Adding picocli-core-module

Addong a JMPS 9 compliant (hopefully) subproject. This subproject needs the root project to work as source files are copied to this subproject before compilation.

It assumes that tests are run from the root project and not against this subproject, the objective being only to release a compliant Java 9 JPMS module.

Author: Warkdev

picocli-core-module/build.gradle

@@ -0,0 +1,48 @@
+plugins {
+    id 'java'
+    id 'distribution'
+    id 'maven-publish'
+    id 'com.jfrog.bintray'
+    id 'java-library'
+}
+
+group 'info.picocli'
+description 'Picocli JPMS module.'
+version "$projectVersion"
+ext.moduleName = 'info.picocli'
+sourceCompatibility = JavaVersion.VERSION_1_9
+targetCompatibility = JavaVersion.VERSION_1_9
+
+task copyRootProjectCode(type: Copy) {    
+    from("${rootProject.projectDir}/src/main/java"){
+        exclude '**/groovy'
+    }
+    into "${projectDir}/src/main/java"
+}
+
+compileJava {
+    inputs.property("moduleName", moduleName)   
+    doFirst {
+        options.compilerArgs = [
+            '--module-path', classpath.asPath,
+        ]
+        classpath = files()
+    }
+}
+
+test {
+    // Excluding unit tests, should have been generated already with the root project.
+    exclude 'picocli'
+}
+
+task fatJar(type: Jar) {
+    manifest {
+        attributes 'Implementation-Title': 'Gradle Jar File Example',
+        	'Implementation-Version': version
+    }
+    baseName = project.name + '-all'
+    from { configurations.compile.collect { it.isDirectory() ? it : zipTree(it) } }
+    with jar
+}
+
+compileJava.dependsOn(copyRootProjectCode)

picocli-core-module/src/main/java/module-info.java

@@ -0,0 +1,19 @@
+/*
+   Copyright 2017 Remko Popma
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+ */
+
+module info.picocli {     
+    exports picocli;
+}

settings.gradle

@@ -3,6 +3,7 @@ include 'picocli-examples'
 include 'picocli-shell-jline2'
 include 'picocli-shell-jline3'
 include 'picocli-codegen'
+include 'picocli-core-module'
 
 if (org.gradle.api.JavaVersion.current().isJava8Compatible() && !org.gradle.api.JavaVersion.current().isJava9Compatible()) {
     include 'picocli-annotation-processing-tests'