ant can read command line arguments easily to pass data to its tasks.

commnd line arguments options

ant [options] [target [target2 [target3] ...]]
options:
   -help,          -h              print this message and exit
   -projecthelp,   -p              print project help information and exit
   -version                        print the version information and exit
   -diagnostics                    print information that might be helpful to diagnose or report problems and exit
   -quiet,         -q              be extra quiet
   -silent,        -s              print nothing but task outputs and build failures
   -verbose,       -v              be extra verbose
   -debug,         -d              print debugging information
   -emacs,         -e              produce logging information without adornments
   -lib          <path>            specifies a path to search for jars and classes
   -logfile      <file>            use given file for log
   -l            <file>                      ''
   -logger       <classname>       the class which is to perform logging
   -listener     <classname>       add an instance of class as a project listener
   -noinput                              do not allow interactive input
   -buildfile    <file>            use given buildfile
   -file         <file>                      ''
   -f            <file>                      ''
   -d            <property>=<value>   use value for given property
   -keep-going,    -k              execute all targets that do not depend on failed target(s)
   -propertyfile <name>            load all properties from file with -d properties taking precedence
   -inputhandler <class>           the class which will handle input requests
   -find         <file>            (s)earch for buildfile towards the root of
   -s            <file>            the filesystem and use it
   -nice         number            a niceness value for the main thread:1 (lowest) to 10 (highest); 5  is the default
   -nouserlib                      run ant without using the jar files from ${user.home}/.ant/lib
   -noclasspath                    run ant without using classpath
   -autoproxy                      java 5+ : use the os proxies
   -main         <class>           override ant's normal entry point

we'll be using -dproperty to pass varibles to the build task.

example

create a src folder with text1.txt file with following contents −

this is a sample text written in 2025.

create build.xml with the following content −

<?xml version="1.0"?>
<project name="sample" basedir="." default="copy">
   <target name="copy">
      <copy todir="${dest.dir}" filtering="true">
		<fileset dir="${src.dir}"/>
      </copy>
   </target>
</project>

output

here we're using src.dir and dest.dir properties without defining them. we'll pass them using command line arguments. running ant on the above build file produces the following output −

f:\tutorialspoint\ant>ant -dsrc.dir=src -ddest.dir=build
buildfile: f:\tutorialspoint\ant\build.xml

copy:
   [copy] copying 1 file to f:\tutorialspoint\ant\build
build successful
total time: 0 seconds

f:\tutorialspoint\ant>

verify the content of copied file to build folder.

this is a sample text written in 2025.

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