43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
// Inspired by https://github.com/tlrobinson/long-stack-traces
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var EventEmitter = require('events').EventEmitter;
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var util = require('util');
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function extendTrace(object, property, pos) {
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var old = object[property];
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object[property] = function() {
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var error = new Error();
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var name = object.constructor.name + '#' + property + '(' +
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Array.prototype.slice.call(arguments).map(function(el) {
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return util.inspect(el, false, 0);
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}).join(', ') + ')';
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if (typeof pos === 'undefined') pos = -1;
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if (pos < 0) pos += arguments.length;
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var cb = arguments[pos];
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if (typeof arguments[pos] === 'function') {
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arguments[pos] = function replacement() {
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try {
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return cb.apply(this, arguments);
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} catch (err) {
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if (err && err.stack && !err.__augmented) {
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err.stack = filter(err).join('\n');
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err.stack += '\n--> in ' + name;
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err.stack += '\n' + filter(error).slice(1).join('\n');
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err.__augmented = true;
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}
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throw err;
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}
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};
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}
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return old.apply(this, arguments);
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};
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}
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exports.extendTrace = extendTrace;
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function filter(error) {
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return error.stack.split('\n').filter(function(line) {
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return line.indexOf(__filename) < 0;
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});
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}
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