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109 lines
3.2 KiB
JavaScript
109 lines
3.2 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var util = require('util');
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function Console(stdout, stderr) {
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if (!(this instanceof Console)) {
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return new Console(stdout, stderr);
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}
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if (!stdout || !util.isFunction(stdout.write)) {
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throw new TypeError('Console expects a writable stream instance');
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}
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if (!stderr) {
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stderr = stdout;
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}
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var prop = {
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writable: true,
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enumerable: false,
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configurable: true
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};
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prop.value = stdout;
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Object.defineProperty(this, '_stdout', prop);
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prop.value = stderr;
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Object.defineProperty(this, '_stderr', prop);
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prop.value = {};
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Object.defineProperty(this, '_times', prop);
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// bind the prototype functions to this Console instance
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Object.keys(Console.prototype).forEach(function(k) {
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this[k] = this[k].bind(this);
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}, this);
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}
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Console.prototype.log = function() {
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this._stdout.write(util.format.apply(this, arguments) + '\n');
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};
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Console.prototype.info = Console.prototype.log;
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Console.prototype.warn = function() {
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this._stderr.write(util.format.apply(this, arguments) + '\n');
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};
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Console.prototype.error = Console.prototype.warn;
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Console.prototype.dir = function(object) {
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this._stdout.write(util.inspect(object, { customInspect: false }) + '\n');
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};
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Console.prototype.time = function(label) {
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this._times[label] = Date.now();
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};
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Console.prototype.timeEnd = function(label) {
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var time = this._times[label];
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if (!time) {
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throw new Error('No such label: ' + label);
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}
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var duration = Date.now() - time;
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this.log('%s: %dms', label, duration);
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};
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Console.prototype.trace = function() {
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// TODO probably can to do this better with V8's debug object once that is
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// exposed.
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var err = new Error;
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err.name = 'Trace';
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err.message = util.format.apply(this, arguments);
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Error.captureStackTrace(err, arguments.callee);
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this.error(err.stack);
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};
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Console.prototype.assert = function(expression) {
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if (!expression) {
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var arr = Array.prototype.slice.call(arguments, 1);
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require('assert').ok(false, util.format.apply(this, arr));
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}
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};
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module.exports = new Console(process.stdout, process.stderr);
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module.exports.Console = Console;
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