'use strict';
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const ErrorStackParser = require('error-stack-parser');
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const RequestShortener = require("webpack/lib/RequestShortener");
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// TODO: allow the location to be customized in options
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const requestShortener = new RequestShortener(process.cwd());
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/*
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This logic is mostly duplicated from webpack/lib/Stats.js#toJson()
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See: https://github.com/webpack/webpack/blob/2f618e733aab4755deb42e9d8e859609005607c0/lib/Stats.js#L89
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*/
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function extractError (e) {
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return {
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message: e.message,
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file: getFile(e),
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origin: getOrigin(e),
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name: e.name,
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severity: 0,
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webpackError: e,
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originalStack: getOriginalErrorStack(e)
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};
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}
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function getOriginalErrorStack(e) {
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while (e.error != null) {
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e = e.error;
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}
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if (e.stack) {
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return ErrorStackParser.parse(e);
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}
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return [];
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}
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function getFile (e) {
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if (e.file) {
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return e.file;
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} else if (e.module && e.module.readableIdentifier && typeof e.module.readableIdentifier === "function") {
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return e.module.readableIdentifier(requestShortener);
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}
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}
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function getOrigin (e) {
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let origin = '';
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if (e.dependencies && e.origin) {
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origin += '\n @ ' + e.origin.readableIdentifier(requestShortener);
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e.dependencies.forEach(function (dep) {
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if (!dep.loc) return;
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if (typeof dep.loc === "string") return;
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if (!dep.loc.start) return;
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if (!dep.loc.end) return;
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origin += ' ' + dep.loc.start.line + ':' + dep.loc.start.column + '-' +
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(dep.loc.start.line !== dep.loc.end.line ? dep.loc.end.line + ':' : '') + dep.loc.end.column;
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});
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var current = e.origin;
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while (current.issuer && typeof current.issuer.readableIdentifier === 'function') {
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current = current.issuer;
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origin += '\n @ ' + current.readableIdentifier(requestShortener);
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}
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}
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return origin;
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}
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module.exports = extractError;
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