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From Ernst de Haan <er...@pensioenpage.com>
Subject Re: converting ant from a make file
Date Fri, 18 Sep 2009 16:41:56 GMT
The Ant way to process multiple Perl files would be:

    <perl dir="src/perl" todir="build" includes="*.pl" />

See? It's a different way of thinking...

Met een vriendelijke groet,


Ernst de Haan
PensioenPage B.V.
www.pensioenpage.com

tel. (026) 364 56 34

Op 18 sep 2009 om 17:12 heeft veena pandit <v.kris21@gmail.com> het  
volgende geschreven:\

> Do you mind posting a small example of the exec command with the  
> script:
> for c in A B C D E; do?
>
> Thanks,
>
> Veena
>
> On Fri, Sep 18, 2009 at 10:38 AM, John Shott <shott@stanford.edu>  
> wrote:
>
>> Veena:
>>
>> for c in A B C D E; do
>>>     perl ...
>>>    perl ...
>>>    perl...
>>>    - mkdir Backup
>>>     mv *bak Backup
>>>
>>> How do I move this script over to ant build.xml.
>>>
>>>
>> This is probably a bit hard to answer.  In principle, you can  
>> simply call
>> the existing script using something like the exec task along with
>> appropriate arg values.  Or, you can consider breaking the script  
>> apart and
>> call individual perl scripts with appropriate arguments.  In general,
>> however, I think that you'll be happier if you are able to use the  
>> built-in
>> ant tasks wherever possible and resort to things like the exec task  
>> only
>> when you absolutely need to.
>>
>> While I'm not a great authority on either make or ant, I did spend  
>> a great
>> deal of time converting a good sized project with a bunch of  
>> Makefiles to an
>> ant-based build.  My experience is that if you try to simply do a
>> line-by-line conversion of your Makefiles into the ant equivalent,  
>> that you
>> will not be terribly happy with the result.  Why?  Ant is not make  
>> and they
>> approach things differently.
>>
>> I suspect that you'll be a lot happier with the result if you look
>> carefully at what Make is doing, make sure that you understand that  
>> fully,
>> and then look at ant to see how some of it's tasks can be harnessed  
>> to do
>> the same thing.  For example, make tends to do things on a  
>> directory by
>> directory basis whereas ant has a much more sophisticated (to me at  
>> least)
>> means of specifying filesets that become the target of a task.   
>> Also, ant
>> now has a wide range of tasks that perform interesting and often  
>> complex
>> elements of a build in a single step.  You may even find it  
>> desirable (if
>> you have that flexibility) to restructure your source tree in a  
>> more "ant
>> friendly" structure.  You may also find that some of the things  
>> that your
>> Perl scripts are doing are conveniently doable by ant tasks so that  
>> when
>> everything is done, instead of having a handful of Makefiles plus  
>> Perl
>> scripts that you may have a single build.xml file.  Of course, not  
>> knowing
>> what your Perl scripts are doing .... they may be doing things that  
>> would be
>> hard to do in ant.
>>
>> I hope that helps,
>>
>> John
>>
>>
>>
>>
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