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'use strict';
const escapeStringRegexp = require('escape-string-regexp');
const cwd = typeof process === 'object' && process && typeof process.cwd === 'function'
? process.cwd()
: '.'
const natives = [].concat(
require('module').builtinModules,
'bootstrap_node',
'node',
).map(n => new RegExp(`(?:\\((?:node:)?${n}(?:\\.js)?:\\d+:\\d+\\)$|^\\s*at (?:node:)?${n}(?:\\.js)?:\\d+:\\d+$)`));
natives.push(
/\((?:node:)?internal\/[^:]+:\d+:\d+\)$/,
/\s*at (?:node:)?internal\/[^:]+:\d+:\d+$/,
/\/\.node-spawn-wrap-\w+-\w+\/node:\d+:\d+\)?$/
);
class StackUtils {
constructor (opts) {
opts = {
ignoredPackages: [],
...opts
};
if ('internals' in opts === false) {
opts.internals = StackUtils.nodeInternals();
}
if ('cwd' in opts === false) {
opts.cwd = cwd
}
this._cwd = opts.cwd.replace(/\\/g, '/');
this._internals = [].concat(
opts.internals,
ignoredPackagesRegExp(opts.ignoredPackages)
);
this._wrapCallSite = opts.wrapCallSite || false;
}
static nodeInternals () {
return [...natives];
}
clean (stack, indent = 0) {
indent = ' '.repeat(indent);
if (!Array.isArray(stack)) {
stack = stack.split('\n');
}
if (!(/^\s*at /.test(stack[0])) && (/^\s*at /.test(stack[1]))) {
stack = stack.slice(1);
}
let outdent = false;
let lastNonAtLine = null;
const result = [];
stack.forEach(st => {
st = st.replace(/\\/g, '/');
if (this._internals.some(internal => internal.test(st))) {
return;
}
const isAtLine = /^\s*at /.test(st);
if (outdent) {
st = st.trimEnd().replace(/^(\s+)at /, '$1');
} else {
st = st.trim();
if (isAtLine) {
st = st.slice(3);
}
}
st = st.replace(`${this._cwd}/`, '');
if (st) {
if (isAtLine) {
if (lastNonAtLine) {
result.push(lastNonAtLine);
lastNonAtLine = null;
}
result.push(st);
} else {
outdent = true;
lastNonAtLine = st;
}
}
});
return result.map(line => `${indent}${line}\n`).join('');
}
captureString (limit, fn = this.captureString) {
if (typeof limit === 'function') {
fn = limit;
limit = Infinity;
}
const {stackTraceLimit} = Error;
if (limit) {
Error.stackTraceLimit = limit;
}
const obj = {};
Error.captureStackTrace(obj, fn);
const {stack} = obj;
Error.stackTraceLimit = stackTraceLimit;
return this.clean(stack);
}
capture (limit, fn = this.capture) {
if (typeof limit === 'function') {
fn = limit;
limit = Infinity;
}
const {prepareStackTrace, stackTraceLimit} = Error;
Error.prepareStackTrace = (obj, site) => {
if (this._wrapCallSite) {
return site.map(this._wrapCallSite);
}
return site;
};
if (limit) {
Error.stackTraceLimit = limit;
}
const obj = {};
Error.captureStackTrace(obj, fn);
const { stack } = obj;
Object.assign(Error, {prepareStackTrace, stackTraceLimit});
return stack;
}
at (fn = this.at) {
const [site] = this.capture(1, fn);
if (!site) {
return {};
}
const res = {
line: site.getLineNumber(),
column: site.getColumnNumber()
};
setFile(res, site.getFileName(), this._cwd);
if (site.isConstructor()) {
res.constructor = true;
}
if (site.isEval()) {
res.evalOrigin = site.getEvalOrigin();
}
// Node v10 stopped with the isNative() on callsites, apparently
/* istanbul ignore next */
if (site.isNative()) {
res.native = true;
}
let typename;
try {
typename = site.getTypeName();
} catch (_) {
}
if (typename && typename !== 'Object' && typename !== '[object Object]') {
res.type = typename;
}
const fname = site.getFunctionName();
if (fname) {
res.function = fname;
}
const meth = site.getMethodName();
if (meth && fname !== meth) {
res.method = meth;
}
return res;
}
parseLine (line) {
const match = line && line.match(re);
if (!match) {
return null;
}
const ctor = match[1] === 'new';
let fname = match[2];
const evalOrigin = match[3];
const evalFile = match[4];
const evalLine = Number(match[5]);
const evalCol = Number(match[6]);
let file = match[7];
const lnum = match[8];
const col = match[9];
const native = match[10] === 'native';
const closeParen = match[11] === ')';
let method;
const res = {};
if (lnum) {
res.line = Number(lnum);
}
if (col) {
res.column = Number(col);
}
if (closeParen && file) {
// make sure parens are balanced
// if we have a file like "asdf) [as foo] (xyz.js", then odds are
// that the fname should be += " (asdf) [as foo]" and the file
// should be just "xyz.js"
// walk backwards from the end to find the last unbalanced (
let closes = 0;
for (let i = file.length - 1; i > 0; i--) {
if (file.charAt(i) === ')') {
closes++;
} else if (file.charAt(i) === '(' && file.charAt(i - 1) === ' ') {
closes--;
if (closes === -1 && file.charAt(i - 1) === ' ') {
const before = file.slice(0, i - 1);
const after = file.slice(i + 1);
file = after;
fname += ` (${before}`;
break;
}
}
}
}
if (fname) {
const methodMatch = fname.match(methodRe);
if (methodMatch) {
fname = methodMatch[1];
method = methodMatch[2];
}
}
setFile(res, file, this._cwd);
if (ctor) {
res.constructor = true;
}
if (evalOrigin) {
res.evalOrigin = evalOrigin;
res.evalLine = evalLine;
res.evalColumn = evalCol;
res.evalFile = evalFile && evalFile.replace(/\\/g, '/');
}
if (native) {
res.native = true;
}
if (fname) {
res.function = fname;
}
if (method && fname !== method) {
res.method = method;
}
return res;
}
}
function setFile (result, filename, cwd) {
if (filename) {
filename = filename.replace(/\\/g, '/');
if (filename.startsWith(`${cwd}/`)) {
filename = filename.slice(cwd.length + 1);
}
result.file = filename;
}
}
function ignoredPackagesRegExp(ignoredPackages) {
if (ignoredPackages.length === 0) {
return [];
}
const packages = ignoredPackages.map(mod => escapeStringRegexp(mod));
return new RegExp(`[\/\\\\]node_modules[\/\\\\](?:${packages.join('|')})[\/\\\\][^:]+:\\d+:\\d+`)
}
const re = new RegExp(
'^' +
// Sometimes we strip out the ' at' because it's noisy
'(?:\\s*at )?' +
// $1 = ctor if 'new'
'(?:(new) )?' +
// $2 = function name (can be literally anything)
// May contain method at the end as [as xyz]
'(?:(.*?) \\()?' +
// (eval at <anonymous> (file.js:1:1),
// $3 = eval origin
// $4:$5:$6 are eval file/line/col, but not normally reported
'(?:eval at ([^ ]+) \\((.+?):(\\d+):(\\d+)\\), )?' +
// file:line:col
// $7:$8:$9
// $10 = 'native' if native
'(?:(.+?):(\\d+):(\\d+)|(native))' +
// maybe close the paren, then end
// if $11 is ), then we only allow balanced parens in the filename
// any imbalance is placed on the fname. This is a heuristic, and
// bound to be incorrect in some edge cases. The bet is that
// having weird characters in method names is more common than
// having weird characters in filenames, which seems reasonable.
'(\\)?)$'
);
const methodRe = /^(.*?) \[as (.*?)\]$/;
module.exports = StackUtils;