webpack/lib/formatLocation.js

Packs ECMAScript/CommonJs/AMD modules for the browser. Allows you to split your codebase into multiple bundles, which can be loaded on demand. Supports 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";

/** @typedef {import("./Dependency").DependencyLocation} DependencyLocation */
/** @typedef {import("./Dependency").SourcePosition} SourcePosition */

/**
 * @param {SourcePosition} pos position
 * @returns {string} formatted position
 */
const formatPosition = pos => {
	if (pos && typeof pos === "object") {
		if ("line" in pos && "column" in pos) {
			return `${pos.line}:${pos.column}`;
		} else if ("line" in pos) {
			return `${pos.line}:?`;
		}
	}
	return "";
};

/**
 * @param {DependencyLocation} loc location
 * @returns {string} formatted location
 */
const formatLocation = loc => {
	if (loc && typeof loc === "object") {
		if ("start" in loc && loc.start && "end" in loc && loc.end) {
			if (
				typeof loc.start === "object" &&
				typeof loc.start.line === "number" &&
				typeof loc.end === "object" &&
				typeof loc.end.line === "number" &&
				typeof loc.end.column === "number" &&
				loc.start.line === loc.end.line
			) {
				return `${formatPosition(loc.start)}-${loc.end.column}`;
			} else if (
				typeof loc.start === "object" &&
				typeof loc.start.line === "number" &&
				typeof loc.start.column !== "number" &&
				typeof loc.end === "object" &&
				typeof loc.end.line === "number" &&
				typeof loc.end.column !== "number"
			) {
				return `${loc.start.line}-${loc.end.line}`;
			} else {
				return `${formatPosition(loc.start)}-${formatPosition(loc.end)}`;
			}
		}
		if ("start" in loc && loc.start) {
			return formatPosition(loc.start);
		}
		if ("name" in loc && "index" in loc) {
			return `${loc.name}[${loc.index}]`;
		}
		if ("name" in loc) {
			return loc.name;
		}
	}
	return "";
};

module.exports = formatLocation;