chore(firebase_core): create a swift package of shared iOS source code for all plugins (#13540)

Author: russellwheatley

Package.swift

@@ -0,0 +1,83 @@
+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+// Copyright 2024, the Chromium project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import Foundation
+import PackageDescription
+
+enum ConfigurationError: Error {
+  case fileNotFound(String)
+  case parsingError(String)
+  case invalidFormat(String)
+}
+
+func loadFirebaseSDKVersion() throws -> String {
+  let firebaseCoreScriptPath = NSString.path(withComponents: [
+    "packages",
+    "firebase_core",
+    "firebase_core",
+    "ios",
+    "firebase_sdk_version.rb",
+  ])
+
+  do {
+    let content = try String(contentsOfFile: firebaseCoreScriptPath, encoding: .utf8)
+    let pattern = #"def firebase_sdk_version!\(\)\n\s+'([^']+)'\nend"#
+    if let regex = try? NSRegularExpression(pattern: pattern, options: []),
+       let match = regex.firstMatch(
+         in: content,
+         range: NSRange(content.startIndex..., in: content)
+       ) {
+      if let versionRange = Range(match.range(at: 1), in: content) {
+        return String(content[versionRange])
+      } else {
+        throw ConfigurationError.invalidFormat("Invalid format in firebase_sdk_version.rb")
+      }
+    } else {
+      throw ConfigurationError.parsingError("No match found in firebase_sdk_version.rb")
+    }
+  } catch {
+    throw ConfigurationError
+      .fileNotFound("Error loading or parsing firebase_sdk_version.rb: \(error)")
+  }
+}
+
+let firebase_sdk_version_string: String
+
+do {
+  firebase_sdk_version_string = try loadFirebaseSDKVersion()
+} catch {
+  fatalError("Failed to load configuration: \(error)")
+}
+
+guard let firebase_sdk_version = Version(firebase_sdk_version_string) else {
+  fatalError("Invalid Firebase SDK version: \(firebase_sdk_version_string)")
+}
+
+// Shared Swift package manager code for firebase core
+let package = Package(
+  name: "remote_firebase_core",
+  platforms: [
+    .iOS("13.0"),
+    .macOS("10.15"),
+  ],
+  products: [
+    .library(name: "firebase-core-shared", targets: ["firebase_core_shared"]),
+  ],
+  dependencies: [
+    .package(url: "https://github.com/firebase/firebase-ios-sdk", exact: firebase_sdk_version),
+  ],
+  targets: [
+    .target(
+      name: "firebase_core_shared",
+      dependencies: [
+        .product(name: "FirebaseInstallations", package: "firebase-ios-sdk"),
+      ],
+      path: "Sources/firebase_core_shared",
+      publicHeadersPath: "include"
+    ),
+  ]
+)

Sources/firebase_core_shared/FLTFirebasePlugin.m

@@ -0,0 +1 @@
+../../packages/firebase_core/firebase_core/ios/firebase_core/Sources/firebase_core/FLTFirebasePlugin.m

Sources/firebase_core_shared/FLTFirebasePluginRegistry.m

@@ -0,0 +1 @@
+../../packages/firebase_core/firebase_core/ios/firebase_core/Sources/firebase_core/FLTFirebasePluginRegistry.m

Sources/firebase_core_shared/include/FLTFirebasePlugin.h

@@ -0,0 +1 @@
+../../../packages/firebase_core/firebase_core/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebasePlugin.h

Sources/firebase_core_shared/include/FLTFirebasePluginRegistry.h

@@ -0,0 +1 @@
+../../../packages/firebase_core/firebase_core/ios/firebase_core/Sources/firebase_core/include/firebase_core/FLTFirebasePluginRegistry.h

melos.yaml

@@ -21,6 +21,8 @@ command:
         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
+      post: |
+        dart run scripts/generate_tag_spm_firebase_core.dart
 
   bootstrap:
     # It seems so that running "pub get" in parallel has some issues (like

scripts/generate_tag_spm_firebase_core.dart

@@ -0,0 +1,45 @@
+// Copyright 2024 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+// ignore_for_file: avoid_print
+
+import 'dart:io';
+import 'package:yaml/yaml.dart';
+
+void main(List<String> args) {
+  // Define the path to the pubspec.yaml file
+  const pubspecPath = 'packages/firebase_core/firebase_core/pubspec.yaml';
+
+  // Read the pubspec.yaml file
+  final pubspecFile = File(pubspecPath);
+  if (!pubspecFile.existsSync()) {
+    print('Error: pubspec.yaml file not found at $pubspecPath');
+    return;
+  }
+
+  // Parse the YAML content
+  final pubspecContent = pubspecFile.readAsStringSync();
+  final pubspecYaml = loadYaml(pubspecContent);
+
+  // Extract the version
+  final version = pubspecYaml['version'];
+  if (version == null) {
+    print('Error: Version not found in pubspec.yaml');
+    return;
+  }
+
+  const packageIdentifier = 'firebase-core-swift';
+
+  // Generate the tag
+  final tag = '$version-$packageIdentifier';
+  print('Generated tag for firebase core swift: $tag');
+
+  // Run the git tag command
+  final result = Process.runSync('git', ['tag', tag]);
+
+  if (result.exitCode == 0) {
+    print('Git tag created successfully for firebase core swift: $tag');
+  } else {
+    print('Error creating git tag: ${result.stderr}');
+  }
+}