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From Matt Benson <gudnabr...@yahoo.com>
Subject Re: OS-specific execution of any element requested
Date Fri, 20 Sep 2002 15:58:46 GMT
I thought that would be nice too, having if and unless
available everywhere.  I don't really think about it
anymore.  What you do is wrap these types of things in
other targets, put the if/unless on the targets, and
make your main target dependent on those.

-Matt

--- Markus Kramer <Markus.Kramer@mpi.nl> wrote:
> Matt,
> this sounds wonderful, trouble is that the unless
> attribute is not allowed for
> things like paths:
>     <classpath refid="extpacElan"
> unless="${onWindows}" />
> brakes Ant.
> My proposal would be to have the unless (and the if)
> attribute allowed on
> *any* Ant element.
> This is more flexible than my first proposal to have
> an "os" attribute.
> Trouble is, that "if" attributes are not allowed
> everywhere.
> I even don't know where they are allowed.
> 
> All of you, have a nice weekend.
> Markus
> 
> 
> 
> Matt Benson wrote:
> 
> > Or making all the targets dependencies and relying
> on
> > if/unless to stop the wrong ones from executing is
> > probably the intended way, as opposed to <antcall>
> > which is nice for more dynamic things.
> >
> > -Matt
> >
> > --- EXT / FOCAL MALAPRADE Roland
> > <ext.focal.malaprade@sncf.fr> wrote:
> > > you could use a <condition> as such:
> > >
> > >   <condition property="isWindows">
> > >       <os family="windows" />
> > >   </condition>
> > >
> > > with a PatternSet. i.e.:
> > >
> > > <patternset id="sources" >
> > >   <include name="files" if="isWindows"/>
> > > </patternset>
> > >
> > > and then call a target as such:
> > >
> > > <target name="fooWindows" if="isWindows"/>
> > >
> > > if you make one target per os, and call all of
> them
> > > with an <antcall>, the
> > > right one should get called.
> > >
> > > Roland
> > >
> > >
> > >
> > > -----Message d'origine-----
> > > De : Markus Kramer [mailto:Markus.Kramer@mpi.nl]
> > > Envoye : vendredi 20 septembre 2002 12:53
> > > A : ant-user@jakarta.apache.org
> > > Objet : OS-specific execution of any element
> > > requested
> > >
> > >
> > > I don't see a way to constrain elements of a
> java
> > > target to the
> > > operating system.
> > > This leads to "Copy and Paste" java targets, one
> for
> > > each OS, which is a
> > > bad thing.
> > > The following does not work, but it would be
> nice to
> > > have, I think.
> > > I propose that *each* element can have a os
> > > attribute.
> > > Below, there are three offending os="windows"
> > > attributes at the jvmarg
> > > and the pathelement elements.
> > > The meaning of a jvmarg element with an
> os="windows"
> > > attributes would be
> > > that its only regarded when on Win32.
> > >
> > >   <java classname="foo.bar.Main"
> > >         fork="yes" >
> > >  <arg value="${eaffile}"/>
> > >  <jvmarg
> value="-Djava.ext.dirs=${src}/java.ext.dir"
> > > />
> > >  <jvmarg
> > >
> value="-Djava.library.path=${src}/jmf__Vwin2.1.1a" /
> > > os="windows">
> > >     <jvmarg value="${jvmarg}"/>
> > >     <classpath refid="extpacFooBar"/>
> > >     <classpath>
> > >       <pathelement location="${build}"/>
> > >       <pathelement
> > >
> location="${src}/mpi/lib/jmf__Vwin2.1.1a/jmf.jar"/
> > > os="windows">
> > >       <pathelement
> > >
> location="${src}/mpi/lib/jmf__Vwin2.1.1a/sound.jar"/
> > > os="windows">
> > >     </classpath>
> > >   </java>
> > >
> > > The same is true for OS-specific build pargets.
> > > Does Ant provide a workaround?
> > >
> > > best
> > > -Markus
> > >
> > >
> > >
> > >
> > > --
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