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From veena pandit <v.kri...@gmail.com>
Subject Re: converting ant from a make file
Date Fri, 18 Sep 2009 20:21:16 GMT
I read up about it and I wrote the script.  While testing it I get an error.
Cannot run perl.exe from the directory C:\Perl\bin;

<exec dir="C/Perl/bin  executable="perl.exe">

Thanks in advance,

Veena

On Fri, Sep 18, 2009 at 1:22 PM, Ernst de Haan <ernst@pensioenpage.com>wrote:

> I think by now you should read up on Ant and understand the basic concepts
> before proceeding...
>
> Met een vriendelijke groet,
>
>
> Ernst de Haan
> PensioenPage B.V.
> www.pensioenpage.com
>
> tel. (026) 364 56 34
>
> Op 18 sep 2009 om 18:53 heeft veena pandit <v.kris21@gmail.com> het
> volgende geschreven:\
>
>
> So how would I write it in the build.xml
>>
>> for c in A B C D E; do
>>     perl  -ibak process.pl abc.txt
>>     perl -ibak process.pl def.txt
>>     perl -ibak proces.pl xyz.txt
>>     - mkdir Backup
>>    mv *bak Backup
>>
>> Not clear what this is doing; but it is executing the same pl file against
>> different input files.
>>
>> Sorry, but I don't quite get it yet.
>>
>> Thanks,
>>
>> Veena
>>
>> On Fri, Sep 18, 2009 at 12:41 PM, Ernst de Haan <ernst@pensioenpage.com
>> >wrote:
>>
>> 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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>>>>>
>>>>>
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>>>
>>>
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