ErrorHelpers.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const loaderFlag = "LOADER_EXECUTION";
const webpackOptionsFlag = "WEBPACK_OPTIONS";
/**
* @param {string} stack stack trace
* @param {string} flag flag to cut off
* @returns {string} stack trace without the specified flag included
*/
const cutOffByFlag = (stack, flag) => {
const errorStack = stack.split("\n");
for (let i = 0; i < errorStack.length; i++) {
if (errorStack[i].includes(flag)) {
errorStack.length = i;
}
}
return errorStack.join("\n");
};
/**
* @param {string} stack stack trace
* @returns {string} stack trace without the loader execution flag included
*/
const cutOffLoaderExecution = stack => cutOffByFlag(stack, loaderFlag);
/**
* @param {string} stack stack trace
* @returns {string} stack trace without the webpack options flag included
*/
const cutOffWebpackOptions = stack => cutOffByFlag(stack, webpackOptionsFlag);
/**
* @param {string} stack stack trace
* @param {string} message error message
* @returns {string} stack trace without the message included
*/
const cutOffMultilineMessage = (stack, message) => {
const stackSplitByLines = stack.split("\n");
const messageSplitByLines = message.split("\n");
const result = [];
stackSplitByLines.forEach((line, idx) => {
if (!line.includes(messageSplitByLines[idx])) result.push(line);
});
return result.join("\n");
};
/**
* @param {string} stack stack trace
* @param {string} message error message
* @returns {string} stack trace without the message included
*/
const cutOffMessage = (stack, message) => {
const nextLine = stack.indexOf("\n");
if (nextLine === -1) {
return stack === message ? "" : stack;
} else {
const firstLine = stack.slice(0, nextLine);
return firstLine === message ? stack.slice(nextLine + 1) : stack;
}
};
/**
* @param {string} stack stack trace
* @param {string} message error message
* @returns {string} stack trace without the loader execution flag and message included
*/
const cleanUp = (stack, message) => {
stack = cutOffLoaderExecution(stack);
stack = cutOffMessage(stack, message);
return stack;
};
/**
* @param {string} stack stack trace
* @param {string} message error message
* @returns {string} stack trace without the webpack options flag and message included
*/
const cleanUpWebpackOptions = (stack, message) => {
stack = cutOffWebpackOptions(stack);
stack = cutOffMultilineMessage(stack, message);
return stack;
};
exports.cutOffByFlag = cutOffByFlag;
exports.cutOffLoaderExecution = cutOffLoaderExecution;
exports.cutOffWebpackOptions = cutOffWebpackOptions;
exports.cutOffMultilineMessage = cutOffMultilineMessage;
exports.cutOffMessage = cutOffMessage;
exports.cleanUp = cleanUp;
exports.cleanUpWebpackOptions = cleanUpWebpackOptions;