You can also look at the <if> task (part of the
ant-contrib project in SourceForge) which along with
the standard condition tasks will allow you to do the
following
<if>
<not>
<isset property="some.thing">
</not>
<then>
<things to do when some.thing is not set>
</then>
<else>
<optional else block.../>
</else>
</if>
--- Douglas Kramer <[EMAIL PROTECTED]> wrote:
> Found "unless" attribute of target.
>
> This simpler version works if ${MYFILE} resource is
> a file or directory,
> but fails if a symlink (which is what I devised this
> for).
>
> <target name="test">
> <available file="${MYFILE}"
> property="file.exists" value="true" />
> </target>
>
> <target name="dosomething" depends="test"
> unless="file.exists">
> <echo message="Do something here">
> </target>
>
> Am bummed out.
>
> -Doug
>
> Douglas Kramer wrote:
> > Okay, try again.
> >
> > Need to create a file (actually a symlink) if none
> exists.
> >
> > Is there a way to set a property true if a
> resource does *not* exist?
> >
> >
> > DETAIL
> --------------------------------------------
> >
> > The dosomething task will do something only if the
> file
> > exists.
> >
> > <target name="test">
> > <available file="${MYFILE}"
> property="file.exists" value="true" />
> > </target>
> >
> >
> > <target name="dosomething" depends="test"
> if="file.exists">
> > <echo message="Do something here">
> > </target>
> >
> > I tried using <not>, but it won't work, because
> the "not"
> > operation of "is not set" is not true.
> >
> > <target name="test">
> > <condition property="file.notexists">
> > <not>
> > <available file="${MYFILE}"
> property="file.exists"
> > value="true" />
> > </not>
> > </condition>
> > </target>
> >
> > Ideas? I don't see a NotAvailable task.
> >
> > -Doug
> >
> >
>
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