[JAVA] Launch Gradle from Ant

Gradle isn't particularly troublesome to call from the command line, but when booted from an IDE like Eclipse (for example, Buildship's Eclipse Plug-ins for Gradle), it has the following problems:

――It's very difficult to understand because even tasks that you don't normally need appear in the list. --Two files, gradlew and gradlew.bat, are created at the root of the project.

So, rather, I came up with the idea that Ant, which has the best support in the Java IDE, should be used instead of the task runner. That's why I made the following script.

build.ant

<project name="testapp">

  <target name="jar">
    <gradlew command="jar" />
  </target>

  <macrodef name="gradlew">
    <attribute name="command" />
    <sequential>
      <java classname="org.gradle.wrapper.GradleWrapperMain" fork="true"
        classpath="gradle/wrapper/gradle-wrapper.jar">
        <sysproperty key="org.gradle.appname" value="${basedir}" />
        <arg value="@{command}" />
      </java>
    </sequential>
  </macrodef>
</project>

I don't think I'm overwhelmed, but Ivy has stopped updating, and I don't need any extra startup files, so maybe this is fine ...