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ANT - Property Task
Ant - Property Task
Ant build files are written in XML, which does not allow declaring variables as you do in your favorite programming language. However, as you may have imagined, it would be useful if Ant allowed declaring variables such as project name, project source directory, etc.
Ant uses the property element which allows you to specify the properties. This allows the properties to be changed from one build to another or from one environment to another.
Ant Properties
By default, Ant provides the following pre-defined properties that can be used in the build file −
| Sr.No | Properties & Description |
|---|---|
| 1 | ant.file The full location of the build file. |
| 2 | ant.version The version of the Apache Ant installation. |
| 3 | basedir The basedir of the build, as specified in the basedir attribute of the project element. |
| 4 | ant.java.version The version of the JDK that is used by Ant. |
| 5 | ant.project.name The name of the project, as specified in the name attribute of the project element. |
| 6 | ant.project.default-target The default target of the current project. |
| 7 | ant.project.invoked-targets Comma separated pst of the targets that were invoked in the current project. |
| 8 | ant.core.pb The full location of the Ant jar file. |
| 9 | ant.home The home directory of Ant installation. |
| 10 | ant.pbrary.dir The home directory for Ant pbrary files - typically ANT_HOME/pb folder. |
Ant also makes the system properties (Example: file.separator) available to the build file.
In addition to the above, the user can define additional properties using the property element.
The following example shows how to define a property called sitename −
<?xml version="1.0"?>
<project name="Hello World Project" default="info">
<property name="sitename" value="www.tutorialspoint.com"/>
<target name="info">
<echo>Apache Ant version is ${ant.version} - You are at ${sitename} </echo>
</target>
</project>
Output
Running Ant on the above build file produces the following output −
C:>ant Buildfile: C:uild.xml info: [echo] Apache Ant version is Apache Ant(TM) version 1.10.12 compiled on October 13 2021 - You are at www.tutorialspoint.com BUILD SUCCESSFUL Total time: 0 seconds C:>Advertisements