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From Matt Benson <gudnabr...@yahoo.com>
Subject Re: return early from a macrodef?
Date Fri, 10 Nov 2006 22:38:21 GMT
Jake: Why [can't you/are you reluctant to] use target
dependencies to do this as opposed to macros?

br,
Matt

--- Jacob Kjome <hoju@visi.com> wrote:

> Quoting John Norvell <928572663@cox.net>:
> 
> > https://sourceforge.net/projects/antcontrib/
> extension library has the
> > <if> task that uses conditions.   Would you be
> able to use that?
> >
> 
> Curiously enough, the whole point of needing to be
> able to do this is to
> bootstrap ant-contrib without requiring it to be in
> a user's
> ${user.home}/.ant/lib directory.  If it is there,
> then I'd just like to use it
> (and not force the user, in this case, to define a
> path with an id called
> "ant-contrib".  See more on this below). If not,
> then I'd typedef it with a
> user-defined path, with the id "ant-contrib", which
> would be required in the
> absence of ant-contrib.jar in .ant/lib.  It's all
> about flexibility.
> 
> Now, there would be no problem typedefing the
> ant-contrib stuff if missing
> classpathrefs didn't cause failure even when the
> typedef's onerror is "ignore"
> or "report".  But it does fail, so I need to check
> if the reference is defined.
>  This would be the condition I mentioned previously.
> 
> So, as you can see, I need to be able to do this
> little bit without the help of
> ant-contrib, since it won't be available until I
> bootstrap it.  Hence, the
> quest to find a way to return early from a macrodef,
> which is where I put the
> <typedef>, to avoid invoking the <typedef> when
> ant-contrib.jar is already in
> .ant/lib.  Hence, avoiding the need force users to
> provide the path with id
> "ant-contrib", which would have the ant-contrib.jar
> as one of its path
> elements.
> 
> Besides this specific case, I can see an early
> return as being generally useful
> anyway.  So I'm quite curious to find out if it is
> possible using a scriptdef.
> 
> 
> For more detailed info on typedef failing with a
> missing classpathref, even when
> onerror is "ignore" or "report", see my previous
> post from a few days ago that
> never got answered...
> 
>
http://marc.theaimsgroup.com/?l=ant-user&m=116292805430859&w=2
> 
> Jake
> 
> > -J
> >
> > Jacob Kjome wrote:
> > >
> > > In a macrodef, if I check a condition and that
> condition is true, I'd like
> > to
> > > return early from the macrodef and not run any
> of the rest of its contents.
> >  Is
> > > it possible using a <scriptdef> to write a
> script that can force an early
> > return
> > > from the <sequential> part of the macrodef if
> the condition is met?  This
> > is
> > > kind of akin to an if/unless on a target.  I'm
> not quite seeing where I
> > would
> > > be able to hook into Ant to do such a thing.  Is
> it impossible?  I hope
> > not.
> > >
> > > BTW, I'm not talking about <fail/>.  I don't
> want the build to end when the
> > > condition is met.  I just want to skip the rest
> of the <macrodef> contents
> > and
> > > continue processing.
> > >
> > >
> > > Jake
> > >
> > >
>
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> >
> >
> >
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> 
> 
> 
>
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