webpack/lib/node/nodeConsole.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jsx, es7, css, less, ... and your custom stuff.

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

"use strict";

const util = require("util");
const truncateArgs = require("../logging/truncateArgs");

module.exports = ({ colors, appendOnly, stream }) => {
	let currentStatusMessage = undefined;
	let hasStatusMessage = false;
	let currentIndent = "";
	let currentCollapsed = 0;

	const indent = (str, prefix, colorPrefix, colorSuffix) => {
		if (str === "") return str;
		prefix = currentIndent + prefix;
		if (colors) {
			return (
				prefix +
				colorPrefix +
				str.replace(/\n/g, colorSuffix + "\n" + prefix + colorPrefix) +
				colorSuffix
			);
		} else {
			return prefix + str.replace(/\n/g, "\n" + prefix);
		}
	};

	const clearStatusMessage = () => {
		if (hasStatusMessage) {
			stream.write("\x1b[2K\r");
			hasStatusMessage = false;
		}
	};

	const writeStatusMessage = () => {
		if (!currentStatusMessage) return;
		const l = stream.columns;
		const args = l
			? truncateArgs(currentStatusMessage, l - 1)
			: currentStatusMessage;
		const str = args.join(" ");
		const coloredStr = `\u001b[1m${str}\u001b[39m\u001b[22m`;
		stream.write(`\x1b[2K\r${coloredStr}`);
		hasStatusMessage = true;
	};

	const writeColored = (prefix, colorPrefix, colorSuffix) => {
		return (...args) => {
			if (currentCollapsed > 0) return;
			clearStatusMessage();
			const str = indent(
				util.format(...args),
				prefix,
				colorPrefix,
				colorSuffix
			);
			stream.write(str + "\n");
			writeStatusMessage();
		};
	};

	const writeGroupMessage = writeColored(
		"<-> ",
		"\u001b[1m\u001b[36m",
		"\u001b[39m\u001b[22m"
	);

	const writeGroupCollapsedMessage = writeColored(
		"<+> ",
		"\u001b[1m\u001b[36m",
		"\u001b[39m\u001b[22m"
	);

	return {
		log: writeColored("    ", "\u001b[1m", "\u001b[22m"),
		debug: writeColored("    ", "", ""),
		trace: writeColored("    ", "", ""),
		info: writeColored("<i> ", "\u001b[1m\u001b[32m", "\u001b[39m\u001b[22m"),
		warn: writeColored("<w> ", "\u001b[1m\u001b[33m", "\u001b[39m\u001b[22m"),
		error: writeColored("<e> ", "\u001b[1m\u001b[31m", "\u001b[39m\u001b[22m"),
		logTime: writeColored(
			"<t> ",
			"\u001b[1m\u001b[35m",
			"\u001b[39m\u001b[22m"
		),
		group: (...args) => {
			writeGroupMessage(...args);
			if (currentCollapsed > 0) {
				currentCollapsed++;
			} else {
				currentIndent += "  ";
			}
		},
		groupCollapsed: (...args) => {
			writeGroupCollapsedMessage(...args);
			currentCollapsed++;
		},
		groupEnd: () => {
			if (currentCollapsed > 0) currentCollapsed--;
			else if (currentIndent.length >= 2)
				currentIndent = currentIndent.slice(0, currentIndent.length - 2);
		},
		// eslint-disable-next-line node/no-unsupported-features/node-builtins
		profile: console.profile && (name => console.profile(name)),
		// eslint-disable-next-line node/no-unsupported-features/node-builtins
		profileEnd: console.profileEnd && (name => console.profileEnd(name)),
		clear:
			!appendOnly &&
			// eslint-disable-next-line node/no-unsupported-features/node-builtins
			console.clear &&
			(() => {
				clearStatusMessage();
				// eslint-disable-next-line node/no-unsupported-features/node-builtins
				console.clear();
				writeStatusMessage();
			}),
		status: appendOnly
			? writeColored("<s> ", "", "")
			: (name, ...args) => {
					args = args.filter(Boolean);
					if (name === undefined && args.length === 0) {
						clearStatusMessage();
						currentStatusMessage = undefined;
					} else if (
						typeof name === "string" &&
						name.startsWith("[webpack.Progress] ")
					) {
						currentStatusMessage = [name.slice(19), ...args];
						writeStatusMessage();
					} else if (name === "[webpack.Progress]") {
						currentStatusMessage = [...args];
						writeStatusMessage();
					} else {
						currentStatusMessage = [name, ...args];
						writeStatusMessage();
					}
			  }
	};
};