vaadin-framework/ivy-taskdefs.xml

<ivy-module version="2.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:noNamespaceSchemaLocation="http://ant.apache.org/ivy/schemas/ivy.xsd">

    <info organisation="com.vaadin" module="vaadin" />
    <configurations>
        <conf name="taskdefs" description="Ant task definitions"
            visibility="private" />
    </configurations>
    <publications />
    <dependencies>
        <!-- Ant tasks -->
        <dependency org="ant-contrib" name="ant-contrib" rev="1.0b3"
            conf="taskdefs ->master" />
        <dependency org="org.apache.maven" name="maven-ant-tasks"
            rev="2.0.10" conf="taskdefs ->master" />
        <dependency org="com.googlecode.jarjar" name="jarjar"
            rev="1.3" conf="taskdefs ->master" />
        <dependency org="com.puppycrawl.tools" name="checkstyle"
            rev="5.6" />
    </dependencies>

</ivy-module>