echoproperties

Description

Displays all the current properties in the project. The output can be sent to a file if desired. You can also specify a subset of properties to save by naming a prefix: only properties starting with this prefix will be saved. This task can be used as a somewhat contrived means of returning data from an <ant> invocation, but is really for debugging build files.

Parameters

Attribute	Description	Required
destfile	If specified, the value indicates the name of the file to send the output of the statement to. The generated output file is compatible for loading by any Java application as a property file. If not specified, then the output will go to the Ant log.	No
prefix	a prefix which is used to filter the properties only those properties starting with this prefix will be echoed.	No
failonerror	By default, the "failonerror" attribute is enabled. If an error occurs while writing the properties to a file, and this attribute is enabled, then a BuildException will be thrown, causing the build to fail. If disabled, then IO errors will be reported as a log statement, and the build will continue without failure from this task.	No

Examples


  <echoproperties/>

Report the current properties to the log.


  <echoproperties destfile="my.properties"/>

Report the current properties to the file "my.properties", and will fail the build if the file could not be created or written to.


  <echoproperties destfile="my.properties" failonerror="false" />

Report the current properties to the file "my.properties", and will log a message if the file could not be created or written to, but will still allow the build to continue.


  <echoproperties prefix="java."/>

List all properties beginning with "java."