115 lines
3.1 KiB
JavaScript
115 lines
3.1 KiB
JavaScript
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/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Ivan Kopeykin @vankop
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*/
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"use strict";
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const { approve } = require("../javascript/JavascriptParserHelpers");
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const InnerGraph = require("../optimize/InnerGraph");
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const URLDependency = require("./URLDependency");
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/** @typedef {import("estree").NewExpression} NewExpressionNode */
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/** @typedef {import("../Compiler")} Compiler */
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/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
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class URLPlugin {
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/**
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* @param {Compiler} compiler compiler
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*/
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apply(compiler) {
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compiler.hooks.compilation.tap(
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"URLPlugin",
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(compilation, { normalModuleFactory }) => {
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compilation.dependencyFactories.set(URLDependency, normalModuleFactory);
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compilation.dependencyTemplates.set(
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URLDependency,
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new URLDependency.Template()
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);
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/**
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* @param {JavascriptParser} parser parser
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* @param {object} parserOptions options
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*/
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const parserCallback = (parser, parserOptions) => {
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if (parserOptions.url === false) return;
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const relative = parserOptions.url === "relative";
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/**
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* @param {NewExpressionNode} expr expression
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* @returns {undefined | string} request
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*/
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const getUrlRequest = expr => {
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if (expr.arguments.length !== 2) return;
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const [arg1, arg2] = expr.arguments;
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if (
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arg2.type !== "MemberExpression" ||
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arg1.type === "SpreadElement"
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)
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return;
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const chain = parser.extractMemberExpressionChain(arg2);
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if (
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chain.members.length !== 1 ||
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chain.object.type !== "MetaProperty" ||
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chain.object.meta.name !== "import" ||
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chain.object.property.name !== "meta" ||
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chain.members[0] !== "url"
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)
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return;
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const request = parser.evaluateExpression(arg1).asString();
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return request;
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};
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parser.hooks.canRename.for("URL").tap("URLPlugin", approve);
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parser.hooks.new.for("URL").tap("URLPlugin", _expr => {
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const expr = /** @type {NewExpressionNode} */ (_expr);
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const request = getUrlRequest(expr);
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if (!request) return;
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const [arg1, arg2] = expr.arguments;
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const dep = new URLDependency(
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request,
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[arg1.range[0], arg2.range[1]],
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expr.range,
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relative
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);
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dep.loc = expr.loc;
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parser.state.module.addDependency(dep);
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InnerGraph.onUsage(parser.state, e => (dep.usedByExports = e));
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return true;
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});
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parser.hooks.isPure.for("NewExpression").tap("URLPlugin", _expr => {
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const expr = /** @type {NewExpressionNode} */ (_expr);
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const { callee } = expr;
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if (callee.type !== "Identifier") return;
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const calleeInfo = parser.getFreeInfoFromVariable(callee.name);
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if (!calleeInfo || calleeInfo.name !== "URL") return;
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const request = getUrlRequest(expr);
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if (request) return true;
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});
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};
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("URLPlugin", parserCallback);
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normalModuleFactory.hooks.parser
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.for("javascript/esm")
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.tap("URLPlugin", parserCallback);
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}
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);
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}
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}
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module.exports = URLPlugin;
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