Convert settings and main build to kotlin (#9216)

Author: bric3

build.gradle

@@ -0,0 +1,144 @@
+import com.diffplug.gradle.spotless.SpotlessExtension
+
+plugins {
+  id("datadog.gradle-debug")
+  id("datadog.dependency-locking")
+
+  id("com.diffplug.spotless") version "6.13.0"
+  id("com.github.spotbugs") version "5.0.14"
+  id("de.thetaphi.forbiddenapis") version "3.8"
+
+  id("org.shipkit.shipkit-auto-version") version "2.1.2"
+  id("io.github.gradle-nexus.publish-plugin") version "2.0.0"
+
+  id("com.gradleup.shadow") version "8.3.6" apply false
+  id("me.champeau.jmh") version "0.7.0" apply false
+  id("org.gradle.playframework") version "0.13" apply false
+  id("info.solidsoft.pitest") version "1.9.11" apply false
+}
+
+description = "dd-trace-java"
+
+val isCI = providers.environmentVariable("CI")
+
+apply(from = rootDir.resolve("gradle/repositories.gradle"))
+
+spotless {
+  // only resolve the spotless dependencies once in the build
+  predeclareDeps()
+}
+
+with(extensions["spotlessPredeclare"] as SpotlessExtension) {
+  // these need to align with the types and versions in gradle/spotless.gradle
+  java {
+    removeUnusedImports()
+
+    // This is the last Google Java Format version that supports Java 8
+    googleJavaFormat("1.7")
+  }
+  groovyGradle {
+    greclipse()
+  }
+  groovy {
+    greclipse()
+  }
+  kotlinGradle {
+    ktlint("0.41.0")
+  }
+  kotlin {
+    ktlint("0.41.0")
+  }
+  scala {
+    scalafmt("2.7.5")
+  }
+}
+apply(from = rootDir.resolve("gradle/spotless.gradle"))
+
+val compileTask = tasks.register("compile")
+
+val repoVersion = version
+
+allprojects {
+  group = "com.datadoghq"
+  version = repoVersion
+
+  if (isCI.isPresent) {
+    layout.buildDirectory = providers.provider {
+      val newProjectCIPath = projectDir.path.replace(
+        rootDir.path,
+        ""
+      )
+      rootDir.resolve("workspace/$newProjectCIPath/build/")
+    }
+  }
+
+  apply(from = rootDir.resolve("gradle/dependencies.gradle"))
+  apply(from = rootDir.resolve("gradle/util.gradle"))
+
+  compileTask.configure {
+    dependsOn(tasks.withType<AbstractCompile>())
+  }
+
+  tasks.configureEach {
+    if (this is JavaForkOptions) {
+      maxHeapSize = System.getProperty("datadog.forkedMaxHeapSize")
+      minHeapSize = System.getProperty("datadog.forkedMinHeapSize")
+      jvmArgs(
+        "-XX:ErrorFile=/tmp/hs_err_pid%p.log",
+        "-XX:+HeapDumpOnOutOfMemoryError",
+        "-XX:HeapDumpPath=/tmp"
+      )
+    }
+  }
+}
+
+tasks.register("latestDepTest")
+
+nexusPublishing {
+  repositories {
+    val forceLocal = providers.gradleProperty("forceLocal").getOrElse("false").toBoolean()
+    if (forceLocal && !isCI.isPresent) {
+      // For testing, use with https://hub.docker.com/r/sonatype/nexus
+      // $ docker run --rm -d -p 8081:8081 --name nexus sonatype/nexus:oss
+      // $ ./gradlew publishToLocal -PforceLocal=true
+      // Doesn't work for testing releases though... (due to staging),
+      // however, it's possible to explore http://localhost:8081/nexus/
+      register("local") {
+        nexusUrl = uri("http://localhost:8081/nexus/content/repositories/releases/")
+        snapshotRepositoryUrl = uri("http://localhost:8081/nexus/content/repositories/snapshots/")
+        username = "admin"
+        password = "admin123"
+        allowInsecureProtocol = true
+      }
+    } else {
+      // see https://github.com/gradle-nexus/publish-plugin#publishing-to-maven-central-via-sonatype-central
+      // For official documentation:
+      // staging repo publishing https://central.sonatype.org/publish/publish-portal-ossrh-staging-api/#configuration
+      // snapshot publishing https://central.sonatype.org/publish/publish-portal-snapshots/#publishing-via-other-methods
+      sonatype {
+        nexusUrl = uri("https://ossrh-staging-api.central.sonatype.com/service/local/")
+        snapshotRepositoryUrl = uri("https://central.sonatype.com/repository/maven-snapshots/")
+        username = providers.environmentVariable("MAVEN_CENTRAL_USERNAME")
+        password = providers.environmentVariable("MAVEN_CENTRAL_PASSWORD")
+      }
+    }
+  }
+}
+
+val writeMainVersionFileTask = tasks.register("writeMainVersionFile") {
+  val versionFile = rootProject.layout.buildDirectory.file("main.version")
+  inputs.property("version", project.version)
+  outputs.file(versionFile)
+  doFirst {
+    require(versionFile.get().asFile.parentFile.mkdirs() || versionFile.get().asFile.parentFile.isDirectory)
+    versionFile.get().asFile.writeText(project.version.toString())
+  }
+}
+
+allprojects {
+  tasks.withType<PublishToMavenLocal>().configureEach {
+    finalizedBy(writeMainVersionFileTask)
+  }
+}
+
+apply(from = "$rootDir/gradle/ci_jobs.gradle")