enable PostgreSQL configuration to Wildfly using Gradle.

postgre.gradle

dependencies { runtime 'org.postgresql:postgresql:9.2-1003-jdbc4' }

task installPostgreSQL(type: Copy) {
  def postgreJar = configurations.runtime.find { it.name.contains('postgresql') }
	def moduleDir = "$jbossHome/modules/system/layers/base/org/postgresql/main"

	from postgreJar
	into moduleDir

	doLast {
		file("$moduleDir/module.xml").text = """<?xml version="1.0" encoding="UTF-8"?>
<module xmlns="urn:jboss:module:1.0" name="org.postgresql">
    <resources>
        <resource-root path="${postgreJar.name}"/>
    </resources>
    <dependencies>
        <module name="javax.api"/>
        <module name="javax.transaction.api"/>
    </dependencies>
</module>
"""
	}
}

standalone.xml

<subsystem xmlns="urn:jboss:domain:datasources:2.0">
  		<datasources>
				<datasource jndi-name="java:jboss/datasources/PostgreDS"
					pool-name="PostgreDS" enabled="true" use-java-context="true">
					<connection-url>jdbc:postgresql://localhost:5432/mydb
					</connection-url>
					<driver>postgresql</driver>
					<security>
						<user-name>postgreuser</user-name>
						<password>postgrepass</password>
					</security>
				</datasource>
				<drivers>
					<driver name="postgresql" driver-class-name="org.postgresql.Driver"
						module="org.postgresql">
						<xa-datasource-class>org.postgresql.xa.PGXADataSource
						</xa-datasource-class>
					</driver>
				</drivers>
			</datasources>
		</subsystem>