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