fix(core, ios): ensure iOS SDK version can be found from Package.swift (#13804)

Author: russellwheatley

.github/workflows/all_plugins.yaml

@@ -124,7 +124,7 @@ jobs:
             "flutter build web"
   swift-integration:
     runs-on: macos-latest
-    timeout-minutes: 10
+    timeout-minutes: 30
     steps:
       - uses: actions/checkout@d632683dd7b4114ad314bca15554477dd762a938
       - uses: subosito/flutter-action@2783a3f08e1baf891508463f8c6653c258246225
@@ -135,10 +135,10 @@ jobs:
         with:
           melos-version: '5.3.0'
       - name: 'Swift Integration Setup'
-        run: flutter config --enable-swift-package-manager 
+        run: flutter config --enable-swift-package-manager
       - name: 'Build Apps with Swift Package Manager'
         run: ./.github/workflows/scripts/swift-integration.sh
-            
+
   test:
     runs-on: ubuntu-latest
     timeout-minutes: 30

packages/firebase_core/firebase_core/ios/firebase_core/Package.swift

@@ -14,11 +14,16 @@ enum ConfigurationError: Error {
   case invalidFormat(String)
 }
 
-let iosRootDirectory = String(URL(string: #file)!.deletingLastPathComponent().absoluteString
+let firebaseCoreDirectory = String(URL(string: #file)!.deletingLastPathComponent().absoluteString
   .dropLast())
 
 func loadPubspecVersion() throws -> String {
-  let pubspecPath = NSString.path(withComponents: [iosRootDirectory, "..", "..", "pubspec.yaml"])
+  let pubspecPath = NSString.path(withComponents: [
+    firebaseCoreDirectory,
+    "..",
+    "..",
+    "pubspec.yaml",
+  ])
   do {
     let yamlString = try String(contentsOfFile: pubspecPath, encoding: .utf8)
     if let versionLine = yamlString.split(separator: "\n")
@@ -35,12 +40,8 @@ func loadPubspecVersion() throws -> String {
 
 func loadFirebaseSDKVersion() throws -> String {
   let firebaseCoreScriptPath = NSString.path(withComponents: [
-    iosRootDirectory,
-    "..",
-    "..",
+    firebaseCoreDirectory,
     "..",
-    "firebase_core",
-    "ios",
     "firebase_sdk_version.rb",
   ])
   do {