Add asmdef for the c# native codebases (#1439)

* Add asmdef for the c# native codebases

* Allow the test apps to see the assembly

* add test app def add allow internal access

* Shuffle around for firebase AI

* Don't need this for functions testing.

* Add in missed asmdef

* Include  tweaks to the testing script and update readme

* Update release notes

Author: AustinBenoit

README.md

@@ -87,6 +87,15 @@ python scripts/build_scripts/build_zips.py --platform=<target platform> --target
 
 > **Note:** Supported library names: analytics, app_check, auth, crashlytics, database, firebaseai, firestore, functions, installations, messaging, remote_config, storage
 
+## Unity Assembly Definitions (.asmdef)
+
+For the assemblies written in C# where the code is directly included in the `unitypackage` or `tgz` (in the case of UPM), we use Unity Assembly Definitions (`.asmdef`). This is required for including pure C# code within Unity Package Manager (`.tgz`) packages.
+
+For now, this is enabled for:
+- **Firebase AI** (`Firebase.FirebaseAI`)
+- **Functions** (`Firebase.Functions`)
+- **App Core** (`Firebase.App.Internal`)
+
 ## Packaging
 
 We can package the built artifacts to better imported by Unity Editor.

app/src/internal/AssemblyInfo.cs

@@ -0,0 +1,6 @@
+using System.Runtime.CompilerServices;
+
+// Grant native C# Unity packages access to Firebase.App's internal helpers
+[assembly: InternalsVisibleTo("Firebase.Functions")]
+[assembly: InternalsVisibleTo("Firebase.FirebaseAI")]
+[assembly: InternalsVisibleTo("Firebase.FirebaseAI.TestApp")]

app/src/internal/AssemblyInfo.cs.meta

@@ -0,0 +1,17 @@
+{
+    "name": "Firebase.App.Internal",
+    "rootNamespace": "Firebase.Internal",
+    "references": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": true,
+    "precompiledReferences": [
+        "Firebase.App.dll",
+        "Firebase.Platform.dll"
+    ],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}

app/src/internal/Firebase.App.Internal.asmdef

@@ -113,6 +113,8 @@ Release Notes
 -   Changes
     - Firebase AI: Add support for Grounding with Google Maps.
     - Storage: Added `ListAsync` API to list items and prefixes under a reference.
+    - Functions: Fixed tgz export, added missing asmdef for functions. Fixes issue where Functions were not being exported correctly in the tgz build.
+    - Firebase AI: Fix tgz export, added missing asmdef for Firebase AI. Fixes issue where Firebase AI was not being exported correctly in the tgz build.
 
 ### 13.10.0
 -   Changes

app/src/internal/Firebase.App.Internal.asmdef.meta

@@ -0,0 +1,2 @@
+using System.Runtime.CompilerServices;
+[assembly: InternalsVisibleTo("Firebase.FirebaseAI.TestApp")]

docs/readme.md

@@ -0,0 +1,20 @@
+{
+    "name": "Firebase.FirebaseAI",
+    "rootNamespace": "Firebase.AI",
+    "references": [
+        "Firebase.App.Internal"
+    ],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": true,
+    "precompiledReferences": [
+        "Firebase.App.dll",
+        "Firebase.Platform.dll",
+        "Google.MiniJson.dll"
+    ],
+    "autoReferenced": true,
+    "defineConstraints": [],
+    "versionDefines": [],
+    "noEngineReferences": false
+}