RE: Is there a problem to adding the POM element now+POM4in Maven 1.0?

[Vincent Massol <vm...@pivolis.com>]

> -----Original Message-----
> From: Jason van Zyl [mailto:jvanzyl@maven.org]
> Sent: 21 April 2004 21:58
> To: Maven Developers List
> Subject: RE: Is there a problem to adding the POM <type> element
> now+POM4in Maven 1.0?
> 
> On Wed, 2004-04-21 at 15:39, Vincent Massol wrote:
> 
> > Sounds ok to me in principle. Is it a big change?
> 
> I'm honestly not sure how much work it is, but I don't imagine more
than
> a days work looking at the code.
> 
> > Can it be done
> > relatively quickly on HEAD?
> 
> I don't think quickly is as important a criterion as properly? The use
> of the model and components being backported in subsequent 1.x
releases
> is something I am adamant about. Once the generated model artifacts
are
> integrated subsequent changes are easy, in addition to the
documentation
> always being up-to-date.

The reason I'm asking is to judge whether we can commit it to HEAD
easily. I would like to avoid as much as possible big changes that take
long time. Remember the problem we had a few months back when we made
some big change in HEAD and HEAD stayed broken for way too long.

> 
> > Will it be backward compatible for 1.0
> > users?
> 
> To my knowledge what is represented in model file for 3.0.0 is
accurate,
> but if it's not it's easy to correct. To use the v4.0.0 POM we would
> just need to look at the version specified and folks could even use a
> v4.0.0 POM and internally we could convert back to v3.0.0 if the
> majority of the plugins require it.

Cool

Thanks
-Vincent

> 
> > Thanks
> > -Vincent
> >
> > > -----Original Message-----
> > > From: Jason van Zyl [mailto:jvanzyl@maven.org]
> > > Sent: 21 April 2004 21:22
> > > To: Maven Developers List
> > > Subject: RE: Is there a problem to adding the POM <type> element
now
> > > +POM4in Maven 1.0?
> > >
> > > On Wed, 2004-04-21 at 15:12, Vincent Massol wrote:
> > > > I know I was missing something! I had somehow forgotten we were
in a
> > rc
> > > > cycle! :-)
> > > >
> > > > I can use HEAD for this. Brett, do you know if HEAD is up to
date
> > with
> > > > the 1.0 branch?
> > >
> > > If this will be for subsequent 1.x releases then I would like the
> > > generated model used as the meshing of the v3 and v4 models is the
> > path
> > > of unification between maven1 and maven2.
> > >
> > > But for the simple fact that just using the model file means we
have
> > > instant documentation that can't get out of date. We don't even
have
> > to
> > > use the ProjectBuilder component, just using the generated model
> > > artifacts (xpp3 reader/writer, XSD and Xdoc which has a sample
> > > descriptor with links) has a huge advantage.
> > >
> > > > Thanks
> > > > -Vincent
> > > >
> > > > > -----Original Message-----
> > > > > From: Jason van Zyl [mailto:jvanzyl@maven.org]
> > > > > Sent: 21 April 2004 20:59
> > > > > To: Maven Developers List
> > > > > Subject: Re: Is there a problem to adding the POM <type>
element
> > now +
> > > > > POM4in Maven 1.0?
> > > > >
> > > > > On Wed, 2004-04-21 at 14:38, Vincent Massol wrote:
> > > > > > Hi,
> > > > > >
> > > > > > Would it be a problem to add the <type> element for Maven
RC3?
> > > > >
> > > > > It most likely wouldn't be a problem, but during RC is not the
> > time to
> > > > > be changing the model.
> > > > >
> > > > > You can see the differences here between v3 and v4. Anything
with
> > > > 3.0.0+
> > > > > is carried forward, anything with 3.0.0 is not generated when
> > v4.0.0
> > > > > set.
> > > > >
> > > > > I don't particularly care, but I leave the call to Brett
because
> > he's
> > > > > dealing with the 1.0.
> > > > >
> > > > > One of the first backports I want to do though post 1.0 is to
use
> > the
> > > > > generated model: for clarity and the automatically generated
> > > > > documentation that is contained within the model.
> > > > >
> > > > > > If we
> > > > > > make it optional (and default for example to "jar")
> > > > >
> > > > > That what it's modelled as in v4.0.0.
> > > > >
> > > > > >  I think it will be
> > > > > > 100% backward compatible. The plugins will not use it for
now.
> > But
> > > > at
> > > > > > least the users will be able to start using it to type their
> > > > projects.
> > > > >
> > > > > Now that you mention this, I don't think it's a good idea
because
> > what
> > > > > are the types going to be? This type will be analogous to the
> > > > > discussions we had regarding dependency type and possibly
kind. I
> > > > would
> > > > > prefer people not start using this element until we have
defined
> > what
> > > > > the values can be.
> > > > >
> > > > > > Actually I don't recall why my changes for POM4 were removed
> > from
> > > > the
> > > > > > Maven 1.0 branch as I think they were all 100% backward
> > compatible,
> > > > > > including plugins.
> > > > >
> > > > > Because they happened during the rc cycle? I don't know. I
didn't
> > > > notice
> > > > > myself.
> > > > >
> > > > > > I need to ask: Why couldn't we support both POM3 and POM4
for
> > Maven
> > > > 1.0?
> > > > >
> > > > > Because we don't know what v4 will look like completely. I
have no
> > > > > problem supporting v4 later on in the 1.x cycle but not now.
There
> > are
> > > > > already differences that would make it difficult.
> > > > >
> > > > > Modello can now generate distinct versions of the model, and
I've
> > > > > partially completed the generation of converters between
distinct
> > > > > versions of the model. That is the tool I would like to use to
> > convert
> > > > > on the fly and in the conversion wizard.
> > > > >
> > > > > > The only constraint that we will have is that all plugins
must
> > > > continue
> > > > > > to work with POM3 till version 1.0 is released.
> > > > >
> > > > > I'm all for support for v4 in the 1.x but we don't know yet
what
> > it
> > > > will
> > > > > look like in its entirely and it probably just isn't a good
idea
> > to
> > > > > introduce yet incomplete idea.
> > > > >
> > > > > Let's get 1.0 out and then go to town with subsequent changes.
I
> > think
> > > > > that's a more reasonable plan of action.
> > > > >
> > > > > > Thanks
> > > > > > -Vincent
> > > > > >
> > > > > >
> > > > > >
> > > >
> >
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> > > > >
> > > > > --
> > > > > jvz.
> > > > >
> > > > > Jason van Zyl
> > > > > jason@maven.org
> > > > > http://maven.apache.org
> > > > >
> > > > > happiness is like a butterfly: the more you chase it, the more
it
> > will
> > > > > elude you, but if you turn your attention to other things, it
will
> > > > come
> > > > > and sit softly on your shoulder ...
> > > > >
> > > > >  -- Thoreau
> > > > >
> > > > >
> > > > >
> >
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> > > >
> > > >
> > > >
> > > >
> >
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> > >
> > > --
> > > jvz.
> > >
> > > Jason van Zyl
> > > jason@maven.org
> > > http://maven.apache.org
> > >
> > > happiness is like a butterfly: the more you chase it, the more it
will
> > > elude you, but if you turn your attention to other things, it will
> > come
> > > and sit softly on your shoulder ...
> > >
> > >  -- Thoreau
> > >
> > >
> > >
---------------------------------------------------------------------
> > > To unsubscribe, e-mail: dev-unsubscribe@maven.apache.org
> > > For additional commands, e-mail: dev-help@maven.apache.org
> >
> >
> >
> >
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> 
> --
> jvz.
> 
> Jason van Zyl
> jason@maven.org
> http://maven.apache.org
> 
> happiness is like a butterfly: the more you chase it, the more it will
> elude you, but if you turn your attention to other things, it will
come
> and sit softly on your shoulder ...
> 
>  -- Thoreau
> 
> 
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RE: Is there a problem to adding the POM element now+POM4in Maven 1.0?

[Jason van Zyl <jv...@maven.org>]

On Wed, 2004-04-21 at 16:50, Vincent Massol wrote:

> The reason I'm asking is to judge whether we can commit it to HEAD
> easily. I would like to avoid as much as possible big changes that take
> long time. Remember the problem we had a few months back when we made
> some big change in HEAD and HEAD stayed broken for way too long.

It was way too long, it just shouldn't have been committed. But that
won't happen again because I won't commit code anymore simply because
someone asks me to.

> > 
> > > Will it be backward compatible for 1.0
> > > users?
> > 
> > To my knowledge what is represented in model file for 3.0.0 is
> accurate,
> > but if it's not it's easy to correct. To use the v4.0.0 POM we would
> > just need to look at the version specified and folks could even use a
> > v4.0.0 POM and internally we could convert back to v3.0.0 if the
> > majority of the plugins require it.
> 
> Cool

If you want to see it integrated in working form I can do it a day next
week. I assume you want to try out some of the newer elements?

We'll just see what Brett's up to, I don't want to step on any toes as
the 1.0 code is his as far as I'm concerned.

-- 
jvz.

Jason van Zyl
jason@maven.org
http://maven.apache.org

happiness is like a butterfly: the more you chase it, the more it will
elude you, but if you turn your attention to other things, it will come
and sit softly on your shoulder ...

 -- Thoreau 


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