Write folder name and their sizes in a file using Ant

Question

I need some help with Ant. I want to create a file using Ant, which to contain some names and the size in kb of some folders and also to contain other kind of data(not size) but with the same pattern. Something like this:

build.date=April 01, 2000
folder1=10000
folder2=59093
folder3=646854
folder4=14897123

And also to make the sum of some folder sizes(for example foldersum=folder1+folder2) and write that in the file:

build.date=April 01, 2000
folder1=10000
folder2=59093
folder3=646854
folder4=14897123
foldersum=folder1+folder2

Answer 1

ANT is not a programming language. The best way to do this is to embed a scripting language, for example groovy.

Example

Given the following directory structure

├── build.xml
├── folder1
│   ├── file1.txt
│   ├── file2.txt
│   └── file3.txt
├── folder2
│   ├── file4.txt
│   └── file5.txt
└── folder3
    └── file6.txt

Produces a file called "build-report.txt"

build.date=April 09,2015
folder1=1
folder2=1
folder3=1
foldersum=3

build.xml

<project name="demo" default="build">

  <available classname="org.codehaus.groovy.ant.Groovy" property="groovy.installed"/>

  <target name="build" depends="init">
    <taskdef name="groovy" classname="org.codehaus.groovy.ant.Groovy"/>

    <dirset id="dirs" dir="." includes="folder*"/>

    <groovy>
      import java.text.SimpleDateFormat

      def sdf = new SimpleDateFormat("MMMM dd,yyyy")

      new File("build-report.txt").withWriter { w ->

        w.println "build.date=${sdf.format(new Date())}"

        def total = 0

        ant.project.references.dirs.each {
          def dir = new File(it.toString())
          def size = dir.directorySize()

          w.println "${dir.name}=${size}"

          total += size
        }

        w.println "foldersum=${total}"
      }
    </groovy>
  </target>

  <target name="init" unless="groovy.installed">
    <mkdir dir="${user.home}/.ant/lib"/>
    <get dest="${user.home}/.ant/lib/groovy.jar" src="http://search.maven.org/remotecontent?filepath=org/codehaus/groovy/groovy-all/2.4.3/groovy-all-2.4.3.jar"/>
    <fail message="Groovy installed run build again"/>
  </target>

</project>