56 lines
1.4 KiB
JavaScript
56 lines
1.4 KiB
JavaScript
/*
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A console.log that won't leave you hanging when node exits
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90% of this file was ripped from node.js
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License: see: https://github.com/joyent/node/blob/master/lib/console.js
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*/
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// console object
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var formatRegExp = /%[sdj]/g;
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function format(f) {
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var util = require('util');
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if (typeof f !== 'string') {
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var objects = [];
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for (var i = 0; i < arguments.length; i++) {
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objects.push(util.inspect(arguments[i]));
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}
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return objects.join(' ');
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}
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var i = 1;
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var args = arguments;
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var str = String(f).replace(formatRegExp, function(x) {
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switch (x) {
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case '%s': return String(args[i++]);
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case '%d': return Number(args[i++]);
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case '%j': return JSON.stringify(args[i++]);
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default:
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return x;
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}
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});
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for (var len = args.length, x = args[i]; i < len; x = args[++i]) {
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if (x === null || typeof x !== 'object') {
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str += ' ' + x;
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} else {
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str += ' ' + util.inspect(x);
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}
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}
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return str;
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}
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console.log = function() {
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var res = process.stdout.write(format.apply(this, arguments) + '\n');
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// this is the first time stdout got backed up
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if (!res && !process.stdout.pendingWrite) {
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process.stdout.pendingWrite = true;
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// magic sauce: keep node alive until stdout has flushed
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process.stdout.once('drain', function () {
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process.stdout.draining = false;
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});
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}
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};
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