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rOACCT/node_modules/webpack/lib/wasm-async/AsyncWasmChunkLoadingRuntimeModule.js
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AsyncWasmChunkLoadingRuntimeModule.js
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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const RuntimeGlobals = require("../RuntimeGlobals");
const RuntimeModule = require("../RuntimeModule");
const Template = require("../Template");
class AsyncWasmChunkLoadingRuntimeModule extends RuntimeModule {
constructor({ generateLoadBinaryCode, supportsStreaming }) {
super("wasm chunk loading", RuntimeModule.STAGE_ATTACH);
this.generateLoadBinaryCode = generateLoadBinaryCode;
this.supportsStreaming = supportsStreaming;
}
/**
* @returns {string} runtime code
*/
generate() {
const { compilation, chunk } = this;
const { outputOptions, runtimeTemplate } = compilation;
const fn = RuntimeGlobals.instantiateWasm;
const wasmModuleSrcPath = compilation.getPath(
JSON.stringify(outputOptions.webassemblyModuleFilename),
{
hash: `" + ${RuntimeGlobals.getFullHash}() + "`,
hashWithLength: length =>
`" + ${RuntimeGlobals.getFullHash}}().slice(0, ${length}) + "`,
module: {
id: '" + wasmModuleId + "',
hash: `" + wasmModuleHash + "`,
hashWithLength(length) {
return `" + wasmModuleHash.slice(0, ${length}) + "`;
}
},
runtime: chunk.runtime
}
);
return `${fn} = ${runtimeTemplate.basicFunction(
"exports, wasmModuleId, wasmModuleHash, importsObj",
[
`var req = ${this.generateLoadBinaryCode(wasmModuleSrcPath)};`,
this.supportsStreaming
? Template.asString([
"if (typeof WebAssembly.instantiateStreaming === 'function') {",
Template.indent([
"return WebAssembly.instantiateStreaming(req, importsObj)",
Template.indent([
`.then(${runtimeTemplate.returningFunction(
"Object.assign(exports, res.instance.exports)",
"res"
)});`
])
]),
"}"
])
: "// no support for streaming compilation",
"return req",
Template.indent([
`.then(${runtimeTemplate.returningFunction("x.arrayBuffer()", "x")})`,
`.then(${runtimeTemplate.returningFunction(
"WebAssembly.instantiate(bytes, importsObj)",
"bytes"
)})`,
`.then(${runtimeTemplate.returningFunction(
"Object.assign(exports, res.instance.exports)",
"res"
)});`
])
]
)};`;
}
}
module.exports = AsyncWasmChunkLoadingRuntimeModule;
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