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