callback
* @param callback
* Function to process json object as its first parameter
*/
jsonLoad: function Utils_jsonLoad(filePath, that, callback) {
filePath = "weave/" + filePath + ".json";
if (that._log)
that._log.trace("Loading json from disk: " + filePath);
let file = Utils.getProfileFile(filePath);
if (!file.exists())
return;
try {
let [is] = Utils.open(file, "<");
let json = Utils.readStream(is);
is.close();
callback.call(that, JSON.parse(json));
}
catch (ex) {
if (that._log)
that._log.debug("Failed to load json: " + Utils.exceptionStr(ex));
}
},
/**
* Save a json-able object to disk
*
* @param filePath
* Json file path save to weave/[filePath].json
* @param that
* Object to use for logging and "this" for callback
* @param callback
* Function to provide json-able object to save. If this isn't a
* function, it'll be used as the object to make a json string.
*/
jsonSave: function Utils_jsonSave(filePath, that, callback) {
filePath = "weave/" + filePath + ".json";
if (that._log)
that._log.trace("Saving json to disk: " + filePath);
let file = Utils.getProfileFile({ autoCreate: true, path: filePath });
let json = typeof callback == "function" ? callback.call(that) : callback;
let out = JSON.stringify(json);
let [fos] = Utils.open(file, ">");
fos.writeString(out);
fos.close();
},
/**
* Return a timer that is scheduled to call the callback after waiting the
* provided time or as soon as possible. The timer will be set as a property
* of the provided object with the given timer name.
*/
delay: function delay(callback, wait, thisObj, name) {
// Default to running right away
wait = wait || 0;
// Use a dummy object if one wasn't provided
thisObj = thisObj || {};
// Delay an existing timer if it exists
if (thisObj[name] instanceof Ci.nsITimer) {
thisObj[name].delay = wait;
return;
}
// Create a special timer that we can add extra properties
let timer = {};
timer.__proto__ = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
// Provide an easy way to clear out the timer
timer.clear = function() {
thisObj[name] = null;
timer.cancel();
};
// Initialize the timer with a smart callback
timer.initWithCallback({
notify: function notify() {
// Clear out the timer once it's been triggered
timer.clear();
callback.call(thisObj, timer);
}
}, wait, timer.TYPE_ONE_SHOT);
return thisObj[name] = timer;
},
open: function open(pathOrFile, mode, perms) {
let stream, file;
if (pathOrFile instanceof Ci.nsIFile) {
file = pathOrFile;
} else {
file = Cc["@mozilla.org/file/local;1"].createInstance(Ci.nsILocalFile);
dump("PATH IS" + pathOrFile + "\n");
file.initWithPath(pathOrFile);
}
if (!perms)
perms = PERMS_FILE;
switch(mode) {
case "<": {
if (!file.exists())
throw "Cannot open file for reading, file does not exist";
let fis = Cc["@mozilla.org/network/file-input-stream;1"].
createInstance(Ci.nsIFileInputStream);
fis.init(file, MODE_RDONLY, perms, 0);
stream = Cc["@mozilla.org/intl/converter-input-stream;1"].
createInstance(Ci.nsIConverterInputStream);
stream.init(fis, "UTF-8", 4096,
Ci.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
} break;
case ">": {
let fos = Cc["@mozilla.org/network/file-output-stream;1"].
createInstance(Ci.nsIFileOutputStream);
fos.init(file, MODE_WRONLY | MODE_CREATE | MODE_TRUNCATE, perms, 0);
stream = Cc["@mozilla.org/intl/converter-output-stream;1"]
.createInstance(Ci.nsIConverterOutputStream);
stream.init(fos, "UTF-8", 4096, 0x0000);
} break;
case ">>": {
let fos = Cc["@mozilla.org/network/file-output-stream;1"].
createInstance(Ci.nsIFileOutputStream);
fos.init(file, MODE_WRONLY | MODE_CREATE | MODE_APPEND, perms, 0);
stream = Cc["@mozilla.org/intl/converter-output-stream;1"]
.createInstance(Ci.nsIConverterOutputStream);
stream.init(fos, "UTF-8", 4096, 0x0000);
} break;
default:
throw "Illegal mode to open(): " + mode;
}
return [stream, file];
},
/**
* Open/reshow a window/dialog based on its name and type.
*
* @param name
* Name of the window/dialog to reshow if already open
* @param type
* Opening behavior: "Window" or "Dialog"
* @param args
* More arguments go here depending on the type
*/
_openWin: function Utils__openWin(name, type /*, args... */) {
// Just re-show the window if it's already open
let openedWindow = Svc.WinMediator.getMostRecentWindow("Weave:" + name);
if (openedWindow) {
openedWindow.focus();
return;
}
// Open up the window/dialog!
let win = Svc.WinWatcher;
if (type == "Dialog")
win = win.activeWindow;
win["open" + type].apply(win, Array.slice(arguments, 2));
},
_openChromeWindow: function Utils_openCWindow(name, uri, options, args) {
Utils.openWindow(name, "chrome://weave/content/" + uri, options, args);
},
openWindow: function Utils_openWindow(name, uri, options, args) {
Utils._openWin(name, "Window", null, uri, "",
options || "centerscreen,chrome,dialog,resizable=yes", args);
},
openDialog: function Utils_openDialog(name, uri, options, args) {
Utils._openWin(name, "Dialog", "chrome://weave/content/" + uri, "",
options || "centerscreen,chrome,dialog,modal,resizable=no", args);
},
openGenericDialog: function Utils_openGenericDialog(type) {
this._genericDialogType = type;
this.openDialog("ChangeSomething", "generic-change.xul");
},
getIcon: function(iconUri, defaultIcon) {
try {
let iconURI = Utils.makeURI(iconUri);
return Svc.Favicon.getFaviconLinkForIcon(iconURI).spec;
}
catch(ex) {}
// Just give the provided default icon or the system's default
return defaultIcon || Svc.Favicon.defaultFavicon.spec;
},
getErrorString: function Utils_getErrorString(error, args) {
try {
return Str.errors.get(error, args || null);
} catch (e) {}
// basically returns "Unknown Error"
return Str.errors.get("error.reason.unknown");
},
// assumes an nsIConverterInputStream
readStream: function Weave_readStream(is) {
let ret = "", str = {};
while (is.readString(4096, str) != 0) {
ret += str.value;
}
return ret;
},
/**
* Create an array like the first but without elements of the second
*/
arraySub: function arraySub(minuend, subtrahend) {
return minuend.filter(function(i) subtrahend.indexOf(i) == -1);
},
bind2: function Async_bind2(object, method) {
return function innerBind() { return method.apply(object, arguments); };
},
__prefs: null,
get prefs() {
if (!this.__prefs) {
this.__prefs = Cc["@mozilla.org/preferences-service;1"]
.getService(Ci.nsIPrefService);
this.__prefs = this.__prefs.getBranch(PREFS_BRANCH);
this.__prefs.QueryInterface(Ci.nsIPrefBranch2);
}
return this.__prefs;
}
};
/*
* Commonly-used services
*/
let Svc = {};
Svc.Prefs = new Preferences(PREFS_BRANCH);
Svc.Obs = Observers;
[["Annos", "@mozilla.org/browser/annotation-service;1", "nsIAnnotationService"],
["AppInfo", "@mozilla.org/xre/app-info;1", "nsIXULAppInfo"],
["Bookmark", "@mozilla.org/browser/nav-bookmarks-service;1", "nsINavBookmarksService"],
["Crypto", "@labs.mozilla.com/Weave/Crypto;1", "IWeaveCrypto"],
["Directory", "@mozilla.org/file/directory_service;1", "nsIProperties"],
["Env", "@mozilla.org/process/environment;1", "nsIEnvironment"],
["Favicon", "@mozilla.org/browser/favicon-service;1", "nsIFaviconService"],
["History", "@mozilla.org/browser/nav-history-service;1", "nsPIPlacesDatabase"],
["Idle", "@mozilla.org/widget/idleservice;1", "nsIIdleService"],
["IO", "@mozilla.org/network/io-service;1", "nsIIOService"],
["Login", "@mozilla.org/login-manager;1", "nsILoginManager"],
["Memory", "@mozilla.org/xpcom/memory-service;1", "nsIMemory"],
["Observer", "@mozilla.org/observer-service;1", "nsIObserverService"],
["Private", "@mozilla.org/privatebrowsing;1", "nsIPrivateBrowsingService"],
["Profiles", "@mozilla.org/toolkit/profile-service;1", "nsIToolkitProfileService"],
["Prompt", "@mozilla.org/embedcomp/prompt-service;1", "nsIPromptService"],
["Script", "@mozilla.org/moz/jssubscript-loader;1", "mozIJSSubScriptLoader"],
["SysInfo", "@mozilla.org/system-info;1", "nsIPropertyBag2"],
["Version", "@mozilla.org/xpcom/version-comparator;1", "nsIVersionComparator"],
["WinMediator", "@mozilla.org/appshell/window-mediator;1", "nsIWindowMediator"],
["WinWatcher", "@mozilla.org/embedcomp/window-watcher;1", "nsIWindowWatcher"],
].forEach(function(lazy) Utils.lazySvc(Svc, lazy[0], lazy[1], Ci[lazy[2]]));
let Str = {};
["engines", "errors", "sync"]
.forEach(function(lazy) Utils.lazy2(Str, lazy, Utils.lazyStrings(lazy)));