build-common.gradle

// use -DEBUG CLI arguement for a debug session
tasks.withType(JavaExec) {
    jvmArgs "-Xms2G", "-Xmx4G"
    if (System.getProperty("EBUG") != null)
        jvmArgs "-agentlib:jdwp=transport=dt_socket,address=localhost:5005,server=y,suspend=y"
}

// use -Dwarn[=[none|all|unchecked|rawtypes|deprecation]] CLI arguement for verbose compiler warnings
tasks.withType(JavaCompile) {
    if (System.getProperty("warn") != null) {
        if (System.getProperty("warn").toLowerCase() == "none")        options.compilerArgs << "-Xlint:none"
        if (System.getProperty("warn").toLowerCase() == "all")         options.compilerArgs << "-Xlint:all"
        if (System.getProperty("warn").toLowerCase() == "unchecked")   options.compilerArgs << "-Xlint:unchecked"
        if (System.getProperty("warn").toLowerCase() == "rawtypes")    options.compilerArgs << "-Xlint:rawtypes"
        if (System.getProperty("warn").toLowerCase() == "deprecation") options.compilerArgs << "-Xlint:deprecation"
        if (System.getProperty("warn") == "") options.compilerArgs << "-Xlint:unchecked" << "-Xlint:rawtypes" << "-Xlint:deprecation"
    }
}

// log project header during certain tasks
def dumpProjectInfo = {
    def name = "Project      : ${project.name}"
    def ver  = "Version      : ${project.version}"
    def ts   = "Started at   : ${java.time.OffsetDateTime.now().toString()}"
    def sep  = new String(new char[10 + ts.length()]).replace('\0', '~')
    logger.lifecycle "-=[ ${sep} ]=-"
    logger.lifecycle "-=[     ${name}${(new String(new char[7 + ts.length() - name.length()]).replace('\0', ' '))}]=-"
    logger.lifecycle "-=[     ${ver}${(new String(new char[7 + ts.length() - ver.length()]).replace('\0', ' '))}]=-"
    logger.lifecycle "-=[     ${ts}${(new String(new char[7]).replace('\0', ' '))}]=-"
    logger.lifecycle "-=[ ${sep} ]=-\n"
}
project.gradle.taskGraph.whenReady{dumpProjectInfo.call()}