RequireContextDependencyParserPlugin.js
a00ef2159c6ereact18

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

			"use strict";

			const RequireContextDependency = require("./RequireContextDependency");

			module.exports = class RequireContextDependencyParserPlugin {
			apply(parser) {
			parser.hooks.call
			.for("require.context")
			.tap("RequireContextDependencyParserPlugin", expr => {
			let regExp = /^\.\/.*$/;
			let recursive = true;
			let mode = "sync";
			switch (expr.arguments.length) {
			case 4: {
			const modeExpr = parser.evaluateExpression(expr.arguments[3]);
			if (!modeExpr.isString()) return;
			mode = modeExpr.string;
			}
			// falls through
			case 3: {
			const regExpExpr = parser.evaluateExpression(expr.arguments[2]);
			if (!regExpExpr.isRegExp()) return;
			regExp = regExpExpr.regExp;
			}
			// falls through
			case 2: {
			const recursiveExpr = parser.evaluateExpression(expr.arguments[1]);
			if (!recursiveExpr.isBoolean()) return;
			recursive = recursiveExpr.bool;
			}
			// falls through
			case 1: {
			const requestExpr = parser.evaluateExpression(expr.arguments[0]);
			if (!requestExpr.isString()) return;
			const dep = new RequireContextDependency(
			{
			request: requestExpr.string,
			recursive,
			regExp,
			mode,
			category: "commonjs"
			},
			expr.range
			);
			dep.loc = expr.loc;
			dep.optional = !!parser.scope.inTry;
			parser.state.current.addDependency(dep);
			return true;
			}
			}
			});
			}
			};