dotnet · jonathanpeppers · May 21, 2026 · May 21, 2026 · May 21, 2026 · May 21, 2026
@@ -111,8 +111,37 @@
     <XABuildToolsHashMacOS>04E7F3A72044DE4926FA038FA0E251A37BBA1E1C3FB8BEAB6F8401BFD9EB4BF3</XABuildToolsHashMacOS>
     <XABuildToolsHashLinux>5D9AC77FB6FF43D9DA518A337B4FCF8F9097113DF531D99CCEFE80EF7CE8250B</XABuildToolsHashLinux>
     <XABuildToolsHashWindows>AA1095CB14D83E483818A748A2C06FAAEB8E601561B06A356A119A1B2CA280D3</XABuildToolsHashWindows>
-    <XAPlatformToolsPackagePrefix Condition=" '$(HostOS)' == 'Darwin' "></XAPlatformToolsPackagePrefix>
     <XAPlatformToolsVersion>36.0.0</XAPlatformToolsVersion>
+    <XAPlatformToolsHashMacOS>D3E9FA1DF3345CF728586908426615A60863D2632F73F1CE14F0F1349EF000FD</XAPlatformToolsHashMacOS>
+    <XAPlatformToolsHashLinux>0EAD642C943FFE79701FCCCA8F5F1C69C4CE4F43DF2EEFEE553F6CCB27CBFBE8</XAPlatformToolsHashLinux>
+    <XAPlatformToolsHashWindows>12C2841F354E92A0EB2FD7BF6F0F9BF8538ABCE7BD6B060AC8349D6F6A61107C</XAPlatformToolsHashWindows>
+    <XACmdlineToolsHashMacOS>5673201E6F3869F418EEED3B5CB6C4BE7401502BD0AAE1B12A29D164D647A54E</XACmdlineToolsHashMacOS>
+    <XACmdlineToolsHashLinux>7EC965280A073311C339E571CD5DE778B9975026CFCBE79F2B1CDCB1E15317EE</XACmdlineToolsHashLinux>
+    <XACmdlineToolsHashWindows>98B565CB657B012DAE6794CEFC0F66AE1EFB4690C699B78A614B4A6A3505B003</XACmdlineToolsHashWindows>
+    <XACmakeHashMacOS>57024D590691B9D66977D2F66786F10971549441B33B7830D3D2B659F80B93EA</XACmakeHashMacOS>
+    <XACmakeHashLinux>8CF0DC4F7CE0173D13ED71066FB6861A79C73545DF71D12CA3E933430F268D50</XACmakeHashLinux>
+    <XACmakeHashWindows>026982DBA2DBD2DE4A530CF1300FFAD05F6BC7D372D9DF83D46112FE017E0C6B</XACmakeHashWindows>
+    <!-- Android emulator: per-host zips (and per-arch on macOS). -->
+    <XAEmulatorHashMacOSx64>3029489D4B2F868DC5347AA27B1E52FB48D6D28ABD51278E3FBEC2EE73201EDF</XAEmulatorHashMacOSx64>
+    <XAEmulatorHashMacOSArm64>EDA85B9BFFD0926B7A01EA334A30AB41827F573CBDE8F7F97FCD8C5B38F039F6</XAEmulatorHashMacOSArm64>
+    <XAEmulatorHashLinux>58BFDF0572F06EC007A7287154CDC6B2EBFEA947D07A1E26A0F6B5E1A39E9191</XAEmulatorHashLinux>
+    <XAEmulatorHashWindows>9F2855BFE98E80728E61D45B0EA72BA22F64952C9330559FA4E2CD3698A32231</XAEmulatorHashWindows>
+    <!-- API 29 system image used by the emulator: per-host (x86_64) and macOS arm64 (arm64-v8a). -->
+    <XASystemImageHashMacOSx64>B5C3FDA1F4B4931C30518D342E4AD5F7464945E0CDCED3538D4FF2E12F7BF201</XASystemImageHashMacOSx64>
+    <XASystemImageHashMacOSArm64>7FD1610E16A69AC2E202278E82077DE134CE404FE099D872019F69F3A340ACDD</XASystemImageHashMacOSArm64>
+    <XASystemImageHashLinux>B5C3FDA1F4B4931C30518D342E4AD5F7464945E0CDCED3538D4FF2E12F7BF201</XASystemImageHashLinux>
+    <XASystemImageHashWindows>B5C3FDA1F4B4931C30518D342E4AD5F7464945E0CDCED3538D4FF2E12F7BF201</XASystemImageHashWindows>
+    <!-- SDK build dependencies (host-agnostic single zip each). -->
+    <XAAndroidM2RepositoryHash>A3F91808DCE50C1717737DE90C18479ED3A78B147E06985247D138E7AB5123D0</XAAndroidM2RepositoryHash>
+    <XAAndroidDocsHash>68DB2690CB92E4EE5373AC9B792642C90717D8F417D83ECCEA48781171B3182A</XAAndroidDocsHash>
+    <XAAndroidSourcesHash>BD97900346A70C784AC8B15C809539DDEF34ED3B5BE1DF8A9A89CF298BE93798</XAAndroidSourcesHash>
+    <!-- Android NDK: per-host zips. Use a private property name; the public
+         $(AndroidNdkVersion) is set to the pkg revision in Common.props.in. -->
+    <_XAAndroidNdkRelease>28c</_XAAndroidNdkRelease>
+    <_XAAndroidNdkPkgRevision>28.2.13676358</_XAAndroidNdkPkgRevision>
+    <XAAndroidNdkHashMacOS>0D4599E8BBF1A1668A0D51A541729B2246360F350018A2081D0B302DBB594F2A</XAAndroidNdkHashMacOS>
+    <XAAndroidNdkHashLinux>DFB20D396DF28CA02A8C708314B814A4D961DC9074F9A161932746F815AA552F</XAAndroidNdkHashLinux>
+    <XAAndroidNdkHashWindows>6BEC98AC2354D8A919760889A1A41D020132E5E8CFA1B1FE51610A72C36A466B</XAAndroidNdkHashWindows>
     <XABundleToolVersion Condition="'$(XABundleToolVersion)' == ''">1.18.3</XABundleToolVersion>
     <XABundleToolHash Condition="'$(XABundleToolHash)' == ''">A099CFA1543F55593BC2ED16A70A7C67FE54B1747BB7301F37FDFD6D91028E29</XABundleToolHash>
     <XABinutilsVersion Condition="'$(XABinutilsVersion)' == ''">L_18.1.6-8.0.0-1</XABinutilsVersion>

@@ -52,15 +52,15 @@ steps:
 
 - template: /build-tools/automation/yaml-templates/run-xaprepare.yaml
   parameters:
-    arguments: --s=${{ parameters.xaprepareScenario }}  --android-sdk-platforms="${{ parameters.androidSdkPlatforms }}"
+    arguments: --s=${{ parameters.xaprepareScenario }}
     xaSourcePath: ${{ parameters.xaSourcePath }}
 
 - template: /build-tools/automation/yaml-templates/run-dotnet-preview.yaml
   parameters:
     displayName: install OpenJDK and accept Android SDK licenses
     xaSourcePath: ${{ parameters.xaSourcePath }}
     project: ${{ parameters.xaSourcePath }}/src/androidsdk/androidsdk.csproj
-    arguments: -c ${{ parameters.configuration }} -bl:${{ parameters.xaSourcePath }}/bin/Test${{ parameters.configuration }}/androidsdk.binlog
+    arguments: -c ${{ parameters.configuration }} -p:AndroidSdkPlatforms="${{ parameters.androidSdkPlatforms }}" -bl:${{ parameters.xaSourcePath }}/bin/Test${{ parameters.configuration }}/androidsdk.binlog
     continueOnError: false
 
 - task: DotNetCoreCLI@2

@@ -15,11 +15,12 @@ This generally only needs to be done each time we bind a new Android API level.
 
 # How to use
 
-Ensure all Android platform SDK levels are installed.  This can be done with `xaprepare`;
-run the following command from the checkout toplevel:
+Ensure all Android platform SDK levels are installed.  This is done via the
+`androidsdk.csproj` project; run the following command from the checkout
+toplevel:
 
 ```dotnetcli
-dotnet run --project "build-tools/xaprepare/xaprepare/xaprepare.csproj" -- -s AndroidTestDependencies --android-sdk-platforms=all
+dotnet build src/androidsdk/androidsdk.csproj -p:AndroidSdkPlatforms=all
 ```
 
 Next, from this directory, run:

@@ -9,17 +9,26 @@ namespace Xamarin.Android.Prepare
 {
 	partial class BuildInfo : AppObject
 	{
-		static readonly char[] NDKPropertySeparator = new [] { '=' };
-
 		public string CommitOfLastVersionChange { get; private set; } = String.Empty;
 
-		// Not available from the start, only after NDK is installed
-		public string NDKRevision            { get; private set; } = String.Empty;
-		public string NDKVersionMajor        { get; private set; } = String.Empty;
-		public string NDKVersionMinor        { get; private set; } = String.Empty;
-		public string NDKVersionMicro        { get; private set; } = String.Empty;
-		public string NDKVersionTag          { get; private set; } = String.Empty;
-		public string NDKMinimumApiAvailable { get; private set; } = String.Empty;
+		// NDK version info is now derived directly from BuildAndroidPlatforms.AndroidNdkPkgRevision
+		// (single source of truth shared with src/androidsdk/androidsdk.targets via Configuration.props).
+		public string NDKRevision => BuildAndroidPlatforms.AndroidNdkPkgRevision;
+		public string NDKVersionMajor => NDKVersion.Major.ToString ();
+		public string NDKVersionMinor => NDKVersion.Minor.ToString ();
+		public string NDKVersionMicro => NDKVersion.Build.ToString ();
+
+		Version? cachedNdkVersion;
+		Version NDKVersion {
+			get {
+				if (cachedNdkVersion != null)
+					return cachedNdkVersion;
+				if (!Utilities.ParseAndroidPkgRevision (BuildAndroidPlatforms.AndroidNdkPkgRevision, out Version? ver, out _) || ver == null)
+					throw new InvalidOperationException ($"Unable to parse NDK revision '{BuildAndroidPlatforms.AndroidNdkPkgRevision}' as a valid version string");
+				cachedNdkVersion = ver;
+				return ver;
+			}
+		}
 
 		public string VersionHash            { get; private set; } = String.Empty;
 		public string XACommitHash           { get; private set; } = String.Empty;
@@ -44,70 +53,6 @@ void DetermineXACommitInfo (Context context)
 			XABranch = git.GetBranchName ();
 		}
 
-		public bool GatherNDKInfo (Context context)
-		{
-			string ndkDir = Configurables.Paths.AndroidNdkDirectory;
-			string props = Path.Combine (ndkDir, "source.properties");
-			if (!File.Exists (props)) {
-				Log.ErrorLine ("NDK properties file does not exist: ", props, tailColor: Log.DestinationColor);
-				return false;
-			}
-
-			string[] lines = File.ReadAllLines (props);
-			foreach (string l in lines) {
-				string line = l.Trim ();
-				string[] parts = line.Split (NDKPropertySeparator, 2);
-				if (parts.Length != 2)
-					continue;
-
-				if (String.Compare ("Pkg.Revision", parts [0].Trim (), StringComparison.Ordinal) != 0)
-					continue;
-
-				string rev = parts [1].Trim ();
-				NDKRevision = rev;
-
-				if (!Utilities.ParseAndroidPkgRevision (rev, out Version? ver, out string? tag) || ver == null) {
-					Log.ErrorLine ($"Unable to parse NDK revision '{rev}' as a valid version string");
-					return false;
-				}
-
-				NDKVersionMajor = ver.Major.ToString ();
-				NDKVersionMinor = ver.Minor.ToString ();
-				NDKVersionMicro = ver.Build.ToString ();
-				NDKVersionTag = tag ?? String.Empty;
-				break;
-			}
-
-			Log.DebugLine ($"Looking for minimum API available in {ndkDir}");
-			int minimumApi = Int32.MaxValue;
-			foreach (var kvp in Configurables.Defaults.AndroidToolchainPrefixes) {
-				string dirName = kvp.Value;
-				string platforms = Path.Combine (Configurables.Paths.AndroidToolchainSysrootLibDirectory, dirName);
-				Log.DebugLine ($"  searching in {platforms}");
-				foreach (string p in Directory.EnumerateDirectories (platforms, "*", SearchOption.TopDirectoryOnly)) {
-					string plibc = Path.Combine (p, "libc.so");
-					if (!Utilities.FileExists (plibc)) {
-						continue;
-					}
-
-					Log.DebugLine ($"    found {p}");
-					string pdir = Path.GetFileName (p);
-					int api;
-					if (!Int32.TryParse (pdir, out api))
-						continue;
-
-					if (api >= minimumApi)
-						continue;
-
-					minimumApi = api;
-				}
-			}
-
-			Log.DebugLine ($"Detected minimum NDK API level: {minimumApi}");
-			NDKMinimumApiAvailable = minimumApi.ToString ();
-			return true;
-		}
-
 		async Task DetermineLastVersionChangeCommit (Context context)
 		{
 			Log.StatusLine ($"  {context.Characters.Bullet} Commit of last version change", ConsoleColor.Gray);

@@ -277,16 +277,6 @@ public string DebugFileExtension {
 			}
 		}
 
-		/// <summary>
-		///   Collection of programs or dependencies which should be reinstalled.
-		/// </summary>
-		public RefreshableComponent ComponentsToRefresh { get; set; }
-
-		/// <summary>
-		///   Collection of Android SDK platform levels to be installed.
-		/// </summary>
-		public IEnumerable<string> AndroidSdkPlatforms { get; set; } = Enumerable.Empty<string> ();
-
 		/// <summary>
 		///   Path to a local .NET SDK archive to use instead of downloading.
 		/// </summary>

@@ -2,9 +2,6 @@ namespace Xamarin.Android.Prepare
 {
 	static class KnownProperties
 	{
-		public const string AndroidCmakeUrlPrefix               = "AndroidCmakeUrlPrefix";
-		public const string AndroidCmakeVersion                 = "AndroidCmakeVersion";
-		public const string AndroidCmakeVersionPath             = "AndroidCmakeVersionPath";
 		public const string AndroidMinimumDotNetApiLevel        = "AndroidMinimumDotNetApiLevel";
 		public const string AndroidDefaultTargetDotnetApiLevel  = "AndroidDefaultTargetDotnetApiLevel";
 		public const string AndroidLatestStableApiLevel         = "AndroidLatestStableApiLevel";
@@ -56,6 +53,5 @@ static class KnownProperties
 		public const string XAInstallPrefix                     = "XAInstallPrefix";
 		public const string XAPackagesDir                       = "XAPackagesDir";
 		public const string XAPlatformToolsVersion              = "XAPlatformToolsVersion";
-		public const string XAPlatformToolsPackagePrefix        = "XAPlatformToolsPackagePrefix";
 	}
 }
@@ -6,9 +6,6 @@ namespace Xamarin.Android.Prepare
 	{
 		void InitDefaults ()
 		{
-			properties.Add (KnownProperties.AndroidCmakeUrlPrefix,               StripQuotes ("@AndroidCmakeUrlPrefix@"));
-			properties.Add (KnownProperties.AndroidCmakeVersion,                 StripQuotes ("@AndroidCmakeVersion@"));
-			properties.Add (KnownProperties.AndroidCmakeVersionPath,             StripQuotes (@"@AndroidCmakeVersionPath@"));
 			properties.Add (KnownProperties.AndroidMinimumDotNetApiLevel,        StripQuotes ("@AndroidMinimumDotNetApiLevel@"));
 			properties.Add (KnownProperties.AndroidDefaultTargetDotnetApiLevel,  StripQuotes ("@AndroidDefaultTargetDotnetApiLevel@"));
 			properties.Add (KnownProperties.AndroidLatestStableApiLevel,         StripQuotes ("@AndroidLatestStableApiLevel@"));
@@ -60,7 +57,6 @@ namespace Xamarin.Android.Prepare
 			properties.Add (KnownProperties.XAInstallPrefix,                     StripQuotes (@"@XAInstallPrefix@"));
 			properties.Add (KnownProperties.XAPackagesDir,                       StripQuotes (@"@XAPackagesDir@"));
 			properties.Add (KnownProperties.XAPlatformToolsVersion,              StripQuotes ("@XAPlatformToolsVersion@"));
-			properties.Add (KnownProperties.XAPlatformToolsPackagePrefix,        StripQuotes ("@XAPlatformToolsPackagePrefix@"));
 		}
 
 		string StripQuotes (string input)

@@ -11,7 +11,6 @@ partial class Defaults
 
 		partial class Paths
 		{
-			public const string NdkToolchainOSTag = "linux-x86_64";
 		}
 	}
 }
@@ -12,7 +12,6 @@ partial class Defaults
 		partial class Paths
 		{
 			public const string MonoCrossRuntimeInstallPath = "Darwin";
-			public const string NdkToolchainOSTag = "darwin-x86_64";
 		}
 	}
 }
@@ -12,7 +12,6 @@ partial class Defaults
 
 		partial class Paths
 		{
-			public const string NdkToolchainOSTag                                 = "windows-x86_64";
 		}
 
 		partial class Urls
-Original file line number
+Diff line change
@@ Expand Up / @@ -11,7 +11,6 @@ partial class Defaults @@
     		partial class Paths
     		{
-    			public const string NdkToolchainOSTag = "linux-x86_64";
     		}
     	}
     }