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From "Conor MacNeill" <co...@cortexebusiness.com.au>
Subject Re: basic file dependency
Date Wed, 02 May 2001 13:43:49 GMT
Checkout the uptodate task.

----- Original Message ----- 
From: "Jason Crickmer" <jcrickmer@hire.com>
To: <ant-user@jakarta.apache.org>
Sent: Wednesday, May 02, 2001 11:15 PM
Subject: basic file dependency


> I am new to the list, so please pardon me if this question has been
> asked before...
> 
> We have moved from Make to Ant, but there are some lingering issues
> that I need to try to resolve.  The most important is, how does file
> dependency work?
> 
> Take this Makefile for example:
> 
> .PHONY: mytarget
> 
> CP_XERCES=/opt/ApacheGroup/xerces-1.2.3/xerces.jar
> 
> mytarget: ../rel/etc/product.conf
> 
> ../rel/etc/product.conf: Makefile etc/product.conf
> perl -p -e 's(_CP_XERCES_)(${CP_XERCES});' etc/product.conf > $@
> 
> 
> So, when run, if Makefile OR etc/product.conf is newer than
> ../rel/etc/product.conf, then the Perl command will be run.  If not,
> nothing happens.
> 
> The only way I see to do this in Ant would be to create a new variable
> and some how set it to true or false depending on the file age
> compared to its source.  But, the only thing I have found based on
> modification times is the "copy" task.
> 
> Any assistance is appreciated!
> 
> Thanks,
> Jason
> 


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