add maven publish configuration for gradle plugin

lionweb-gen-gradle/build.gradle

@@ -61,4 +61,70 @@ java {
     registerFeature('cli') {
         usingSourceSet(sourceSets.main)
     }
+}
+
+publishing {
+
+    repositories {
+        maven {
+            def releaseRepo = "https://oss.sonatype.org/service/local/staging/deploy/maven2/"
+            def snapshotRepo = "https://oss.sonatype.org/content/repositories/snapshots/"
+            url = isReleaseVersion ? releaseRepo : snapshotRepo
+            credentials {
+                username = project.hasProperty('ossrhUsername') ? ossrhUsername : "Unknown user"
+                password = project.hasProperty('ossrhPassword') ? ossrhPassword : "Unknown password"
+            }
+        }
+    }
+
+//    publications {
+//        kolasu_lionweb(MavenPublication) {
+//            from components.java
+//            artifactId "kolasu-" + project.name
+//            artifact sourcesJar
+//            artifact javadocJar
+//            suppressPomMetadataWarningsFor('cliApiElements')
+//            suppressPomMetadataWarningsFor('cliRuntimeElements')
+//            pom {
+//                name = "kolasu-" + project.name
+//                description = "Gradle plugin for the integration of Kolasu with LIonWeb"
+//                version = project.version
+//                packaging = 'jar'
+//                url = 'https://github.com/Strumenta/kolasu'
+//
+//                scm {
+//                    connection = 'scm:git:https://github.com/Strumenta/kolasu.git'
+//                    developerConnection = 'scm:git:[email protected]:Strumenta/kolasu.git'
+//                    url = 'https://github.com/Strumenta/kolasu.git'
+//                }
+//
+//                licenses {
+//                    license {
+//                        name = 'Apache Licenve V2.0'
+//                        url = 'https://www.apache.org/licenses/LICENSE-2.0'
+//                        distribution = 'repo'
+//                    }
+//                }
+//
+//                developers {
+//                    developer {
+//                        id = 'ftomassetti'
+//                        name = 'Federico Tomassetti'
+//                        email = '[email protected]'
+//                    }
+//                    developer {
+//                        id = 'alessiostalla'
+//                        name = 'Alessio Stalla'
+//                        email = '[email protected]'
+//                    }
+//                    developer {
+//                        id = 'lorenzoaddazi'
+//                        name = 'Lorenzo Addazi'
+//                        email = '[email protected]'
+//                    }
+//                }
+//
+//            }
+//        }
+//    }
 }