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From Miroslav Nachev <>
Subject Re: How to create if condition task from maven
Date Wed, 15 Oct 2008 13:29:16 GMT
How and where to put this taskdef?
Why to use that?


Gilles Scokart wrote:
> Try to add a taskdef.
> 2008/10/15 Miroslav Nachev <>:
>> Hi,
>> I have one ant build file which is called from maven. In that ant file I
>> would like to do something only if some condition is false. In my current
>> case the condition is:
>>   <available file="${mprm.bin.dir}/mprm" property="mprm.file.exists"/>
>>   <echo message="mprm.file.exists=${mprm.file.exists}"/>
>>   <if>
>>       <equals arg1="${mprm.file.exists}" arg2="false"/>
>>       <then>
>>           <get src="${bundlecloud.source.uri}/${}"
>>               dest="${ant.base.dir}/${}"
>>               usetimestamp="true"/>
>>           <unzip src="${ant.base.dir}/${}" dest="${ant.base.dir}"/>
>>           <chmod file="${mprm.bin.dir}/mprm" perm="+x"/>
>>       </then>
>>   </if>
>> The problem is when I try to use "<if>" element:
>> Embedded error: The following error occurred while executing this line:
>> ... Could not create task or type of type: if.
>> Ant could not find the task or a class this task relies upon.
>> This is common and has a number of causes; the usual
>> solutions are to read the manual pages then download and
>> install needed JAR files, or fix the build file:
>> - You have misspelt 'if'.
>>  Fix: check your spelling.
>> - The task needs an external JAR file to execute
>>    and this is not found at the right place in the classpath.
>>  Fix: check the documentation for dependencies.
>>  Fix: declare the task.
>> - The task is an Ant optional task and the JAR file and/or libraries
>>    implementing the functionality were not found at the time you
>>    yourself built your installation of Ant from the Ant sources.
>>  Fix: Look in the ANT_HOME/lib for the 'ant-' JAR corresponding to the
>>    task and make sure it contains more than merely a META-INF/MANIFEST.MF.
>>    If all it contains is the manifest, then rebuild Ant with the needed
>>    libraries present in ${ant.home}/lib/optional/ , or alternatively,
>>    download a pre-built release version from
>> - The build file was written for a later version of Ant
>>  Fix: upgrade to at least the latest release version of Ant
>> - The task is not an Ant core or optional task
>>    and needs to be declared using <taskdef>.
>> - You are attempting to use a task defined using
>>   <presetdef> or <macrodef> but have spelt wrong or not
>>  defined it at the point of use
>> Remember that for JAR files to be visible to Ant tasks implemented
>> in ANT_HOME/lib, the files must be in the same directory or on the
>> classpath
>> Please neither file bug reports on this problem, nor email the
>> Ant mailing lists, until all of these causes have been explored,
>> as this is not an Ant bug.
>> In my pom file (maven) I am included ant-contrib as follow:
>>       <dependencies>
>>           <dependency>
>>               <groupId>ant-contrib</groupId>
>>               <artifactId>ant-contrib</artifactId>
>>               <version>1.0b2</version>
>>           </dependency>
>>       </dependencies>
>> What is wrong and is there another way to do some condition check?
>> Regards,
>> Miro.
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