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To: ant-user@jakarta.apache.org
Subject: Re: [apply] and m4
References: <20010625112234.A3520@learn.ltc.vanderbilt.edu>
From: Stefan Bodewig <bodewig@apache.org>
Date: 26 Jun 2001 08:11:21 +0200
In-Reply-To: Doug Morse's message of "Mon, 25 Jun 2001 11:22:34 -0500"
Message-ID: <m3hex3hit2.fsf@bodewig.bost.de>
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Doug Morse <morse@pobox.com> wrote:

>   <target name="create_triggers">
>     <apply executable="m4" dir="../triggers" dest="../triggers"
>       failonerror="true">
>       <srcfile/>
>       <arg line=" > "/>
>       <targetfile/>
>       <fileset dir="../triggers" includes="*.m4"/>
>       <mapper type="glob" from="*.m4" to="*.sql"/>
>     </apply>
>   </target>
> 
> in an attempt to get Ant to redirect the output to the targetfile,
> but this doesn't work either in that the ">" character just gets
> treated as a filename by m4, as does the targetfile:
> 
>     [apply] /usr/bin/m4: >: No such file or directory [apply]
>     /usr/bin/m4: Users_A_Audit_U01.sql: No such file or directory
> 
> Ant is probably ensuring that the commands it executes do not use
> redirection (as it should, IMHO).

No, Ant doesn't prevent this at all.  If you use > and < on the
command line (at least on Unix) it is the shell that performs the
redirection - m4 won't even see it.

Stefan