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console: split console into global.js and constructor.js

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Since we do not actually use the Console constructor to
instantiate the global console, move the two piece of
code into two different JS files for clarity, and make
console.js a mere re-export of the global console.
The hope is to make the global console, a namespace, more
web-compatible while keeping the Console constructor
available for backwards compatibility.

PR-URL: https://github.com/nodejs/node/pull/24709
Reviewed-By: Gus Caplan <me@gus.host>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: James M Snell <jasnell@gmail.com>
This commit is contained in:
Joyee Cheung 2018-11-29 06:17:57 +08:00
parent ce8b0e196e
commit cfc2559ee0
No known key found for this signature in database
GPG Key ID: 92B78A53C8303B8D
5 changed files with 79 additions and 62 deletions
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24
lib/console.js Normal file
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@ -0,0 +1,24 @@
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
module.exports = require('internal/console/global');

69
lib/internal/console/constructor.js
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@ -1,26 +1,8 @@
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
// The Console constructor is not actually used to construct the global
// console. It's exported for backwards compatibility.
const { trace } = internalBinding('trace_events');
const {
isStackOverflowError,
@ -72,8 +54,6 @@ const kBindStreamsLazy = Symbol('kBindStreamsLazy');
const kUseStdout = Symbol('kUseStdout');
const kUseStderr = Symbol('kUseStderr');
// This constructor is not used to construct the global console.
// It's exported for backwards compatibility.
function Console(options /* or: stdout, stderr, ignoreErrors = true */) {
// We have to test new.target here to see if this function is called
// with new, because we need to define a custom instanceof to accommodate
@ -531,41 +511,8 @@ Console.prototype.table = function(tabularData, properties) {
function noop() {}
// See https://console.spec.whatwg.org/#console-namespace
// > For historical web-compatibility reasons, the namespace object
// > for console must have as its [[Prototype]] an empty object,
// > created as if by ObjectCreate(%ObjectPrototype%),
// > instead of %ObjectPrototype%.
// Since in Node.js, the Console constructor has been exposed through
// require('console'), we need to keep the Console constructor but
// we cannot actually use `new Console` to construct the global console.
// Therefore, the console.Console.prototype is not
// in the global console prototype chain anymore.
// TODO(joyeecheung):
// - Move the Console constructor into internal/console.js
// - Move the global console creation code along with the inspector console
// wrapping code in internal/bootstrap/node.js into a separate file.
// - Make this file a simple re-export of those two files.
const globalConsole = Object.create({});
// Since Console is not on the prototype chain of the global console,
// the symbol properties on Console.prototype have to be looked up from
// the global console itself. In addition, we need to make the global
// console a namespace by binding the console methods directly onto
// the global console with the receiver fixed.
for (const prop of Reflect.ownKeys(Console.prototype)) {
if (prop === 'constructor') { continue; }
const desc = Reflect.getOwnPropertyDescriptor(Console.prototype, prop);
if (typeof desc.value === 'function') { // fix the receiver
desc.value = desc.value.bind(globalConsole);
}
Reflect.defineProperty(globalConsole, prop, desc);
}
globalConsole[kBindStreamsLazy](process);
globalConsole[kBindProperties](true, 'auto');
module.exports = globalConsole;
module.exports.Console = Console;
module.exports = {
Console,
kBindStreamsLazy,
kBindProperties
};

44
lib/internal/console/global.js Normal file
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@ -0,0 +1,44 @@
'use strict';
// See https://console.spec.whatwg.org/#console-namespace
// > For historical web-compatibility reasons, the namespace object
// > for console must have as its [[Prototype]] an empty object,
// > created as if by ObjectCreate(%ObjectPrototype%),
// > instead of %ObjectPrototype%.
// Since in Node.js, the Console constructor has been exposed through
// require('console'), we need to keep the Console constructor but
// we cannot actually use `new Console` to construct the global console.
// Therefore, the console.Console.prototype is not
// in the global console prototype chain anymore.
const {
Console,
kBindStreamsLazy,
kBindProperties
} = require('internal/console/constructor');
const globalConsole = Object.create({});
// Since Console is not on the prototype chain of the global console,
// the symbol properties on Console.prototype have to be looked up from
// the global console itself. In addition, we need to make the global
// console a namespace by binding the console methods directly onto
// the global console with the receiver fixed.
for (const prop of Reflect.ownKeys(Console.prototype)) {
if (prop === 'constructor') { continue; }
const desc = Reflect.getOwnPropertyDescriptor(Console.prototype, prop);
if (typeof desc.value === 'function') { // fix the receiver
desc.value = desc.value.bind(globalConsole);
}
Reflect.defineProperty(globalConsole, prop, desc);
}
globalConsole[kBindStreamsLazy](process);
globalConsole[kBindProperties](true, 'auto');
// This is a legacy feature - the Console constructor is exposed on
// the global console instance.
globalConsole.Console = Console;
module.exports = globalConsole;

2
node.gyp
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@ -95,6 +95,8 @@
'lib/internal/cluster/shared_handle.js',
'lib/internal/cluster/utils.js',
'lib/internal/cluster/worker.js',
'lib/internal/console/constructor.js',
'lib/internal/console/global.js',
'lib/internal/crypto/certificate.js',
'lib/internal/crypto/cipher.js',
'lib/internal/crypto/diffiehellman.js',

2
test/parallel/test-bootstrap-modules.js
View File

@ -9,7 +9,7 @@ const common = require('../common');
const assert = require('assert');
const isMainThread = common.isMainThread;
const kMaxModuleCount = isMainThread ? 56 : 78;
const kMaxModuleCount = isMainThread ? 58 : 80;
assert(list.length <= kMaxModuleCount,
`Total length: ${list.length}\n` + list.join('\n')