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app_vue/node_modules/webpack/lib/dependencies/RequireEnsureDependenciesBlockParserPlugin.js

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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const RequireEnsureDependenciesBlock = require("./RequireEnsureDependenciesBlock");
+const RequireEnsureDependency = require("./RequireEnsureDependency");
+const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
+const getFunctionExpression = require("./getFunctionExpression");
+
+/** @typedef {import("../AsyncDependenciesBlock").GroupOptions} GroupOptions */
+/** @typedef {import("../ChunkGroup").ChunkGroupOptions} ChunkGroupOptions */
+/** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
+/** @typedef {import("../javascript/BasicEvaluatedExpression")} BasicEvaluatedExpression */
+/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
+/** @typedef {import("../javascript/JavascriptParser").Range} Range */
+
+const PLUGIN_NAME = "RequireEnsureDependenciesBlockParserPlugin";
+
+module.exports = class RequireEnsureDependenciesBlockParserPlugin {
+	/**
+	 * @param {JavascriptParser} parser the parser
+	 * @returns {void}
+	 */
+	apply(parser) {
+		parser.hooks.call.for("require.ensure").tap(PLUGIN_NAME, expr => {
+			/** @type {string | GroupOptions | null} */
+			let chunkName = null;
+			let errorExpressionArg = null;
+			let errorExpression = null;
+			switch (expr.arguments.length) {
+				case 4: {
+					const chunkNameExpr = parser.evaluateExpression(expr.arguments[3]);
+					if (!chunkNameExpr.isString()) return;
+					chunkName =
+						/** @type {string} */
+						(chunkNameExpr.string);
+				}
+				// falls through
+				case 3: {
+					errorExpressionArg = expr.arguments[2];
+					errorExpression = getFunctionExpression(errorExpressionArg);
+
+					if (!errorExpression && !chunkName) {
+						const chunkNameExpr = parser.evaluateExpression(expr.arguments[2]);
+						if (!chunkNameExpr.isString()) return;
+						chunkName =
+							/** @type {string} */
+							(chunkNameExpr.string);
+					}
+				}
+				// falls through
+				case 2: {
+					const dependenciesExpr = parser.evaluateExpression(expr.arguments[0]);
+					const dependenciesItems = /** @type {BasicEvaluatedExpression[]} */ (
+						dependenciesExpr.isArray()
+							? dependenciesExpr.items
+							: [dependenciesExpr]
+					);
+					const successExpressionArg = expr.arguments[1];
+					const successExpression = getFunctionExpression(successExpressionArg);
+
+					if (successExpression) {
+						parser.walkExpressions(successExpression.expressions);
+					}
+					if (errorExpression) {
+						parser.walkExpressions(errorExpression.expressions);
+					}
+
+					const depBlock = new RequireEnsureDependenciesBlock(
+						chunkName,
+						/** @type {DependencyLocation} */
+						(expr.loc)
+					);
+					const errorCallbackExists =
+						expr.arguments.length === 4 ||
+						(!chunkName && expr.arguments.length === 3);
+					const dep = new RequireEnsureDependency(
+						/** @type {Range} */ (expr.range),
+						/** @type {Range} */ (expr.arguments[1].range),
+						errorCallbackExists &&
+							/** @type {Range} */ (expr.arguments[2].range)
+					);
+					dep.loc = /** @type {DependencyLocation} */ (expr.loc);
+					depBlock.addDependency(dep);
+					const old = parser.state.current;
+					parser.state.current = /** @type {TODO} */ (depBlock);
+					try {
+						let failed = false;
+						parser.inScope([], () => {
+							for (const ee of dependenciesItems) {
+								if (ee.isString()) {
+									const ensureDependency = new RequireEnsureItemDependency(
+										/** @type {string} */ (ee.string)
+									);
+									ensureDependency.loc =
+										/** @type {DependencyLocation} */
+										(expr.loc);
+									depBlock.addDependency(ensureDependency);
+								} else {
+									failed = true;
+								}
+							}
+						});
+						if (failed) {
+							return;
+						}
+						if (successExpression) {
+							if (successExpression.fn.body.type === "BlockStatement") {
+								// Opt-out of Dead Control Flow detection for this block
+								const oldTerminated = parser.scope.terminated;
+								parser.walkStatement(successExpression.fn.body);
+								parser.scope.terminated = oldTerminated;
+							} else {
+								parser.walkExpression(successExpression.fn.body);
+							}
+						}
+						old.addBlock(depBlock);
+					} finally {
+						parser.state.current = old;
+					}
+					if (!successExpression) {
+						parser.walkExpression(successExpressionArg);
+					}
+					if (errorExpression) {
+						if (errorExpression.fn.body.type === "BlockStatement") {
+							parser.walkStatement(errorExpression.fn.body);
+						} else {
+							parser.walkExpression(errorExpression.fn.body);
+						}
+					} else if (errorExpressionArg) {
+						parser.walkExpression(errorExpressionArg);
+					}
+					return true;
+				}
+			}
+		});
+	}
+};