Displays all the current properties (or a subset of them specified by a
<propertyset>) in the project. The output can be sent to a file if
desired. This task can be used as a somewhat contrived means of returning data from an
ant invocation, but is really for debugging build
|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.||No; by default, output to the log|
|prefix||a prefix which is used to filter the properties: only properties whose names start with this prefix will be echoed.||No|
|regex||a regular expression which is used to filter the properties: only those properties whose names match it will be echoed.||No|
|failonerror||If an error occurs while writing the properties to a file, and this attribute is enabled,
||No; default is
xml. Determines the output format.
|No; defaults to
Since Ant 1.6.
You can specify subsets of properties to be echoed
with propertysets. Using
more control on which properties will be picked up. The attributes prefix
and regex are just shortcuts that use
Report the current properties to the log.
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.
List all properties beginning with java.
<echoproperties> <propertyset> <propertyref prefix="java."/> </propertyset> </echoproperties>
This again lists all properties beginning with java. using a
<propertyset/> which is an equivalent but longer way.
Lists all properties that contain ant in their names. The equivalent snippet
<echoproperties> <propertyset> <propertyref regex=".*ant.*"/> </propertyset> </echoproperties>