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From Matt Benson <gudnabr...@yahoo.com>
Subject RE: for task with inline exec?
Date Mon, 20 Aug 2007 17:25:29 GMT

--- "Ditrick, Gregory" <gregory.ditrick@fmr.com>
wrote:

> Not a bad idea to use <ac:shellscript>, if you are
> not doing cross
> platform stuff.
> The use of a lot of this type of thing,
> <ac:shellscript>, can make the
> ant script platform dependent or you will require
> additional products
> like Cygwin for Windows.
> 
> Using redirectors can make this type of thing
> platform independent.
> But, I've found that you usually have to use
> intermediate flat files to
> re-create all the pipes.  This then has the cost of
> I/O, but gives you
> an the desired platform independent scripts.
> 

I confess myself curious to see a exec/redirector
situation so complex it cannot be solved by nested
filterchains.  I'm sure it's possible to concoct such
a scenario, but most real-world requirements I would
imagine can be done in a single pass.

FWIW,
Matt

> So, you have to weigh the solution with big picture.
>  If you are never
> ever going to another platform like Microsoft then
> definitely use the
> <ac:shellscript> task.  If there is any chance of
> going to Microsoft use
> redirectors and intermediate files.
> 
> Using intermediate files then you use the <exec>
> task with a command in
> a property like ${os.filedump.cmd} and redirectors
> to get your desired
> output.  In a os specific properties file you'll set
> os.filedump.cmd to
> the desired command: i.e. cat for unix, type for
> windows, etc.  A lot
> more work, but will save you a lot of time if you
> have to move your
> script from Unix to Windows.  And then you are not
> dependent on Cygwin
> being installed on the Windows box.
> 
> Again, you must weigh and see the big picture: if
> the ant script will
> never ever be ran on Windows, then use
> <ac:shellscript>.  Or, you'll be
> okay if having Cygwin install on the Windows box is
> not a big burden
> (lots of boxes or don't have admin rights on all
> Windows' boxes).
> 
> My 2 cents on the subject.   
> 
> Keep smiling,
> 
> GregD
> 6-8309
> 
> -----Original Message-----
> From: Vihan Pandey [mailto:vihanpandey@gmail.com] 
> Sent: Monday, August 20, 2007 10:35 AM
> To: Ant Users List
> Subject: Re: for task with inline exec?
> 
> > Why not use shellscript?
> 
> didn't think of it :-)
> 
>
---8-<-------8-<-------8-<-------8-<-------8-<-------8-<-------8-<------
> -8-<----
> 
> <shellscript shell="bash" outputproperty="js.list">
>      cat deploy.properties | grep .js-version| sed
> s/.js-version=v.[0-9]*/,/g | tr -d '\n' | sed
> s/,$//g
> </shellscript>
> 
> <echo>JS list: ${js.list}</echo>
> 
>         <for list="${js.list}" param="myval">
> 
>           <sequential>
> <replace dir="${docroot-re01}"
> token="/javascripts/@{myval}.js"
>
value="http://js.cleartrip.com/javascripts/@{myval}.${@{myval}.js-versio
> n}.js"
> >
> <include name="**/*.html"/>
> <include name="**/*.shtml"/>
> </replace>
>           </sequential>
>         </for>
> 
>
---8-<-------8-<-------8-<-------8-<-------8-<-------8-<-------8-<------
> -8-<----
> 
> Now it works beautifully :-)
> 
> Thanks a million Jan and Peter !!!
> 
> Regards,
> 
> -vihan
> 
>
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