Ant Project containing multiple folders to build

Question

I am trying to implement below hierarchy in Ant:

ParentProject

build.xml
RuntimeFolder_1
    build.xml
RuntimeFolder_2
    build.xml
RuntimeFolder_n
    build.xml

Here, When I build ParentFolder build.xml, it should iterate all child folders and build them. A user can add any number of run time folders. Also, I should able to build RuntimeFolder_1...RuntimeFolder_n individually. Does someone know how I can do this?

Answer 1

I know the OP requested Ant but he has expressed an interest in a Gradle solution which might look like

build.gradle
settings.gradle
project1/
    build.gradle
project2/
    build.gradle
project3/
    build.gradle

Your settings.gradle might look like

rootDir.listFiles().each {
    if (new File(it, 'build.gradle').exists()) {
        include ":$it.name"
    }
}

You'd then apply the java plugin to each subproject. This could be done programmatically in the root build.gradle

subprojects {
    apply plugin: 'java'
}

Or in each of the subproject\\build.gradle

apply plugin: 'java'

For further reading see multi project builds and the java plugin

Answer 2

For this, we can use subant: http://ant.apache.org/manual/Tasks/subant.html

Below is the example:

Parent build.xml will contain:

<macrodef name="iterate">
    <attribute name="target"/>
    <sequential>
        <subant target="@{target}">
            <fileset dir="modules" includes="*/build.xml"/>
        </subant>
    </sequential>
</macrodef>
<target name="compile">
    <iterate target="compile"/>
</target>

Inside folder build.xml will contain those targets.