[ci] Install JetBrains OpenJDK 8, 11

Context: #4567

We want to support using OpenJDK 11 to build Xamarin.Android projects.
For better or worse, we can't "change the entire world," not all at
once.  In particular, the Android Designer Integration Tests do not
currently support building with or running under JDK 11.

"Split the difference", kind of: Instead of installing Corretto JDK 8
into `$HOME/android-toolchain/jdk`, install JetBrains OpenJDK 8 and 11
into the new paths:

  * `$HOME/android-toolchain/jdk-1.8`
  * `$HOME/android-toolchain/jdk-11`

We will continue *using* JDK 1.8 by default, until PR #4567 is ready
to completely merge, at which point we'll use JDK 11 to build
Xamarin.Android, while continuing to use JDK 1.8 with the Designer.

Author: grendello

build-tools/automation/azure-pipelines-oss.yaml

@@ -17,6 +17,7 @@ pr:
 # Predefined variables: https://docs.microsoft.com/en-us/azure/devops/pipelines/build/variables?view=azure-devops&tabs=yaml
 # https://dev.azure.com/xamarin/public/_apps/hub/ms.vss-ciworkflow.build-ci-hub?_a=edit-build-definition&id=48&view=Tab_Variables
 variables:
+  XA.Jdk.Folder: jdk-1.8
   XA.Build.MacOSSPool: VSEng-Xamarin-RedmondMacMojaveBuildPool-Android-OSS
   XA.Build.LinuxOSSPool: Xamarin-Android-Ubuntu-Public
 
@@ -157,7 +158,7 @@ stages:
     - script: echo "##vso[task.setvariable variable=HOME]$(Agent.HomeDirectory)"
       displayName: set HOME to agent directory
 
-    - script: echo "##vso[task.setvariable variable=PATH]$PATH:$(Agent.HomeDirectory)/android-toolchain/jdk/bin"
+    - script: echo "##vso[task.setvariable variable=PATH]$PATH:$(Agent.HomeDirectory)/android-toolchain/$(XA.Jdk.Folder)/bin"
       displayName: append jdk tools to PATH
 
     - script: make jenkins V=1 PREPARE_CI_PR=1 PREPARE_AUTOPROVISION=1 CONFIGURATION=$(XA.Build.Configuration)

build-tools/automation/azure-pipelines.yaml

@@ -44,6 +44,7 @@ resources:
 
 # Global variables
 variables:
+  XA.Jdk.Folder: jdk-1.8
   NuGetArtifactName: nupkgs
   InstallerArtifactName: installers
   TestAssembliesArtifactName: test-assemblies
@@ -96,7 +97,7 @@ stages:
     - checkout: self
       submodules: recursive
 
-    - script: echo "##vso[task.setvariable variable=JAVA_HOME]$HOME/Library/Android/jdk"
+    - script: echo "##vso[task.setvariable variable=JAVA_HOME]$HOME/Library/Android/$(XA.Jdk.Folder)"
       displayName: set JAVA_HOME
 
     - template: yaml-templates/use-dot-net.yaml

build-tools/xaprepare/xaprepare/ConfigAndData/Configurables.Linux.cs

@@ -4,6 +4,8 @@ namespace Xamarin.Android.Prepare
 {
 	partial class Configurables
 	{
+		const string JetBrainsOpenJDKOperatingSystem = "linux-x64";
+
 		partial class Urls
 		{
 			public static readonly Uri Corretto = new Uri ($"{Corretto_BaseUri}{CorrettoUrlPathVersion}/amazon-corretto-{CorrettoDistVersion}-linux-x64.tar.gz");

build-tools/xaprepare/xaprepare/ConfigAndData/Configurables.MacOS.cs

@@ -4,10 +4,7 @@ namespace Xamarin.Android.Prepare
 {
 	partial class Configurables
 	{
-		partial class Urls
-		{
-			public static readonly Uri Corretto = new Uri ($"{Corretto_BaseUri}{CorrettoUrlPathVersion}/amazon-corretto-{CorrettoDistVersion}-macosx-x64.tar.gz");
-		}
+		const string JetBrainsOpenJDKOperatingSystem = "osx-x64";
 
 		partial class Defaults
 		{

build-tools/xaprepare/xaprepare/ConfigAndData/Configurables.Windows.cs

@@ -5,26 +5,11 @@ namespace Xamarin.Android.Prepare
 {
 	partial class Configurables
 	{
-		partial class Urls
-		{
-			public static Uri Corretto => GetWindowsCorrettoUrl ();
-
-			public static readonly Uri Corretto64 = new Uri ($"{Corretto_BaseUri}{CorrettoUrlPathVersion}/amazon-corretto-{CorrettoDistVersion}-windows-x64-jdk.zip");
-			public static readonly Uri Corretto32 = new Uri ($"{Corretto_BaseUri}{CorrettoUrlPathVersion}/amazon-corretto-{CorrettoDistVersion}-windows-x86-jdk.zip");
-
-			static Uri GetWindowsCorrettoUrl ()
-			{
-				if (Context.Instance.OS == null)
-					return Corretto64;
-
-				return Context.Instance.OS.Is64Bit ? Corretto64 : Corretto32;
-			}
-		}
+		const string JetBrainsOpenJDKOperatingSystem = "windows-x64";
 
 		partial class Defaults
 		{
 			public const string NativeLibraryExtension = ".dll";
-			public static readonly Version CorrettoVersion = Version.Parse (CorrettoDistVersion);
 		}
 
 		partial class Paths

build-tools/xaprepare/xaprepare/ConfigAndData/Configurables.cs

@@ -15,15 +15,30 @@ namespace Xamarin.Android.Prepare
 	//
 	partial class Configurables
 	{
+		const string JetBrainsOpenJDK11Version = "11.0.4";
+		const string JetBrainsOpenJDK11Release = "546.1";
+		static readonly string JetBrainsOpenJDK11DownloadVersion = JetBrainsOpenJDK11Version.Replace ('.', '_');
+
+		const string JetBrainsOpenJDK8Version = "8.202";
+		const string JetBrainsOpenJDK8Release = "1483.37";
+		static readonly string JetBrainsOpenJDK8DownloadVersion = JetBrainsOpenJDK8Version.Replace ('.', 'u');
+
 		const string CorrettoDistVersion = "8.242.08.1";
 		const string CorrettoUrlPathVersion = CorrettoDistVersion;
 
 		static Context ctx => Context.Instance;
 
 		public static partial class Urls
 		{
-			// Keep the trailing slash here - OS-specific code assumes it's there.
-			public const string Corretto_BaseUri = "https://corretto.aws/downloads/resources/";
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-8u202-linux-x64-b1483.37.tar.gz
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-8u202-osx-x64-b1483.37.tar.gz
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-8u202-windows-x64-b1483.37.tar.gz
+			public static readonly Uri JetBrainsOpenJDK8 = new Uri ($"https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-{JetBrainsOpenJDK8DownloadVersion}-{JetBrainsOpenJDKOperatingSystem}-b{JetBrainsOpenJDK8Release}.tar.gz");
+
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-11_0_4-linux-x64-b546.1.tar.gz
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-11_0_4-osx-x64-b546.1.tar.gz
+			// https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-11_0_4-windows-x64-b546.1.tar.gz
+			public static readonly Uri JetBrainsOpenJDK11 = new Uri ($"https://bintray.com/jetbrains/intellij-jdk/download_file?file_path=jbrsdk-{JetBrainsOpenJDK11DownloadVersion}-{JetBrainsOpenJDKOperatingSystem}-b{JetBrainsOpenJDK11Release}.tar.gz");
 
 			/// <summary>
 			///   Base URL for all Android SDK and NDK downloads. Used in <see cref="AndroidToolchain"/>
@@ -39,6 +54,14 @@ public static partial class Defaults
 		{
 			public static readonly char[] PropertyListSeparator            = new [] { ':' };
 
+			public static readonly string JdkFolder                        = "jdk-1.8";
+
+			public static readonly Version JetBrainsOpenJDK11Version = new Version (Configurables.JetBrainsOpenJDK11Version);
+			public static readonly Version JetBrainsOpenJDK11Release = new Version (Configurables.JetBrainsOpenJDK11Release);
+
+			public static readonly Version JetBrainsOpenJDK8Version = new Version (Configurables.JetBrainsOpenJDK8Version);
+			public static readonly Version JetBrainsOpenJDK8Release = new Version (Configurables.JetBrainsOpenJDK8Release);
+
 			// Mono runtimes
 			public const string DebugFileExtension                         = ".pdb";
 			public const string MonoHostMingwRuntimeNativeLibraryExtension = WindowsDLLSuffix;
@@ -104,9 +127,9 @@ public static partial class Defaults
 			public const int DefaultMaximumParallelTasks = 5;
 
 			/// <summary>
-			///   The maximum JDK version we support. Note: this will probably go away with Corretto
+			///   The maximum JDK version we support.
 			/// </summary>
-			public const int MaxJDKVersion = 8;
+			public static readonly Version MaxJDKVersion = new Version (11, 99, 0);
 
 			/// <summary>
 			///   Prefix for all the log files created by the bootstrapper.
@@ -314,10 +337,12 @@ public static partial class Paths
 			public static string Mingw32CmakePath                    => GetCachedPath (ref mingw32CmakePath, ()                    => Path.Combine (BuildBinDir, "mingw-32.cmake"));
 			public static string Mingw64CmakePath                    => GetCachedPath (ref mingw64CmakePath, ()                    => Path.Combine (BuildBinDir, "mingw-64.cmake"));
 
-			// Corretto OpenJDK
-			public static string CorrettoCacheDir                    => GetCachedPath (ref correttoCacheDir, ()                    => ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainCacheDirectory));
-			public static string CorrettoInstallDir                  => GetCachedPath (ref correttoInstallDir, ()                  => Path.Combine (ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainDirectory), "jdk"));
+			// JetBrains OpenJDK
+			public static string OpenJDK8InstallDir                  => GetCachedPath (ref openJDK8InstallDir, ()                   => Path.Combine (ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainDirectory), "jdk-1.8"));
+			public static string OpenJDK8CacheDir                    => GetCachedPath (ref openJDK8CacheDir, ()                     => ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainCacheDirectory));
 
+			public static string OpenJDK11InstallDir                 => GetCachedPath (ref openJDK11InstallDir, ()                   => Path.Combine (ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainDirectory), "jdk-11"));
+			public static string OpenJDK11CacheDir                   => GetCachedPath (ref openJDK11CacheDir, ()                     => ctx.Properties.GetRequiredValue (KnownProperties.AndroidToolchainCacheDirectory));
 			// bundle
 			public static string BCLTestsArchiveName                 = "bcl-tests.zip";
 
@@ -403,6 +428,8 @@ static string GetCachedPath (ref string? variable, Func<string> creator)
 			static string? monoSdksTpnExternalPath;
 			static string? monoSDKSIncludeDestDir;
 			static string? monoLlvmTpnPath;
+			static string? openJDK8InstallDir,  openJDK11InstallDir;
+			static string? openJDK8CacheDir,    openJDK11CacheDir;
 		}
 	}
 }

build-tools/xaprepare/xaprepare/OperatingSystems/OS.cs

@@ -184,7 +184,7 @@ protected virtual bool InitOS ()
 			JavaHome = Context.Instance.Properties.GetValue (KnownProperties.JavaSdkDirectory)?.Trim () ?? String.Empty;
 			if (String.IsNullOrEmpty (JavaHome)) {
 				var androidToolchainDirectory = Context.Instance.Properties.GetValue (KnownProperties.AndroidToolchainDirectory)?.Trim ();
-				JavaHome = Path.Combine (androidToolchainDirectory, "jdk");
+				JavaHome = Path.Combine (androidToolchainDirectory, Configurables.Defaults.JdkFolder);
 			}
 
 			string extension = IsWindows ? ".exe" : string.Empty;

build-tools/xaprepare/xaprepare/Scenarios/Scenario_AndroidToolchain.cs

@@ -6,12 +6,13 @@ namespace Xamarin.Android.Prepare
 	partial class Scenario_AndroidToolchain : ScenarioNoStandardEndSteps
 	{
 		public Scenario_AndroidToolchain () 
-			: base ("AndroidToolchain", "Install Android SDK, NDK and Corretto JDK.")
+			: base ("AndroidToolchain", "Install Android SDK, NDK and OpenJDK.")
 		{}
 
 		protected override void AddSteps (Context context)
 		{
-			Steps.Add (new Step_InstallCorrettoOpenJDK ());
+			Steps.Add (new Step_InstallJetBrainsOpenJDK8 ());
+			Steps.Add (new Step_InstallJetBrainsOpenJDK11 ());
 			Steps.Add (new Step_Android_SDK_NDK ());
 
 			// disable installation of missing programs...

build-tools/xaprepare/xaprepare/Scenarios/Scenario_Standard.cs

@@ -19,7 +19,8 @@ protected override void AddSteps (Context context)
 				throw new ArgumentNullException (nameof (context));
 
 			Steps.Add (new Step_ShowEnabledRuntimes ());
-			Steps.Add (new Step_InstallCorrettoOpenJDK ());
+			Steps.Add (new Step_InstallJetBrainsOpenJDK8 ());
+			Steps.Add (new Step_InstallJetBrainsOpenJDK11 ());
 			Steps.Add (new Step_Android_SDK_NDK ());
 			Steps.Add (new Step_GenerateFiles (atBuildStart: true));
 			Steps.Add (new Step_PrepareProps ());