升级到 NativeScript 6 后无法解析 db.worker.js 文件的路径

Question

我有一个 src/app/sqlite/db.ts 文件来处理对数据库的访问。它使用 src/app/util/Utils.ts 创建一个工作池，用于后台处理 (db.worker.js)。

Utils 文件实例化了一个新的 worker，它在 tns 5 上工作，但不在 tns 6 上工作：

https://gitlab.com/thiagoufg/BudgetSMS/blob/master/src/app/util/Utils.ts#L186

一旦应用程序在 android 模拟器上启动，它会给您一个错误，指出它无法加载 db.worker.js file.

我的最后 2 次提交是在 tns 6 上。

下面的提交仍在 tns 5 上并且一切正常：

https://gitlab.com/thiagoufg/BudgetSMS/commit/881854fa619b16e21fe64db0bb4ff6d9a80d82a4

谁能帮我成功加载 db.worker.js 模块？

这是我与大家分享的个人项目。我不打算分享它，但是将 nativescript 升级到更新的版本真的很困难。我基本上必须创建一个新的空白项目并将我的东西从旧版本复制到新版本，因为升级说明对我不起作用。所以我决定分享它，这样你就可以看到你需要看到的任何文件。

此应用违反了 Google 的规则（读取短信），因此无法在 Play 商店中发布。

我尝试将 db.ts 中的 workerPath 更改为：

./db.worker.js
~/app/sqlite/worker.js
和许多其他变化

我尝试过 webpack.config.js、添加 ts-loader、删除 ts-loader、使用 CopyWebpackPlugin、添加 glob 等，使用 NativeScriptWorkerPlugin 等

https://gitlab.com/thiagoufg/BudgetSMS/blob/master/src/app/util/Utils.ts#L186

const MyWorker = require(`nativescript-worker-loader!${workerPath}`);

预期结果：没有错误，应用加载后立即访问 sqlite 数据库。

出现错误：应用加载后：

Cannot find module 'nativescript-worker-loader!./db.worker.js'

Answer 1

更新webpack.config.js到最新

./node_modules/.bin/update-ns-webpack --configs --deps

注意：你不需要ts-loader因为你默认使用JS文件，也不需要new NativeScriptWorkerPlugin({ plugins: [ngCompilerPlugin] })。

webpack.config.js

const { join, relative, resolve, sep, dirname } = require("path");

const webpack = require("webpack");
const nsWebpack = require("nativescript-dev-webpack");
const nativescriptTarget = require("nativescript-dev-webpack/nativescript-target");
const { nsReplaceBootstrap } = require("nativescript-dev-webpack/transformers/ns-replace-bootstrap");
const { nsReplaceLazyLoader } = require("nativescript-dev-webpack/transformers/ns-replace-lazy-loader");
const { nsSupportHmrNg } = require("nativescript-dev-webpack/transformers/ns-support-hmr-ng");
const { getMainModulePath } = require("nativescript-dev-webpack/utils/ast-utils");
const CleanWebpackPlugin = require("clean-webpack-plugin");
const CopyWebpackPlugin = require("copy-webpack-plugin");
const { BundleAnalyzerPlugin } = require("webpack-bundle-analyzer");
const { NativeScriptWorkerPlugin } = require("nativescript-worker-loader/NativeScriptWorkerPlugin");
const TerserPlugin = require("terser-webpack-plugin");
const { getAngularCompilerPlugin } = require("nativescript-dev-webpack/plugins/NativeScriptAngularCompilerPlugin");
const hashSalt = Date.now().toString();

module.exports = env => {
    // Add your custom Activities, Services and other Android app components here.
    const appComponents = [
        "tns-core-modules/ui/frame",
        "tns-core-modules/ui/frame/activity",
    ];

    const platform = env && (env.android && "android" || env.ios && "ios");
    if (!platform) {
        throw new Error("You need to provide a target platform!");
    }

    const AngularCompilerPlugin = getAngularCompilerPlugin(platform);
    const projectRoot = __dirname;

    // Default destination inside platforms/<platform>/...
    const dist = resolve(projectRoot, nsWebpack.getAppPath(platform, projectRoot));

    const {
        // The 'appPath' and 'appResourcesPath' values are fetched from
        // the nsconfig.json configuration file.
        appPath = "src",
        appResourcesPath = "App_Resources",

        // You can provide the following flags when running 'tns run android|ios'
        aot, // --env.aot
        snapshot, // --env.snapshot,
        production, // --env.production
        uglify, // --env.uglify
        report, // --env.report
        sourceMap, // --env.sourceMap
        hiddenSourceMap, // --env.hiddenSourceMap
        hmr, // --env.hmr,
        unitTesting, // --env.unitTesting
        verbose, // --env.verbose
    } = env;

    const isAnySourceMapEnabled = !!sourceMap || !!hiddenSourceMap;
    const externals = nsWebpack.getConvertedExternals(env.externals);
    const appFullPath = resolve(projectRoot, appPath);
    const appResourcesFullPath = resolve(projectRoot, appResourcesPath);
    const tsConfigName = "tsconfig.tns.json";
    const entryModule = `${nsWebpack.getEntryModule(appFullPath, platform)}.ts`;
    const entryPath = `.${sep}${entryModule}`;
    const entries = { bundle: entryPath };
    const areCoreModulesExternal = Array.isArray(env.externals) && env.externals.some(e => e.indexOf("tns-core-modules") > -1);
    if (platform === "ios" && !areCoreModulesExternal) {
        entries["tns_modules/tns-core-modules/inspector_modules"] = "inspector_modules";
    };

    const ngCompilerTransformers = [];
    const additionalLazyModuleResources = [];
    if (aot) {
        ngCompilerTransformers.push(nsReplaceBootstrap);
    }

    if (hmr) {
        ngCompilerTransformers.push(nsSupportHmrNg);
    }

    // when "@angular/core" is external, it's not included in the bundles. In this way, it will be used
    // directly from node_modules and the Angular modules loader won't be able to resolve the lazy routes
    // fixes https://github.com/NativeScript/nativescript-cli/issues/4024
    if (env.externals && env.externals.indexOf("@angular/core") > -1) {
        const appModuleRelativePath = getMainModulePath(resolve(appFullPath, entryModule), tsConfigName);
        if (appModuleRelativePath) {
            const appModuleFolderPath = dirname(resolve(appFullPath, appModuleRelativePath));
            // include the lazy loader inside app module
            ngCompilerTransformers.push(nsReplaceLazyLoader);
            // include the new lazy loader path in the allowed ones
            additionalLazyModuleResources.push(appModuleFolderPath);
        }
    }

    const ngCompilerPlugin = new AngularCompilerPlugin({
        hostReplacementPaths: nsWebpack.getResolver([platform, "tns"]),
        platformTransformers: ngCompilerTransformers.map(t => t(() => ngCompilerPlugin, resolve(appFullPath, entryModule), projectRoot)),
        mainPath: join(appFullPath, entryModule),
        tsConfigPath: join(__dirname, tsConfigName),
        skipCodeGeneration: !aot,
        sourceMap: !!isAnySourceMapEnabled,
        additionalLazyModuleResources: additionalLazyModuleResources
    });

    let sourceMapFilename = nsWebpack.getSourceMapFilename(hiddenSourceMap, __dirname, dist);

    const itemsToClean = [`${dist}/**/*`];
    if (platform === "android") {
        itemsToClean.push(`${join(projectRoot, "platforms", "android", "app", "src", "main", "assets", "snapshots")}`);
        itemsToClean.push(`${join(projectRoot, "platforms", "android", "app", "build", "configurations", "nativescript-android-snapshot")}`);
    }

    nsWebpack.processAppComponents(appComponents, platform);
    const config = {
        mode: production ? "production" : "development",
        context: appFullPath,
        externals: {
            ...externals,
            'nativescript-sqlite-commercial': 'nativescript-sqlite-commercial',
            'nativescript-sqlite-encrypted': 'nativescript-sqlite-encrypted'
        },
        watchOptions: {
            ignored: [
                appResourcesFullPath,
                // Don't watch hidden files
                "**/.*",
            ]
        },
        target: nativescriptTarget,
        entry: entries,
        output: {
            pathinfo: false,
            path: dist,
            sourceMapFilename,
            libraryTarget: "commonjs2",
            filename: "[name].js",
            globalObject: "global",
            hashSalt
        },
        resolve: {
            extensions: [".ts", ".js", ".scss", ".css"],
            // Resolve {N} system modules from tns-core-modules
            modules: [
                resolve(__dirname, "node_modules/tns-core-modules"),
                resolve(__dirname, "node_modules"),
                "node_modules/tns-core-modules",
                "node_modules",
            ],
            alias: {
                '~': appFullPath
            },
            symlinks: true
        },
        resolveLoader: {
            symlinks: false
        },
        node: {
            // Disable node shims that conflict with NativeScript
            "http": false,
            "timers": false,
            "setImmediate": false,
            "fs": "empty",
            "__dirname": false,
        },
        devtool: hiddenSourceMap ? "hidden-source-map" : (sourceMap ? "inline-source-map" : "none"),
        optimization: {
            runtimeChunk: "single",
            splitChunks: {
                cacheGroups: {
                    vendor: {
                        name: "vendor",
                        chunks: "all",
                        test: (module, chunks) => {
                            const moduleName = module.nameForCondition ? module.nameForCondition() : '';
                            return /[\/]node_modules[\/]/.test(moduleName) ||
                                appComponents.some(comp => comp === moduleName);
                        },
                        enforce: true,
                    },
                }
            },
            minimize: !!uglify,
            minimizer: [
                new TerserPlugin({
                    parallel: true,
                    cache: true,
                    sourceMap: isAnySourceMapEnabled,
                    terserOptions: {
                        output: {
                            comments: false,
                            semicolons: !isAnySourceMapEnabled
                        },
                        compress: {
                            // The Android SBG has problems parsing the output
                            // when these options are enabled
                            'collapse_vars': platform !== "android",
                            sequences: platform !== "android",
                        }
                    }
                })
            ],
        },
        module: {
            rules: [
                {
                    include: join(appFullPath, entryPath),
                    use: [
                        // Require all Android app components
                        platform === "android" && {
                            loader: "nativescript-dev-webpack/android-app-components-loader",
                            options: { modules: appComponents }
                        },

                        {
                            loader: "nativescript-dev-webpack/bundle-config-loader",
                            options: {
                                angular: true,
                                loadCss: !snapshot, // load the application css if in debug mode
                                unitTesting,
                                appFullPath,
                                projectRoot,
                                ignoredFiles: nsWebpack.getUserDefinedEntries(entries, platform)
                            }
                        },
                    ].filter(loader => !!loader)
                },

                { test: /\.html$|\.xml$/, use: "raw-loader" },

                // tns-core-modules reads the app.css and its imports using css-loader
                {
                    test: /[\/|\]app\.css$/,
                    use: [
                        "nativescript-dev-webpack/style-hot-loader",
                        { loader: "css-loader", options: { url: false } }
                    ]
                },
                {
                    test: /[\/|\]app\.scss$/,
                    use: [
                        "nativescript-dev-webpack/style-hot-loader",
                        { loader: "css-loader", options: { url: false } },
                        "sass-loader"
                    ]
                },

                // Angular components reference css files and their imports using raw-loader
                { test: /\.css$/, exclude: /[\/|\]app\.css$/, use: "raw-loader" },
                { test: /\.scss$/, exclude: /[\/|\]app\.scss$/, use: ["raw-loader", "resolve-url-loader", "sass-loader"] },

                {
                    test: /(?:\.ngfactory\.js|\.ngstyle\.js|\.ts)$/,
                    use: [
                        "nativescript-dev-webpack/moduleid-compat-loader",
                        "nativescript-dev-webpack/lazy-ngmodule-hot-loader",
                        "@ngtools/webpack",
                    ]
                },

                // Mark files inside `@angular/core` as using SystemJS style dynamic imports.
                // Removing this will cause deprecation warnings to appear.
                {
                    test: /[\/\]@angular[\/\]core[\/\].+\.js$/,
                    parser: { system: true },
                },
            ],
        },
        plugins: [
            // Define useful constants like TNS_WEBPACK
            new webpack.DefinePlugin({
                "global.TNS_WEBPACK": "true",
                "process": "global.process",
            }),
            // Remove all files from the out dir.
            new CleanWebpackPlugin(itemsToClean, { verbose: !!verbose }),
            // Copy assets to out dir. Add your own globs as needed.
            new CopyWebpackPlugin([
                { from: { glob: "fonts/**" } },
                { from: { glob: "**/*.jpg" } },
                { from: { glob: "**/*.png" } },
                { from: { glob: "**/*.sqlite" } }
            ], { ignore: [`${relative(appPath, appResourcesFullPath)}/**`] }),
            new nsWebpack.GenerateNativeScriptEntryPointsPlugin("bundle"),
            // For instructions on how to set up workers with webpack
            // check out https://github.com/nativescript/worker-loader
            new NativeScriptWorkerPlugin(),
            ngCompilerPlugin,
            // Does IPC communication with the {N} CLI to notify events when running in watch mode.
            new nsWebpack.WatchStateLoggerPlugin(),
        ],
    };

    if (report) {
        // Generate report files for bundles content
        config.plugins.push(new BundleAnalyzerPlugin({
            analyzerMode: "static",
            openAnalyzer: false,
            generateStatsFile: true,
            reportFilename: resolve(projectRoot, "report", `report.html`),
            statsFilename: resolve(projectRoot, "report", `stats.json`),
        }));
    }

    if (snapshot) {
        config.plugins.push(new nsWebpack.NativeScriptSnapshotPlugin({
            chunk: "vendor",
            angular: true,
            requireModules: [
                "reflect-metadata",
                "@angular/platform-browser",
                "@angular/core",
                "@angular/common",
                "@angular/router",
                "nativescript-angular/platform-static",
                "nativescript-angular/router",
            ],
            projectRoot,
            webpackConfig: config,
        }));
    }

    if (hmr) {
        config.plugins.push(new webpack.HotModuleReplacementPlugin());
    }

    return config;
};

你的需求语句是动态的，

const MyWorker = require(nativescript-worker-loader!${workerPath});

将其设为静态解决了问题，

const MyWorker = require('nativescript-worker-loader!../sqlite/db.worker.js');

我确定有一个选项可以使 require 语句保持动态，但您需要一个额外的步骤，比如注册模块。我将不得不检查文档/代码，尽可能更新。这应该能让你暂时坚持下去。

升级到 NativeScript 6 后无法解析 db.worker.js 文件的路径

Path of db.worker.js file cannot be resolved after upgrade to NativeScript 6

upgrade

path

worker

nativescript

angular