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From Wascally Wabbit <>
Subject Re: TImestamping in ANT
Date Fri, 20 Jul 2007 02:46:43 GMT

The assign task is already defined for you as part of the
AntXtras antlib. The easiest thing to do is to load the
entire antlib and experiment. *See the Quick Start and
User Guide for additional information*.

Example (assuming at least Ant 1.6.5, and AntXtras bin download
to some local directory '${antextensions.d}/antx'):


   <path id="antx.classpath">
     <fileset dir="${antextensions.d}/antx">
       <include name="lib/*.jar"/>

   <taskdef resource="com/idaremedia/antx/install/antlib.xml"

[In any target or macrodef]
    <assign var="duration" value="now"/>
    <assign var="duration" value="-now" .../>

-The Wabbit

dkhanna01 wrote:
> Hi 
> I downloaded the antxtras unility from the site but the two jar files in
> that does not contain class file for assign task. SO when I try to run my
> script after adding assing task it gave an error that " Problem: failed to
> create task or type assign"
> THanks
> Wascally Wabbit wrote:
>> dkhanna01 wrote:
>>> I need to find out the time taken by each of the process/target in our
>>> build.xml file. Now for doing this I have use ANT tstamp task to
>>> calculate
>>> the start time and end time of the process. Now my question is how do I
>>> find
>>> out the total time taken by the process, I mean is there any way to
>>> calculate difference between "End time" and "Start time" 
>>> Thanks
>> If you can use thirdparty libraries you can use the AntXtra's
>> <assign> task like so:
>> <target name="compile" depends="-init" description="Compile stuff">
>>    <assign var="time" value="now"/>
>>    ...[all your compiling tasks here]
>>    <assign var="time" value="-now" transform="duration"
>>       copyproperty="compile.duration"/>
>>    <echo level="info" message="compile took ${compile.duration}"/>
>> </target>
>> If you want to do this for lots of your targets you can leverage
>> macrodefs to do this for every target using something like:
>> <macrodef name="timedtarget">
>>    <attribute name="name">
>>    <attribute name="functions"/>
>>    <sequential>
>>      <assign var="time_" value="now"/>
>>      <callinline targets="@{functions}"/> <!--do NOT switch projects-->
>>      <assign var="time_" value="-now" transform="duration"
>>         copyproperty="@{name}.duration"/>
>>      <echo level="info" message="@{name} took ${@{name}.duration}"/>
>>    </sequential>
>> </macrodef>
>> Then use it like so:
>> <target name="-compile">
>>     ...[all your compiling work here in private target]
>> </target>
>> <target name="compile" depends="-init" description="Compile stuff">
>>    <timetarget name="compile" functions="-compile"/>
>> </target>
>> AntXtras is at:
>> Hope that helps.
>> -The Wabbit
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