chushihua

node_modules/webpack/lib/dependencies/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.plugin("call require.context", expr => {
+			let regExp = /^\.\/.*$/;
+			let recursive = true;
+			let asyncMode;
+			switch(expr.arguments.length) {
+				case 4:
+					{
+						const asyncModeExpr = parser.evaluateExpression(expr.arguments[3]);
+						if(!asyncModeExpr.isString()) return;
+						asyncMode = asyncModeExpr.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(requestExpr.string, recursive, regExp, asyncMode, expr.range);
+						dep.loc = expr.loc;
+						dep.optional = parser.scope.inTry;
+						parser.state.current.addDependency(dep);
+						return true;
+					}
+			}
+		});
+	}
+};