webpack/lib/node/nodeConsole.js

/*
	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");

const tty = process.stderr.isTTY && process.env.TERM !== "dumb";

let currentStatusMessage = undefined;
let hasStatusMessage = false;
let currentIndent = "";
let currentCollapsed = 0;

const indent = (colors, 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) {
		process.stderr.write("\x1b[2K\r");
		hasStatusMessage = false;
	}
};

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

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

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

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

	return {
		log: writeColored(colors, "    ", "\u001b[1m", "\u001b[22m"),
		debug: writeColored(colors, "    ", "", ""),
		trace: writeColored(colors, "    ", "", ""),
		info: writeColored(
			colors,
			"<i> ",
			"\u001b[1m\u001b[32m",
			"\u001b[39m\u001b[22m"
		),
		warn: writeColored(
			colors,
			"<w> ",
			"\u001b[1m\u001b[33m",
			"\u001b[39m\u001b[22m"
		),
		error: writeColored(
			colors,
			"<e> ",
			"\u001b[1m\u001b[31m",
			"\u001b[39m\u001b[22m"
		),
		logTime: writeColored(
			colors,
			"<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:
			tty &&
			// 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: tty
			? (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();
					}
			  }
			: writeColored(colors, "<s> ", "", "")
	};
};