source: trip-planner-front/node_modules/webpack/lib/ErrorHelpers.js@ eed0bf8

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const loaderFlag = "LOADER_EXECUTION";

const webpackOptionsFlag = "WEBPACK_OPTIONS";

exports.cutOffByFlag = (stack, flag) => {
        stack = stack.split("\n");
        for (let i = 0; i < stack.length; i++) {
                if (stack[i].includes(flag)) {
                        stack.length = i;
                }
        }
        return stack.join("\n");
};

exports.cutOffLoaderExecution = stack =>
        exports.cutOffByFlag(stack, loaderFlag);

exports.cutOffWebpackOptions = stack =>
        exports.cutOffByFlag(stack, webpackOptionsFlag);

exports.cutOffMultilineMessage = (stack, message) => {
        stack = stack.split("\n");
        message = message.split("\n");

        const result = [];

        stack.forEach((line, idx) => {
                if (!line.includes(message[idx])) result.push(line);
        });

        return result.join("\n");
};

exports.cutOffMessage = (stack, message) => {
        const nextLine = stack.indexOf("\n");
        if (nextLine === -1) {
                return stack === message ? "" : stack;
        } else {
                const firstLine = stack.substr(0, nextLine);
                return firstLine === message ? stack.substr(nextLine + 1) : stack;
        }
};

exports.cleanUp = (stack, message) => {
        stack = exports.cutOffLoaderExecution(stack);
        stack = exports.cutOffMessage(stack, message);
        return stack;
};

exports.cleanUpWebpackOptions = (stack, message) => {
        stack = exports.cutOffWebpackOptions(stack);
        stack = exports.cutOffMultilineMessage(stack, message);
        return stack;
};