Set OS context details on Android (#1716)

CHANGELOG.md

@@ -30,6 +30,7 @@
   - Update Sentry-Android to 6.0.0 ([#1697](https://github.com/getsentry/sentry-dotnet/pull/1697))
   - Set Java/Android SDK options ([#1694](https://github.com/getsentry/sentry-dotnet/pull/1694))
   - Refactor and update Android options ([#1705](https://github.com/getsentry/sentry-dotnet/pull/1705))
+  - Add Android OS information to the event context ([#1716](https://github.com/getsentry/sentry-dotnet/pull/1716))
 
 ### Fixes
 

src/Sentry/Android/AndroidEventProcessor.cs

@@ -27,11 +27,12 @@ public SentryEvent Process(SentryEvent @event)
     {
         // Get what information we can ourselves first
         @event.Contexts.Device.ApplyFromAndroidRuntime();
+        @event.Contexts.OperatingSystem.ApplyFromAndroidRuntime();
 
         // Copy more information from the Android SDK
         if (_androidProcessor is { } androidProcessor)
         {
-            // TODO: Can we gather more device data directly and remove this?
+            // TODO: Can we gather more data directly and remove this?
 
             // Run a fake event through the Android processor, so we can get context info from the Android SDK.
             // We'll want to do this every time, so that all information is current. (ex: device orientation)
@@ -43,6 +44,10 @@ public SentryEvent Process(SentryEvent @event)
             {
                 @event.Contexts.Device.ApplyFromSentryAndroidSdk(device);
             }
+            if (e.Contexts.OperatingSystem is { } os)
+            {
+                @event.Contexts.OperatingSystem.ApplyFromSentryAndroidSdk(os);
+            }
         }
 
         return @event;

src/Sentry/Android/Extensions/OperatingSystemExtensions.cs

@@ -0,0 +1,36 @@
+using System.Runtime.InteropServices;
+using OperatingSystem = Sentry.Protocol.OperatingSystem;
+
+namespace Sentry.Android.Extensions;
+
+internal static class OperatingSystemExtensions
+{
+    public static void ApplyFromAndroidRuntime(this OperatingSystem operatingSystem)
+    {
+        operatingSystem.Name ??= "Android";
+        operatingSystem.Version ??= AndroidBuild.VERSION.Release;
+        operatingSystem.Build ??= AndroidBuild.Display;
+
+        if (operatingSystem.KernelVersion == null)
+        {
+            // ex: "Linux 5.10.98-android13-0-00003-g6ea688a79989-ab8162051 #1 SMP PREEMPT Tue Feb 8 00:20:26 UTC 2022"
+            var osParts = RuntimeInformation.OSDescription.Split(' ');
+            if (osParts.Length >= 2 && osParts[1].Contains("android", StringComparison.OrdinalIgnoreCase))
+            {
+                // ex: "5.10.98-android13-0-00003-g6ea688a79989-ab8162051"
+                operatingSystem.KernelVersion = osParts[1];
+            }
+        }
+
+        // operatingSystem.RawDescription is already set in Enricher.cs
+    }
+
+    public static void ApplyFromSentryAndroidSdk(this OperatingSystem operatingSystem, Java.Protocol.OperatingSystem os)
+    {
+        // We already have everything above, except the Rooted flag.
+        // The Android SDK figures this out in RootChecker.java
+        // TODO: Consider porting the Java root checker to .NET.  We probably have access to all the same information.
+        // https://github.com/getsentry/sentry-java/blob/main/sentry-android-core/src/main/java/io/sentry/android/core/internal/util/RootChecker.java
+        operatingSystem.Rooted ??= os.IsRooted()?.BooleanValue();
+    }
+}