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From Prashant Reddy <prash...@pramati.com>
Subject Re: How to get the count of the number of lines in a file using ANT
Date Fri, 12 Oct 2007 04:36:36 GMT
Yup, that is a better way of doing it. I should have tested the snippet
before positing. Thanks for sharing the correction.

-Prashant
On Thu, 2007-10-11 at 17:32 -0700, Saladin Sharif wrote:
> >oh you are looking to do something like :  
> >cat log.txt | grep "a string" | wc -l 
> >
> ><loadfile srcfile="${output}" property="contains.errors">
> >        <filterchain>
> >              <linecontains>
> >                  <contains value="${lookingFor}"/>
> >            </linecontains>
> >      </filterchain>
> ></loadfile>
> ><echo file="${basedir}/temp.txt" message="${contains.errors}"/>
> 
> The problem with this code snippet is that if there are no occurances of ${lookingFor}
in the file ${output}, then instead of an empty file being written out to ${basedir}/temp.txt,
instead the literal string "${contains.errors}" gets written out to that file.  That's because
the property contains.errors has not been set.
> 
> An even better approach would be to use the copy command, like so:
> 
> <copy file="${output}" tofile="${basedir}/temp.txt">
>     <filterchain>
>         <linecontains>
>             <contains value="differ}"/>
>         </linecontains>
>     </filterchain>
> </copy>
> 
> This way if there are no occurances of ${lookingFor} in file ${output}, then an empty
file gets written out to ${basedir}/temp.txt
> -Saladin
> 
> 
>  
> **********************************************************
> * Saladin Sharif
> * e-mail: al_zawiah@yahoo.com
> * Visit homepage @ http://gaia.ecs.csus.edu/~sharifs
> **********************************************************
> 
> 
> ----- Original Message ----
> From: Prashant Reddy <prashant@pramati.com>
> To: Saladin Sharif <al_zawia@yahoo.com>; Ant Users List <user@ant.apache.org>
> Sent: Tuesday, October 9, 2007 9:42:40 PM
> Subject: Re: How to get the count of the number of lines in a file using ANT
> 
> On Tue, 2007-10-09 at 12:25 -0700, Saladin Sharif wrote:
> > But what I am really after is being able to set a flag if the file
> > contains one or more lines of text.
> 
> oh you are looking to do something like :  
> cat log.txt | grep "a string" | wc -l 
> 
> <loadfile srcfile="${output}" property="contains.errors">
>         <filterchain>
>               <linecontains>
>                   <contains value="${lookingFor}"/>
>             </linecontains>
>       </filterchain>
> </loadfile>
> <echo file="${basedir}/temp.txt" message="${contains.errors}"/>
> 
> So now you have the lines from the ${output} which contain ${lookingFor}
> in a temp file temp.txt
> 
> After this, you could use the example Matt gave to find out the number
> of lines in temp.txt
> 
> Hope this helps.


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