chore: update melos preCommit hook for data connect version (#13402)

melos.yaml

@@ -18,7 +18,9 @@ command:
     hooks:
       preCommit: |
         dart run scripts/generate_vertexai_version.dart && \
-        git add packages/firebase_vertexai/firebase_vertexai/lib/src/vertex_version.dart
+        dart run scripts/generate_dataconnect_version.dart && \
+        git add packages/firebase_vertexai/firebase_vertexai/lib/src/vertex_version.dart && \
+        git add packages/firebase_data_connect/firebase_data_connect/lib/src/dataconnect_version.dart
 
   bootstrap:
     # It seems so that running "pub get" in parallel has some issues (like

scripts/generate_dataconnect_version.dart

@@ -0,0 +1,65 @@
+// Copyright 2024 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import 'dart:io' show Directory, File;
+import 'package:path/path.dart' show joinAll;
+import 'package:yaml/yaml.dart' show YamlMap, loadYaml;
+
+Future<void> main() async {
+  final outputPath = joinAll(
+    [
+      Directory.current.path,
+      'packages',
+      'firebase_data_connect',
+      'firebase_data_connect',
+      'lib',
+      'src',
+      'dataconnect_version.dart',
+    ],
+  );
+
+  final pubspecPath = joinAll(
+    [
+      Directory.current.path,
+      'packages',
+      'firebase_data_connect',
+      'firebase_data_connect',
+      'pubspec.yaml'
+    ],
+  );
+  final yamlMap = loadYaml(File(pubspecPath).readAsStringSync()) as YamlMap;
+  final currentVersion = yamlMap['version'] as String;
+  final fileContents = File(outputPath).readAsStringSync();
+
+  final lines = fileContents.split('\n');
+
+  const versionLinePrefix = 'const packageVersion = ';
+  bool versionLineFound = false;
+  for (int i = 0; i < lines.length; i++) {
+    if (lines[i].startsWith(versionLinePrefix)) {
+      lines[i] = "$versionLinePrefix'$currentVersion';";
+      versionLineFound = true;
+      break;
+    }
+  }
+
+  if (!versionLineFound) {
+    lines.add("$versionLinePrefix'$currentVersion';");
+  }
+
+  // Join the lines back into a single string
+  final newFileContents = lines.join('\n');
+
+  await File(outputPath).writeAsString(newFileContents);
+}