Use custom gradle to cross-compile

Author: sinwe

build.gradle

@@ -6,41 +6,31 @@ apply plugin: "com.github.maiflai.scalatest"
 apply plugin: 'signing'
 apply plugin: 'maven'
 apply plugin: 'org.scoverage'
-apply plugin: 'net.researchgate.release'
 apply plugin: 'io.codearte.nexus-staging'
 apply plugin: 'org.owasp.dependencycheck'
-apply plugin: "com.adtran.scala-multiversion-plugin"
 apply plugin: 'com.github.ben-manes.versions'
 
 repositories {
     mavenCentral()
 }
 
-ext {
-    reactorVersion = "3.1.3.RELEASE"
-    scoverageVersion = "1.3.0"
-    mockitoVersion = "2.13.0"
-}
-
 dependencies {
-// scala dependencies
-    compile "org.scala-lang:scala-library:%scala-version%"
-// reactor dependencies
-    compile group: 'io.projectreactor', name: 'reactor-core', version: "$reactorVersion"
-// jsr305
-    compile group: 'com.google.code.findbugs', name: 'jsr305', version: '3.0.2'
+    compile libraries.scalaLibrary
+    compile libraries.reactorCore
+    compile libraries.findbugs
 
 //    test dependencies
-    testCompile "org.scalatest:scalatest_%%:3.0.3"
-    testRuntime "org.pegdown:pegdown:1.6.0"
-    testCompile group: 'io.projectreactor', name: 'reactor-test', version: "$reactorVersion"
-    testCompile "org.mockito:mockito-inline:$mockitoVersion"
-    testCompile "com.typesafe.scala-logging:scala-logging_%%:3.7.2"
+    testCompile libraries.scalatest
+    testRuntime libraries.pegdown
+    testCompile libraries.reactorTest
+    testCompile libraries.mockitoInline
+    testCompile libraries.scalaLogging
 
-    scoverage "org.scoverage:scalac-scoverage-plugin_%%:$scoverageVersion", "org.scoverage:scalac-scoverage-runtime_%%:$scoverageVersion"
+    scoverage libraries.scoveragePlugin, libraries.scoverageRuntime
 }
 
 buildscript {
+    apply from: file('versions.gradle')
     repositories {
         maven {
             url "https://plugins.gradle.org/m2/"
@@ -61,7 +51,45 @@ buildscript {
 }
 
 dependencyCheck {
-    skipConfigurations=["apiElements", "implementation", "runtimeElements", "runtimeOnly", "testImplementation", "testRuntimeOnly", "scoverageImplementation", "scoverageRuntimeOnly"]
+    skipConfigurations = ["apiElements", "implementation", "runtimeElements", "runtimeOnly", "testImplementation", "testRuntimeOnly", "scoverageImplementation", "scoverageRuntimeOnly"]
+}
+
+if (!project.parent) {
+    apply plugin: 'net.researchgate.release'
+    final svs = ['2.12.4', '2.11.8']
+
+    for (sv in svs) {
+        String scalaVersionInDot = sv.replaceAll("_", ".")
+
+        tasks.create(name: "build_$sv", type: GradleBuild) {
+            buildFile = './build.gradle'
+            tasks = ['build']
+            startParameter.projectProperties = [scalaVersion: "${scalaVersionInDot}"]
+        }
+
+        tasks.create(name: "uploadArchives_${sv}", type: GradleBuild) {
+            buildFile = './build.gradle'
+            tasks = ['uploadArchives']
+            startParameter.projectProperties = [scalaVersion: "${scalaVersionInDot}"]
+        }
+    }
+
+    tasks.create(name: "buildAll", dependsOn: svs.collect{"build_${it}"}) {}
+
+    tasks.create(name: "uploadArchivesAll", dependsOn: svs.collect{"uploadArchives_${it}"}) {}
+
+    project.task("releaseAll", description: 'Verify project, release and update version to next.', group: "Release", type: GradleBuild) {
+        startParameter = project.getGradle().startParameter.newInstance()
+        tasks = [
+                'createScmAdapter', 'checkCommitNeeded', 'checkUpdateNeeded', 'unSnapshotVersion',
+                'confirmReleaseVersion', 'checkSnapshotDependencies', 'buildAll',
+                'preTagCommit', 'createReleaseTag', 'updateVersion', 'commitNewVersion'
+        ]
+    }
+
+    project.createReleaseTag.dependsOn {
+        project.uploadArchivesAll
+    }
 }
 
 ext.isReleaseVersion = !version.endsWith("SNAPSHOT")
@@ -140,7 +168,7 @@ ScalaCompileOptions.metaClass.fork = true
 ScalaCompileOptions.metaClass.useAnt = false
 ScalaCompileOptions.metaClass.useCompileDaemon = false
 
-project.tasks.scaladoc.scalaDocOptions.additionalParameters=["-no-link-warnings"]
+project.tasks.scaladoc.scalaDocOptions.additionalParameters = ["-no-link-warnings"]
 
 release {
     git {

gradle.properties

@@ -1,2 +1 @@
 version=0.3.5-SNAPSHOT
-scalaVersions=2.12.4,2.11.11

versions.gradle

@@ -0,0 +1,37 @@
+ext.defaultScala_2_11_Version = '2.11.12'
+ext.defaultScala_2_12_Version = '2.12.4'
+
+if (!hasProperty('scalaVersion')) {
+    ext.scalaVersion = ext.defaultScala_2_12_Version
+}
+
+if (scalaVersion.startsWith('2.11')) {
+    ext.baseScalaVersion = '2.11'
+} else if (scalaVersion.startsWith('2.12')) {
+    ext.baseScalaVersion = '2.12'
+} else {
+    ext.baseScalaVersion = scalaVersion
+}
+
+ext {
+    findBugsVersion     = "3.0.2"
+    mockitoVersion      = "2.13.0"
+    pegdownVersion      = "1.6.0"
+    reactorVersion      = "3.1.3.RELEASE"
+    scalaLoggingVersion = "3.7.2"
+    scalatestVersion    = "3.0.3"
+    scoverageVersion    = "1.3.0"
+}
+
+ext.libraries = [
+        findbugs            : "com.google.code.findbugs:jsr305:$findBugsVersion",
+        mockitoInline       : "org.mockito:mockito-inline:$mockitoVersion",
+        pegdown             : "org.pegdown:pegdown:$pegdownVersion",
+        reactorCore         : "io.projectreactor:reactor-core:$reactorVersion",
+        reactorTest         : "io.projectreactor:reactor-test:$reactorVersion",
+        scalaLibrary        : "org.scala-lang:scala-library:$scalaVersion",
+        scalaLogging        : "com.typesafe.scala-logging:scala-logging_$baseScalaVersion:$scalaLoggingVersion",
+        scalatest           : "org.scalatest:scalatest_$baseScalaVersion:$scalatestVersion",
+        scoveragePlugin     : "org.scoverage:scalac-scoverage-plugin_$baseScalaVersion:$scoverageVersion",
+        scoverageRuntime    : "org.scoverage:scalac-scoverage-runtime_$baseScalaVersion:$scoverageVersion"
+]