Bump Kotlin to 2.2.21 and clean up build scripts (#149)

- Updates Kotlin to 2.2.20-RC2.
- Updates Dokka to 2.1.0-Beta.
- Replaces Nexus Publish plugin with Vanniktech's plugin.  
- Simplifies the JaCoCo configuration.
- Updates the Reckon plugin to 1.0.0 and enables Gradle's configuration cache.

Closes: #148
Closes: #113

---------

Co-authored-by: Peter Trifanov <[email protected]>

Author: lppedd

.github/workflows/release.yml

@@ -4,11 +4,14 @@ on:
   push:
     tags:
       - 'v*'
+
 env:
-  GPG_SEC: ${{ secrets.PGP_SEC }}
-  GPG_PASSWORD: ${{ secrets.PGP_PASSWORD }}
-  OSSRH_USERNAME: ${{ secrets.SONATYPE_USER }}
-  OSSRH_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+  # See https://vanniktech.github.io/gradle-maven-publish-plugin/central for the list of required properties
+  ORG_GRADLE_PROJECT_signingInMemoryKeyId: ${{ vars.PGP_KEY_ID }}
+  ORG_GRADLE_PROJECT_signingInMemoryKey: ${{ secrets.PGP_SEC }}
+  ORG_GRADLE_PROJECT_signingInMemoryKeyPassword: ${{ secrets.PGP_PASSWORD }}
+  ORG_GRADLE_PROJECT_mavenCentralUsername: ${{ secrets.CENTRAL_PORTAL_USER }}
+  ORG_GRADLE_PROJECT_mavenCentralPassword: ${{ secrets.CENTRAL_PORTAL_PASSWORD }}
 
 jobs:
   release:
@@ -35,4 +38,4 @@ jobs:
         with:
           gradle-version: wrapper
           cache-encryption-key: ${{ secrets.GRADLE_ENCRYPTION_KEY }}
-      - run: ./gradlew publishToSonatype closeSonatypeStagingRepository
+      - run: ./gradlew publishToMavenCentral

README.md

@@ -5,7 +5,7 @@
 [![License](https://img.shields.io/github/license/petertrr/kotlin-multiplatform-diff)](https://github.com/petertrr/kotlin-multiplatform-diff/blob/main/LICENSE)
 [![Maven Central](https://img.shields.io/maven-central/v/io.github.petertrr/kotlin-multiplatform-diff)](https://mvnrepository.com/artifact/io.github.petertrr)
 [![Awesome Kotlin Badge](https://kotlin.link/awesome-kotlin.svg)](https://github.com/KotlinBy/awesome-kotlin)
-[![Kotlin](https://img.shields.io/badge/kotlin-2.1.20-blue.svg?logo=kotlin)](http://kotlinlang.org)
+[![Kotlin](https://img.shields.io/badge/kotlin-2.2.21-blue.svg?logo=kotlin)](http://kotlinlang.org)
 
 This is a port of [java-diff-utils](https://github.com/java-diff-utils/java-diff-utils) to Kotlin with multiplatform support.  
 All credit for the implementation goes to the original authors.

build.gradle.kts

@@ -1,14 +1,14 @@
-import io.github.petertrr.configurePublishing
-import io.github.petertrr.ext.booleanProperty
 import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
 import org.jetbrains.kotlin.gradle.dsl.JvmTarget
 import org.jetbrains.kotlin.gradle.dsl.KotlinVersion
 import org.jetbrains.kotlin.gradle.targets.js.testing.KotlinJsTest
 
 plugins {
-    kotlin("multiplatform")
+    alias(libs.plugins.kotlinMultiplatform)
+    alias(libs.plugins.dokka)
     alias(libs.plugins.detekt)
-    id("jacoco-convention")
+    alias(libs.plugins.vanniktech)
+    jacoco
 }
 
 group = "io.github.petertrr"
@@ -20,10 +20,9 @@ dependencies {
 
 kotlin {
     explicitApi()
-
     compilerOptions {
-        apiVersion = KotlinVersion.KOTLIN_2_1
-        languageVersion = KotlinVersion.KOTLIN_2_1
+        apiVersion = KotlinVersion.KOTLIN_2_2
+        languageVersion = KotlinVersion.KOTLIN_2_2
     }
 
     jvm {
@@ -117,16 +116,91 @@ kotlin {
     }
 }
 
-configurePublishing()
+mavenPublishing {
+    coordinates(
+        groupId = project.group.toString(),
+        artifactId = project.name,
+        version = project.version.toString(),
+    )
+
+    // Publishing to Maven Central requires the following Gradle properties:
+    //   mavenCentralUsername=central_username
+    //   mavenCentralPassword=central_password
+    publishToMavenCentral()
+
+    // Signing is enabled only if the key is actually provided.
+    // We do not want missing signing info to block publication to local.
+    val signingKey = project.providers.gradleProperty("signingInMemoryKey")
+
+    if (signingKey.isPresent) {
+        // Signing requires the following Gradle properties:
+        //   signingInMemoryKeyId=pgp_key_id
+        //   signingInMemoryKey=pgp_key
+        //   signingInMemoryKeyPassword=pgp_key_password
+        signAllPublications()
+    }
+
+    pom {
+        name.set(project.name)
+        description.set(project.description)
+        url.set("https://github.com/petertrr/kotlin-multiplatform-diff")
+
+        licenses {
+            license {
+                name.set("The Apache Software License, Version 2.0")
+                url.set("http://www.apache.org/licenses/LICENSE-2.0.txt")
+                distribution.set("repo")
+            }
+        }
+
+        developers {
+            developer {
+                id.set("petertrr")
+                name.set("Petr Trifanov")
+                email.set("[email protected]")
+            }
+        }
+
+        scm {
+            url.set("https://github.com/petertrr/kotlin-multiplatform-diff")
+            connection.set("scm:git:git://github.com/petertrr/kotlin-multiplatform-diff.git")
+        }
+    }
+}
+
+jacoco {
+    toolVersion = "0.8.13"
+}
 
 detekt {
     buildUponDefaultConfig = true
     config.setFrom(files("detekt.yml"))
-    autoCorrect = booleanProperty("detektAutoCorrect", default = true)
+    autoCorrect = project.providers.gradleProperty("detektAutoCorrect").map(String::toBoolean).getOrElse(true)
 }
 
 tasks {
     check {
         dependsOn(detekt)
     }
+
+    val jvmTest = named<Test>("jvmTest")
+    val jacocoReport = register<JacocoReport>("jacocoTestReport") {
+        dependsOn(jvmTest)
+
+        val commonMainSources = kotlin.sourceSets["commonMain"].kotlin.sourceDirectories
+        val jvmMainSources = kotlin.sourceSets["jvmMain"].kotlin.sourceDirectories
+
+        sourceDirectories.setFrom(files(commonMainSources, jvmMainSources))
+        classDirectories.setFrom(layout.buildDirectory.file("classes/kotlin/jvm/main"))
+        executionData.setFrom(layout.buildDirectory.files("jacoco/jvmTest.exec"))
+
+        reports {
+            xml.required = true
+            html.required = true
+        }
+    }
+
+    jvmTest.configure {
+        finalizedBy(jacocoReport)
+    }
 }

buildSrc/build.gradle.kts

@@ -1,10 +1,10 @@
 #########################
 # Gradle settings
 #########################
-org.gradle.jvmargs = -Xmx2g -XX:MaxMetaspaceSize=512m -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
+org.gradle.jvmargs = -Xmx4g -XX:MaxMetaspaceSize=1g -XX:+HeapDumpOnOutOfMemoryError -Dfile.encoding=UTF-8
 org.gradle.parallel = true
 org.gradle.caching = true
-org.gradle.configuration-cache = false
+org.gradle.configuration-cache = true
 
 #########################
 # Kotlin settings

buildSrc/settings.gradle.kts

@@ -1,16 +1,14 @@
 [versions]
-kotlin = "2.1.20"
+kotlin = "2.2.21"
 detekt = "1.23.8"
-dokka = "1.9.20"
-nexus = "2.0.0"
+dokka = "2.1.0"
+vanniktech = "0.34.0"
 
 [plugins]
+kotlinMultiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
+dokka = { id = "org.jetbrains.dokka", version.ref = "dokka" }
 detekt = { id = "io.gitlab.arturbosch.detekt", version.ref = "detekt" }
+vanniktech = { id = "com.vanniktech.maven.publish", version.ref = "vanniktech" }
 
 [libraries]
 detekt-formatting = { group = "io.gitlab.arturbosch.detekt", name = "detekt-formatting", version.ref = "detekt" }
-
-# Gradle plugins
-kotlin-plugin = { group = "org.jetbrains.kotlin", name = "kotlin-gradle-plugin", version.ref = "kotlin" }
-dokka-plugin = { group = "org.jetbrains.dokka", name = "dokka-gradle-plugin", version.ref = "dokka" }
-nexus-plugin = { group = "io.github.gradle-nexus", name = "publish-plugin", version.ref = "nexus" }