webpack/lib/dependencies/HarmonyExportDependencyParserPlugin.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 HarmonyExportExpressionDependency = require("./HarmonyExportExpressionDependency");
const HarmonyImportSideEffectDependency = require("./HarmonyImportSideEffectDependency");
const HarmonyExportHeaderDependency = require("./HarmonyExportHeaderDependency");
const HarmonyExportSpecifierDependency = require("./HarmonyExportSpecifierDependency");
const HarmonyExportImportedSpecifierDependency = require("./HarmonyExportImportedSpecifierDependency");
const ConstDependency = require("./ConstDependency");

module.exports = class HarmonyExportDependencyParserPlugin {
	constructor(moduleOptions) {
		this.strictExportPresence = moduleOptions.strictExportPresence;
	}

	apply(parser) {
		parser.hooks.export.tap(
			"HarmonyExportDependencyParserPlugin",
			statement => {
				const dep = new HarmonyExportHeaderDependency(
					statement.declaration && statement.declaration.range,
					statement.range
				);
				dep.loc = Object.create(statement.loc);
				dep.loc.index = -1;
				parser.state.current.addDependency(dep);
				return true;
			}
		);
		parser.hooks.exportImport.tap(
			"HarmonyExportDependencyParserPlugin",
			(statement, source) => {
				parser.state.lastHarmonyImportOrder =
					(parser.state.lastHarmonyImportOrder || 0) + 1;
				const clearDep = new ConstDependency("", statement.range);
				clearDep.loc = Object.create(statement.loc);
				clearDep.loc.index = -1;
				parser.state.current.addDependency(clearDep);
				const sideEffectDep = new HarmonyImportSideEffectDependency(
					source,
					parser.state.module,
					parser.state.lastHarmonyImportOrder,
					parser.state.harmonyParserScope
				);
				sideEffectDep.loc = Object.create(statement.loc);
				sideEffectDep.loc.index = -1;
				parser.state.current.addDependency(sideEffectDep);
				return true;
			}
		);
		parser.hooks.exportExpression.tap(
			"HarmonyExportDependencyParserPlugin",
			(statement, expr) => {
				const comments = parser.getComments([
					statement.range[0],
					expr.range[0]
				]);
				const dep = new HarmonyExportExpressionDependency(
					parser.state.module,
					expr.range,
					statement.range,
					comments
						.map(c => {
							switch (c.type) {
								case "Block":
									return `/*${c.value}*/`;
								case "Line":
									return `//${c.value}\n`;
							}
							return "";
						})
						.join("")
				);
				dep.loc = Object.create(statement.loc);
				dep.loc.index = -1;
				parser.state.current.addDependency(dep);
				return true;
			}
		);
		parser.hooks.exportDeclaration.tap(
			"HarmonyExportDependencyParserPlugin",
			statement => {}
		);
		parser.hooks.exportSpecifier.tap(
			"HarmonyExportDependencyParserPlugin",
			(statement, id, name, idx) => {
				const rename = parser.scope.renames.get(id);
				let dep;
				const harmonyNamedExports = (parser.state.harmonyNamedExports =
					parser.state.harmonyNamedExports || new Set());
				harmonyNamedExports.add(name);
				if (rename === "imported var") {
					const settings = parser.state.harmonySpecifier.get(id);
					dep = new HarmonyExportImportedSpecifierDependency(
						settings.source,
						parser.state.module,
						settings.sourceOrder,
						parser.state.harmonyParserScope,
						settings.id,
						name,
						harmonyNamedExports,
						null,
						this.strictExportPresence
					);
				} else {
					dep = new HarmonyExportSpecifierDependency(
						parser.state.module,
						id,
						name
					);
				}
				dep.loc = Object.create(statement.loc);
				dep.loc.index = idx;
				parser.state.current.addDependency(dep);
				return true;
			}
		);
		parser.hooks.exportImportSpecifier.tap(
			"HarmonyExportDependencyParserPlugin",
			(statement, source, id, name, idx) => {
				const harmonyNamedExports = (parser.state.harmonyNamedExports =
					parser.state.harmonyNamedExports || new Set());
				let harmonyStarExports = null;
				if (name) {
					harmonyNamedExports.add(name);
				} else {
					harmonyStarExports = parser.state.harmonyStarExports =
						parser.state.harmonyStarExports || [];
				}
				const dep = new HarmonyExportImportedSpecifierDependency(
					source,
					parser.state.module,
					parser.state.lastHarmonyImportOrder,
					parser.state.harmonyParserScope,
					id,
					name,
					harmonyNamedExports,
					harmonyStarExports && harmonyStarExports.slice(),
					this.strictExportPresence
				);
				if (harmonyStarExports) {
					harmonyStarExports.push(dep);
				}
				dep.loc = Object.create(statement.loc);
				dep.loc.index = idx;
				parser.state.current.addDependency(dep);
				return true;
			}
		);
	}
};