Add CI workflows and update Google.SignIn version

.config/dotnet-tools.json

@@ -0,0 +1,13 @@
+{
+  "version": 1,
+  "isRoot": true,
+  "tools": {
+    "cake.tool": {
+      "version": "0.38.5",
+      "commands": [
+        "dotnet-cake"
+      ]
+    }
+  }
+}
+

.github/workflows/ci.yml

@@ -0,0 +1,52 @@
+name: CI
+
+on:
+  pull_request:
+  push:
+    branches:
+      - main
+  workflow_dispatch:
+    inputs:
+      names:
+        description: "Cake --names (comma-separated)"
+        required: false
+        default: "Google.SignIn"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: macos-14
+    env:
+      CAKE_NAMES: ${{ inputs.names || 'Google.SignIn' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET (global.json)
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+
+      - name: Restore .NET workloads
+        run: dotnet workload restore Xamarin.Google.sln
+
+      - name: Install CocoaPods
+        run: |
+          if ! command -v pod >/dev/null 2>&1; then
+            sudo gem install cocoapods
+          fi
+          pod --version
+
+      - name: Restore tools
+        run: dotnet tool restore
+
+      - name: Build + pack
+        run: dotnet tool run dotnet-cake -- --target=nuget --names="${CAKE_NAMES}"
+
+      - name: Upload packages
+        uses: actions/upload-artifact@v4
+        with:
+          name: nuget
+          path: output/*.nupkg

.github/workflows/publish-github-packages.yml

@@ -0,0 +1,53 @@
+name: Publish (GitHub Packages)
+
+on:
+  push:
+    tags:
+      - "v*"
+  workflow_dispatch:
+    inputs:
+      names:
+        description: "Cake --names (comma-separated)"
+        required: false
+        default: "Google.SignIn"
+
+permissions:
+  contents: read
+  packages: write
+
+jobs:
+  publish:
+    runs-on: macos-14
+    env:
+      CAKE_NAMES: ${{ inputs.names || 'Google.SignIn' }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup .NET (global.json)
+        uses: actions/setup-dotnet@v4
+        with:
+          global-json-file: global.json
+
+      - name: Restore .NET workloads
+        run: dotnet workload restore Xamarin.Google.sln
+
+      - name: Install CocoaPods
+        run: |
+          if ! command -v pod >/dev/null 2>&1; then
+            sudo gem install cocoapods
+          fi
+          pod --version
+
+      - name: Restore tools
+        run: dotnet tool restore
+
+      - name: Build + pack
+        run: dotnet tool run dotnet-cake -- --target=nuget --names="${CAKE_NAMES}"
+
+      - name: Push packages
+        run: |
+          dotnet nuget push "output/*.nupkg" \
+            --source "https://nuget.pkg.github.com/${{ github.repository_owner }}/index.json" \
+            --api-key "${{ secrets.GITHUB_TOKEN }}" \
+            --skip-duplicate

AGENTS.md

@@ -0,0 +1,18 @@
+# Agent Instructions (public OSS)
+
+## Non-negotiables
+- Documentation and samples must be generic (not app-specific).
+- Do not reference private business context.
+- Do not commit secrets; samples must rely on local config templates.
+
+## Working agreements
+- Keep changes reviewable and releaseable (small PR-sized diffs).
+- Prefer minimal disruption to existing package IDs and build scripts.
+
+## Quick commands
+- Build and pack a single component (macOS):
+  - `dotnet tool restore`
+  - `dotnet tool run dotnet-cake -- --target=nuget --names=Google.SignIn`
+
+## CI
+- GitHub Actions should run build/pack validation without requiring any app secrets (publishing uses the built-in `GITHUB_TOKEN`).

Readme.md

@@ -5,6 +5,11 @@ This was a really unfortunate decision from Microsoft. Having these extremely co
 
 Microsoft's current recommendation to iOS.NET developers is that they should write their own bindings using this [slim binding demo project](https://github.com/Redth/DotNet.Platform.SlimBindings) as a guide. However, developers following this approach can find their 'slim bindings' to be incompatible with any other published libraries with dependency conflicts, such as Plugin.Firebase.
 
+## CI and publishing
+
+- Local build instructions: `docs/BUILDING.md`
+- GitHub Packages publishing workflow (NuGet): `docs/PUBLISHING_GITHUB_PACKAGES.md`
+
 # Contributing & Sponsoring
 As a community-supported continuation, I'm happy to review any PRs to help move this project forward. These libraries almost certainly have some missing or stale bindings. Work needs to happen to keep these bindings current with native SDKs. Whole artifacts still need to be converted from where Microsoft left them. Sample projects need to be updated (or rewritten). Tests would be nice.
 

build.cake

@@ -36,6 +36,14 @@ FilePath GetCakeToolPath ()
 	return new FilePath (p.Modules[0].FileName);
 }
 
+string GetDefaultiOSSimulatorRuntimeIdentifier ()
+{
+	var arch = System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture;
+	return arch == System.Runtime.InteropServices.Architecture.Arm64
+		? "iossimulator-arm64"
+		: "iossimulator-x64";
+}
+
 void BuildCake (string target)
 {
 	var cakeSettings = new CakeSettings { 
@@ -184,6 +192,10 @@ Task ("samples")
 	.Does(() =>
 {
 	var msBuildSettings = new DotNetCoreMSBuildSettings ();
+	msBuildSettings.Properties ["Platform"] = new [] { "iPhoneSimulator" };
+	msBuildSettings.Properties ["RuntimeIdentifier"] = new [] { GetDefaultiOSSimulatorRuntimeIdentifier () };
+	msBuildSettings.Properties ["EnableCodeSigning"] = new [] { "false" };
+
 	var dotNetCoreBuildSettings = new DotNetCoreBuildSettings { 
 		Configuration = "Release",
 		Verbosity = DotNetCoreVerbosity.Diagnostic,

components.cake

@@ -23,7 +23,7 @@ Artifact GOOGLE_MAPS_ARTIFACT                      = new Artifact ("Google.Maps"
 Artifact GOOGLE_MOBILE_ADS_ARTIFACT                = new Artifact ("Google.MobileAds",                "8.13.0.3",  "15.0", ComponentGroup.Google, csprojName: "MobileAds");
 Artifact GOOGLE_UMP_ARTIFACT                       = new Artifact ("Google.UserMessagingPlatform",    "1.1.0.1",   "15.0", ComponentGroup.Google, csprojName: "UserMessagingPlatform");
 Artifact GOOGLE_PLACES_ARTIFACT                    = new Artifact ("Google.Places",                   "7.4.0.2",   "15.0", ComponentGroup.Google, csprojName: "Places");
-Artifact GOOGLE_SIGN_IN_ARTIFACT                   = new Artifact ("Google.SignIn",                   "8.0.0.4",   "15.0", ComponentGroup.Google, csprojName: "SignIn");
+Artifact GOOGLE_SIGN_IN_ARTIFACT                   = new Artifact ("Google.SignIn",                   "9.0.0.0",   "15.0", ComponentGroup.Google, csprojName: "SignIn");
 Artifact GOOGLE_TAG_MANAGER_ARTIFACT               = new Artifact ("Google.TagManager",               "7.4.0.2",   "15.0", ComponentGroup.Google, csprojName: "TagManager");
 
 Artifact GOOGLE_GOOGLE_APP_MEASUREMENT_ARTIFACT    = new Artifact ("Google.AppMeasurement",           "12.5.0.4",    "15.0", ComponentGroup.Google, csprojName: "GoogleAppMeasurement");
@@ -233,10 +233,10 @@ void SetArtifactsPodSpecs ()
 		PodSpec.Create ("GooglePlaces", "7.4.0")
 	};
 	GOOGLE_SIGN_IN_ARTIFACT.PodSpecs = new [] {
-		PodSpec.Create ("GoogleSignIn", "8.0.0",  frameworkSource: FrameworkSource.Pods),
-		PodSpec.Create ("AppAuth",      "1.7.6",  frameworkSource: FrameworkSource.Pods),
+		PodSpec.Create ("GoogleSignIn", "~> 9.0.0", frameworkSource: FrameworkSource.Pods),
+		PodSpec.Create ("AppAuth",      "2.0.0",  frameworkSource: FrameworkSource.Pods),
 		PodSpec.Create ("AppCheckCore", "11.2.0", frameworkSource: FrameworkSource.Pods),
-		PodSpec.Create ("GTMAppAuth",   "4.1.1",  frameworkSource: FrameworkSource.Pods),
+		PodSpec.Create ("GTMAppAuth",   "5.0.0",  frameworkSource: FrameworkSource.Pods),
 	};
 	GOOGLE_TAG_MANAGER_ARTIFACT.PodSpecs = new [] {
 		PodSpec.Create ("GoogleTagManager", "7.4.0")

docs/BUILDING.md

@@ -0,0 +1,37 @@
+# Building locally (macOS)
+
+This repo builds .NET iOS/macOS bindings and NuGet packages using Cake.
+
+## Prerequisites
+
+- .NET SDK (see `global.json`)
+- Xcode (matching the installed iOS workload requirements)
+- CocoaPods (`pod`)
+
+Restore the local Cake tool (any version `< 1.0` should work):
+
+```sh
+dotnet tool restore
+```
+
+## Build + pack a component
+
+Build and produce `.nupkg` files into `./output`:
+
+```sh
+dotnet tool run dotnet-cake -- --target=nuget --names=Google.SignIn
+```
+
+## Build samples (using source)
+
+Build sample projects (without publishing packages):
+
+```sh
+dotnet tool run dotnet-cake -- --target=samples --names=Google.SignIn
+```
+
+Clean generated folders:
+
+```sh
+dotnet tool run dotnet-cake -- --target=clean
+```

docs/NUGET_README.md

@@ -0,0 +1,20 @@
+# Overview
+
+This package is part of a set of .NET bindings for Google and Firebase native iOS SDKs.
+
+## Target frameworks
+
+These packages are intended for iOS and Mac Catalyst TFMs (for example `net8.0-ios`, `net9.0-ios`, `net10.0-ios`).
+
+When multi-targeting, condition the reference so it only restores for iOS:
+
+```xml
+<ItemGroup Condition="'$(TargetFramework)' == 'net10.0-ios'">
+  <PackageReference Include="AdamE.Google.iOS.SignIn" Version="9.0.0.0" />
+</ItemGroup>
+```
+
+## Notes on native dependency conflicts
+
+Google/Firebase iOS SDKs share native dependencies (xcframeworks). Avoid mixing multiple independent bindings that ship overlapping Google/Firebase native SDK binaries in the same app, as it can lead to duplicate symbols or runtime issues.
+

docs/PUBLISHING_GITHUB_PACKAGES.md

@@ -0,0 +1,31 @@
+# Publishing to GitHub Packages (NuGet)
+
+This repository can publish `.nupkg` files to GitHub Packages (NuGet feed) via GitHub Actions.
+
+## How publishing works
+
+- A tag push triggers the publish workflow.
+- The workflow builds and packs NuGet packages.
+- Optionally, you can run the workflow manually (`workflow_dispatch`) and pass a custom Cake `--names` value.
+- The workflow pushes packages to:
+  - `https://nuget.pkg.github.com/<OWNER>/index.json`
+
+## Consuming packages
+
+Add GitHub Packages as a NuGet source and authenticate using a GitHub PAT (or workflow token in CI).
+
+Notes:
+- The publish workflow uses the built-in `GITHUB_TOKEN` (no extra repository secret is required).
+- Local development typically uses a GitHub PAT with `read:packages` (and `repo` for private repos).
+
+Create a local `NuGet.Config` (or update your existing one) and add:
+
+```xml
+<configuration>
+  <packageSources>
+    <add key="github" value="https://nuget.pkg.github.com/<OWNER>/index.json" />
+  </packageSources>
+</configuration>
+```
+
+Then restore using credentials for the `<OWNER>` account.

samples/Google/SignIn/SignInExample/AppDelegate.cs

@@ -12,16 +12,23 @@ public class AppDelegate : UIApplicationDelegate
 	{
 		// class-level declarations
 
-		public override UIWindow Window {
+		public override UIWindow? Window {
 			get;
 			set;
 		}
 
-		public override bool FinishedLaunching (UIApplication application, NSDictionary launchOptions)
+		public override bool FinishedLaunching (UIApplication application, NSDictionary? launchOptions)
 		{
-			// You can get the GoogleService-Info.plist file at https://developers.google.com/mobile/add
-			var googleServiceDictionary = NSDictionary.FromFile ("GoogleService-Info.plist");
-			SignIn.SharedInstance.ClientId = googleServiceDictionary ["CLIENT_ID"].ToString ();
+			// For a runnable sample, add your own GoogleService-Info.plist (not committed) and set CLIENT_ID.
+			var googleServiceInfoPath = NSBundle.MainBundle.PathForResource ("GoogleService-Info", "plist");
+			var googleServiceDictionary = !string.IsNullOrWhiteSpace (googleServiceInfoPath)
+				? NSMutableDictionary.FromFile (googleServiceInfoPath)
+				: null;
+
+			var clientId = googleServiceDictionary?["CLIENT_ID"]?.ToString ();
+
+			if (!string.IsNullOrWhiteSpace (clientId))
+				SignIn.SharedInstance.Configuration = new Configuration (clientId);
 
 			return true;
 		}
@@ -40,5 +47,3 @@ public override bool OpenUrl (UIApplication application, NSUrl url, string sourc
 		}
 	}
 }
-
-

samples/Google/SignIn/SignInExample/GoogleService-Info.plist.template

@@ -0,0 +1,17 @@
+<?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>CLIENT_ID</key>
+	<string>YOUR_CLIENT_ID.apps.googleusercontent.com</string>
+	<key>REVERSED_CLIENT_ID</key>
+	<string>com.googleusercontent.apps.YOUR_REVERSED_CLIENT_ID</string>
+	<key>PLIST_VERSION</key>
+	<string>1</string>
+	<key>BUNDLE_ID</key>
+	<string>com.example.signinexample</string>
+	<key>IS_SIGNIN_ENABLED</key>
+	<true/>
+</dict>
+</plist>
+

samples/Google/SignIn/SignInExample/Main.cs

@@ -9,7 +9,7 @@ static void Main (string[] args)
 		{
 			// if you want to use a different Application Delegate class from "AppDelegate"
 			// you can specify it here.
-			UIApplication.Main (args, null, "AppDelegate");
+			UIApplication.Main (args, null, typeof (AppDelegate));
 		}
 	}
 }