class extend & env.snapshot => Exception in thread "main" java.io.IOException: File already exists. This may lead to undesired behavior.

[des-esseintes]

Hello!

Issue Checklist

• [x] You are submitting: a bug report
• [x] You verified that this is a real problem by searching the [NativeScript Forum] and the other [issues] in this repo.
• [x] You checked our [demo apps] and the [documentation] for sample usage.

Tell us about the problem

I'm having a service and a receiver described in AndroidManifest.xml, and a couple of js files extending the classes (all taken from nativescript background services example working w/ android's alarmManager). everything seems to be fine when using no webpack or just plain webpack, but goes out of control w/ snapshot generation:

Project successfully prepared (Android)
Executing after-prepare hook from /home/k/dev/android/smokealarm/hooks/after-prepare/nativescript-dev-webpack.js
mv: './snapshot.blob' и 'snapshot.blob' - один и тот же файл
mv: './snapshot.blob' и 'snapshot.blob' - один и тот же файл
mv: './snapshot.blob' и 'snapshot.blob' - один и тот же файл
Building project...
Gradle build...
	 + applying user-defined configuration from /home/k/dev/android/smokealarm/app/App_Resources/Android/app.gradle
Configuration 'compile' in project ':app' is deprecated. Use 'implementation' instead.
Configuration 'debugCompile' in project ':app' is deprecated. Use 'debugImplementation' instead.
	 + adding nativescript runtime package dependency: nativescript-optimized
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/nativescript-android-utils/platforms/android/androidutils.aar
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/nativescript-local-notifications/platforms/android/localnotlib-release.aar
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/tns-core-modules-widgets/platforms/android/widgets-release.aar
Gradle build...
	 + applying user-defined configuration from /home/k/dev/android/smokealarm/app/App_Resources/Android/app.gradle
Configuration 'compile' in project ':app' is deprecated. Use 'implementation' instead.
Configuration 'debugCompile' in project ':app' is deprecated. Use 'debugImplementation' instead.
	 + adding nativescript runtime package dependency: nativescript-optimized
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/nativescript-android-utils/platforms/android/androidutils.aar
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/nativescript-local-notifications/platforms/android/localnotlib-release.aar
	 + adding aar plugin dependency: /home/k/dev/android/smokealarm/node_modules/tns-core-modules-widgets/platforms/android/widgets-release.aar
Warning: there already is an extend called com.tns.broadcastreceivers.NotificationEventReceiver.
Warning: The static binding generator will generate extend from:bundle.js implementation
Warning: there already is an extend called com.tns.notifications.NotificationIntentService.
Warning: The static binding generator will generate extend from:bundle.js implementation
Warning: there already is an extend called com.tns.broadcastreceivers.NotificationServiceStarterReceiver.
Warning: The static binding generator will generate extend from:bundle.js implementation
Exception in thread "main" java.io.IOException: File already exists. This may lead to undesired behavior.
Please change the name of one of the extended classes.
File:/home/k/dev/android/smokealarm/platforms/android/app/src/main/java/com/tns/broadcastreceivers/NotificationEventReceiver.java Class: com.tns.broadcastreceivers.NotificationEventReceiver
	at org.nativescript.staticbindinggenerator.Generator.writeBindings(Generator.java:65)
	at org.nativescript.staticbindinggenerator.Main.main(Main.java:48)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:runSbg'.
> Process 'command '/opt/icedtea-bin-3.5.1/bin/java'' finished with non-zero exit value 1

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

* Get more help at https://help.gradle.org

BUILD FAILED in 22s
Command ./gradlew failed with exit code 1

Local environment

• [x] Platform Linux
• [x] Node version 6.9.4
• [x] NativeScript CLI version 4.0.2

Project data

• [x] Platform you are building the app for Android
• [x] Node dependencies:

{
  "description": "Smoke Alarm App",
  "license": "SEE LICENSE IN <your-license-filename>",
  "readme": "NativeScript Application",
  "repository": "<fill-your-repository-here>",
  "nativescript": {
    "id": "uk.co.digitalquill.alarm",
    "tns-android": {
      "version": "4.0.1"
    }
  },
  "dependencies": {
    "nativescript-android-utils": "^1.0.2",
    "nativescript-carousel": "^3.1.1",
    "nativescript-drop-down": "^4.0.0",
    "nativescript-local-notifications": "^2.0.3",
    "nativescript-sqlite": "^2.2.0",
    "nativescript-theme-core": "^1.0.4",
    "sprintf-js": "^1.1.1",
    "tns-core-modules": "^4.1.0"
  },
  "devDependencies": {
    "babel-traverse": "6.26.0",
    "babel-types": "6.26.0",
    "babylon": "6.18.0",
    "clean-webpack-plugin": "~0.1.19",
    "copy-webpack-plugin": "~4.5.1",
    "css-loader": "~0.28.11",
    "extract-text-webpack-plugin": "~3.0.2",
    "lazy": "1.0.11",
    "nativescript-dev-webpack": "^0.13.0",
    "nativescript-worker-loader": "~0.9.0",
    "raw-loader": "~0.5.1",
    "uglifyjs-webpack-plugin": "~1.2.5",
    "webpack": "~4.6.0",
    "webpack-bundle-analyzer": "~2.13.0",
    "webpack-cli": "~2.1.3",
    "webpack-sources": "~1.1.0"
  }
}

• [x] Webpack configuration:

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

const webpack = require("webpack");
const nsWebpack = require("nativescript-dev-webpack");
const nativescriptTarget = require("nativescript-dev-webpack/nativescript-target");
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 UglifyJsPlugin = require("uglifyjs-webpack-plugin");

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",
		resolve(__dirname, "app/notifications/NotificationEventReceiver"),
		resolve(__dirname, "app/notifications/NotificationIntentService"),
		resolve(__dirname, "app/notifications/NotificationServiceStarterReceiver"),
    ];

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

    const platforms = ["ios", "android"];
    const projectRoot = __dirname;

    // Default destination inside platforms/<platform>/...
    const dist = resolve(projectRoot, nsWebpack.getAppPath(platform, projectRoot));
    const appResourcesPlatformDir = platform === "android" ? "Android" : "iOS";

    const {
        // The 'appPath' and 'appResourcesPath' values are fetched from
        // the nsconfig.json configuration file
        // when bundling with `tns run android|ios --bundle`.
        appPath = "app",
        appResourcesPath = "app/App_Resources",

        // You can provide the following flags when running 'tns run android|ios'
        snapshot, // --env.snapshot
        uglify, // --env.uglify
        report, // --env.report
    } = env;

    const appFullPath = resolve(projectRoot, appPath);
    const appResourcesFullPath = resolve(projectRoot, appResourcesPath);

    const entryModule = nsWebpack.getEntryModule(appFullPath);
    const entryPath = `.${sep}${entryModule}.js`;

    const config = {
        mode: uglify ? "production" : "development",
        context: appFullPath,
        watchOptions: {
            ignored: [
                appResourcesFullPath,
                // Don't watch hidden files
                "**/.*",
            ]
        },
        target: nativescriptTarget,
        entry: {
            bundle: entryPath,
        },
        output: {
            pathinfo: false,
            path: dist,
            libraryTarget: "commonjs2",
            filename: "[name].js",
            globalObject: "global",
        },
        resolve: {
            extensions: [".js", ".scss", ".css"],
            // Resolve {N} system modules from tns-core-modules
            modules: [
                "node_modules/tns-core-modules",
                "node_modules",
            ],
            alias: {
                '~': appFullPath
            },
            // don't resolve symlinks to symlinked modules
            symlinks: false
        },
        resolveLoader: {
            // don't resolve symlinks to symlinked loaders
            symlinks: false
        },
        node: {
            // Disable node shims that conflict with NativeScript
            "http": false,
            "timers": false,
            "setImmediate": false,
            "fs": "empty",
            "__dirname": false,
        },
        devtool: "none",
        optimization:  {
            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 UglifyJsPlugin({
                    uglifyOptions: {
                        parallel: true,
                        cache: true,
                        output: {
                            comments: false,
                        },
                        compress: {
                            // The Android SBG has problems parsing the output
                            // when these options are enabled
                            'collapse_vars': platform !== "android",
                            sequences: platform !== "android",
                        }
                    }
                })
            ],
        },
        module: {
            rules: [
                {
                    test: new RegExp(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: {
                                loadCss: !snapshot, // load the application css if in debug mode
                            }
                        },
                    ].filter(loader => !!loader)
                },

                { test: /\.(html|xml)$/, use: "nativescript-dev-webpack/xml-namespace-loader"},

                {
                    test: /\.css$/,
                    use: { loader: "css-loader", options: { minimize: false, url: false } }
                },

                {
                    test: /\.scss$/,
                    use: [
                        { loader: "css-loader", options: { minimize: false, url: false } },
                        "sass-loader"
                    ]
                }
            ]
        },
        plugins: [
            // Define useful constants like TNS_WEBPACK
            new webpack.DefinePlugin({
                "global.TNS_WEBPACK": "true",
            }),
            // Remove all files from the out dir.
            new CleanWebpackPlugin([ `${dist}/**/*` ]),
           // Copy native app resources to out dir.
            new CopyWebpackPlugin([
              {
                from: `${appResourcesFullPath}/${appResourcesPlatformDir}`,
                to: `${dist}/App_Resources/${appResourcesPlatformDir}`,
                context: projectRoot
              },
            ]),
            // Copy assets to out dir. Add your own globs as needed.
            new CopyWebpackPlugin([
                { from: "fonts/**" },
                { from: "**/*.jpg" },
                { from: "**/*.png" },
				{ from: "alarm.db" },
				{ from: "sound/*mp3" },
            ], { ignore: [`${relative(appPath, appResourcesFullPath)}/**`] }),
            // Generate a bundle starter script and activate it in package.json
            new nsWebpack.GenerateBundleStarterPlugin([
                "./vendor",
                "./bundle",
            ]),
            // For instructions on how to set up workers with webpack
            // check out https://github.com/nativescript/worker-loader
            new NativeScriptWorkerPlugin(),
            new nsWebpack.PlatformFSPlugin({
                platform,
                platforms,
            }),
            // 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",
            requireModules: [
                "tns-core-modules/bundle-entry-points",
            ],
            projectRoot,
            webpackConfig: config,
        }));
    }

    return config;
};

[yahyaKacem]

Hi, I'm having the same error when building with the snapshot flag on, getting this error:

Error executing Static Binding Generator: File already exists. This may lead to undesired behavior. Please change the name of one of the extended classes. File:/path/to/project/platforms/android/app/src/main/java/com/tns/NotificationEventReceiver.java Class: com.tns.NotificationEventReceiver Detailed log here: /path/to/project/platforms/android/build-tools/runSbg.log

the content of the log file /path/to/project/platforms/android/build-tools/runSbg.log:

Warning: there already is an extend called com.tns.NotificationEventReceiver.
Warning: The static binding generator will generate extend from:1.js implementation
Warning: there already is an extend called com.tns.NotificationIntentService.
Warning: The static binding generator will generate extend from:1.js implementation
java.io.IOException: File already exists. This may lead to undesired behavior.
Please change the name of one of the extended classes.
File:/path/to/project/platforms/android/app/src/main/java/com/tns/NotificationEventReceiver.java Class: com.tns.NotificationEventReceiver
	at org.nativescript.staticbindinggenerator.Generator.writeBindings(Generator.java:112)
	at org.nativescript.staticbindinggenerator.Main.main(Main.java:55)

I run this command: tns build android --release --env.uglify --env.aot --env.snapshot --key-store-path 'keystore-file-path.ext' --key-store-password 'password' --key-store-alias 'Alias' --key-store-alias-password 'aliasPassword' --copy-to './' --bundle the build pass without the snapshot flag without errors.

Platform Mac os Catalina 10.15.2 Node version: 12.8.1 NativeScript CLI version 6.3.0

[kanclalg]

I'm having the same issue. Have any of you found a solution?

[rosen-vladimirov]

Hey guys, Can you please send a package.json and ideally a sample application reproducing the issue. It seems some of the plugins or your local code conflicts with extending the same class multiple times which leads to the error. We cannot determine the cause without more information on this case as the problem seems related to the application itself or the usage of specific plugins.