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EnableWasmLoadingPlugin.js
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Wed, Feb 5, 13:25

EnableWasmLoadingPlugin.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
/** @typedef {import("../../declarations/WebpackOptions").LibraryOptions} LibraryOptions */
/** @typedef {import("../../declarations/WebpackOptions").WasmLoadingType} WasmLoadingType */
/** @typedef {import("../Compiler")} Compiler */
/** @type {WeakMap<Compiler, Set<WasmLoadingType>>} */
const enabledTypes = new WeakMap();
const getEnabledTypes = compiler => {
let set = enabledTypes.get(compiler);
if (set === undefined) {
set = new Set();
enabledTypes.set(compiler, set);
}
return set;
};
class EnableWasmLoadingPlugin {
/**
* @param {WasmLoadingType} type library type that should be available
*/
constructor(type) {
this.type = type;
}
/**
* @param {Compiler} compiler the compiler instance
* @param {WasmLoadingType} type type of library
* @returns {void}
*/
static setEnabled(compiler, type) {
getEnabledTypes(compiler).add(type);
}
/**
* @param {Compiler} compiler the compiler instance
* @param {WasmLoadingType} type type of library
* @returns {void}
*/
static checkEnabled(compiler, type) {
if (!getEnabledTypes(compiler).has(type)) {
throw new Error(
`Library type "${type}" is not enabled. ` +
"EnableWasmLoadingPlugin need to be used to enable this type of wasm loading. " +
'This usually happens through the "output.enabledWasmLoadingTypes" option. ' +
'If you are using a function as entry which sets "wasmLoading", you need to add all potential library types to "output.enabledWasmLoadingTypes". ' +
Array.from(getEnabledTypes(compiler)).join(", ")
);
}
}
/**
* Apply the plugin
* @param {Compiler} compiler the compiler instance
* @returns {void}
*/
apply(compiler) {
const { type } = this;
// Only enable once
const enabled = getEnabledTypes(compiler);
if (enabled.has(type)) return;
enabled.add(type);
if (typeof type === "string") {
switch (type) {
case "fetch": {
// TODO webpack 6 remove FetchCompileWasmPlugin
const FetchCompileWasmPlugin = require("../web/FetchCompileWasmPlugin");
const FetchCompileAsyncWasmPlugin = require("../web/FetchCompileAsyncWasmPlugin");
new FetchCompileWasmPlugin({
mangleImports: compiler.options.optimization.mangleWasmImports
}).apply(compiler);
new FetchCompileAsyncWasmPlugin().apply(compiler);
break;
}
case "async-node": {
// TODO webpack 6 remove ReadFileCompileWasmPlugin
const ReadFileCompileWasmPlugin = require("../node/ReadFileCompileWasmPlugin");
const ReadFileCompileAsyncWasmPlugin = require("../node/ReadFileCompileAsyncWasmPlugin");
new ReadFileCompileWasmPlugin({
mangleImports: compiler.options.optimization.mangleWasmImports
}).apply(compiler);
new ReadFileCompileAsyncWasmPlugin().apply(compiler);
break;
}
case "universal":
throw new Error(
"Universal WebAssembly Loading is not implemented yet"
);
default:
throw new Error(`Unsupported wasm loading type ${type}.
Plugins which provide custom wasm loading types must call EnableWasmLoadingPlugin.setEnabled(compiler, type) to disable this error.`);
}
} else {
// TODO support plugin instances here
// apply them to the compiler
}
}
}
module.exports = EnableWasmLoadingPlugin;

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