Add tooling to help with binding Kotlin libraries

Util/Xamarin.Kotlin.BindingSupport/LICENSE

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+The MIT License (MIT)
+
+Copyright (c) .NET Foundation Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+20170823

Util/Xamarin.Kotlin.BindingSupport/build.cake

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+
+var TARGET = Argument("t", Argument("target", "Default"));
+
+var PACKAGE_VERSION = "0.1.0-preview";
+
+Task("externals")
+	.Does(() =>
+{
+	EnsureDirectoryExists("./externals/");
+	if (!FileExists("./externals/kotlin-stdlib-1.2.jar"))
+		DownloadFile(
+			"https://search.maven.org/remotecontent?filepath=org/jetbrains/kotlin/kotlin-stdlib/1.2.71/kotlin-stdlib-1.2.71.jar",
+			"./externals/kotlin-stdlib-1.2.jar");
+	if (!FileExists("./externals/kotlin-stdlib-1.3.jar"))
+		DownloadFile(
+			"https://search.maven.org/remotecontent?filepath=org/jetbrains/kotlin/kotlin-stdlib/1.3.41/kotlin-stdlib-1.3.41.jar",
+			"./externals/kotlin-stdlib-1.3.jar");
+});
+
+Task("libs")
+	.IsDependentOn("externals")
+	.Does(() =>
+{
+	var gradlew = MakeAbsolute((FilePath)"./native/gradlew");
+	var exitCode = StartProcess(gradlew, new ProcessSettings {
+		Arguments = "jar",
+		WorkingDirectory = "./native/"
+	});
+	if (exitCode != 0)
+		throw new Exception($"Gradle exited with code {exitCode}.");
+});
+
+Task("nuget")
+	.IsDependentOn("libs")
+	.Does(() =>
+{
+	NuGetPack("./nuget/Xamarin.Kotlin.BindingSupport.nuspec", new NuGetPackSettings {
+		Version = PACKAGE_VERSION,
+		OutputDirectory = "./output"
+	});
+});
+
+Task("samples")
+	.IsDependentOn("nuget")
+	.Does(() =>
+{
+	var settings = new MSBuildSettings()
+		.SetConfiguration("Release")
+		.SetVerbosity(Verbosity.Minimal)
+		.WithRestore();
+
+	MSBuild("./samples/KotlinBindingSupportSample.sln", settings);
+});
+
+Task("clean")
+	.Does(() =>
+{
+	CleanDirectories("./source/bin");
+	CleanDirectories("./source/obj");
+	CleanDirectories("./output/");
+	CleanDirectories("./native/.gradle");
+	CleanDirectories("./native/**/build");
+});
+
+Task("Default")
+	.IsDependentOn("externals")
+	.IsDependentOn("libs")
+	.IsDependentOn("nuget")
+	.IsDependentOn("samples");
+
+RunTarget(TARGET);

Util/Xamarin.Kotlin.BindingSupport/native/.gitignore

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+.gradle
+build

Util/Xamarin.Kotlin.BindingSupport/native/build.gradle

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+plugins {
+    id 'java'
+    id 'org.jetbrains.kotlin.jvm' version '1.3.41'
+}
+
+group 'xamarin.binding.kotlin'
+version '1.0'
+
+sourceCompatibility = 1.8
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.jetbrains.kotlin:kotlin-stdlib-jdk8'
+    compile 'com.github.ajalt:clikt:2.1.0'
+    compile 'xom:xom:1.3.2'
+    compile 'org.jetbrains.kotlinx:kotlinx-metadata-jvm:0.1.0'
+    compile "org.jetbrains.kotlin:kotlin-stdlib:1.3.41"
+    compile "org.jetbrains.kotlin:kotlin-reflect:1.3.41"
+}
+
+compileKotlin {
+    kotlinOptions.jvmTarget = "1.8"
+}
+
+jar {
+    manifest {
+        attributes 'Main-Class': 'xamarin.binding.kotlin.bindingsupport.ProgramKt',
+                   'Implementation-Version': version
+    }
+    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+}

Util/Xamarin.Kotlin.BindingSupport/native/gradle.properties

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+kotlin.code.style=official

Util/Xamarin.Kotlin.BindingSupport/native/gradle/wrapper/gradle-wrapper.properties

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+#Thu Aug 15 01:51:33 SAST 2019
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.2.1-all.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME