source: trip-planner-front/node_modules/webpack/lib/node/ReadFileCompileWasmPlugin.js@ 6c1585f

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Tobias Koppers @sokra
*/

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");
const Template = require("../Template");
const WasmChunkLoadingRuntimeModule = require("../wasm-sync/WasmChunkLoadingRuntimeModule");

/** @typedef {import("../Compiler")} Compiler */

// TODO webpack 6 remove

class ReadFileCompileWasmPlugin {
        constructor(options) {
                this.options = options || {};
        }

        /**
         * Apply the plugin
         * @param {Compiler} compiler the compiler instance
         * @returns {void}
         */
        apply(compiler) {
                compiler.hooks.thisCompilation.tap(
                        "ReadFileCompileWasmPlugin",
                        compilation => {
                                const globalWasmLoading = compilation.outputOptions.wasmLoading;
                                const isEnabledForChunk = chunk => {
                                        const options = chunk.getEntryOptions();
                                        const wasmLoading =
                                                options && options.wasmLoading !== undefined
                                                        ? options.wasmLoading
                                                        : globalWasmLoading;
                                        return wasmLoading === "async-node";
                                };
                                const generateLoadBinaryCode = path =>
                                        Template.asString([
                                                "new Promise(function (resolve, reject) {",
                                                Template.indent([
                                                        "var { readFile } = require('fs');",
                                                        "var { join } = require('path');",
                                                        "",
                                                        "try {",
                                                        Template.indent([
                                                                `readFile(join(__dirname, ${path}), function(err, buffer){`,
                                                                Template.indent([
                                                                        "if (err) return reject(err);",
                                                                        "",
                                                                        "// Fake fetch response",
                                                                        "resolve({",
                                                                        Template.indent(["arrayBuffer() { return buffer; }"]),
                                                                        "});"
                                                                ]),
                                                                "});"
                                                        ]),
                                                        "} catch (err) { reject(err); }"
                                                ]),
                                                "})"
                                        ]);

                                compilation.hooks.runtimeRequirementInTree
                                        .for(RuntimeGlobals.ensureChunkHandlers)
                                        .tap("ReadFileCompileWasmPlugin", (chunk, set) => {
                                                if (!isEnabledForChunk(chunk)) return;
                                                const chunkGraph = compilation.chunkGraph;
                                                if (
                                                        !chunkGraph.hasModuleInGraph(
                                                                chunk,
                                                                m => m.type === "webassembly/sync"
                                                        )
                                                ) {
                                                        return;
                                                }
                                                set.add(RuntimeGlobals.moduleCache);
                                                compilation.addRuntimeModule(
                                                        chunk,
                                                        new WasmChunkLoadingRuntimeModule({
                                                                generateLoadBinaryCode,
                                                                supportsStreaming: false,
                                                                mangleImports: this.options.mangleImports
                                                        })
                                                );
                                        });
                        }
                );
        }
}

module.exports = ReadFileCompileWasmPlugin;