feat(core): support for using SPM (Swift Package Manager)

.github/workflows/all_plugins.yaml

@@ -122,7 +122,23 @@ jobs:
         run: |
           melos exec -c 1 --scope="*example*" --dir-exists="web" -- \
             "flutter build web"
-
+  swift-integration:
+    runs-on: macos-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11
+      - uses: subosito/flutter-action@2783a3f08e1baf891508463f8c6653c258246225
+        with:
+        # TODO - enabling swift is on `master` channel at the moment. Update when it's on `stable`
+          channel: 'master'
+      - uses: bluefireteam/melos-action@5a8367ec4b9942d712528c398ff3f996e03bc230
+        with:
+          melos-version: '5.3.0'
+      - name: 'Swift Integration Setup'
+        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

.github/workflows/ios.yaml

@@ -74,6 +74,23 @@ jobs:
       - name: 'Install Tools'
         run: |
           sudo npm i -g firebase-tools
+      - name: 'Free up space'
+        run: |
+          sudo rm -rf \
+            /usr/local/share/.cache \
+            /Users/runner/Library/Caches \
+            /Users/runner/Library/Developer/Xcode/DerivedData \
+            /Users/runner/Library/Developer/CoreSimulator/Caches \
+            /opt/microsoft/msedge \
+            /opt/microsoft/powershell \
+            /opt/pipx \
+            /usr/lib/mono \
+            /usr/local/julia* \
+            /usr/local/lib/android \
+            /usr/local/share/chromium \
+            /usr/local/share/powershell \
+            /usr/share/dotnet
+          df -h /
       - name: 'Build Application'
         working-directory: ${{ matrix.working_directory }}
         run: |

.github/workflows/scripts/swift-integration.sh

@@ -0,0 +1,55 @@
+#!/bin/bash
+
+set -e
+
+# Just Core example has pure Swift capability at the moment
+
+
+# firebase_core iOS example
+
+# Setup for SPM integration
+cd packages/firebase_core/firebase_core/example/ios
+rm Podfile
+pod deintegrate
+
+# Run the flutter build command and capture the output and exit status
+flutter_output=$(flutter build ios --no-codesign)
+flutter_exit_code=$?
+
+# Check if the flutter build command was successful
+if [[ $flutter_exit_code -ne 0 ]]; then
+  echo "Flutter build failed with exit code $flutter_exit_code."
+  exit 1
+fi
+
+# Check the output for the specific string
+if [[ "$flutter_output" =~ "Running pod install" ]]; then
+  exit 1
+else
+  echo "Successfully built iOS project using Swift Package Manager."
+fi
+
+# firebase_core macOS example
+
+# Setup for SPM integration
+cd ../macos
+rm Podfile
+pod deintegrate
+
+# Run the flutter build command and capture the output and exit status
+flutter_output=$(flutter build macos)
+flutter_exit_code=$?
+
+# Check if the flutter build command was successful
+if [[ $flutter_exit_code -ne 0 ]]; then
+  echo "Flutter build failed with exit code $flutter_exit_code."
+  exit 1
+fi
+
+# Check the output for the specific string
+if [[ "$flutter_output" =~ "Running pod install" ]]; then
+  exit 1
+else
+  echo "Successfully built macOS project using Swift Package Manager."
+  exit 0
+fi

.gitignore

@@ -15,6 +15,7 @@ flutter_export_environment.sh
 
 examples/all_plugins/pubspec.yaml
 
+Package.resolved
 Podfile.lock
 Pods/
 .symlinks/

packages/firebase_core/firebase_core/example/ios/Flutter/Debug.xcconfig

@@ -1,2 +1,2 @@
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

packages/firebase_core/firebase_core/example/ios/Flutter/Release.xcconfig

@@ -1,2 +1,2 @@
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

packages/firebase_core/firebase_core/example/ios/Runner.xcodeproj/project.pbxproj

@@ -9,6 +9,7 @@
 /* Begin PBXBuildFile section */
 		1498D2341E8E89220040F4C2 /* GeneratedPluginRegistrant.m in Sources */ = {isa = PBXBuildFile; fileRef = 1498D2331E8E89220040F4C2 /* GeneratedPluginRegistrant.m */; };
 		3B3967161E833CAA004F5970 /* AppFrameworkInfo.plist in Resources */ = {isa = PBXBuildFile; fileRef = 3B3967151E833CAA004F5970 /* AppFrameworkInfo.plist */; };
+		78A318202AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage in Frameworks */ = {isa = PBXBuildFile; productRef = 78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */; };
 		978B8F6F1D3862AE00F588F7 /* AppDelegate.m in Sources */ = {isa = PBXBuildFile; fileRef = 7AFFD8EE1D35381100E5BB4D /* AppDelegate.m */; };
 		97C146F31CF9000F007C117D /* main.m in Sources */ = {isa = PBXBuildFile; fileRef = 97C146F21CF9000F007C117D /* main.m */; };
 		97C146FC1CF9000F007C117D /* Main.storyboard in Resources */ = {isa = PBXBuildFile; fileRef = 97C146FA1CF9000F007C117D /* Main.storyboard */; };
@@ -56,6 +57,7 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
+				78A318202AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage in Frameworks */,
 				CC8B39E3ACF96AAA7558280C /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -149,13 +151,15 @@
 				97C146EC1CF9000F007C117D /* Resources */,
 				9705A1C41CF9048500538489 /* Embed Frameworks */,
 				3B06AD1E1E4923F5004D2608 /* Thin Binary */,
-				FE9FCD1596DCB6AB2B208201 /* [CP] Embed Pods Frameworks */,
 			);
 			buildRules = (
 			);
 			dependencies = (
 			);
 			name = Runner;
+			packageProductDependencies = (
+				78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */,
+			);
 			productName = Runner;
 			productReference = 97C146EE1CF9000F007C117D /* Runner.app */;
 			productType = "com.apple.product-type.application";
@@ -184,6 +188,9 @@
 				Base,
 			);
 			mainGroup = 97C146E51CF9000F007C117D;
+			packageReferences = (
+				781AD8BC2B33823900A9FFBB /* XCLocalSwiftPackageReference "FlutterGeneratedPluginSwiftPackage" */,
+			);
 			productRefGroup = 97C146EF1CF9000F007C117D /* Products */;
 			projectDirPath = "";
 			projectRoot = "";
@@ -261,30 +268,6 @@
 			shellPath = /bin/sh;
 			shellScript = "/bin/sh \"$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh\" build";
 		};
-		FE9FCD1596DCB6AB2B208201 /* [CP] Embed Pods Frameworks */ = {
-			isa = PBXShellScriptBuildPhase;
-			buildActionMask = 2147483647;
-			files = (
-			);
-			inputPaths = (
-				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
-				"${BUILT_PRODUCTS_DIR}/FirebaseCore/FirebaseCore.framework",
-				"${BUILT_PRODUCTS_DIR}/FirebaseCoreInternal/FirebaseCoreInternal.framework",
-				"${BUILT_PRODUCTS_DIR}/GoogleUtilities/GoogleUtilities.framework",
-				"${BUILT_PRODUCTS_DIR}/PromisesObjC/FBLPromises.framework",
-			);
-			name = "[CP] Embed Pods Frameworks";
-			outputPaths = (
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FirebaseCore.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FirebaseCoreInternal.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/GoogleUtilities.framework",
-				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/FBLPromises.framework",
-			);
-			runOnlyForDeploymentPostprocessing = 0;
-			shellPath = /bin/sh;
-			shellScript = "\"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh\"\n";
-			showEnvVarsInLog = 0;
-		};
 /* End PBXShellScriptBuildPhase section */
 
 /* Begin PBXSourcesBuildPhase section */
@@ -580,6 +563,20 @@
 			defaultConfigurationName = Release;
 		};
 /* End XCConfigurationList section */
+
+/* Begin XCLocalSwiftPackageReference section */
+		781AD8BC2B33823900A9FFBB /* XCLocalSwiftPackageReference "FlutterGeneratedPluginSwiftPackage" */ = {
+			isa = XCLocalSwiftPackageReference;
+			relativePath = Flutter/ephemeral/Packages/FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCLocalSwiftPackageReference section */
+
+/* Begin XCSwiftPackageProductDependency section */
+		78A3181F2AECB46A00862997 /* FlutterGeneratedPluginSwiftPackage */ = {
+			isa = XCSwiftPackageProductDependency;
+			productName = FlutterGeneratedPluginSwiftPackage;
+		};
+/* End XCSwiftPackageProductDependency section */
 	};
 	rootObject = 97C146E61CF9000F007C117D /* Project object */;
 }

packages/firebase_core/firebase_core/example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

packages/firebase_core/firebase_core/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme

@@ -5,6 +5,24 @@
    <BuildAction
       parallelizeBuildables = "YES"
       buildImplicitDependencies = "YES">
+      <PreActions>
+         <ExecutionAction
+            ActionType = "Xcode.IDEStandardExecutionActionsCore.ExecutionActionType.ShellScriptAction">
+            <ActionContent
+               title = "Run Prepare Flutter Framework Script"
+               scriptText = "/bin/sh &quot;$FLUTTER_ROOT/packages/flutter_tools/bin/xcode_backend.sh&quot; prepare&#10;">
+               <EnvironmentBuildable>
+                  <BuildableReference
+                     BuildableIdentifier = "primary"
+                     BlueprintIdentifier = "97C146ED1CF9000F007C117D"
+                     BuildableName = "Runner.app"
+                     BlueprintName = "Runner"
+                     ReferencedContainer = "container:Runner.xcodeproj">
+                  </BuildableReference>
+               </EnvironmentBuildable>
+            </ActionContent>
+         </ExecutionAction>
+      </PreActions>
       <BuildActionEntries>
          <BuildActionEntry
             buildForTesting = "YES"

packages/firebase_core/firebase_core/example/macos/Flutter/Flutter-Release.xcconfig

@@ -1,2 +1,2 @@
-#include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

packages/firebase_core/firebase_core/ios/firebase_core.podspec

@@ -24,8 +24,8 @@ Pod::Spec.new do |s|
   s.license          = { :file => '../LICENSE' }
   s.authors          = 'The Chromium Authors'
   s.source           = { :path => '.' }
-  s.source_files     = 'Classes/**/*'
-  s.public_header_files = 'Classes/**/*.h'
+  s.source_files     = 'firebase_core/Sources/firebase_core/**/*.{h,m}'
+  s.public_header_files = 'firebase_core/Sources/firebase_core/include/**/*.h'
 
   s.ios.deployment_target = '13.0'
 
@@ -37,7 +37,7 @@ Pod::Spec.new do |s|
 
   s.static_framework = true
   s.pod_target_xcconfig = {
-    'GCC_PREPROCESSOR_DEFINITIONS' => "LIBRARY_VERSION=\\@\\\"#{library_version}\\\" LIBRARY_NAME=\\@\\\"flutter-fire-core\\\"",
+    'GCC_PREPROCESSOR_DEFINITIONS' => "LIBRARY_VERSION=\\\"#{library_version}\\\" LIBRARY_NAME=\\\"flutter-fire-core\\\"",
     'DEFINES_MODULE' => 'YES'
   }
 end

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

@@ -0,0 +1,110 @@
+// 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)
+}
+
+let iosRootDirectory = String(URL(string: #file)!.deletingLastPathComponent().absoluteString
+  .dropLast())
+
+func loadPubspecVersion() throws -> String {
+  let pubspecPath = NSString.path(withComponents: [iosRootDirectory, "..", "..", "pubspec.yaml"])
+  do {
+    let yamlString = try String(contentsOfFile: pubspecPath, encoding: .utf8)
+    if let versionLine = yamlString.split(separator: "\n")
+      .first(where: { $0.starts(with: "version:") }) {
+      let version = versionLine.split(separator: ":")[1].trimmingCharacters(in: .whitespaces)
+      return version.replacingOccurrences(of: "+", with: "-")
+    } else {
+      throw ConfigurationError.invalidFormat("No version line found in pubspec.yaml")
+    }
+  } catch {
+    throw ConfigurationError.fileNotFound("Error loading or parsing pubspec.yaml: \(error)")
+  }
+}
+
+func loadFirebaseSDKVersion() throws -> String {
+  let firebaseCoreScriptPath = NSString.path(withComponents: [
+    iosRootDirectory,
+    "..",
+    "..",
+    "..",
+    "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 library_version: String
+let firebase_sdk_version_string: String
+
+do {
+  library_version = try loadPubspecVersion()
+  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)")
+}
+
+let package = Package(
+  name: "firebase_core",
+  platforms: [
+    .iOS("12.0"),
+  ],
+  products: [
+    .library(name: "firebase-core", targets: ["firebase_core"]),
+  ],
+  dependencies: [
+    .package(url: "https://github.com/firebase/firebase-ios-sdk", from: firebase_sdk_version),
+  ],
+  targets: [
+    .target(
+      name: "firebase_core",
+      dependencies: [
+        // No product for firebase-core so we pull in the smallest one
+        .product(name: "FirebaseInstallations", package: "firebase-ios-sdk"),
+      ],
+      resources: [
+        .process("Resources"),
+      ],
+      cSettings: [
+        .headerSearchPath("include/firebase_core"),
+        .define("LIBRARY_VERSION", to: "\"\(library_version)\""),
+        .define("LIBRARY_NAME", to: "\"flutter-fire-core\""),
+      ]
+    ),
+  ]
+)