On Wed, 2006-06-07 at 11:17 -0700, Guru Balse wrote:
> I am sure this question has been asked before, and I could not see any
> reasonable answer in the archives. How can I implement a loop in ANT
> without using scripts? For example, if I want to call a certain target
> N times, how can I do it?
>
> Using ant-contrib is OK. Of course, something like <for
> list="1,2,3,4,5,6,...,N"> would work but I want N to be a property that
> can be specified in the command line.
>
> Thanks in advance for your suggestions.
Here is a rather contrived solution using <buildnumber/> for state and
<ant> for recursion. Not sure how much use it will be in real world use,
but it was fun to write :)
<project default="increment" name="Increment Test" basedir=".">
<target name="check.condition" unless="increment.stop">
<ant antfile="build.xml" target="increment" inheritAll="no"/>
</target>
<target name="remove.statefile" if="increment.stop">
<delete file="build.number"/>
</target>
<target name="increment">
<buildnumber/>
<echo>N = ${N} BN=${build.number}</echo>
<condition property="increment.stop">
<equals arg1="${N}" arg2="${build.number}"/>
</condition>
<antcall target="remove.statefile"/>
<antcall target="check.condition"/>
</target>
</project>
ant -f increment.xml -DN=3
Buildfile: increment.xml
increment:
[echo] N = 3 BN=0
remove.statefile:
check.condition:
increment:
[echo] N = 3 BN=1
check.condition:
increment:
[echo] N = 3 BN=2
check.condition:
increment:
[echo] N = 3 BN=3
check.condition:
BUILD SUCCESSFUL
Total time: 1 second
There is a bug - the removal of the "build.number" file only works in
cases where N=0, and I have not yet worked out why. So remove
build.number manually each time if you are playing with this buildfile.
Cheers, Ben
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