Ant save property value to file

We can also use external property file and use it into ANT build file. It allows you to reuse the same build file, with different property settings for different execution environment.

Here we are creating the property file is named build. You could create multiple build properties files based on the deployment environments — such as build. Property 's classpath attribute is a path-like structure and can also be set via a nested classpath element. Note that you can reference a global properties file for all of your Ant builds using the following:.

Where the user. On Unix based systems, this will map to the user's home directory. On modern Windows variants, this will most likely resolve to the user's directory in the Documents and Settings or Users folder. Read the system environment variables and stores them in properties, prefixed with env. Note that this only works on select operating systems.

Two of the values are shown being echoed. This buildfile uses the properties defined in build. Finally all these values could be overwritten by personal settings with a file per user. As stated, this task will load in a properties file stored in the file system, or as a resource on a classpath.

Here are some interesting facts about this feature. I was just digging through some Ant build scripts I've created, and I noticed a segment of a build script that first creates a timestamp, and then uses that timestamp in the process of creating a manifest file.

This build script is used for building a Java Swing application. As you can see, this segment of my Ant build script uses the Ant tstamp task , and then uses a variable named TODAY that is created by this task.

Here's a blurb from the tstamp documentation that describes what it does:. The boolean attribute jdkproperties is provided to recover the previous behaviour of the task, in which the layout and any comments in the properties file were lost by the task. The rules used when setting a property value are shown below. The operation occurs after these rules are considered. The following changes the my. Assume my.