feat: Always in-memory update package.json (#15732)

Update package.json contents in memory
when checking for bundle build as platform
version might have changed for instance.

Fixes #15727

flow-server/src/main/java/com/vaadin/flow/server/frontend/NodeUpdater.java

@@ -303,11 +303,11 @@ private static <T extends JsonValue> T computeIfAbsent(
         return result;
     }
 
-    Map<String, String> getDefaultDependencies() {
+    static Map<String, String> getDefaultDependencies() {
         return readDependencies("default", "dependencies");
     }
 
-    private Map<String, String> readDependencies(String id,
+    private static Map<String, String> readDependencies(String id,
             String packageJsonKey) {
         try {
             Map<String, String> map = new HashMap<>();
@@ -319,16 +319,16 @@ private Map<String, String> readDependencies(String id,
 
             return map;
         } catch (IOException e) {
-            log().error(
+            LoggerFactory.getLogger(NodeUpdater.class).error(
                     "Unable to read " + packageJsonKey + " from '" + id + "'",
                     e);
             return new HashMap<>();
         }
 
     }
 
-    private JsonObject readPackageJson(String id) throws IOException {
-        try (InputStream packageJson = getClass()
+    private static JsonObject readPackageJson(String id) throws IOException {
+        try (InputStream packageJson = NodeUpdater.class
                 .getResourceAsStream("dependencies/" + id + "/package.json")) {
             JsonObject content = Json.parse(
                     IOUtils.toString(packageJson, StandardCharsets.UTF_8));

flow-server/src/main/java/com/vaadin/flow/server/frontend/TaskRunDevBundleBuild.java

@@ -239,7 +239,8 @@ private static boolean hashAndBundleModulesEqual(JsonObject statsJson,
         String bundlePackageJsonHash = getStatsHash(statsJson);
 
         if (packageJsonHash == null || packageJsonHash.isEmpty()) {
-            getLogger().warn("No hash found for 'package.json'.");
+            getLogger().error(
+                    "No hash found for 'package.json' even though one should always be generated!");
             return false;
         }
 
@@ -309,6 +310,20 @@ private static boolean versionAccepted(String expected, String actual) {
         return expectedVersion.isEqualTo(actualVersion);
     }
 
+    /**
+     * Get the package.json file from disk if available else generate in memory.
+     * <p>
+     * For the loaded file update versions as per in memory to get correct
+     * application versions.
+     *
+     * @param options
+     *            the task options
+     * @param frontendDependencies
+     *            frontend dependency scanner
+     * @param finder
+     *            classfinder
+     * @return package.json content as JsonObject
+     */
     private static JsonObject getPackageJson(Options options,
             FrontendDependenciesScanner frontendDependencies,
             ClassFinder finder) {
@@ -319,65 +334,47 @@ private static JsonObject getPackageJson(Options options,
                 final JsonObject packageJson = Json
                         .parse(FileUtils.readFileToString(packageJsonFile,
                                 StandardCharsets.UTF_8));
-                if (!packageJson.hasKey(NodeUpdater.VAADIN_DEP_KEY)
-                        || !packageJson.getObject(NodeUpdater.VAADIN_DEP_KEY)
-                                .hasKey(NodeUpdater.HASH_KEY)) {
-                    updatePackageJsonWithDefaultDependencies(options,
-                            frontendDependencies, finder, packageJson);
-                }
-                return packageJson;
+                return getDefaultPackageJson(options, frontendDependencies,
+                        finder, packageJson);
             } catch (IOException e) {
                 getLogger().warn("Failed to read package.json", e);
             }
         } else {
             JsonObject packageJson = getDefaultPackageJson(options,
-                    frontendDependencies, finder);
+                    frontendDependencies, finder, null);
             if (packageJson != null) {
                 return packageJson;
             }
         }
         return null;
     }
 
-    private static void updatePackageJsonWithDefaultDependencies(
-            Options options, FrontendDependenciesScanner frontendDependencies,
-            ClassFinder finder, JsonObject packageJson) {
-        // If we have executed flow:clean-frontend we will have an empty
-        // package.json with no hash field.
-        JsonObject defaultPackageJson = getDefaultPackageJson(options,
-                frontendDependencies, finder);
-
-        // Add dependencies as it should be enough to have the expected
-        // dependencies in the package.json
-        final JsonObject defaultDependencies = defaultPackageJson
-                .getObject(NodeUpdater.DEPENDENCIES);
-        for (String key : defaultDependencies.keys()) {
-            packageJson.getObject(NodeUpdater.DEPENDENCIES).put(key,
-                    defaultDependencies.getString(key));
-        }
-
-        // Add hash to package.json so we don't fail just because it is missing
-        final String hash = TaskUpdatePackages
-                .generatePackageJsonHash(packageJson);
-        if (!packageJson.hasKey(NodeUpdater.VAADIN_DEP_KEY)) {
-            packageJson.put(NodeUpdater.VAADIN_DEP_KEY, Json.createObject());
-        }
-        packageJson.getObject(NodeUpdater.VAADIN_DEP_KEY)
-                .put(NodeUpdater.HASH_KEY, hash);
-    }
-
     protected static JsonObject getDefaultPackageJson(Options options,
             FrontendDependenciesScanner frontendDependencies,
-            ClassFinder finder) {
+            ClassFinder finder, JsonObject packageJson) {
         NodeUpdater nodeUpdater = new NodeUpdater(finder, frontendDependencies,
                 options) {
             @Override
             public void execute() {
             }
         };
         try {
-            JsonObject packageJson = nodeUpdater.getPackageJson();
+            if (packageJson == null) {
+                packageJson = nodeUpdater.getPackageJson();
+            }
+            nodeUpdater.addVaadinDefaultsToJson(packageJson);
             nodeUpdater.updateDefaultDependencies(packageJson);
+
+            final Map<String, String> applicationDependencies = frontendDependencies
+                    .getPackages();
+
+            // Add application dependencies
+            for (Map.Entry<String, String> dep : applicationDependencies
+                    .entrySet()) {
+                nodeUpdater.addDependency(packageJson, NodeUpdater.DEPENDENCIES,
+                        dep.getKey(), dep.getValue());
+            }
+
             final String hash = TaskUpdatePackages
                     .generatePackageJsonHash(packageJson);
             packageJson.getObject(NodeUpdater.VAADIN_DEP_KEY)