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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const { pathToFileURL } = require("url");
const AsyncDependenciesBlock = require("../AsyncDependenciesBlock");
const CommentCompilationWarning = require("../CommentCompilationWarning");
const {
JAVASCRIPT_MODULE_TYPE_AUTO,
JAVASCRIPT_MODULE_TYPE_ESM
} = require("../ModuleTypeConstants");
const UnsupportedFeatureWarning = require("../UnsupportedFeatureWarning");
const EnableChunkLoadingPlugin = require("../javascript/EnableChunkLoadingPlugin");
const { equals } = require("../util/ArrayHelpers");
const createHash = require("../util/createHash");
const { contextify } = require("../util/identifier");
const EnableWasmLoadingPlugin = require("../wasm/EnableWasmLoadingPlugin");
const ConstDependency = require("./ConstDependency");
const CreateScriptUrlDependency = require("./CreateScriptUrlDependency");
const {
harmonySpecifierTag
} = require("./HarmonyImportDependencyParserPlugin");
const WorkerDependency = require("./WorkerDependency");
/** @typedef {import("estree").CallExpression} CallExpression */
/** @typedef {import("estree").Expression} Expression */
/** @typedef {import("estree").Identifier} Identifier */
/** @typedef {import("estree").MemberExpression} MemberExpression */
/** @typedef {import("estree").ObjectExpression} ObjectExpression */
/** @typedef {import("estree").Pattern} Pattern */
/** @typedef {import("estree").Property} Property */
/** @typedef {import("estree").SpreadElement} SpreadElement */
/** @typedef {import("../../declarations/WebpackOptions").ChunkLoading} ChunkLoading */
/** @typedef {import("../../declarations/WebpackOptions").HashFunction} HashFunction */
/** @typedef {import("../../declarations/WebpackOptions").JavascriptParserOptions} JavascriptParserOptions */
/** @typedef {import("../../declarations/WebpackOptions").OutputModule} OutputModule */
/** @typedef {import("../../declarations/WebpackOptions").WasmLoading} WasmLoading */
/** @typedef {import("../../declarations/WebpackOptions").WorkerPublicPath} WorkerPublicPath */
/** @typedef {import("../Compiler")} Compiler */
/** @typedef {import("../Dependency").DependencyLocation} DependencyLocation */
/** @typedef {import("../Entrypoint").EntryOptions} EntryOptions */
/** @typedef {import("../NormalModule")} NormalModule */
/** @typedef {import("../Parser").ParserState} ParserState */
/** @typedef {import("../javascript/BasicEvaluatedExpression")} BasicEvaluatedExpression */
/** @typedef {import("../javascript/JavascriptParser")} JavascriptParser */
/** @typedef {import("../javascript/JavascriptParser")} Parser */
/** @typedef {import("../javascript/JavascriptParser").Range} Range */
/** @typedef {import("./HarmonyImportDependencyParserPlugin").HarmonySettings} HarmonySettings */
/**
* @param {NormalModule} module module
* @returns {string} url
*/
const getUrl = module => pathToFileURL(module.resource).toString();
const WorkerSpecifierTag = Symbol("worker specifier tag");
const DEFAULT_SYNTAX = [
"Worker",
"SharedWorker",
"navigator.serviceWorker.register()",
"Worker from worker_threads"
];
/** @type {WeakMap<ParserState, number>} */
const workerIndexMap = new WeakMap();
const PLUGIN_NAME = "WorkerPlugin";
class WorkerPlugin {
/**
* @param {ChunkLoading=} chunkLoading chunk loading
* @param {WasmLoading=} wasmLoading wasm loading
* @param {OutputModule=} module output module
* @param {WorkerPublicPath=} workerPublicPath worker public path
*/
constructor(chunkLoading, wasmLoading, module, workerPublicPath) {
this._chunkLoading = chunkLoading;
this._wasmLoading = wasmLoading;
this._module = module;
this._workerPublicPath = workerPublicPath;
}
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
if (this._chunkLoading) {
new EnableChunkLoadingPlugin(this._chunkLoading).apply(compiler);
}
if (this._wasmLoading) {
new EnableWasmLoadingPlugin(this._wasmLoading).apply(compiler);
}
const cachedContextify = contextify.bindContextCache(
compiler.context,
compiler.root
);
compiler.hooks.thisCompilation.tap(
PLUGIN_NAME,
(compilation, { normalModuleFactory }) => {
compilation.dependencyFactories.set(
WorkerDependency,
normalModuleFactory
);
compilation.dependencyTemplates.set(
WorkerDependency,
new WorkerDependency.Template()
);
compilation.dependencyTemplates.set(
CreateScriptUrlDependency,
new CreateScriptUrlDependency.Template()
);
/**
* @param {JavascriptParser} parser the parser
* @param {Expression} expr expression
* @returns {[string, Range] | void} parsed
*/
const parseModuleUrl = (parser, expr) => {
if (expr.type !== "NewExpression" || expr.callee.type === "Super") {
return;
}
if (
expr.arguments.length === 1 &&
expr.arguments[0].type === "MemberExpression" &&
isMetaUrl(parser, expr.arguments[0])
) {
const arg1 = expr.arguments[0];
return [
getUrl(parser.state.module),
[
/** @type {Range} */ (arg1.range)[0],
/** @type {Range} */ (arg1.range)[1]
]
];
} else if (expr.arguments.length === 2) {
const [arg1, arg2] = expr.arguments;
if (arg1.type === "SpreadElement") return;
if (arg2.type === "SpreadElement") return;
const callee = parser.evaluateExpression(expr.callee);
if (!callee.isIdentifier() || callee.identifier !== "URL") return;
const arg2Value = parser.evaluateExpression(arg2);
if (
!arg2Value.isString() ||
!(
/** @type {string} */ (arg2Value.string).startsWith("file://")
) ||
arg2Value.string !== getUrl(parser.state.module)
) {
return;
}
const arg1Value = parser.evaluateExpression(arg1);
if (!arg1Value.isString()) return;
return [
/** @type {string} */ (arg1Value.string),
[
/** @type {Range} */ (arg1.range)[0],
/** @type {Range} */ (arg2.range)[1]
]
];
}
};
/**
* @param {JavascriptParser} parser the parser
* @param {MemberExpression} expr expression
* @returns {boolean} is `import.meta.url`
*/
const isMetaUrl = (parser, expr) => {
const chain = parser.extractMemberExpressionChain(expr);
if (
chain.members.length !== 1 ||
chain.object.type !== "MetaProperty" ||
chain.object.meta.name !== "import" ||
chain.object.property.name !== "meta" ||
chain.members[0] !== "url"
) {
return false;
}
return true;
};
/** @typedef {Record<string, EXPECTED_ANY>} Values */
/**
* @param {JavascriptParser} parser the parser
* @param {ObjectExpression} expr expression
* @returns {{ expressions: Record<string, Expression | Pattern>, otherElements: (Property | SpreadElement)[], values: Values, spread: boolean, insertType: "comma" | "single", insertLocation: number }} parsed object
*/
const parseObjectExpression = (parser, expr) => {
/** @type {Values} */
const values = {};
/** @type {Record<string, Expression | Pattern>} */
const expressions = {};
/** @type {(Property | SpreadElement)[]} */
const otherElements = [];
let spread = false;
for (const prop of expr.properties) {
if (prop.type === "SpreadElement") {
spread = true;
} else if (
prop.type === "Property" &&
!prop.method &&
!prop.computed &&
prop.key.type === "Identifier"
) {
expressions[prop.key.name] = prop.value;
if (!prop.shorthand && !prop.value.type.endsWith("Pattern")) {
const value = parser.evaluateExpression(
/** @type {Expression} */
(prop.value)
);
if (value.isCompileTimeValue()) {
values[prop.key.name] = value.asCompileTimeValue();
}
}
} else {
otherElements.push(prop);
}
}
const insertType = expr.properties.length > 0 ? "comma" : "single";
const insertLocation = /** @type {Range} */ (
expr.properties[expr.properties.length - 1].range
)[1];
return {
expressions,
otherElements,
values,
spread,
insertType,
insertLocation
};
};
/**
* @param {Parser} parser parser parser
* @param {JavascriptParserOptions} parserOptions parserOptions
* @returns {void}
*/
const parserPlugin = (parser, parserOptions) => {
if (parserOptions.worker === false) return;
const options = !Array.isArray(parserOptions.worker)
? ["..."]
: parserOptions.worker;
/**
* @param {CallExpression} expr expression
* @returns {boolean | void} true when handled
*/
const handleNewWorker = expr => {
if (expr.arguments.length === 0 || expr.arguments.length > 2) {
return;
}
const [arg1, arg2] = expr.arguments;
if (arg1.type === "SpreadElement") return;
if (arg2 && arg2.type === "SpreadElement") return;
/** @type {string} */
let url;
/** @type {Range} */
let range;
/** @type {boolean} */
let needNewUrl = false;
if (arg1.type === "MemberExpression" && isMetaUrl(parser, arg1)) {
url = getUrl(parser.state.module);
range = [
/** @type {Range} */ (arg1.range)[0],
/** @type {Range} */ (arg1.range)[1]
];
needNewUrl = true;
} else {
const parsedUrl = parseModuleUrl(parser, arg1);
if (!parsedUrl) return;
[url, range] = parsedUrl;
}
const {
expressions,
otherElements,
values: options,
spread: hasSpreadInOptions,
insertType,
insertLocation
} = arg2 && arg2.type === "ObjectExpression"
? parseObjectExpression(parser, arg2)
: {
/** @type {Record<string, Expression | Pattern>} */
expressions: {},
otherElements: [],
/** @type {Values} */
values: {},
spread: false,
insertType: arg2 ? "spread" : "argument",
insertLocation: arg2
? /** @type {Range} */ (arg2.range)
: /** @type {Range} */ (arg1.range)[1]
};
const { options: importOptions, errors: commentErrors } =
parser.parseCommentOptions(/** @type {Range} */ (expr.range));
if (commentErrors) {
for (const e of commentErrors) {
const { comment } = e;
parser.state.module.addWarning(
new CommentCompilationWarning(
`Compilation error while processing magic comment(-s): /*${comment.value}*/: ${e.message}`,
/** @type {DependencyLocation} */ (comment.loc)
)
);
}
}
/** @type {EntryOptions} */
const entryOptions = {};
if (importOptions) {
if (importOptions.webpackIgnore !== undefined) {
if (typeof importOptions.webpackIgnore !== "boolean") {
parser.state.module.addWarning(
new UnsupportedFeatureWarning(
`\`webpackIgnore\` expected a boolean, but received: ${importOptions.webpackIgnore}.`,
/** @type {DependencyLocation} */ (expr.loc)
)
);
} else if (importOptions.webpackIgnore) {
return false;
}
}
if (importOptions.webpackEntryOptions !== undefined) {
if (
typeof importOptions.webpackEntryOptions !== "object" ||
importOptions.webpackEntryOptions === null
) {
parser.state.module.addWarning(
new UnsupportedFeatureWarning(
`\`webpackEntryOptions\` expected a object, but received: ${importOptions.webpackEntryOptions}.`,
/** @type {DependencyLocation} */ (expr.loc)
)
);
} else {
Object.assign(
entryOptions,
importOptions.webpackEntryOptions
);
}
}
if (importOptions.webpackChunkName !== undefined) {
if (typeof importOptions.webpackChunkName !== "string") {
parser.state.module.addWarning(
new UnsupportedFeatureWarning(
`\`webpackChunkName\` expected a string, but received: ${importOptions.webpackChunkName}.`,
/** @type {DependencyLocation} */ (expr.loc)
)
);
} else {
entryOptions.name = importOptions.webpackChunkName;
}
}
}
if (
!Object.prototype.hasOwnProperty.call(entryOptions, "name") &&
options &&
typeof options.name === "string"
) {
entryOptions.name = options.name;
}
if (entryOptions.runtime === undefined) {
const i = workerIndexMap.get(parser.state) || 0;
workerIndexMap.set(parser.state, i + 1);
const name = `${cachedContextify(
parser.state.module.identifier()
)}|${i}`;
const hash = createHash(
/** @type {HashFunction} */
(compilation.outputOptions.hashFunction)
);
hash.update(name);
const digest =
/** @type {string} */
(hash.digest(compilation.outputOptions.hashDigest));
entryOptions.runtime = digest.slice(
0,
compilation.outputOptions.hashDigestLength
);
}
const block = new AsyncDependenciesBlock({
name: entryOptions.name,
entryOptions: {
chunkLoading: this._chunkLoading,
wasmLoading: this._wasmLoading,
...entryOptions
}
});
block.loc = expr.loc;
const dep = new WorkerDependency(url, range, {
publicPath: this._workerPublicPath,
needNewUrl
});
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
block.addDependency(dep);
parser.state.module.addBlock(block);
if (compilation.outputOptions.trustedTypes) {
const dep = new CreateScriptUrlDependency(
/** @type {Range} */ (expr.arguments[0].range)
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addDependency(dep);
}
if (expressions.type) {
const expr = expressions.type;
if (options.type !== false) {
const dep = new ConstDependency(
this._module ? '"module"' : "undefined",
/** @type {Range} */ (expr.range)
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
/** @type {EXPECTED_ANY} */
(expressions).type = undefined;
}
} else if (insertType === "comma") {
if (this._module || hasSpreadInOptions) {
const dep = new ConstDependency(
`, type: ${this._module ? '"module"' : "undefined"}`,
insertLocation
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
}
} else if (insertType === "spread") {
const dep1 = new ConstDependency(
"Object.assign({}, ",
/** @type {Range} */ (insertLocation)[0]
);
const dep2 = new ConstDependency(
`, { type: ${this._module ? '"module"' : "undefined"} })`,
/** @type {Range} */ (insertLocation)[1]
);
dep1.loc = /** @type {DependencyLocation} */ (expr.loc);
dep2.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep1);
parser.state.module.addPresentationalDependency(dep2);
} else if (insertType === "argument" && this._module) {
const dep = new ConstDependency(
', { type: "module" }',
insertLocation
);
dep.loc = /** @type {DependencyLocation} */ (expr.loc);
parser.state.module.addPresentationalDependency(dep);
}
parser.walkExpression(expr.callee);
for (const key of Object.keys(expressions)) {
if (expressions[key]) {
if (expressions[key].type.endsWith("Pattern")) continue;
parser.walkExpression(
/** @type {Expression} */
(expressions[key])
);
}
}
for (const prop of otherElements) {
parser.walkProperty(prop);
}
if (insertType === "spread") {
parser.walkExpression(arg2);
}
return true;
};
/**
* @param {string} item item
*/
const processItem = item => {
if (
item.startsWith("*") &&
item.includes(".") &&
item.endsWith("()")
) {
const firstDot = item.indexOf(".");
const pattern = item.slice(1, firstDot);
const itemMembers = item.slice(firstDot + 1, -2);
parser.hooks.preDeclarator.tap(
PLUGIN_NAME,
(decl, _statement) => {
if (
decl.id.type === "Identifier" &&
decl.id.name === pattern
) {
parser.tagVariable(decl.id.name, WorkerSpecifierTag);
return true;
}
}
);
parser.hooks.pattern.for(pattern).tap(PLUGIN_NAME, pattern => {
parser.tagVariable(pattern.name, WorkerSpecifierTag);
return true;
});
parser.hooks.callMemberChain
.for(WorkerSpecifierTag)
.tap(PLUGIN_NAME, (expression, members) => {
if (itemMembers !== members.join(".")) {
return;
}
return handleNewWorker(expression);
});
} else if (item.endsWith("()")) {
parser.hooks.call
.for(item.slice(0, -2))
.tap(PLUGIN_NAME, handleNewWorker);
} else {
const match = /^(.+?)(\(\))?\s+from\s+(.+)$/.exec(item);
if (match) {
const ids = match[1].split(".");
const call = match[2];
const source = match[3];
(call ? parser.hooks.call : parser.hooks.new)
.for(harmonySpecifierTag)
.tap(PLUGIN_NAME, expr => {
const settings = /** @type {HarmonySettings} */ (
parser.currentTagData
);
if (
!settings ||
settings.source !== source ||
!equals(settings.ids, ids)
) {
return;
}
return handleNewWorker(expr);
});
} else {
parser.hooks.new.for(item).tap(PLUGIN_NAME, handleNewWorker);
}
}
};
for (const item of options) {
if (item === "...") {
for (const itemFromDefault of DEFAULT_SYNTAX) {
processItem(itemFromDefault);
}
} else {
processItem(item);
}
}
};
normalModuleFactory.hooks.parser
.for(JAVASCRIPT_MODULE_TYPE_AUTO)
.tap(PLUGIN_NAME, parserPlugin);
normalModuleFactory.hooks.parser
.for(JAVASCRIPT_MODULE_TYPE_ESM)
.tap(PLUGIN_NAME, parserPlugin);
}
);
}
}
module.exports = WorkerPlugin;