webpack/lib/dependencies/LocalModulesHelpers.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 LocalModule = require("./LocalModule");

const lookup = (parent, mod) => {
	if (mod.charAt(0) !== ".") return mod;

	var path = parent.split("/");
	var segments = mod.split("/");
	path.pop();

	for (let i = 0; i < segments.length; i++) {
		const seg = segments[i];
		if (seg === "..") {
			path.pop();
		} else if (seg !== ".") {
			path.push(seg);
		}
	}

	return path.join("/");
};

exports.addLocalModule = (state, name) => {
	if (!state.localModules) {
		state.localModules = [];
	}
	const m = new LocalModule(name, state.localModules.length);
	state.localModules.push(m);
	return m;
};

exports.getLocalModule = (state, name, namedModule) => {
	if (!state.localModules) return null;
	if (namedModule) {
		// resolve dependency name relative to the defining named module
		name = lookup(namedModule, name);
	}
	for (let i = 0; i < state.localModules.length; i++) {
		if (state.localModules[i].name === name) {
			return state.localModules[i];
		}
	}
	return null;
};