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Message-Id: <4.3.1.2.20000526172030.0433b840@cic-mail.lanl.gov>
Date: Fri, 26 May 2000 17:21:28 -0600
To: ant-dev@jakarta.apache.org
From: David Forslund <dwf@lanl.gov>
Subject: Re: [PATCH] exec with include/exclude
In-Reply-To: <Pine.LNX.4.21.0005261027350.7333-200000@marni.otago.ac.nz>
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I tried the patch and find the jidl program opens up a bunch of command 
windows on NT
and although jidl appears to process the idl files, nothing is written to disk.

Dave
At 10:43 AM 5/26/00 +1200, you wrote:

>I wrote a trivial extension to the existing Exec task definition to make
>it include/exclude aware and I have already posted it here, but
>without any (positive or negative) feedback.
>
>With the patch, the Exec task will behave as usual if used as
>usual. However, if used with the additional optional attribute 'src' which
>should be a directory, it will search for files, and will exec a command
>with attached list of files as an additional last argument.
>'src' attribute can be renamed to 'dir' or whatever will be the 'standard
>look&feel' for matching tasks.
>
>One can use the modified Exec for any task which requires executing a
>binary program with a list of files being its arguments;
>for example to compile multiple *.idl files:
>
>(*) <exec dir="${basedir}"
>       command="jidl --output-dir ${src.dir} --package com.my.idl"
>       src="src/idls" output="out.txt"/>
>
>if inside ${basedir}/src/idls we have files: a.idl, b.idl, c.txt
>it would execute effectively:
>
>cd ${basedir}; jidl --output-dir src/main --package com.my.idl \
>${basedir}/src/idl/a.idl ${basedir}/src/idl/b.idl ${basedir}/src/idl/c.txt
>
>
>(*) <exec dir="${basedir}"
>       command="jidl --output-dir ${src.dir} --package com.my.idl"
>       src="src/idl" output="out.txt">
>       <include name="*.idl"/>
>     </exec>
>
>if inside ${basedir}/src/idls we have files: a.idl, b.idl, c.txt
>it would execute effectively:
>
>cd ${basedir}; jidl --output-dir src/main --package com.my.idl \
>${basedir}/src/idl/a.idl ${basedir}/src/idl/b.idl
>
>
>The patch assumes that the command should be invoked once with the list of
>all matching files appended to the list of arguments. I cannot find any
>use of executing commands in list of files sequentially file after file
>with unknown order but if somebody needs it, the patch can be easily
>extended (i.e. exec  task can be easily extended by additional
>flag: 'sequential="true"'). Maybe there are usefull file/source processors
>which can deal with single file at once only. All tools I use can take a
>list of arguments, and single invocation is enough.
>
>
>best regards
>Mariusz