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From David Weintraub <qazw...@gmail.com>
Subject Re: Make copy task fail if any destination file already exists?
Date Tue, 27 Jan 2009 23:34:46 GMT
Sorry I didn't get back to you earlier...

One of the parameters of the <copy> task is the "overwrite" parameter.
This will prevent a file from being copied over even if the file
you're copying is a newer version. That won't fail the copy task, but
it will prevent you from overwriting existing files.

A possibility is the AntContrib <foreach> task
<http://ant-contrib.sourceforge.net/tasks/tasks/foreach.html> combined
with the fail task which can fail on a condition. You can iterate over
the list of files in what you're copying, and then check to see if
that file already exists:

<foreach
    target="file.exists.test"
    param="file.name">
    <fileset dir="${copy.dir}"/>
<foreach>

<target name="file.exists.test">
    <fail message="${file.name} already exists">
    <condition>
       <available file="${file.name}"
    </condition>
</target>

On Mon, Jan 26, 2009 at 6:36 AM, Yves Dessertine <yvesd.public@gmail.com> wrote:
> Hi there.
>
> It is possible with Ant to make a copy task fail if any destination
> file already exists?
>
> I found no clue in the docs (noticed only the "failonerror" param in
> copy task (http://ant.apache.org/manual/CoreTasks/copy.html) and in
> the condition for the "fail" task, but nothing relevant IMHO).
>
> I know it would be possible to check the existance of an entire
> folder, but this isn't suitable for my project.
>
> I'd appreciate any help.
>
> Thanks,
>
> Yves Dessertine
>
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David Weintraub
qazwart@gmail.com

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