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node_modules/webpack/lib/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";
+
+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.slice(0, nextLine);
+		return firstLine === message ? stack.slice(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;
+};