Initial boiler plate project

node_modules/next/dist/build/webpack/plugins/telemetry-plugin.js

@@ -0,0 +1,173 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", {
+    value: true
+});
+Object.defineProperty(exports, "TelemetryPlugin", {
+    enumerable: true,
+    get: function() {
+        return TelemetryPlugin;
+    }
+});
+const _webpack = require("next/dist/compiled/webpack/webpack");
+// Map of a feature module to the file it belongs in the next package.
+const FEATURE_MODULE_MAP = new Map([
+    [
+        "next/image",
+        "/next/image.js"
+    ],
+    [
+        "next/future/image",
+        "/next/future/image.js"
+    ],
+    [
+        "next/legacy/image",
+        "/next/legacy/image.js"
+    ],
+    [
+        "next/script",
+        "/next/script.js"
+    ],
+    [
+        "next/dynamic",
+        "/next/dynamic.js"
+    ]
+]);
+const FEATURE_MODULE_REGEXP_MAP = new Map([
+    [
+        "@next/font/google",
+        /\/@next\/font\/google\/target.css?.+$/
+    ],
+    [
+        "@next/font/local",
+        /\/@next\/font\/local\/target.css?.+$/
+    ],
+    [
+        "next/font/google",
+        /\/next\/font\/google\/target.css?.+$/
+    ],
+    [
+        "next/font/local",
+        /\/next\/font\/local\/target.css?.+$/
+    ]
+]);
+// List of build features used in webpack configuration
+const BUILD_FEATURES = [
+    "swcLoader",
+    "swcMinify",
+    "swcRelay",
+    "swcStyledComponents",
+    "swcReactRemoveProperties",
+    "swcExperimentalDecorators",
+    "swcRemoveConsole",
+    "swcImportSource",
+    "swcEmotion",
+    "swc/target/x86_64-apple-darwin",
+    "swc/target/x86_64-unknown-linux-gnu",
+    "swc/target/x86_64-pc-windows-msvc",
+    "swc/target/i686-pc-windows-msvc",
+    "swc/target/aarch64-unknown-linux-gnu",
+    "swc/target/armv7-unknown-linux-gnueabihf",
+    "swc/target/aarch64-apple-darwin",
+    "swc/target/aarch64-linux-android",
+    "swc/target/arm-linux-androideabi",
+    "swc/target/x86_64-unknown-freebsd",
+    "swc/target/x86_64-unknown-linux-musl",
+    "swc/target/aarch64-unknown-linux-musl",
+    "swc/target/aarch64-pc-windows-msvc",
+    "turbotrace",
+    "transpilePackages",
+    "skipMiddlewareUrlNormalize",
+    "skipTrailingSlashRedirect",
+    "modularizeImports"
+];
+const eliminatedPackages = new Set();
+/**
+ * Determine if there is a feature of interest in the specified 'module'.
+ */ function findFeatureInModule(module) {
+    if (module.type !== "javascript/auto") {
+        return;
+    }
+    const normalizedIdentifier = module.identifier().replace(/\\/g, "/");
+    for (const [feature, path] of FEATURE_MODULE_MAP){
+        if (normalizedIdentifier.endsWith(path)) {
+            return feature;
+        }
+    }
+    for (const [feature, regexp] of FEATURE_MODULE_REGEXP_MAP){
+        if (regexp.test(normalizedIdentifier)) {
+            return feature;
+        }
+    }
+}
+/**
+ * Find unique origin modules in the specified 'connections', which possibly
+ * contains more than one connection for a module due to different types of
+ * dependency.
+ */ function findUniqueOriginModulesInConnections(connections, originModule) {
+    const originModules = new Set();
+    for (const connection of connections){
+        if (!originModules.has(connection.originModule) && connection.originModule !== originModule) {
+            originModules.add(connection.originModule);
+        }
+    }
+    return originModules;
+}
+class TelemetryPlugin {
+    // Build feature usage is on/off and is known before the build starts
+    constructor(buildFeaturesMap){
+        this.usageTracker = new Map();
+        for (const featureName of BUILD_FEATURES){
+            this.usageTracker.set(featureName, {
+                featureName,
+                invocationCount: buildFeaturesMap.get(featureName) ? 1 : 0
+            });
+        }
+        for (const featureName of FEATURE_MODULE_MAP.keys()){
+            this.usageTracker.set(featureName, {
+                featureName,
+                invocationCount: 0
+            });
+        }
+        for (const featureName of FEATURE_MODULE_REGEXP_MAP.keys()){
+            this.usageTracker.set(featureName, {
+                featureName,
+                invocationCount: 0
+            });
+        }
+    }
+    apply(compiler) {
+        compiler.hooks.make.tapAsync(TelemetryPlugin.name, async (compilation, callback)=>{
+            compilation.hooks.finishModules.tapAsync(TelemetryPlugin.name, async (modules, modulesFinish)=>{
+                for (const module of modules){
+                    const feature = findFeatureInModule(module);
+                    if (!feature) {
+                        continue;
+                    }
+                    const connections = compilation.moduleGraph.getIncomingConnections(module);
+                    const originModules = findUniqueOriginModulesInConnections(connections, module);
+                    this.usageTracker.get(feature).invocationCount = originModules.size;
+                }
+                modulesFinish();
+            });
+            callback();
+        });
+        if (compiler.options.mode === "production" && !compiler.watchMode) {
+            compiler.hooks.compilation.tap(TelemetryPlugin.name, (compilation)=>{
+                const moduleHooks = _webpack.NormalModule.getCompilationHooks(compilation);
+                moduleHooks.loader.tap(TelemetryPlugin.name, (loaderContext)=>{
+                    loaderContext.eliminatedPackages = eliminatedPackages;
+                });
+            });
+        }
+    }
+    usages() {
+        return [
+            ...this.usageTracker.values()
+        ];
+    }
+    packagesUsedInServerSideProps() {
+        return Array.from(eliminatedPackages);
+    }
+}
+
+//# sourceMappingURL=telemetry-plugin.js.map